(function () {
  "use strict";

  var state = { session: null, plants: [], orders: [], selectedOrder: [], stripeConfigured: false, vatRate: 8.1, configuredPlantId: null, checkoutConfigurationId: null, replacementOrderId: null, codeDeletionOrderId: null, plantDeletion: null, wizardStep: 0, forecastRequest: 0, forecastResult: null, forecastPlantId: null, forecastVisibleSeries: null, forecastRangeStart: null, forecastRangeEnd: null, forecastHistoryDays: 1, faultRequest: 0, wizardCatalog: null, deviceDrafts: {}, pvSurfaceDrafts: [] };
  var managerPrices = {
    manager_standard: { name: "Manager ohne Peak Shaving", price: 308.15, setup: 114.60 },
    manager_peak: { name: "Manager mit Peak Shaving", price: 329.05, setup: 141.80 },
    manager_peak_upgrade: { name: "Upgrade auf Peak Shaving", price: 20.90, setup: 0 }
  };
  var deviceLabels = { battery: "Batteriespeicher", buffer_storage: "Pufferspeicher", ev_charger: "EV-Ladestation", consumer_single: "Verbraucher einstufig", boiler_multi: "Boiler mehrstufig", heat_pump: "Wärmepumpe" };
  var roleLabels = { owner: "Eigentümer", admin: "Administrator", operator: "Operator", billing: "Abrechnung", viewer: "Lesend" };
  var money = new Intl.NumberFormat("de-CH", { style: "currency", currency: "CHF" });
  var byId = function (id) { return document.getElementById(id); };
  var toastTimer;
  var resetToken = "";

  function escapeHtml(value) {
    return String(value == null ? "" : value).replace(/[&<>"']/g, function (character) {
      return { "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;", "'": "&#039;" }[character];
    });
  }

  function applyCatalog(result) {
    var items = result.items || {};
    state.vatRate = Number(result.vatRate || 0);
    ["manager_standard", "manager_peak", "manager_peak_upgrade"].forEach(function (key) {
      if (!items[key]) return;
      managerPrices[key] = {
        name: items[key].name,
        price: Number(items[key].unitAmount) / 100,
        setup: Number(items[key].setupAmount || 0) / 100
      };
    });
    document.querySelectorAll(".module-row").forEach(function (row) {
      var item = items[row.dataset.key];
      if (!item) return;
      row.dataset.name = item.name;
      row.dataset.price = String(Number(item.unitAmount) / 100);
      row.dataset.setup = String(Number(item.setupAmount || 0) / 100);
      row.dataset.termMonths = String(Number(item.termMonths || 0));
      row.children[1].textContent = money.format(Number(item.unitAmount) / 100) + (item.termMonths ? " / Jahr" : "");
      row.children[2].textContent = item.termMonths ? "–" : money.format(Number(item.setupAmount || 0) / 100);
    });
    byId("plantManagerStandardPrice").textContent = money.format(managerPrices.manager_standard.price) + " netto";
    byId("plantManagerPeakPrice").textContent = money.format(managerPrices.manager_peak.price) + " netto";
    byId("billingBasePrice").textContent = money.format(Number(items.cost_report?.unitAmount || 0) / 100) + " netto";
    byId("billingPowerPrice").textContent = money.format(Number(items.cost_meter_power?.unitAmount || 0) / 100) + " netto pro Zähler";
    byId("billingAuxPrice").textContent = money.format(Number(items.cost_meter_aux?.unitAmount || 0) / 100) + " netto pro Zähler";
    byId("vatLabel").textContent = "MwSt. " + state.vatRate.toLocaleString("de-CH") + " %";
  }

  async function api(path, options) {
    var request = Object.assign({ headers: {} }, options || {});
    request.headers = Object.assign({}, request.headers);
    if (request.body && typeof request.body !== "string") {
      request.headers["Content-Type"] = "application/json";
      request.body = JSON.stringify(request.body);
    }
    if (state.session && state.session.csrfToken && request.method && request.method !== "GET") request.headers["X-CSRF-Token"] = state.session.csrfToken;
    var response = await fetch(path, request);
    var result = await response.json().catch(function () { return {}; });
    if (!response.ok) throw new Error(result.error || "Die Anfrage konnte nicht verarbeitet werden.");
    return result;
  }

  function toast(message) {
    var node = byId("toast");
    node.textContent = message;
    node.classList.add("show");
    clearTimeout(toastTimer);
    toastTimer = setTimeout(function () { node.classList.remove("show"); }, 3600);
  }

  function setBusy(form, busy) {
    var button = form.querySelector("button[type='submit']");
    if (!button.dataset.label) button.dataset.label = button.textContent;
    button.disabled = busy;
    button.textContent = busy ? "Bitte warten …" : button.dataset.label;
  }

  function switchAuth(mode) {
    var login = mode === "login";
    byId("authTabs").classList.remove("hidden");
    byId("loginTab").classList.toggle("active", login);
    byId("registerTab").classList.toggle("active", !login);
    byId("loginForm").classList.toggle("hidden", !login);
    byId("registerForm").classList.toggle("hidden", login);
    byId("forgotForm").classList.add("hidden");
    byId("resetForm").classList.add("hidden");
  }

  function specialAuth(formId) {
    byId("authTabs").classList.add("hidden");
    ["loginForm", "registerForm", "forgotForm", "resetForm"].forEach(function (id) { byId(id).classList.toggle("hidden", id !== formId); });
  }

  function authNotice(message, error) {
    var notice = byId("authNotice");
    notice.textContent = message || "";
    notice.classList.toggle("hidden", !message);
    notice.classList.toggle("error", Boolean(error));
  }

  function initials(name) {
    return String(name || "EN").split(/\s+/).slice(0, 2).map(function (part) { return part[0]; }).join("").toUpperCase();
  }

  function showAuth() {
    byId("portalApp").classList.add("hidden");
    byId("authScreen").classList.remove("hidden");
  }

  function workspaceOptions() {
    var organizations = state.session.organizations || [];
    if (!organizations.length) return "<option value=''>Persönlicher Bereich</option>";
    return organizations.map(function (organization) { return "<option value='" + organization.id + "'>" + escapeHtml(organization.name) + "</option>"; }).join("");
  }

  function renderSession() {
    var session = state.session;
    var context = session.organization;
    var organizations = session.organizations || [];
    byId("topInitials").textContent = initials(session.user.name);
    byId("topName").textContent = session.user.name;
    byId("overviewOrg").textContent = context.name;
    byId("billingOrg").textContent = context.name;
    byId("accountName").textContent = session.user.name;
    byId("accountEmail").textContent = session.user.email;
    byId("accountOrg").textContent = context.name;
    byId("workspaceRole").textContent = roleLabels[context.role] || context.role;
    ["workspaceSelect", "accountWorkspaceSelect"].forEach(function (id) {
      byId(id).innerHTML = workspaceOptions();
      byId(id).value = context.id == null ? "" : String(context.id);
      byId(id).disabled = organizations.length <= 1;
    });
    byId("accountWorkspaceLabel").classList.toggle("hidden", organizations.length <= 1);
    byId("organizationCreateSection").classList.toggle("hidden", organizations.length > 0);
    var canInvite = context.type === "organization" && ["owner", "admin"].includes(context.role);
    byId("invitationSection").classList.toggle("hidden", !canInvite);
    var canManage = context.type === "personal" || ["owner", "admin", "operator"].includes(context.role);
    document.querySelectorAll("[data-open-plant]").forEach(function (button) { button.disabled = !canManage; });
  }

  async function acceptStoredInvitation() {
    var token = sessionStorage.getItem("enelix_invitation_token");
    if (!token || !state.session) return;
    try {
      var result = await api("/api/invitations/accept", { method: "POST", body: { token: token } });
      sessionStorage.removeItem("enelix_invitation_token");
      state.session = result.session;
      renderSession();
      toast(result.message);
    } catch (error) {
      sessionStorage.removeItem("enelix_invitation_token");
      toast(error.message);
    }
  }

  async function showPortal(session) {
    state.session = session;
    byId("authScreen").classList.add("hidden");
    byId("portalApp").classList.remove("hidden");
    renderSession();
    await acceptStoredInvitation();
    await loadPortalHealth();
    await Promise.all([loadPlants(), loadOrders(), loadInvitations()]);
    var initialView = location.hash.replace("#", "");
    var allowedViews = ["overview", "licenses", "forecast", "faults", "account", "configurator"];
    showView(allowedViews.includes(initialView) ? initialView : "overview");
    var query = new URLSearchParams(location.search);
    if (query.get("checkout") === "success") toast("Zahlung abgeschlossen. Stripe bestätigt die Freischaltung in wenigen Sekunden.");
    if (query.get("checkout") === "free") toast("Kostenlose Jahreslizenz wurde freigeschaltet.");
    if (query.get("checkout") === "cancelled") toast("Zahlung abgebrochen. Es wurde keine Lizenz aktiviert.");
    if (query.has("checkout")) history.replaceState(null, "", location.pathname + location.hash);
  }

  function showView(name) {
    document.querySelectorAll(".view").forEach(function (view) { view.classList.toggle("active", view.id === "view-" + name); });
    document.querySelectorAll(".nav-item").forEach(function (item) { item.classList.toggle("active", item.dataset.view === name); });
    history.replaceState(null, "", location.pathname + location.search + "#" + name);
    if (name === "account") {
      loadInvitations();
      loadOrders();
    }
    if (name === "forecast") updateForecast();
    if (name === "faults") updateFaults();
    window.scrollTo({ top: 0, behavior: "smooth" });
  }

  async function loadPortalHealth() {
    var health = await api("/healthz");
    state.stripeConfigured = health.stripe === "configured";
    ["stripeStatus", "billingStripeStatus"].forEach(function (id) {
      var node = byId(id);
      if (!node) return;
      node.textContent = state.stripeConfigured ? "Stripe Sandbox bereit" : "Stripe Sandbox offen";
      node.className = "status " + (state.stripeConfigured ? "available" : "review");
    });
    if (byId("stripeProviderState")) byId("stripeProviderState").textContent = state.stripeConfigured ? "Bereit" : "Nicht konfiguriert";
  }

  async function loadPlants() {
    state.plants = (await api("/api/plants")).plants || [];
    renderPlants();
  }

  async function loadOrders() {
    if (!state.session) return;
    state.orders = (await api("/api/orders")).orders || [];
    renderOrders();
    renderPlants();
  }

  async function loadInvitations() {
    if (!state.session || byId("invitationSection").classList.contains("hidden")) return void (byId("pendingInvitations").innerHTML = "");
    var invitations = (await api("/api/invitations")).invitations || [];
    byId("pendingInvitations").innerHTML = invitations.map(function (invitation) {
      return "<div><span><strong>" + escapeHtml(invitation.invited_email) + "</strong><small>" + escapeHtml(roleLabels[invitation.role] || invitation.role) + "</small></span><small>offen</small></div>";
    }).join("");
  }

  function managerLabel(value) {
    return value === "billing_manager"
      ? "Abrechnungsmanager"
      : (managerPrices[value] || managerPrices.manager_standard).name;
  }
  function connectionLabel(plant) { return plant.installation_id ? plant.installation_id : "Noch nicht verknüpft"; }

  function activationOrderForPlant(plantId) {
    var paid = state.orders.filter(function (order) { return order.plant_id === plantId && order.status === "paid"; });
    var managerOrders = paid.filter(function (order) {
      return (order.lines || []).some(function (line) {
        return line.line_type === "license" && ["manager_standard", "manager_peak"].includes(line.catalog_key);
      });
    });
    var candidates = managerOrders.length ? managerOrders : paid;
    return candidates.find(function (order) { return Boolean(order.activated_installation_id); })
      || candidates.find(function (order) { return Boolean(order.code_hint); })
      || candidates[candidates.length - 1]
      || null;
  }

  function openReplacementDialog(orderId, plantName, connected) {
    state.replacementOrderId = orderId;
    byId("replaceCodeSystem").textContent = plantName;
    byId("replaceCodeBinding").classList.toggle("hidden", !connected);
    byId("replaceCodeError").textContent = "";
    byId("replaceCodeDialog").showModal();
  }

  function openCodeDeletionDialog(orderId, plantName) {
    state.codeDeletionOrderId = orderId;
    byId("deleteCodeSystem").textContent = plantName;
    byId("deleteCodeError").textContent = "";
    byId("deleteCodeDialog").showModal();
  }

  function openPlantDeletionDialog(plantId, plantName, hasPaidLicense) {
    state.plantDeletion = { id: plantId, name: plantName, hasPaidLicense: hasPaidLicense };
    byId("deletePlantSystem").textContent = plantName;
    byId("deletePaidSystem").textContent = plantName;
    byId("deletePlantError").textContent = "";
    byId("deletePaidError").textContent = "";
    byId("deletePlantDialog").showModal();
  }

  function renderPlants() {
    var hasPlants = state.plants.length > 0;
    var managerPlants = state.plants.filter(function (plant) { return plant.manager_variant !== "billing_manager"; });
    var hasManagerPlants = managerPlants.length > 0;
    var paidOrders = state.orders.filter(function (order) { return order.status === "paid"; });
    var paidLicenses = paidOrders.reduce(function (sum, order) {
      return sum + (order.lines || []).reduce(function (lineSum, line) {
        return lineSum + (line.line_type === "license" ? Number(line.quantity) : 0);
      }, 0);
    }, 0);
    byId("metricPlants").textContent = state.plants.length;
    byId("metricManagers").textContent = paidLicenses;
    byId("metricConnected").textContent = state.plants.filter(function (plant) { return Boolean(plant.installation_id); }).length;
    byId("moduleNoPlant").classList.toggle("hidden", hasPlants);
    byId("moduleConfigurator").classList.toggle("hidden", !hasPlants);
    byId("forecastEmpty").classList.toggle("hidden", hasManagerPlants);
    byId("forecastContent").classList.toggle("hidden", !hasManagerPlants);
    byId("faultEmpty").classList.toggle("hidden", hasManagerPlants);
    byId("faultContent").classList.toggle("hidden", !hasManagerPlants);
    var canDelete = state.session.organization.type === "personal" || ["owner", "admin"].includes(state.session.organization.role);
    byId("overviewPlants").innerHTML = hasPlants ? "<div class='license-list'>" + state.plants.map(function (plant) {
      var orders = state.orders.filter(function (order) { return order.plant_id === plant.id; });
      var paid = orders.filter(function (order) { return order.status === "paid"; });
      var licenseCount = paid.reduce(function (sum, order) {
        return sum + (order.lines || []).reduce(function (lineSum, line) {
          return lineSum + (line.line_type === "license" ? Number(line.quantity) : 0);
        }, 0);
      }, 0);
      var activated = paid.some(function (order) { return Boolean(order.activated_installation_id); });
      var licenseState = activated ? "Verwendet" : (paid.length ? "Bezahlt" : "Noch nicht gekauft");
      var stateClass = activated ? "available" : (paid.length ? "neutral" : "review");
      var codeOrder = activationOrderForPlant(plant.id);
      var codeAction = codeOrder
        ? "<button class='button compact code-replacement' data-replace-code='" + escapeHtml(codeOrder.id) + "' data-replace-plant='" + escapeHtml(plant.name) + "' data-replace-connected='" + (activated ? "true" : "false") + "'>" + (codeOrder.code_hint === "Gelöscht" ? "Neuen Lizenzcode generieren" : "Lizenzcode neu generieren") + "</button>"
        : "";
      var deleteCodeAction = canDelete && codeOrder && codeOrder.code_hint && codeOrder.code_hint !== "Gelöscht"
        ? "<button class='button compact destructive-action' data-delete-code='" + escapeHtml(codeOrder.id) + "' data-delete-code-plant='" + escapeHtml(plant.name) + "'>Lizenzcode löschen</button>"
        : "";
      var deletePlantAction = canDelete
        ? "<button class='text-action destructive-link' data-delete-plant='" + escapeHtml(plant.id) + "' data-delete-plant-name='" + escapeHtml(plant.name) + "' data-delete-plant-paid='" + (paid.length ? "true" : "false") + "'>Anlage löschen</button>"
        : "";
      var billingPlant = plant.manager_variant === "billing_manager";
      var extendAction = billingPlant
        ? "<button class='button compact' data-billing-order='" + escapeHtml(plant.id) + "'>Zähler erweitern</button>"
        : "<button class='button compact' data-order='" + escapeHtml(plant.id) + "'>Erweitern</button>";
      return "<div class='license-row'><span class='license-main'><strong>" + escapeHtml(plant.name) + "</strong><small>" + escapeHtml(plant.location) + "</small></span>" +
        "<span><small>" + (billingPlant ? "Lizenztyp" : "Manager") + "</small><strong>" + escapeHtml(managerLabel(plant.manager_variant)) + "</strong></span>" +
        "<span><small>Lizenzen</small><strong>" + licenseCount + "</strong></span>" +
        "<span><small>Verwendung</small><b class='status " + stateClass + "'>" + licenseState + "</b></span>" +
        "<span><small>Verbindung</small><strong>" + escapeHtml(plant.installation_id ? (billingPlant ? "Abrechnung verbunden" : "Manager verbunden") : "Nicht verbunden") + "</strong></span>" +
        "<span class='license-actions'>" + extendAction + codeAction + deleteCodeAction + deletePlantAction + "</span></div>";
    }).join("") + "</div>" : "<div class='empty-state'><strong>Noch keine Lizenz vorhanden</strong><p>Lege eine Lizenz direkt an oder starte mit dem Systemkonfigurator.</p><button class='button primary' type='button' data-open-new-license>Neue Lizenz</button></div>";
    var options = managerPlants.map(function (plant) { return "<option value='" + escapeHtml(plant.id) + "'>" + escapeHtml(plant.name) + "</option>"; }).join("");
    var orderValue = byId("orderPlant").value;
    var forecastValue = byId("forecastPlant").value;
    var faultValue = byId("faultPlant").value;
    byId("orderPlant").innerHTML = options;
    byId("forecastPlant").innerHTML = options;
    byId("faultPlant").innerHTML = options;
    if (managerPlants.some(function (plant) { return plant.id === orderValue; })) byId("orderPlant").value = orderValue;
    if (managerPlants.some(function (plant) { return plant.id === forecastValue; })) byId("forecastPlant").value = forecastValue;
    if (managerPlants.some(function (plant) { return plant.id === faultValue; })) byId("faultPlant").value = faultValue;
    if (state.configuredPlantId && managerPlants.some(function (plant) { return plant.id === state.configuredPlantId; })) byId("orderPlant").value = state.configuredPlantId;
    prepareOrderEditor();
    updateForecast();
    updateFaults();
  }

  function renderOrders() {
    var labels = { creating_checkout: "Checkout wird erstellt", checkout_open: "Zahlung offen", checkout_failed: "Checkout fehlgeschlagen", payment_processing: "Zahlung wird verarbeitet", payment_failed: "Zahlung fehlgeschlagen", expired: "Abgelaufen", paid: "Bezahlt" };
    var canDelete = state.session.organization.type === "personal" || ["owner", "admin"].includes(state.session.organization.role);
    byId("ordersBody").innerHTML = state.orders.length ? state.orders.map(function (order) {
      var count = (order.lines || []).reduce(function (sum, line) { return sum + (line.line_type === "license" ? line.quantity : 0); }, 0);
      var hasLicenseLines = (order.lines || []).some(function (line) { return line.line_type === "license"; });
      var action = "–";
      if (order.status === "paid" && !hasLicenseLines) {
        action = "<small>Generator / Ersteinrichtung bezahlt</small>";
      } else if (order.status === "paid" && order.code_hint === "Gelöscht") {
        action = "<button class='text-action' data-code='" + order.id + "' data-rotate='true'>Neuen Code per E-Mail senden</button><small>Code gelöscht</small>";
      } else if (order.status === "paid" && order.code_hint) {
        action = "<button class='text-action' data-code='" + order.id + "' data-rotate='true'>Neuen Code per E-Mail senden</button>" +
          (canDelete ? "<button class='text-action destructive-link' data-delete-code='" + order.id + "' data-delete-code-plant='" + escapeHtml(order.plant_name) + "'>Code löschen</button>" : "") +
          "<small>" + escapeHtml(order.activated_installation_id ? "Verknüpft · " + order.code_hint : order.code_hint) + "</small>";
      } else if (order.status === "paid") action = "<button class='button compact' data-code='" + order.id + "'>Code per E-Mail senden</button>";
      var receipt = order.status === "paid" ? "<a class='button compact' href='/api/orders/" + encodeURIComponent(order.id) + "/receipt.pdf'>PDF</a>" : "–";
      return "<tr><td>" + escapeHtml(new Date(order.created_at + "Z").toLocaleDateString("de-CH")) + "</td><td>" + escapeHtml(order.plant_name) + "</td><td>" + count + "</td><td>" + escapeHtml(money.format(order.amount_total / 100)) + "</td><td><span class='status " + (order.status === "paid" ? "available" : "review") + "'>" + escapeHtml(labels[order.status] || order.status) + "</span></td><td class='code-cell'>" + action + "</td><td>" + receipt + "</td></tr>";
    }).join("") : "<tr><td colspan='7'>Noch keine Bestellungen in dieser Organisation.</td></tr>";
  }

  function selectedPlant(selectId) {
    return state.plants.find(function (plant) { return plant.id === byId(selectId).value && plant.manager_variant !== "billing_manager"; })
      || state.plants.find(function (plant) { return plant.manager_variant !== "billing_manager"; })
      || null;
  }

  function plantRecommendation(plant) {
    if (!plant || !plant.recommendation_json) return null;
    try { return JSON.parse(plant.recommendation_json); } catch (_) { return null; }
  }

  function entitlementTime(value) {
    return value ? Date.parse(String(value).replace(" ", "T") + "Z") : null;
  }

  function entitlementIsActive(entitlement) {
    var now = Date.now();
    var from = entitlementTime(entitlement.valid_from);
    var until = entitlementTime(entitlement.valid_until);
    return entitlement.status === "active" && (!from || from <= now) && (!until || until > now);
  }

  function paidLicenseSummary(plantId) {
    var summary = {};
    state.orders.filter(function (order) {
      return order.plant_id === plantId && order.status === "paid";
    }).forEach(function (order) {
      (order.entitlements || []).filter(entitlementIsActive).forEach(function (entitlement) {
        summary[entitlement.catalog_key] = Number(summary[entitlement.catalog_key] || 0) + Number(entitlement.quantity || 0);
      });
    });
    return summary;
  }

  function latestEntitlementUntil(plantId, catalogKey) {
    var values = [];
    state.orders.filter(function (order) {
      return order.plant_id === plantId && order.status === "paid";
    }).forEach(function (order) {
      (order.entitlements || []).forEach(function (entitlement) {
        if (entitlement.catalog_key === catalogKey && entitlement.valid_until) values.push(entitlement.valid_until);
      });
    });
    return values.sort().at(-1) || null;
  }

  function paidSetupSummary(plantId) {
    var summary = {};
    state.orders.filter(function (order) {
      return order.plant_id === plantId && order.status === "paid";
    }).forEach(function (order) {
      (order.lines || []).forEach(function (line) {
        if (line.line_type !== "setup") return;
        summary[line.catalog_key] = Number(summary[line.catalog_key] || 0) + Number(line.quantity || 0);
      });
    });
    return summary;
  }

  function paidManagerVariant(plant) {
    var managerKeys = [];
    state.orders.filter(function (order) {
      return order.plant_id === plant.id && order.status === "paid";
    }).forEach(function (order) {
      (order.lines || []).forEach(function (line) {
        if (line.line_type === "license" && ["manager_standard", "manager_peak"].includes(line.catalog_key)) managerKeys.push(line.catalog_key);
      });
    });
    if (managerKeys.includes("manager_peak")) return "manager_peak";
    if (managerKeys.includes("manager_standard")) return "manager_standard";
    return null;
  }

  function currentManagerVariant(plant) {
    return paidManagerVariant(plant) || plantRecommendation(plant)?.managerVariant || plant.manager_variant || "manager_standard";
  }

  function selectedManagerVariant(plant) {
    var ownedManager = paidManagerVariant(plant);
    if (!ownedManager) return plantRecommendation(plant)?.managerVariant || plant.manager_variant || "manager_standard";
    if (ownedManager === "manager_standard" && byId("peakUpgrade").checked) return "manager_peak";
    return ownedManager;
  }

  function licenseCoverage(requested, owned) {
    var coverage = Object.assign({}, owned);
    var spareConsumers = Math.max(0, Number(owned.consumer_single || 0) - Number(requested.consumer_single || 0));
    coverage.heat_pump = Number(owned.heat_pump || 0) + Math.min(spareConsumers,
      Math.max(0, Number(requested.heat_pump || 0) - Number(owned.heat_pump || 0)));
    return coverage;
  }

  function prepareOrderEditor(configurationId) {
    var plant = selectedPlant("orderPlant");
    if (!plant) return;
    var configurationPurchase = Boolean(configurationId);
    state.checkoutConfigurationId = configurationPurchase ? configurationId : null;
    var recommendation = plantRecommendation(plant);
    var owned = paidLicenseSummary(plant.id);
    var setupOwned = paidSetupSummary(plant.id);
    var coverage = licenseCoverage(recommendation?.modules || {}, owned);
    var ownedManager = paidManagerVariant(plant);
    var desiredManager = recommendation?.managerVariant || plant.manager_variant || "manager_standard";
    byId("managerCurrentName").textContent = ownedManager ? managerLabel(ownedManager) : managerLabel(desiredManager);
    byId("ownedManager").textContent = ownedManager ? "Bereits gekauft" : "Wird beim Erstkauf einmalig berechnet";
    byId("peakUpgradeOption").classList.toggle("hidden", ownedManager !== "manager_standard");
    byId("peakUpgrade").checked = ownedManager === "manager_standard" && desiredManager === "manager_peak";
    byId("peakUpgrade").disabled = configurationPurchase;
    document.querySelectorAll(".module-row").forEach(function (row) {
      var recommendedQuantity = recommendation ? Number(recommendation.modules[row.dataset.key] || 0) : 0;
      var ownedQuantity = Number(owned[row.dataset.key] || 0);
      var licenseQuantity = Math.max(0, recommendedQuantity - Number(coverage[row.dataset.key] || 0));
      var setupQuantity = configurationPurchase
        ? Math.max(0, recommendedQuantity - Number(setupOwned[row.dataset.key] || 0))
        : 0;
      var quantity = Math.max(licenseQuantity, setupQuantity);
      row.dataset.licenseQuantity = String(licenseQuantity);
      row.dataset.setupQuantity = String(setupQuantity);
      var validUntil = latestEntitlementUntil(plant.id, row.dataset.key);
      var ownedLabel = row.querySelector(".owned-count");
      ownedLabel.textContent = Number(row.dataset.termMonths || 0) > 0
        ? (validUntil ? "Gültig bis " + new Date(entitlementTime(validUntil)).toLocaleDateString("de-CH") : "Nicht aktiviert")
        : "Vorhanden: " + ownedQuantity;
      row.querySelector(".module-check").checked = configurationPurchase
        ? quantity > 0
        : licenseQuantity > 0;
      row.querySelector(".qty").value = quantity > 0 ? quantity : 1;
      row.querySelector(".module-check").disabled = configurationPurchase;
      row.querySelector(".qty").disabled = configurationPurchase;
    });
    updateOrder();
  }

  function updateOrder() {
    var plant = selectedPlant("orderPlant");
    if (!plant) return;
    var configurationPurchase = Boolean(state.checkoutConfigurationId);
    var ownedManager = paidManagerVariant(plant);
    var setupOwned = paidSetupSummary(plant.id);
    var targetManager = selectedManagerVariant(plant);
    var managerItem = null;
    if (!ownedManager) managerItem = managerPrices[targetManager] || managerPrices.manager_standard;
    else if (ownedManager === "manager_standard" && targetManager === "manager_peak") managerItem = managerPrices.manager_peak_upgrade;

    var managerSetupPaid = Number(setupOwned.manager_standard || 0) > 0
      || Number(setupOwned.manager_peak || 0) > 0;
    var managerSetupPrice = configurationPurchase && !managerSetupPaid
      ? (managerPrices[targetManager] || managerPrices.manager_standard).setup
      : 0;
    byId("managerPrice").textContent = managerItem ? money.format(managerItem.price) : money.format(0);
    byId("managerSetup").textContent = configurationPurchase
      ? (managerSetupPrice > 0
        ? "Generator / Ersteinrichtung " + money.format(managerSetupPrice)
        : "Ersteinrichtung bereits bezahlt")
      : (managerItem ? "Nur Lizenz" : "Kein weiterer Managerkauf");

    state.selectedOrder = [];
    document.querySelectorAll(".module-row").forEach(function (row) {
      var quantity = Math.min(999, Math.max(1, Number(row.querySelector(".qty").value) || 1));
      row.querySelector(".qty").value = quantity;
      var licenseQuantity = configurationPurchase
        ? Number(row.dataset.licenseQuantity || 0)
        : (row.querySelector(".module-check").checked ? quantity : 0);
      var setupQuantity = configurationPurchase
        ? Number(row.dataset.setupQuantity || 0)
        : 0;
      if (licenseQuantity > 0 || setupQuantity > 0) {
        state.selectedOrder.push({
          key: row.dataset.key,
          name: row.dataset.name,
          price: Number(row.dataset.price),
          setup: Number(row.dataset.setup),
          licenseQuantity: licenseQuantity,
          setupQuantity: setupQuantity
        });
      }
    });

    var managerLicensePrice = managerItem ? managerItem.price : 0;
    var licensePrice = managerLicensePrice + state.selectedOrder.reduce(function (sum, item) {
      return sum + item.price * item.licenseQuantity;
    }, 0);
    var setupPrice = managerSetupPrice + state.selectedOrder.reduce(function (sum, item) {
      return sum + item.setup * item.setupQuantity;
    }, 0);
    var items = [];
    if (managerItem) items.push({ name: managerItem.name, quantity: 1, total: managerItem.price });
    state.selectedOrder.forEach(function (item) {
      if (item.licenseQuantity > 0) {
        items.push({ name: item.name, quantity: item.licenseQuantity, total: item.price * item.licenseQuantity });
      }
    });
    if (managerSetupPrice > 0) {
      items.push({ name: "Generator / Ersteinrichtung Manager", quantity: 1, total: managerSetupPrice });
    }
    state.selectedOrder.forEach(function (item) {
      if (item.setupQuantity > 0) {
        items.push({
          name: "Generator / Ersteinrichtung " + item.name,
          quantity: item.setupQuantity,
          total: item.setup * item.setupQuantity
        });
      }
    });
    byId("orderItems").innerHTML = items.length
      ? items.map(function (item) { return "<div class='order-item'><span>" + escapeHtml(item.name) + " × " + item.quantity + "</span><strong>" + money.format(item.total) + "</strong></div>"; }).join("")
      : "<p>Keine zusätzliche Lizenz oder Ersteinrichtung erforderlich.</p>";
    var netTotal = licensePrice + setupPrice;
    var vatTotal = Math.round(netTotal * state.vatRate) / 100;
    byId("moduleTotal").textContent = money.format(licensePrice);
    byId("setupTotal").textContent = money.format(setupPrice);
    byId("setupTotalRow").classList.toggle("hidden", !configurationPurchase);
    byId("netTotal").textContent = money.format(netTotal);
    byId("vatTotal").textContent = money.format(vatTotal);
    byId("grandTotal").textContent = money.format(netTotal + vatTotal);
    var canCheckout = state.session.organization.type === "personal" || ["owner", "admin", "billing"].includes(state.session.organization.role);
    var checkoutButton = byId("checkoutButton");
    var freeOrder = netTotal === 0 && items.length > 0;
    checkoutButton.dataset.free = freeOrder ? "true" : "false";
    checkoutButton.textContent = freeOrder ? "Kostenlos freischalten" : "Mit Stripe bezahlen";
    checkoutButton.disabled = (!state.stripeConfigured && !freeOrder) || !canCheckout || items.length === 0;
  }

  var forecastSeriesLabels = {
    PV: "PV-Messwert",
    Hausverbrauch: "Verbrauchsmesswert",
    Netzleistung: "Netzmesswert",
    SOC: "Batterie-SOC",
    prog_var_1: "PV-Prognose · Modell 1",
    prog_var_2: "Verbrauchsprognose · Modell 2",
    prog_var_3: "Netzfahrplan · Modell 3 (+ Bezug / − Einspeisung)",
    prog_var_3_battery: "Batterieplan · Modell 3 (+ Laden / − Entladen)",
    prog_var_10: "PV-Prognose · Modell 10",
    prog_var_11: "Verbrauchsprognose · Modell 11",
    prog_var_13: "Netzfahrplan · Modell 13 (+ Bezug / − Einspeisung)",
    prog_var_13_battery: "Batterieplan · Modell 13 (+ Laden / − Entladen)",
    prog_var_21: "PV-Prognose · Modell 21",
    prog_var_22: "Verbrauchsprognose · Modell 22",
    prog_var_23: "Netzfahrplan · Modell 23 (+ Bezug / − Einspeisung)",
    prog_var_23_battery: "Batterieplan · Modell 23 (+ Laden / − Entladen)"
  };
  var forecastColors = {
    PV: "#006b62",
    prog_var_1: "#2a9d8f",
    prog_var_10: "#62bbb0",
    prog_var_21: "#98d7cf",
    Hausverbrauch: "#b93242",
    prog_var_2: "#dd5a68",
    prog_var_11: "#ea8d98",
    prog_var_22: "#f2bcc2",
    Netzleistung: "#2f6ecb",
    prog_var_3: "#5a8ce0",
    prog_var_13: "#86adeb",
    prog_var_23: "#b2caf2",
    prog_var_3_battery: "#8c4b78",
    prog_var_13_battery: "#a96b91",
    prog_var_23_battery: "#c38eac",
    SOC: "#d68a00"
  };
  var forecastFamilies = [
    { pv: "prog_var_1", load: "prog_var_2", schedule: "prog_var_3" },
    { pv: "prog_var_10", load: "prog_var_11", schedule: "prog_var_13" },
    { pv: "prog_var_21", load: "prog_var_22", schedule: "prog_var_23" }
  ];

  function forecastSeriesLabel(key) {
    return forecastSeriesLabels[key] || key;
  }

  function forecastSeriesColor(key) {
    return forecastColors[key] || "#7b8784";
  }

  function forecastDefaultVisibleSeries(result) {
    var available = new Set(((result && result.series) || []).map(function (entry) { return entry.key; }));
    var schedule = (result && result.scheduleSourceModel)
      || ["prog_var_3", "prog_var_13", "prog_var_23"].find(function (key) { return available.has(key); })
      || "prog_var_3";
    var family = forecastFamilies.find(function (entry) { return entry.schedule === schedule; })
      || forecastFamilies[0];
    return new Set([
      "PV",
      "Hausverbrauch",
      "Netzleistung",
      "SOC",
      family.pv,
      family.load,
      schedule,
      schedule + "_battery"
    ]);
  }

  function forecastInputValue(timestamp) {
    var date = new Date(timestamp);
    if (Number.isNaN(date.getTime())) return "";
    var local = new Date(date.getTime() - date.getTimezoneOffset() * 60000);
    return local.toISOString().slice(0, 16);
  }

  function forecastWindowLabel(start, end) {
    var hours = Math.max(0, Math.round((end - start) / 3600000));
    if (hours >= 48 && hours % 24 === 0) return (hours / 24) + " Tage";
    return hours + " h";
  }

  function formatForecastHoverDate(value) {
    var date = new Date(value);
    if (Number.isNaN(date.getTime())) return "-";
    return new Intl.DateTimeFormat("de-CH", { day: "2-digit", month: "2-digit", year: "numeric", hour: "2-digit", minute: "2-digit" }).format(date);
  }

  function formatForecastHoverValue(key, value) {
    var number = Number(value);
    if (!Number.isFinite(number)) return "-";
    if (key === "SOC") return number.toLocaleString("de-CH", { minimumFractionDigits: 1, maximumFractionDigits: 1 }) + " %";
    return number.toLocaleString("de-CH", { maximumFractionDigits: 0 }) + " W";
  }

  function attachForecastHover(series, minTime, maxTime, width, height, padding) {
    var chart = byId("forecastChart");
    var tooltip = byId("forecastTooltip");
    chart.onpointermove = function (event) {
      var rect = chart.getBoundingClientRect();
      var sx = (event.clientX - rect.left) / rect.width * width;
      if (sx < padding.left || sx > width - padding.right) {
        tooltip.classList.add("hidden");
        var outsideLine = byId("forecastHoverLine");
        if (outsideLine) outsideLine.classList.add("hidden");
        return;
      }
      var time = minTime + (sx - padding.left) / (width - padding.left - padding.right) * (maxTime - minTime);
      var tolerance = Math.max(30, Number(state.forecastResult && state.forecastResult.intervalMinutes) || 15) * 60 * 1000 * 1.6;
      var rows = series.map(function (entry) {
        var nearest = null;
        entry.points.forEach(function (point) {
          var pt = Date.parse(point.time), value = Number(point.value);
          if (!Number.isFinite(pt) || !Number.isFinite(value)) return;
          if (!nearest || Math.abs(pt - time) < Math.abs(nearest.time - time)) nearest = { time: pt, value: value };
        });
        return nearest && Math.abs(nearest.time - time) <= tolerance ? { key: entry.key, time: nearest.time, value: nearest.value } : null;
      }).filter(Boolean);
      if (!rows.length) return;
      var referenceTime = rows.reduce(function (best, row) { return Math.abs(row.time - time) < Math.abs(best - time) ? row.time : best; }, rows[0].time);
      tooltip.innerHTML = "<strong>" + escapeHtml(formatForecastHoverDate(referenceTime)) + "</strong>" + rows.map(function (row) {
        return "<span><i style='--series-color:" + forecastSeriesColor(row.key) + "'></i><b>" + escapeHtml(forecastSeriesLabel(row.key)) + "</b><em>" + escapeHtml(formatForecastHoverValue(row.key, row.value)) + "</em></span>";
      }).join("");
      tooltip.classList.remove("hidden");
      tooltip.style.left = Math.min(Math.max(event.clientX - rect.left + 14, 8), rect.width - tooltip.offsetWidth - 8) + "px";
      tooltip.style.top = Math.min(Math.max(event.clientY - rect.top + 14, 8), rect.height - tooltip.offsetHeight - 8) + "px";
      var line = byId("forecastHoverLine");
      if (line) { line.setAttribute("x1", sx); line.setAttribute("x2", sx); line.classList.remove("hidden"); }
    };
    chart.onpointerleave = function () {
      tooltip.classList.add("hidden");
      var line = byId("forecastHoverLine");
      if (line) line.classList.add("hidden");
    };
  }

  function formatForecastDate(value) {
    var date = value ? new Date(value) : null;
    if (!date || Number.isNaN(date.getTime())) return "–";
    return new Intl.DateTimeFormat("de-CH", {
      day: "2-digit", month: "2-digit", hour: "2-digit", minute: "2-digit"
    }).format(date);
  }

  function setForecastState(message) {
    byId("forecastState").textContent = message;
    byId("forecastState").classList.remove("hidden");
    byId("forecastChart").classList.add("hidden");
  }

  function resetForecastChart() {
    byId("forecastChart").innerHTML = "";
    byId("forecastChart").classList.add("hidden");
    byId("forecastSeriesControls").innerHTML = "";
    byId("forecastLegend").innerHTML = "";
    byId("forecastLegend").classList.add("hidden");
    byId("forecastTooltip").classList.add("hidden");
    byId("forecastLastUpdated").textContent = "–";
    byId("forecastSeriesCount").textContent = "0";
    byId("forecastQualityStatus").className = "status review";
    byId("forecastQualityStatus").textContent = "Aufbauphase";
    byId("forecastQualityState").textContent = "Qualitätswerte werden gesammelt. Aussagekräftige Vergleiche entstehen mit wachsender Datenhistorie.";
    byId("forecastQualityState").classList.remove("hidden");
    byId("forecastQualityTable").classList.add("hidden");
    byId("forecastQualityBody").innerHTML = "";
    byId("forecastConfigSection").classList.add("hidden");
    byId("forecastConfigError").textContent = "";
  }

  function renderForecastLicenseWarning(plant) {
    var warning = byId("forecastOfflineWarning");
    var lastSeen = plant.license_last_seen_at
      ? new Date(String(plant.license_last_seen_at).replace(" ", "T") + "Z")
      : null;
    var now = Date.now();
    var refreshDue = lastSeen ? lastSeen.getTime() + 24 * 60 * 60 * 1000 : 0;
    var offlineUntil = lastSeen ? lastSeen.getTime() + 14 * 24 * 60 * 60 * 1000 : 0;
    var showOffline = Boolean(plant.installation_id && lastSeen && !Number.isNaN(lastSeen.getTime()) && now > refreshDue);
    warning.classList.toggle("hidden", !showOffline);
    if (!showOffline) return;

    var remainingDays = Math.max(0, Math.ceil((offlineUntil - now) / (24 * 60 * 60 * 1000)));
    byId("forecastOfflineTitle").textContent = remainingDays > 0
      ? "Kein Internet am Manager erkannt"
      : "Offline-Freigabe abgelaufen";
    byId("forecastOfflineText").textContent = remainingDays > 0
      ? "Die lokale Lizenzfreigabe läuft in " + remainingDays + " " + (remainingDays === 1 ? "Tag" : "Tagen") + " ab, falls keine Verbindung zum Lizenzserver hergestellt wird."
      : "Der Manager benötigt eine Internetverbindung für eine neue Lizenzprüfung.";
  }

  function formatForecastMetric(value, digits, suffix) {
    if (value === null || value === undefined || value === "") return "–";
    var number = Number(value);
    if (!Number.isFinite(number)) return "–";
    return number.toLocaleString("de-CH", {
      minimumFractionDigits: digits,
      maximumFractionDigits: digits
    }) + (suffix || "");
  }

  function renderForecastQuality(quality, capabilities) {
    var available = quality && Array.isArray(quality.series)
      ? quality.series.filter(function (entry) {
        return entry && entry.key && Number(entry.samples) > 0;
      })
      : [];
    var byKey = new Map(available.map(function (entry) { return [entry.key, entry]; }));
    var rows = [];
    var addPreferred = function (keys) {
      var candidates = keys.map(function (key) { return byKey.get(key); }).filter(Boolean);
      candidates.sort(function (left, right) {
        var a = Number.isFinite(Number(left.r2)) ? Number(left.r2) : -Infinity;
        var b = Number.isFinite(Number(right.r2)) ? Number(right.r2) : -Infinity;
        return b - a;
      });
      if (candidates.length) rows.push(candidates[0]);
    };
    if (capabilities && capabilities.pv) addPreferred(["prog_var_1", "prog_var_10", "prog_var_21"]);
    if (capabilities && capabilities.load) addPreferred(["prog_var_2", "prog_var_11", "prog_var_22"]);
    var status = byId("forecastQualityStatus");

    if (!rows.length) {
      status.className = "status review";
      status.textContent = "Aufbauphase";
      byId("forecastQualityState").textContent = "Qualitätswerte werden gesammelt. Aussagekräftige Vergleiche entstehen mit wachsender Datenhistorie.";
      byId("forecastQualityState").classList.remove("hidden");
      byId("forecastQualityTable").classList.add("hidden");
      byId("forecastQualityBody").innerHTML = "";
      return;
    }

    var mature = rows.length > 0
      && rows.every(function (entry) { return Number(entry.samples) >= 2016; });
    status.className = mature ? "status available" : "status review";
    status.textContent = mature ? "Vergleich bereit" : "Aufbauphase";
    byId("forecastQualityBody").innerHTML = rows.map(function (entry) {
      var target = entry.target === "PV" ? "PV" : "Verbrauch";
      return "<tr>"
        + "<td><strong>" + escapeHtml(forecastSeriesLabel(entry.key)) + "</strong></td>"
        + "<td>" + escapeHtml(target) + "</td>"
        + "<td>" + formatForecastMetric(entry.r2, 3, "") + "</td>"
        + "<td>" + formatForecastMetric(entry.mae, 0, " W") + "</td>"
        + "<td>" + formatForecastMetric(entry.rmse, 0, " W") + "</td>"
        + "<td>" + Number(entry.samples).toLocaleString("de-CH") + "</td>"
        + "</tr>";
    }).join("");
    byId("forecastQualityState").classList.add("hidden");
    byId("forecastQualityTable").classList.remove("hidden");
  }

  function renderForecastResult(result) {
    state.forecastResult = result;
    if (!state.forecastVisibleSeries) state.forecastVisibleSeries = forecastDefaultVisibleSeries(result);
    byId("forecastLastUpdated").textContent = formatForecastDate(result.generatedAt);
    byId("forecastSeriesCount").textContent = String((result.series || []).length);
    renderForecastQuality(result.quality, result.forecastCapabilities || {
      pv: true,
      load: true,
      schedule: true
    });
    if (result.status === "license_required") {
      byId("forecastApiStatus").textContent = "Keine aktive Prognoselizenz";
      return setForecastState("Für dieses System ist eine aktive Prognoselizenz erforderlich.");
    }
    if (result.status === "not_connected") {
      byId("forecastApiStatus").textContent = "Manager noch nicht verbunden";
      return setForecastState("Verbinde den Manager zuerst mit dem Lizenzcode dieses Systems.");
    }
    if (result.status === "no_data") {
      byId("forecastApiStatus").textContent = "Verbindung bereit, noch keine Daten";
      return setForecastState("Für dieses System liegen im gewählten Zeitfenster noch keine Prognosedaten vor.");
    }
    byId("forecastApiStatus").textContent = result.configured
      ? "Prognose aktiv"
      : "Daten empfangen, Konfiguration offen";
    renderForecastChart(result.series || []);
  }

  function renderForecastChart(inputSeries) {
    var priority = [
      "PV", "Hausverbrauch", "Netzleistung", "SOC",
      "prog_var_1", "prog_var_2", "prog_var_3", "prog_var_3_battery",
      "prog_var_10", "prog_var_11", "prog_var_13", "prog_var_13_battery",
      "prog_var_21", "prog_var_22", "prog_var_23", "prog_var_23_battery"
    ];
    var availableSeries = inputSeries.filter(function (entry) {
      return entry && Array.isArray(entry.points) && entry.points.length;
    }).sort(function (left, right) {
      var a = priority.indexOf(left.key);
      var b = priority.indexOf(right.key);
      return (a < 0 ? 99 : a) - (b < 0 ? 99 : b);
    });
    var availablePoints = [];
    availableSeries.forEach(function (entry) {
      entry.points.forEach(function (point) {
        var time = Date.parse(point.time);
        var value = Number(point.value);
        if (Number.isFinite(time) && Number.isFinite(value)) availablePoints.push({ time: time, value: value });
      });
    });
    if (!availablePoints.length) return setForecastState("Keine darstellbaren Prognosedaten vorhanden.");

    var availableMin = Math.min.apply(null, availablePoints.map(function (point) { return point.time; }));
    var availableMax = Math.max.apply(null, availablePoints.map(function (point) { return point.time; }));
    if (!Number.isFinite(state.forecastRangeStart) || state.forecastRangeStart < availableMin || state.forecastRangeStart >= availableMax) {
      state.forecastRangeStart = availableMin;
    }
    if (!Number.isFinite(state.forecastRangeEnd) || state.forecastRangeEnd > availableMax || state.forecastRangeEnd <= availableMin) {
      state.forecastRangeEnd = availableMax;
    }
    if (state.forecastRangeStart >= state.forecastRangeEnd) {
      state.forecastRangeStart = availableMin;
      state.forecastRangeEnd = availableMax;
    }

    var startInput = byId("forecastRangeStart");
    var endInput = byId("forecastRangeEnd");
    startInput.min = forecastInputValue(availableMin);
    startInput.max = forecastInputValue(availableMax);
    endInput.min = forecastInputValue(availableMin);
    endInput.max = forecastInputValue(availableMax);
    startInput.value = forecastInputValue(state.forecastRangeStart);
    endInput.value = forecastInputValue(state.forecastRangeEnd);
    byId("forecastWindowValue").textContent = forecastWindowLabel(state.forecastRangeStart, state.forecastRangeEnd);

    if (!state.forecastVisibleSeries) {
      state.forecastVisibleSeries = forecastDefaultVisibleSeries(state.forecastResult || {});
    }
    byId("forecastSeriesControls").innerHTML = availableSeries.map(function (entry) {
      var checked = state.forecastVisibleSeries.has(entry.key) ? " checked" : "";
      var prediction = entry.key.indexOf("prog_var_") === 0 ? " prediction" : "";
      var activeSchedule = state.forecastResult && state.forecastResult.scheduleSourceModel === entry.key ? " · aktiv" : "";
      return "<label class='forecast-series-option'><input type='checkbox' data-forecast-series='" + escapeHtml(entry.key) + "'" + checked + "><i class='" + prediction + "' style='--series-color:" + forecastSeriesColor(entry.key) + "'></i><span>" + escapeHtml(forecastSeriesLabel(entry.key) + activeSchedule) + "</span></label>";
    }).join("");

    var series = availableSeries.filter(function (entry) {
      return state.forecastVisibleSeries.has(entry.key);
    }).map(function (entry) {
      return {
        key: entry.key,
        points: entry.points.filter(function (point) {
          var time = Date.parse(point.time);
          return Number.isFinite(time) && time >= state.forecastRangeStart && time <= state.forecastRangeEnd;
        })
      };
    }).filter(function (entry) { return entry.points.length; });

    var legend = byId("forecastLegend");
    legend.innerHTML = series.map(function (entry) {
      var prediction = entry.key.indexOf("prog_var_") === 0 ? " prediction" : "";
      var activeSchedule = state.forecastResult && state.forecastResult.scheduleSourceModel === entry.key ? " · aktiv" : "";
      return "<span class='forecast-chart-legend-item'><i class='" + prediction + "' style='--series-color:" + forecastSeriesColor(entry.key) + "'></i><span>" + escapeHtml(forecastSeriesLabel(entry.key) + activeSchedule) + "</span></span>";
    }).join("");
    legend.classList.toggle("hidden", !series.length);

    byId("forecastSeriesCount").textContent = String(series.length);
    if (!series.length) return setForecastState("Im gewählten Zeitfenster sind für die eingeblendeten Reihen keine Daten vorhanden.");

    var allPoints = [];
    series.forEach(function (entry) {
      entry.points.forEach(function (point) {
        var time = Date.parse(point.time);
        var value = Number(point.value);
        if (Number.isFinite(time) && Number.isFinite(value)) allPoints.push({ time: time, value: value });
      });
    });
    if (!allPoints.length) return setForecastState("Im gewählten Zeitfenster sind keine darstellbaren Daten vorhanden.");

    var width = 960;
    var height = 320;
    var padding = { left: 62, right: 24, top: 22, bottom: 42 };
    var minTime = state.forecastRangeStart;
    var maxTime = state.forecastRangeEnd;
    var minValue = Math.min(0, Math.min.apply(null, allPoints.map(function (point) { return point.value; })));
    var maxValue = Math.max(0, Math.max.apply(null, allPoints.map(function (point) { return point.value; })));
    if (maxTime === minTime) maxTime += 1;
    if (maxValue === minValue) maxValue += 1;
    var x = function (time) { return padding.left + (time - minTime) / (maxTime - minTime) * (width - padding.left - padding.right); };
    var y = function (value) { return padding.top + (maxValue - value) / (maxValue - minValue) * (height - padding.top - padding.bottom); };
    var svg = [];

    for (var grid = 0; grid <= 4; grid += 1) {
      var gy = padding.top + grid / 4 * (height - padding.top - padding.bottom);
      var label = maxValue - grid / 4 * (maxValue - minValue);
      svg.push("<line class='forecast-grid-line' x1='" + padding.left + "' y1='" + gy + "' x2='" + (width - padding.right) + "' y2='" + gy + "' />");
      svg.push("<text class='forecast-axis-label' x='" + (padding.left - 10) + "' y='" + (gy + 4) + "' text-anchor='end'>" + label.toFixed(1) + "</text>");
    }

    var now = Date.now();
    if (now >= minTime && now <= maxTime) {
      var nowX = x(now);
      svg.push("<line class='forecast-now-line' x1='" + nowX + "' y1='" + padding.top + "' x2='" + nowX + "' y2='" + (height - padding.bottom) + "' />");
      svg.push("<text class='forecast-now-label' x='" + (nowX + 6) + "' y='" + (padding.top + 13) + "'>Jetzt</text>");
    }

    series.forEach(function (entry) {
      var coordinates = entry.points.map(function (point) {
        return { time: Date.parse(point.time), value: Number(point.value) };
      }).filter(function (point) {
        return Number.isFinite(point.time) && Number.isFinite(point.value);
      }).sort(function (a, b) { return a.time - b.time; }).map(function (point) {
        return x(point.time).toFixed(2) + "," + y(point.value).toFixed(2);
      }).join(" ");
      var lineClass = entry.key.indexOf("prog_var_") === 0
        ? "forecast-series-line forecast-series-prediction"
        : "forecast-series-line";
      svg.push("<polyline class='" + lineClass + "' vector-effect='non-scaling-stroke' fill='none' stroke='" + forecastSeriesColor(entry.key) + "' points='" + coordinates + "' />");
    });

    svg.push("<line id='forecastHoverLine' class='forecast-hover-line hidden' x1='0' y1='" + padding.top + "' x2='0' y2='" + (height - padding.bottom) + "' />");
    svg.push("<text class='forecast-axis-label' x='" + padding.left + "' y='" + (height - 12) + "'>" + formatForecastDate(minTime) + "</text>");
    svg.push("<text class='forecast-axis-label' x='" + (width - padding.right) + "' y='" + (height - 12) + "' text-anchor='end'>" + formatForecastDate(maxTime) + "</text>");
    byId("forecastChart").innerHTML = svg.join("");
    byId("forecastState").classList.add("hidden");
    byId("forecastChart").classList.remove("hidden");
    attachForecastHover(series, minTime, maxTime, width, height, padding);
  }

  var forecastCapabilityVariants = {
    forecast_pv: [1, 10, 21],
    forecast_load: [2, 11, 22],
    grid_schedule: [3, 13, 23]
  };
  var customTariff = "Preis selber eingeben";
  var forecastTariffs = {
    import: {
      dynamisch: [
        { id: "CKW Dynamisch Home", label: "CKW Netz Home dynamic (ab 2027)", fallback: 0.2467 },
        { id: "CKW Dynamisch Business", label: "CKW Netz Business dynamic (ab 2027)", fallback: 0.2467 },
        { id: "BKW Sonne scheint", label: "BKW Sonne scheint (ab 2027)", fallback: 0.256 },
        { id: "EWN MarktStrom Spot", label: "EWN MarktStrom Spot", fallback: 0.1715 },
        { id: "EWO MarktStrom Spot", label: "EWO MarktStrom Spot", fallback: 0.2524 }
      ],
      statisch: [
        { id: "CKW ClassicStrom 2027", price: 0.2467 },
        { id: "BKW Energy Blue 2027", price: 0.256 },
        { id: "EWN StandardStrom 50 Sommer 2027", price: 0.1715 },
        { id: "EWN StandardStrom 50 Winter 2027", price: 0.1915 },
        { id: "EWN NaturStrom 50 Sommer 2027", price: 0.1815 },
        { id: "EWN NaturStrom 50 Winter 2027", price: 0.2015 },
        { id: "EWO NaturStrom Sommer Normal 2026", price: 0.2524 },
        { id: "EWO NaturStrom Sommer Spar 2026", price: 0.2162 },
        { id: "EWO NaturStrom Winter Normal 2026", price: 0.2851 },
        { id: "EWO NaturStrom Winter Spar 2026", price: 0.2489 },
        { id: customTariff, custom: true }
      ]
    },
    export: {
      dynamisch: [
        { id: "CKW Spotmarkt Einspeisung 2027", fallback: 0.06 },
        { id: "BKW Dynamische Abnahmevergütung 2027", fallback: 0.06 },
        { id: "EWN Referenzmarktpreis BFE", fallback: 0.06 },
        { id: "EWO Referenzmarktpreis BFE", fallback: 0.06 },
        { id: "Referenzmarktpreis Europa", fallback: 0.06 }
      ],
      statisch: [
        { id: "Mindestvergütung bis 30 kWp 2027", price: 0.06 },
        { id: customTariff, custom: true }
      ]
    }
  };

  function tariffOptions(direction, mode) {
    return (forecastTariffs[direction] && forecastTariffs[direction][mode]) || [];
  }

  function tariffMode(direction, selected, configured) {
    if (configured === "dynamisch" || configured === "statisch") return configured;
    return tariffOptions(direction, "dynamisch").some(function (item) { return item.id === selected; })
      ? "dynamisch" : "statisch";
  }

  function renderTariffSelector(form, direction, configuredMode, configuredTariff, configuredPrice, preserveConfiguredPrice) {
    var prefix = direction === "import" ? "bezug" : "einspeisung";
    var mode = tariffMode(direction, configuredTariff, configuredMode);
    var modeField = form.elements["tarif_" + prefix + "_modus"];
    var tariffField = form.elements["tarif_" + prefix];
    var priceField = form.elements["tarif_" + prefix + "_fest"];
    var options = tariffOptions(direction, mode);
    var selected = options.find(function (item) { return item.id === configuredTariff; }) || options[0];
    modeField.value = mode;
    tariffField.innerHTML = options.map(function (item) {
      return "<option value='" + escapeHtml(item.id) + "'>" + escapeHtml(item.label || item.id) + "</option>";
    }).join("");
    tariffField.value = selected.id;
    var configuredNumber = Number(configuredPrice);
    var catalogPrice = selected.price === undefined ? selected.fallback : selected.price;
    var price = preserveConfiguredPrice && Number.isFinite(configuredNumber)
      ? configuredNumber
      : (catalogPrice === undefined ? configuredPrice : catalogPrice);
    priceField.value = forecastNumber(price, direction === "import" ? 0.3 : 0.1);
    var priceLabel = form.querySelector("[data-tariff-custom='" + direction + "']");
    var usesFixedPrice = mode === "statisch";
    priceLabel.classList.toggle("hidden", !usesFixedPrice);
    priceField.disabled = !usesFixedPrice;
    priceField.required = usesFixedPrice;
  }

  function refreshTariffSelector(form, direction) {
    var prefix = direction === "import" ? "bezug" : "einspeisung";
    renderTariffSelector(
      form,
      direction,
      form.elements["tarif_" + prefix + "_modus"].value,
      form.elements["tarif_" + prefix].value,
      form.elements["tarif_" + prefix + "_fest"].value,
      false
    );
  }

  function forecastNumber(value, fallback) {
    var number = Number(value);
    return Number.isFinite(number) ? number : fallback;
  }

  function topologyNumber(value, unit) {
    return forecastNumber(value, 0).toLocaleString("de-CH", { maximumFractionDigits: 3 }) + " " + unit;
  }

  function topologyRows(title, items, describe) {
    return "<section class='forecast-topology-group'><h4>" + escapeHtml(title) + "</h4>"
      + (items.length ? items.map(function (item) {
        return "<div><strong>" + escapeHtml(item.name || item.id) + "</strong><span>"
          + escapeHtml(describe(item)) + "</span></div>";
      }).join("") : "<p>Keine Komponenten</p>")
      + "</section>";
  }

  function renderForecastTopology(topology) {
    var block = byId("forecastTopologyBlock");
    if (!topology) {
      block.classList.add("hidden");
      byId("forecastTopology").innerHTML = "";
      return;
    }
    var summary = topology.summary || {};
    var inverterTypes = { pv: "PV", battery: "Batterie", hybrid: "Hybrid" };
    var couplingTypes = { ac: "AC-gekoppelt", dc: "DC-gekoppelt", hybrid: "Hybrid" };
    byId("forecastTopology").innerHTML =
      "<div class='forecast-topology-summary'>"
      + "<div><span>PV DC</span><strong>" + topologyNumber(summary.pvDcKwp, "kWp") + "</strong></div>"
      + "<div><span>PV AC</span><strong>" + topologyNumber(summary.pvAcKw, "kW") + "</strong></div>"
      + "<div><span>Batterie nutzbar</span><strong>" + topologyNumber(summary.usableBatteryKwh, "kWh") + "</strong></div>"
      + "<div><span>Laden</span><strong>" + topologyNumber(summary.maxBatteryChargeKw, "kW") + "</strong></div>"
      + "<div><span>Entladen</span><strong>" + topologyNumber(summary.maxBatteryDischargeKw, "kW") + "</strong></div>"
      + "</div><div class='forecast-topology-groups'>"
      + topologyRows("Wechselrichter", topology.inverters || [], function (item) {
        return (inverterTypes[item.type] || item.type) + " · " + topologyNumber(item.acRatedKw, "kW AC");
      })
      + topologyRows("PV-Flächen", topology.pvArrays || [], function (item) {
        return topologyNumber(item.dcKwp, "kWp") + " · " + topologyNumber(item.tiltDeg, "°") + " · Azimut " + forecastNumber(item.azimuthDeg, 0);
      })
      + topologyRows("Batterien", topology.batteries || [], function (item) {
        return topologyNumber(item.usableCapacityKwh, "kWh") + " · " + (couplingTypes[item.coupling] || item.coupling);
      })
      + "</div>";
    block.classList.remove("hidden");
  }

  function renderForecastRoofs(roofs, readOnly) {
    var disabled = readOnly ? " disabled" : "";
    byId("forecastRoofs").innerHTML = (roofs || []).map(function (roof, index) {
      return "<div class='forecast-roof-row' data-roof-index='" + index + "'>"
        + "<label>Leistung kWp<input data-roof-field='kwp' type='number' min='0.1' max='100000' step='0.1' value='" + forecastNumber(roof.kwp, 0) + "' required" + disabled + "></label>"
        + "<label>Neigung °<input data-roof-field='neigung' type='number' min='0' max='90' step='1' value='" + forecastNumber(roof.neigung, 30) + "' required" + disabled + "></label>"
        + "<label>Azimut °<input data-roof-field='azimut' type='number' min='-180' max='360' step='1' value='" + forecastNumber(roof.azimut, 180) + "' required" + disabled + "></label>"
        + "<button class='icon-button' type='button' data-remove-roof aria-label='Dach entfernen'" + disabled + ">×</button>"
        + "</div>";
    }).join("");
  }

  function fillForecastConfiguration(plant, result) {
    var configuration = result.configuration || {};
    var form = byId("forecastConfigForm");
    form.dataset.plantId = plant.id;
    form.elements.standort.value = configuration.standort || plant.location || "";
    form.elements.kanton.value = configuration.kanton || "LU";
    form.elements.ac_leistung.value = forecastNumber(configuration.ac_leistung, 10);
    form.elements.batt_capacity_kwh.value = forecastNumber(configuration.batt_capacity_kwh, 0);
    form.elements.batt_power_kw.value = forecastNumber(configuration.batt_power_kw, 0);
    form.elements.tarif_peak_fest.value = forecastNumber(configuration.tarif_peak_fest, 5);
    renderTariffSelector(form, "import", configuration.tarif_bezug_modus, configuration.tarif_bezug, configuration.tarif_bezug_fest, true);
    renderTariffSelector(form, "export", configuration.tarif_einspeisung_modus, configuration.tarif_einspeisung, configuration.tarif_einspeisung_fest, true);
    Object.entries(forecastCapabilityVariants).forEach(function (entry) {
      var capability = entry[0];
      var variants = entry[1];
      form.elements[capability].checked = variants.some(function (variant) {
        return Boolean(configuration["prog_var_" + variant]);
      });
    });
    var managerOwned = result.technicalSource === "manager" && Boolean(result.topology);
    renderForecastRoofs(configuration.daecher || [], managerOwned);
    renderForecastTopology(result.topology || null);

    var canManage = state.session.organization.type === "personal"
      || ["owner", "admin", "operator"].includes(state.session.organization.role);
    form.querySelectorAll("input, select, button").forEach(function (control) {
      control.disabled = !canManage;
    });
    if (managerOwned) {
      form.querySelectorAll("[data-technical-field]").forEach(function (control) {
        control.disabled = true;
      });
      byId("forecastAddRoof").disabled = true;
      byId("forecastRoofs").querySelectorAll("input, button").forEach(function (control) {
        control.disabled = true;
      });
    }
    var licensed = result.forecastCapabilities || {
      pv: true,
      load: true,
      schedule: true
    };
    [
      ["forecast_pv", "pv"],
      ["forecast_load", "load"],
      ["grid_schedule", "schedule"]
    ].forEach(function (entry) {
      if (!licensed[entry[1]]) {
        form.elements[entry[0]].checked = false;
        form.elements[entry[0]].disabled = true;
      }
    });
    byId("forecastConfigStatus").textContent = managerOwned
      ? "Technik vom Manager"
      : (result.configured ? "Gespeichert" : "Noch nicht gespeichert");
    byId("forecastConfigStatus").className = "status " + (result.configured ? "available" : "review");
    byId("forecastConfigSection").classList.remove("hidden");
  }

  async function loadForecastConfiguration(plant, requestId) {
    try {
      var result = await api("/api/plants/" + plant.id + "/prognosis/configuration");
      if (requestId !== state.forecastRequest) return;
      fillForecastConfiguration(plant, result);
    } catch (error) {
      if (requestId !== state.forecastRequest) return;
      byId("forecastConfigError").textContent = error.message;
      byId("forecastConfigSection").classList.remove("hidden");
    }
  }

  function forecastConfigurationPayload(form) {
    var selected = {
      forecast_pv: form.elements.forecast_pv.checked,
      forecast_load: form.elements.forecast_load.checked,
      grid_schedule: form.elements.grid_schedule.checked
    };
    if (selected.grid_schedule) {
      selected.forecast_pv = true;
      selected.forecast_load = true;
    }
    if (!Object.values(selected).some(Boolean)) {
      throw new Error("Bitte mindestens eine Prognosefunktion aktivieren.");
    }
    var variants = {};
    Object.entries(forecastCapabilityVariants).forEach(function (entry) {
      entry[1].forEach(function (variant) {
        variants["prog_var_" + variant] = selected[entry[0]];
      });
    });
    var roofs = Array.from(byId("forecastRoofs").querySelectorAll(".forecast-roof-row")).map(function (row) {
      return {
        kwp: Number(row.querySelector("[data-roof-field='kwp']").value),
        neigung: Number(row.querySelector("[data-roof-field='neigung']").value),
        azimut: Number(row.querySelector("[data-roof-field='azimut']").value)
      };
    });
    return Object.assign({
      standort: form.elements.standort.value,
      kanton: form.elements.kanton.value,
      ac_leistung: Number(form.elements.ac_leistung.value),
      batt_capacity_kwh: Number(form.elements.batt_capacity_kwh.value),
      batt_power_kw: Number(form.elements.batt_power_kw.value),
      tarif_bezug_modus: form.elements.tarif_bezug_modus.value,
      tarif_bezug: form.elements.tarif_bezug.value,
      tarif_bezug_fest: Number(form.elements.tarif_bezug_fest.value),
      tarif_einspeisung_modus: form.elements.tarif_einspeisung_modus.value,
      tarif_einspeisung: form.elements.tarif_einspeisung.value,
      tarif_einspeisung_fest: Number(form.elements.tarif_einspeisung_fest.value),
      tarif_peak: "Festwert",
      tarif_peak_fest: Number(form.elements.tarif_peak_fest.value),
      daecher: roofs
    }, variants);
  }

  async function updateForecast() {
    var plant = selectedPlant("forecastPlant");
    var requestId = ++state.forecastRequest;
    if (!plant || state.forecastPlantId !== plant.id) {
      state.forecastPlantId = plant ? plant.id : null;
      state.forecastResult = null;
      state.forecastVisibleSeries = null;
      state.forecastRangeStart = null;
      state.forecastRangeEnd = null;
    }
    resetForecastChart();
    if (!plant) return setForecastState("Kein System verfügbar.");

    byId("forecastVariant").textContent = managerLabel(plant.manager_variant);
    byId("forecastConnection").textContent = plant.installation_id ? "Verbunden mit " + plant.installation_id : "Noch nicht verknüpft";
    renderForecastLicenseWarning(plant);
    if (!byId("view-forecast").classList.contains("active")) return;

    setForecastState("Prognosedaten werden geladen.");
    byId("forecastApiStatus").textContent = "Datenverbindung wird geprüft";
    try {
      var result = await api("/api/plants/" + plant.id + "/prognosis?historyDays=" + encodeURIComponent(state.forecastHistoryDays));
      if (requestId !== state.forecastRequest) return;
      renderForecastResult(result);
      if (["available", "no_data"].includes(result.status)) {
        await loadForecastConfiguration(plant, requestId);
      }
    } catch (error) {
      if (requestId !== state.forecastRequest) return;
      byId("forecastApiStatus").textContent = "Prognosedienst nicht erreichbar";
      setForecastState(error.message);
    }
  }

  function faultDate(value) {
    if (!value) return "–";
    var parsed = new Date(value);
    return Number.isNaN(parsed.getTime()) ? "–" : parsed.toLocaleString("de-CH");
  }

  function faultSeverityLabel(value) {
    return { critical: "Kritisch", error: "Fehler", warning: "Warnung", info: "Info" }[value] || value;
  }

  function resetFaultDisplay(message) {
    byId("faultActiveCount").textContent = "0";
    byId("faultUrgentCount").textContent = "0";
    byId("faultLastUpdated").textContent = "–";
    byId("faultActiveBody").innerHTML = "";
    byId("faultHistoryBody").innerHTML = "";
    byId("faultActiveTable").classList.add("hidden");
    byId("faultHistoryTable").classList.add("hidden");
    byId("faultState").classList.remove("hidden");
    byId("faultState").textContent = message;
    byId("faultHistoryState").classList.remove("hidden");
    byId("faultHistoryState").textContent = "Noch keine behobenen Störungen.";
  }

  function resetFaultRecipients(message) {
    byId("faultRecipientForm").classList.add("hidden");
    byId("faultRecipientError").textContent = "";
    byId("faultRecipientList").innerHTML = "";
    byId("faultRecipientStatus").textContent = message;
  }

  function renderFaultRecipients(result) {
    var recipients = result.recipients || [];
    byId("faultRecipientForm").classList.toggle("hidden", !result.canManage);
    byId("faultRecipientError").textContent = "";
    byId("faultRecipientList").innerHTML = recipients.length
      ? recipients.map(function (recipient) {
          var remove = result.canManage
            ? "<button class='icon-button' type='button' data-remove-fault-recipient='" + escapeHtml(recipient.email) +
              "' aria-label='" + escapeHtml(recipient.email) + " entfernen' title='Empfänger entfernen'>×</button>"
            : "";
          return "<div class='fault-recipient-row'><span><strong>" + escapeHtml(recipient.email) +
            "</strong><small>Seit " + escapeHtml(faultDate(recipient.createdAt)) + "</small></span>" + remove + "</div>";
        }).join("")
      : "<div class='fault-recipient-empty'>Noch keine Empfänger eingetragen.</div>";
    byId("faultRecipientStatus").textContent = result.mailConfigured
      ? recipients.length + " von " + Number(result.limit || 10) + " Empfängern eingetragen."
      : "Der Mailversand ist serverseitig noch nicht konfiguriert.";
  }

  function faultRows(faults, history) {
    return faults.map(function (fault) {
      var source = "<strong>" + escapeHtml(fault.sourceName) + "</strong><small>" + escapeHtml(fault.sourceType + " · " + fault.sourceId) + "</small>";
      var message = "<strong>" + escapeHtml(fault.message) + "</strong><small>" + escapeHtml(fault.code) + "</small>";
      var time = history ? fault.resolvedAt : fault.firstSeenAt;
      return "<tr><td><span class='severity severity-" + escapeHtml(fault.severity) + "'>" +
        escapeHtml(faultSeverityLabel(fault.severity)) + "</span></td><td>" + source +
        "</td><td>" + message + "</td><td>" + escapeHtml(faultDate(time)) + "</td></tr>";
    }).join("");
  }

  function renderFaultResult(result, plant) {
    var active = result.active || [];
    var history = result.history || [];
    var labels = {
      available: ["Aktuell", "available", "Störungsdaten sind aktuell."],
      offline: ["Offline", "review", "Seit mehr als 15 Minuten keine Daten empfangen."],
      no_data: ["Wartet auf Daten", "neutral", "Der Manager hat noch keinen Störungssnapshot gesendet."],
      not_connected: ["Nicht verbunden", "review", "Das System ist noch nicht mit einem Manager verknüpft."],
      license_required: ["Managerlizenz erforderlich", "review", "Für dieses System ist noch keine aktive Managerlizenz vorhanden."]
    };
    var status = labels[result.status] || ["Unbekannt", "review", "Der Störungsstatus konnte nicht bestimmt werden."];
    var managerInactive = result.manager && !result.manager.active;
    byId("faultConnectionStatus").textContent = managerInactive ? "Manager inaktiv" : status[0];
    byId("faultConnectionStatus").className = "status " + (managerInactive ? "review" : status[1]);
    byId("faultConnection").textContent = plant.installation_id ? "Verbunden mit " + plant.installation_id : "Noch nicht verknüpft";
    byId("faultApiStatus").textContent = managerInactive ? "Der Manager meldet sich als inaktiv." : status[2];
    byId("faultSignal").classList.toggle("offline", result.status !== "available" || managerInactive);
    byId("faultActiveCount").textContent = String(active.length);
    byId("faultUrgentCount").textContent = String(active.filter(function (fault) { return ["critical", "error"].includes(fault.severity); }).length);
    byId("faultLastUpdated").textContent = faultDate(result.lastReceivedAt);

    byId("faultActiveBody").innerHTML = faultRows(active, false);
    byId("faultActiveTable").classList.toggle("hidden", active.length === 0);
    byId("faultState").classList.toggle("hidden", active.length > 0);
    byId("faultState").textContent = result.status === "available" && active.length === 0
      ? "Keine aktiven Störungen."
      : status[2];

    byId("faultHistoryBody").innerHTML = faultRows(history, true);
    byId("faultHistoryTable").classList.toggle("hidden", history.length === 0);
    byId("faultHistoryState").classList.toggle("hidden", history.length > 0);
    byId("faultHistoryState").textContent = "Noch keine behobenen Störungen.";
  }

  async function updateFaults() {
    var plant = selectedPlant("faultPlant");
    var requestId = ++state.faultRequest;
    resetFaultDisplay("Störungsdaten werden geladen.");
    resetFaultRecipients("Empfänger werden geladen.");
    if (!plant) {
      byId("faultConnectionStatus").textContent = "Kein System";
      byId("faultConnectionStatus").className = "status neutral";
      resetFaultRecipients("Für die Empfängerverwaltung muss eine Anlage gewählt sein.");
      return;
    }

    byId("faultConnection").textContent = plant.installation_id ? "Verbunden mit " + plant.installation_id : "Noch nicht verknüpft";
    if (!byId("view-faults").classList.contains("active")) return;

    byId("faultApiStatus").textContent = "Datenverbindung wird geprüft";
    var responses = await Promise.allSettled([
      api("/api/plants/" + plant.id + "/faults"),
      api("/api/plants/" + plant.id + "/fault-notification-recipients")
    ]);
    if (requestId !== state.faultRequest) return;
    if (responses[0].status === "fulfilled") {
      renderFaultResult(responses[0].value, plant);
    } else {
      byId("faultConnectionStatus").textContent = "Nicht erreichbar";
      byId("faultConnectionStatus").className = "status review";
      byId("faultApiStatus").textContent = "Störungsdienst nicht erreichbar";
      byId("faultSignal").classList.add("offline");
      resetFaultDisplay(responses[0].reason.message);
    }
    if (responses[1].status === "fulfilled") {
      renderFaultRecipients(responses[1].value);
    } else {
      resetFaultRecipients(responses[1].reason.message);
    }
  }

  function configurePlantLegacy(plant) {
    if (!plant) return;
    var owned = paidLicenseSummary(plant.id);
    var configuration = null;
    try { configuration = plant.configuration_json ? JSON.parse(plant.configuration_json) : null; } catch (_) { configuration = null; }
    configuration = configuration || {
      name: plant.name,
      location: plant.location,
      siteType: plant.type,
      peakShaving: currentManagerVariant(plant) === "manager_peak",
      gridMeasurement: { manufacturer: "", host: "", source: "", notes: "" },
      pvSystem: { enabled: false, manufacturer: "", host: "" },
      costReport: { enabled: false, powerMeters: 0, auxiliaryMeters: 0 },
      devices: {
        battery: { quantity: owned.battery || 0, name: "" },
        buffer_storage: { quantity: owned.buffer_storage || 0, name: "" },
        ev_charger: { quantity: owned.ev_charger || 0, model: "", address: "" },
        consumer_single: { quantity: owned.consumer_single || 0, name: "", ratedPower: 0 },
        boiler_multi: { quantity: owned.boiler_multi || 0, name: "", volume: 0 }
      }
    };
    configuration.devices = configuration.devices || {};
    if (!Object.prototype.hasOwnProperty.call(configuration.devices, "buffer_storage")) {
      configuration.devices.buffer_storage = configuration.devices.battery || {};
      configuration.devices.battery = {};
    }
    Object.keys(deviceLabels).forEach(function (key) {
      configuration.devices[key] = configuration.devices[key] || {};
      configuration.devices[key].quantity = Math.max(Number(configuration.devices[key].quantity || 0), Number(owned[key] || 0));
    });
    var form = byId("systemForm");
    form.dataset.plantId = plant.id;
    form.elements.name.value = configuration.name || plant.name;
    form.elements.location.value = configuration.location || plant.location;
    form.elements.siteType.value = configuration.siteType || plant.type;
    form.elements.peakShaving.checked = Boolean(configuration.peakShaving);
    form.elements.gridManufacturer.value = configuration.gridMeasurement?.manufacturer || "";
    form.elements.gridHost.value = configuration.gridMeasurement?.host || "";
    form.elements.gridSource.value = configuration.gridMeasurement?.source || "";
    form.elements.gridNotes.value = configuration.gridMeasurement?.notes || "";
    form.elements.pvEnabled.checked = Boolean(configuration.pvSystem?.enabled);
    form.elements.pvManufacturer.value = configuration.pvSystem?.manufacturer || "";
    form.elements.pvHost.value = configuration.pvSystem?.host || "";
    form.elements.batteryQuantity.value = configuration.devices?.battery?.quantity || 0;
    form.elements.batteryName.value = configuration.devices?.battery?.name || "";
    form.elements.bufferQuantity.value = configuration.devices?.buffer_storage?.quantity || 0;
    form.elements.bufferName.value = configuration.devices?.buffer_storage?.name || "";
    form.elements.evQuantity.value = configuration.devices?.ev_charger?.quantity || 0;
    form.elements.evModel.value = configuration.devices?.ev_charger?.model || "";
    form.elements.evAddress.value = configuration.devices?.ev_charger?.address || "";
    form.elements.consumerQuantity.value = configuration.devices?.consumer_single?.quantity || 0;
    form.elements.consumerName.value = configuration.devices?.consumer_single?.name || "";
    form.elements.consumerPower.value = configuration.devices?.consumer_single?.ratedPower || 0;
    form.elements.consumerHardware.value = configuration.devices?.consumer_single?.hardware || "";
    form.elements.consumerTopic.value = configuration.devices?.consumer_single?.topicPrefix || "";
    form.elements.boilerQuantity.value = configuration.devices?.boiler_multi?.quantity || 0;
    form.elements.boilerName.value = configuration.devices?.boiler_multi?.name || "";
    form.elements.boilerVolume.value = configuration.devices?.boiler_multi?.volume || 0;
    form.elements.boilerHardware.value = configuration.devices?.boiler_multi?.hardware || "";
    form.elements.boilerTopic.value = configuration.devices?.boiler_multi?.topicPrefix || "";
    form.elements.costReportEnabled.checked = Boolean(configuration.costReport?.enabled);
    form.elements.costPowerMeters.value = configuration.costReport?.powerMeters || 0;
    form.elements.costAuxMeters.value = configuration.costReport?.auxiliaryMeters || 0;
    byId("packageResult").classList.add("hidden");
    showWizardStep(0);
    updateRecommendation();
    showView("configurator");
  }

  function systemPayloadLegacy(form) {
    var values = Object.fromEntries(new FormData(form).entries());
    return {
      plantId: form.dataset.plantId || "",
      name: values.name, location: values.location, siteType: values.siteType, peakShaving: Boolean(values.peakShaving),
      gridMeasurement: { manufacturer: values.gridManufacturer, host: values.gridHost, source: values.gridSource, notes: values.gridNotes },
      pvSystem: { enabled: Boolean(values.pvEnabled), manufacturer: values.pvManufacturer, host: values.pvHost },
      costReport: { enabled: Boolean(values.costReportEnabled), powerMeters: Number(values.costPowerMeters || 0), auxiliaryMeters: Number(values.costAuxMeters || 0) },
      devices: {
        battery: { quantity: Number(values.batteryQuantity), name: values.batteryName },
        buffer_storage: { quantity: Number(values.bufferQuantity), name: values.bufferName },
        ev_charger: { quantity: Number(values.evQuantity), name: "Ladestation", model: values.evModel, address: values.evAddress },
        consumer_single: { quantity: Number(values.consumerQuantity), name: values.consumerName, ratedPower: Number(values.consumerPower || 0), hardware: values.consumerHardware, topicPrefix: values.consumerTopic },
        boiler_multi: { quantity: Number(values.boilerQuantity), name: values.boilerName, volume: Number(values.boilerVolume || 0), hardware: values.boilerHardware, topicPrefix: values.boilerTopic }
      }
    };
  }

  function schemaDefaults(fields) {
    return Object.fromEntries((fields || []).map(function (field) { return [field.key, field.default]; }));
  }

  function renderSchemaField(field, value, attribute) {
    var data = " " + attribute + "='" + escapeHtml(field.key) + "'";
    if (field.type === "boolean") {
      return "<label class='schema-toggle'><input type='checkbox'" + data + (value ? " checked" : "") + "><span>" + escapeHtml(field.label) + "</span></label>";
    }
    if (field.type === "select" || field.type === "choice") {
      var options = (field.options || []).map(function (option) {
        return "<option value='" + escapeHtml(option.value) + "'" + (String(option.value) === String(value) ? " selected" : "") + ">" + escapeHtml(option.label) + "</option>";
      }).join("");
      return "<label>" + escapeHtml(field.label) + "<select" + data + ">" + options + "</select></label>";
    }
    if (field.type === "json") {
      return "<label class='full-width'>" + escapeHtml(field.label) + "<textarea rows='4'" + data + ">" + escapeHtml(value == null ? field.default : value) + "</textarea></label>";
    }
    var type = ["integer", "number"].includes(field.type) ? "number" : "text";
    var step = field.type === "number" ? " step='any'" : "";
    var min = field.min == null ? "" : " min='" + escapeHtml(field.min) + "'";
    var max = field.max == null ? "" : " max='" + escapeHtml(field.max) + "'";
    return "<label>" + escapeHtml(field.label) + "<input type='" + type + "'" + step + min + max + data + " value='" + escapeHtml(value == null ? field.default : value) + "'></label>";
  }

  function renderSchemaGroups(fields, values, attribute) {
    var groups = {};
    (fields || []).forEach(function (field) {
      groups[field.section] = groups[field.section] || [];
      groups[field.section].push(field);
    });
    return Object.keys(groups).map(function (section) {
      var controls = groups[section].map(function (field) {
        return renderSchemaField(field, Object.prototype.hasOwnProperty.call(values || {}, field.key) ? values[field.key] : field.default, attribute);
      }).join("");
      return "<section class='schema-group'><h4>" + escapeHtml(section) + "</h4><div class='schema-grid'>" + controls + "</div></section>";
    }).join("");
  }

  function readSchemaValues(root, fields, attribute) {
    var result = {};
    (fields || []).forEach(function (field) {
      var control = root.querySelector("[" + attribute + "='" + field.key + "']");
      if (!control) return;
      if (field.type === "boolean") result[field.key] = control.checked;
      else if (field.type === "integer" || field.type === "select") result[field.key] = Number(control.value || 0);
      else if (field.type === "choice") result[field.key] = control.value;
      else if (field.type === "number") result[field.key] = Number(control.value || 0);
      else result[field.key] = control.value;
    });
    return result;
  }

  function profileOptions(kind, selected) {
    return (state.wizardCatalog?.integrations?.[kind] || []).map(function (profile) {
      var label = profile.manufacturer + " · " + profile.name;
      return "<option value='" + escapeHtml(profile.id) + "'" + (profile.id === selected ? " selected" : "") + ">" + escapeHtml(label) + "</option>";
    }).join("");
  }

  function selectedProfile(kind, id) {
    var profiles = state.wizardCatalog?.integrations?.[kind] || [];
    return profiles.find(function (entry) { return entry.id === id; }) || profiles[0] || {};
  }

  function integrationKind(key) {
    if (key === "battery") return "storage";
    if (["buffer_storage", "consumer_single", "boiler_multi"].includes(key)) return "actuator";
    return "";
  }

  function renderIntegrationFields(key, integration, compact) {
    var kind = integrationKind(key);
    if (!kind) return "";
    var selected = selectedProfile(kind, integration.profile || "manual");
    if (kind === "storage") {
      var manualStorage = selected.id === "manual"
        ? "<label>Bestehende Leistungsvariable<input data-integration-field='sourceVariableId' type='number' min='0' value='" + escapeHtml(integration.sourceVariableId || 0) + "'></label>"
        : "";
      return "<div class='configuration-band' data-main-integration><h3>Speicheranbindung</h3><div class='field-grid'>" +
        "<label>Geräteprofil<select data-integration-field='profile'>" + profileOptions(kind, selected.id) + "</select></label>" +
        "<label>IP-Adresse oder Hostname<input data-integration-field='host' maxlength='120' value='" + escapeHtml(integration.host || "") + "'></label>" +
        "<label>Port<input data-integration-field='port' type='number' min='0' max='65535' value='" + escapeHtml(integration.port || selected.defaultPort || 0) + "'></label>" +
        "<label>Modbus Geräte-ID<input data-integration-field='unitId' type='number' min='0' max='247' value='" + escapeHtml(integration.unitId == null ? 1 : integration.unitId) + "'></label>" +
        manualStorage + "</div><p class='integration-status'>Batterietyp und Variablen werden aus dem Profil abgeleitet.</p></div>";
    }
    var manual = selected.id === "manual"
      ? "<label>Bestehender Schaltkontakt<input data-integration-field='sourceVariableId' type='number' min='0' value='" + escapeHtml(integration.sourceVariableId || 0) + "'></label>" +
        (key === "consumer_single" ? "<label>Bestehende Rückmeldung<input data-integration-field='feedbackVariableId' type='number' min='0' value='" + escapeHtml(integration.feedbackVariableId || 0) + "'></label>" : "")
      : "";
    return "<div class='configuration-band' data-main-integration><h3>" + (compact ? "Aktor" : "Schaltaktor") + "</h3><div class='field-grid'>" +
      "<label>Geräteprofil<select data-integration-field='profile'>" + profileOptions(kind, selected.id) + "</select></label>" +
      "<label>MQTT-Topic-Präfix<input data-integration-field='topicPrefix' maxlength='180' value='" + escapeHtml(integration.topicPrefix || "") + "'></label>" +
      "<label>Ausgang / Kanal<input data-integration-field='channel' type='number' min='0' max='" + escapeHtml(Math.max(0, Number(selected.outputs || 1) - 1)) + "' value='" + escapeHtml(integration.channel || 0) + "'></label>" +
      manual + "</div><p class='integration-status'>Schaltkontakt und Rückmeldung werden bei Geräteprofilen automatisch verbunden.</p></div>";
  }

  function clientLegacyItem(key, source, index) {
    var properties = schemaDefaults(state.wizardCatalog?.consumerFields?.[key]);
    var integration = { profile: "manual", host: "", port: 0, unitId: 1, topicPrefix: "", channel: 0, sourceVariableId: 0 };
    if (key === "consumer_single") {
      properties.Nennleistung = Number(source.ratedPower || 0);
      if (source.hardware === "shelly_1pm") integration.profile = "shelly_plus_1pm";
      integration.topicPrefix = source.topicPrefix || "";
    }
    if (key === "boiler_multi") {
      properties.Boilervolumen = Number(source.volume || 300);
      if (source.hardware === "shelly_1pm") integration.profile = "shelly_plus_1pm";
      integration.topicPrefix = source.topicPrefix || "";
    }
    if (key === "buffer_storage" && source.hardware === "shelly_1pm") {
      integration.profile = "shelly_plus_1pm";
      integration.topicPrefix = source.topicPrefix || "";
    }
    if (key === "ev_charger") {
      properties.Geraetetyp = { goe_legacy: 1, goe_gemini: 2, smartme_pico: 3 }[source.model] || 0;
      properties.Geraeteadresse = source.address || "";
    }
    return {
      name: source.name || deviceLabels[key] + " " + (index + 1),
      variant: key === "ev_charger" ? "standalone" : undefined,
      integration: integration,
      properties: properties,
      topology: key === "battery" ? schemaDefaults(state.wizardCatalog?.topologyFields?.battery) : undefined,
      powerLevels: ["buffer_storage", "boiler_multi"].includes(key) ? [] : undefined,
      schedule: key === "boiler_multi" ? [] : undefined,
      sensor: ["buffer_storage", "boiler_multi"].includes(key)
        ? { profile: "manual", topicPrefix: "", sourceVariableId: 0 }
        : undefined
    };
  }

  function collectIntegration(root) {
    var integration = {};
    var scope = root.querySelector("[data-main-integration]") || root;
    scope.querySelectorAll("[data-integration-field]").forEach(function (control) {
      var key = control.dataset.integrationField;
      integration[key] = ["port", "unitId", "channel", "sourceVariableId", "feedbackVariableId"].includes(key) ? Number(control.value || 0) : control.value;
    });
    return integration;
  }

  function renderSensorFields(sensor) {
    var selected = selectedProfile("sensor", sensor?.profile || "manual");
    var source = selected.id === "manual"
      ? "<label>Bestehende Temperaturvariable<input data-integration-field='sourceVariableId' type='number' min='0' value='" + escapeHtml(sensor?.sourceVariableId || 0) + "'></label>"
      : "<label>MQTT-Topic-Präfix<input data-integration-field='topicPrefix' maxlength='180' value='" + escapeHtml(sensor?.topicPrefix || "") + "'></label>";
    return "<div class='configuration-band sensor-band' data-sensor-integration><h3>Temperaturfühler</h3><div class='field-grid'>" +
      "<label>Fühlerprofil<select data-integration-field='profile'>" + profileOptions("sensor", selected.id) + "</select></label>" +
      source + "</div><p class='integration-status'>Beim Shelly Plus Add-on wird die Temperaturvariable automatisch zugeordnet.</p></div>";
  }

  function renderPowerLevels(key, levels) {
    var fields = state.wizardCatalog?.deviceListFields?.powerLevel || [];
    var rows = (levels || []).map(function (level, index) {
      var values = Object.assign(schemaDefaults(fields), level || {}, { Stufe: index + 1 });
      return "<div class='structured-row' data-power-level><div class='structured-row-head'><strong>Stufe " + (index + 1) +
        "</strong><button class='text-action destructive-link' type='button' data-remove-power-level>Entfernen</button></div><div class='schema-groups'>" +
        renderSchemaGroups(fields, values, "data-power-level-field") + "</div>" +
        renderIntegrationFields(key, level.integration || { profile: "manual" }, true) + "</div>";
    }).join("");
    return "<section class='structured-editor'><div class='structured-editor-head'><div><h3>Leistungsstufen</h3><p>Leistung und Aktor je Stufe.</p></div>" +
      "<button class='button secondary compact' type='button' data-add-power-level>Stufe hinzufügen</button></div><div data-power-levels>" + rows + "</div></section>";
  }

  function renderScheduleRows(rows) {
    var fields = state.wizardCatalog?.deviceListFields?.schedule || [];
    var content = (rows || []).map(function (row, index) {
      return "<div class='structured-row compact-row' data-schedule-row><div class='structured-row-head'><strong>Zeitpunkt " + (index + 1) +
        "</strong><button class='text-action destructive-link' type='button' data-remove-schedule-row>Entfernen</button></div><div class='schema-groups'>" +
        renderSchemaGroups(fields, Object.assign(schemaDefaults(fields), row || {}), "data-schedule-field") + "</div></div>";
    }).join("");
    return "<section class='structured-editor'><div class='structured-editor-head'><div><h3>Solltemperatur-Zeitplan</h3><p>Uhrzeiten und Solltemperaturen als Liste.</p></div>" +
      "<button class='button secondary compact' type='button' data-add-schedule-row>Zeitpunkt hinzufügen</button></div><div data-schedule-rows>" + content + "</div></section>";
  }

  function collectPowerLevels(root) {
    var fields = state.wizardCatalog?.deviceListFields?.powerLevel || [];
    return Array.from(root.querySelectorAll("[data-power-level]")).map(function (row, index) {
      return {
        ...readSchemaValues(row, fields, "data-power-level-field"),
        Stufe: index + 1,
        integration: collectIntegration(row)
      };
    });
  }

  function collectScheduleRows(root) {
    var fields = state.wizardCatalog?.deviceListFields?.schedule || [];
    return Array.from(root.querySelectorAll("[data-schedule-row]")).map(function (row) {
      return readSchemaValues(row, fields, "data-schedule-field");
    });
  }

  function collectDeviceItems(key) {
    return Array.from(document.querySelectorAll("[data-device-editor='" + key + "'] [data-device-instance]")).map(function (root) {
      var variant = root.querySelector("[data-ev-variant]")?.value || "standalone";
      var fields = key === "ev_charger" && variant === "gateway"
        ? state.wizardCatalog?.evGatewayFields || []
        : state.wizardCatalog?.consumerFields?.[key] || [];
      var result = {
        name: root.querySelector("[data-device-name]").value,
        variant: variant,
        integration: ["buffer_storage", "boiler_multi"].includes(key) ? { profile: "manual" } : collectIntegration(root),
        properties: readSchemaValues(root, fields, "data-device-property")
      };
      if (key === "battery") {
        result.topology = readSchemaValues(root, state.wizardCatalog?.topologyFields?.battery || [], "data-battery-topology");
      }
      if (["buffer_storage", "boiler_multi"].includes(key)) {
        result.powerLevels = collectPowerLevels(root);
        result.sensor = collectIntegration(root.querySelector("[data-sensor-integration]"));
      }
      if (key === "boiler_multi") result.schedule = collectScheduleRows(root);
      return result;
    });
  }

  function renderDeviceEditor(key, quantity, sourceItems) {
    var editor = document.querySelector("[data-device-editor='" + key + "']");
    if (!editor || !state.wizardCatalog) return;
    var items = sourceItems || (editor.children.length ? collectDeviceItems(key) : state.deviceDrafts[key] || []);
    while (items.length < quantity) items.push(clientLegacyItem(key, {}, items.length));
    items = items.slice(0, quantity);
    state.deviceDrafts[key] = items;
    editor.innerHTML = items.map(function (item, index) {
      var variant = key === "ev_charger" && item.variant === "gateway" ? "gateway" : "standalone";
      var fields = key === "ev_charger" && variant === "gateway"
        ? state.wizardCatalog.evGatewayFields || []
        : state.wizardCatalog.consumerFields[key] || [];
      var properties = Object.assign(schemaDefaults(fields), item.properties || {});
      var name = item.name || deviceLabels[key] + " " + (index + 1);
      var identity = "<div class='field-grid'><label>Bezeichnung<input data-device-name maxlength='80' value='" +
        escapeHtml(name) + "'></label>";
      if (key === "ev_charger") {
        identity += "<label>Anbindung<select data-ev-variant>" + (state.wizardCatalog.evVariants || []).map(function (option) {
          return "<option value='" + escapeHtml(option.value) + "'" + (option.value === variant ? " selected" : "") + ">" + escapeHtml(option.label) + "</option>";
        }).join("") + "</select></label>";
      }
      identity += "</div>";
      var topology = key === "battery"
        ? "<div class='schema-groups topology-settings'>" + renderSchemaGroups(
            state.wizardCatalog?.topologyFields?.battery || [],
            Object.assign(schemaDefaults(state.wizardCatalog?.topologyFields?.battery), item.topology || {}),
            "data-battery-topology"
          ) + "</div>"
        : "";
      var integration = ["battery", "consumer_single"].includes(key)
        ? renderIntegrationFields(key, item.integration || {})
        : "";
      var structured = ["buffer_storage", "boiler_multi"].includes(key)
        ? renderSensorFields(item.sensor || {}) + renderPowerLevels(key, item.powerLevels || [])
        : "";
      if (key === "boiler_multi") structured += renderScheduleRows(item.schedule || []);
      return "<details class='device-instance' data-device-instance='" + index + "'" + (index === 0 ? " open" : "") + "><summary>" +
        escapeHtml(name) + "</summary><div class='device-instance-body'>" + identity + integration + topology + structured +
        "<div class='schema-groups'>" + renderSchemaGroups(fields, properties, "data-device-property") + "</div></div></details>";
    }).join("");
  }

  function collectPvSurfaces() {
    var fields = state.wizardCatalog?.topologyFields?.pvSurface || [];
    return Array.from(document.querySelectorAll("[data-topology-editor='pvSurfaces'] [data-topology-instance]")).map(function (root, index) {
      return {
        ID: "pv-" + (index + 1),
        ...readSchemaValues(root, fields, "data-pv-surface")
      };
    });
  }

  function renderPvSurfaceEditor(quantity, sourceItems) {
    var editor = document.querySelector("[data-topology-editor='pvSurfaces']");
    if (!editor || !state.wizardCatalog) return;
    var fields = state.wizardCatalog.topologyFields?.pvSurface || [];
    var items = sourceItems || (editor.children.length ? collectPvSurfaces() : state.pvSurfaceDrafts || []);
    while (items.length < quantity) {
      items.push({ ID: "pv-" + (items.length + 1), ...schemaDefaults(fields), Name: "PV-Fläche " + (items.length + 1) });
    }
    items = items.slice(0, quantity);
    state.pvSurfaceDrafts = items;
    editor.innerHTML = items.map(function (item, index) {
      var values = Object.assign(schemaDefaults(fields), item || {});
      return "<details class='device-instance topology-instance' data-topology-instance='" + index + "'" + (index === 0 ? " open" : "") + "><summary>" +
        escapeHtml(values.Name || "PV-Fläche " + (index + 1)) + "</summary><div class='device-instance-body schema-groups'>" +
        renderSchemaGroups(fields, values, "data-pv-surface") + "</div></details>";
    }).join("");
  }

  function renderManagerFields(properties) {
    if (!state.wizardCatalog || !byId("managerConfigurationFields")) return;
    byId("managerConfigurationFields").innerHTML = renderSchemaGroups(state.wizardCatalog.managerFields, properties || {}, "data-manager-property");
  }

  function applyWizardCatalog(catalog) {
    state.wizardCatalog = catalog;
    document.querySelectorAll("[data-profile-select='energy']").forEach(function (select) {
      select.innerHTML = profileOptions("energy", "manual");
    });
    renderManagerFields({});
    Object.keys(deviceLabels).forEach(function (key) { renderDeviceEditor(key, 0, []); });
    renderPvSurfaceEditor(0, []);
    updateEnergySourceVisibility(byId("systemForm"), "grid");
    updateEnergySourceVisibility(byId("systemForm"), "pv");
    updatePvTopologyVisibility(byId("systemForm"));
  }

  function updateEnergySourceVisibility(form, prefix) {
    var manual = form.elements[prefix + "Profile"]?.value === "manual";
    form.querySelector("[data-manual-source='" + prefix + "']")?.classList.toggle("hidden", !manual);
  }

  function updatePvTopologyVisibility(form) {
    form.querySelector("[data-pv-topology]")?.classList.toggle("hidden", !form.elements.pvEnabled.checked);
  }

  function setEnergyIntegration(form, prefix, integration) {
    var select = form.elements[prefix + "Profile"];
    select.value = integration.profile || (integration.manufacturer === "fronius" ? "fronius_solar_api_v1" : "manual");
    form.elements[prefix + "Host"].value = integration.host || "";
    form.elements[prefix + "Port"].value = integration.port || selectedProfile("energy", select.value).defaultPort || 0;
    form.elements[prefix + "UnitId"].value = integration.unitId == null ? 1 : integration.unitId;
    if (form.elements[prefix + "SourceVariableId"]) {
      form.elements[prefix + "SourceVariableId"].value = integration.sourceVariableId || 0;
    }
    updateEnergySourceVisibility(form, prefix);
  }

  function configurePlant(plant) {
    if (!plant || !state.wizardCatalog) return;
    var owned = paidLicenseSummary(plant.id);
    var configuration = null;
    try { configuration = plant.configuration_json ? JSON.parse(plant.configuration_json) : null; } catch (_) { configuration = null; }
    configuration = configuration || {
      name: plant.name, location: plant.location, siteType: plant.type,
      peakShaving: currentManagerVariant(plant) === "manager_peak",
      manager: { properties: {} },
      gridMeasurement: { profile: "manual" },
      pvSystem: { enabled: false, profile: "manual" },
      costReport: { enabled: false, powerMeters: 0, auxiliaryMeters: 0 },
      devices: {}
    };
    configuration.devices = configuration.devices || {};
    if (!Object.prototype.hasOwnProperty.call(configuration.devices, "buffer_storage") && configuration.devices.battery) {
      configuration.devices.buffer_storage = configuration.devices.battery;
      configuration.devices.battery = {};
    }
    var form = byId("systemForm");
    form.dataset.plantId = plant.id;
    form.elements.name.value = configuration.name || plant.name;
    form.elements.location.value = configuration.location || plant.location;
    form.elements.siteType.value = configuration.siteType || plant.type;
    form.elements.peakShaving.checked = Boolean(configuration.peakShaving);
    setEnergyIntegration(form, "grid", configuration.gridMeasurement || {});
    form.elements.gridSourceVariableId.value = configuration.gridMeasurement?.sourceVariableId || Number(configuration.gridMeasurement?.source || 0);
    form.elements.gridNotes.value = configuration.gridMeasurement?.notes || "";
    form.elements.pvEnabled.checked = Boolean(configuration.pvSystem?.enabled);
    setEnergyIntegration(form, "pv", configuration.pvSystem || {});
    form.elements.pvName.value = configuration.pvSystem?.name || "PV-Wechselrichter";
    form.elements.pvAcPowerKw.value = configuration.pvSystem?.acPowerKw || 0;
    var pvSurfaces = Array.isArray(configuration.topology?.pvSurfaces) ? configuration.topology.pvSurfaces.slice() : [];
    if (!pvSurfaces.length && configuration.manager?.properties?.AnlagenPVFlaechen) {
      try {
        var legacySurfaces = JSON.parse(configuration.manager.properties.AnlagenPVFlaechen);
        if (Array.isArray(legacySurfaces)) pvSurfaces = legacySurfaces;
      } catch (_) {}
    }
    var pvSurfaceQuantity = configuration.pvSystem?.enabled ? Math.max(1, pvSurfaces.length) : 0;
    form.elements.pvSurfaceQuantity.value = pvSurfaceQuantity;
    renderPvSurfaceEditor(pvSurfaceQuantity, pvSurfaces);
    updatePvTopologyVisibility(form);
    renderManagerFields(configuration.manager?.properties || {});
    var quantityNames = { battery: "batteryQuantity", buffer_storage: "bufferQuantity", ev_charger: "evQuantity", consumer_single: "consumerQuantity", boiler_multi: "boilerQuantity", heat_pump: "heatPumpQuantity" };
    Object.keys(deviceLabels).forEach(function (key) {
      var source = configuration.devices[key] || {};
      var quantity = Math.max(Number(source.quantity || 0), Number(owned[key] || 0));
      var items = Array.isArray(source.items) ? source.items.slice() : [];
      while (items.length < quantity) items.push(clientLegacyItem(key, source, items.length));
      form.elements[quantityNames[key]].value = quantity;
      renderDeviceEditor(key, quantity, items);
    });
    form.elements.costReportEnabled.checked = Boolean(configuration.costReport?.enabled);
    form.elements.costPowerMeters.value = configuration.costReport?.powerMeters || 0;
    form.elements.costAuxMeters.value = configuration.costReport?.auxiliaryMeters || 0;
    byId("packageResult").classList.add("hidden");
    showWizardStep(0);
    updateRecommendation();
    showView("configurator");
  }

  function energyIntegration(values, prefix) {
    return {
      profile: values[prefix + "Profile"],
      host: values[prefix + "Host"],
      port: Number(values[prefix + "Port"] || 0),
      unitId: Number(values[prefix + "UnitId"] || 1),
      sourceVariableId: Number(values[prefix + "SourceVariableId"] || 0),
      notes: values[prefix + "Notes"] || ""
    };
  }

  function systemPayload(form) {
    var values = Object.fromEntries(new FormData(form).entries());
    var quantityNames = { battery: "batteryQuantity", buffer_storage: "bufferQuantity", ev_charger: "evQuantity", consumer_single: "consumerQuantity", boiler_multi: "boilerQuantity", heat_pump: "heatPumpQuantity" };
    var devices = {};
    Object.keys(deviceLabels).forEach(function (key) {
      devices[key] = { quantity: Number(values[quantityNames[key]] || 0), items: collectDeviceItems(key) };
    });
    return {
      plantId: form.dataset.plantId || "",
      name: values.name,
      location: values.location,
      siteType: values.siteType,
      peakShaving: Boolean(values.peakShaving),
      manager: { properties: readSchemaValues(byId("managerConfigurationFields"), state.wizardCatalog?.managerFields || [], "data-manager-property") },
      gridMeasurement: energyIntegration(values, "grid"),
      pvSystem: Object.assign({
        enabled: Boolean(values.pvEnabled),
        name: values.pvName,
        acPowerKw: Number(values.pvAcPowerKw || 0)
      }, energyIntegration(values, "pv")),
      topology: { pvSurfaces: collectPvSurfaces() },
      costReport: { enabled: Boolean(values.costReportEnabled), powerMeters: Number(values.costPowerMeters || 0), auxiliaryMeters: Number(values.costAuxMeters || 0) },
      devices: devices
    };
  }

  var wizardTitles = ["Anlage", "Manager, Netz und PV", "Batteriespeicher", "Pufferspeicher", "EV-Ladestation", "Einstufige Verbraucher", "Boiler", "Wärmepumpe", "Verbrauchskostenreport", "Angaben prüfen"];

  function updateRecommendation() {
    var payload = systemPayload(byId("systemForm"));
    var manager = payload.peakShaving ? "Manager mit Peak Shaving" : "Manager ohne Peak Shaving";
    byId("recommendManager").textContent = manager;
    var selectedDevices = Object.keys(deviceLabels).filter(function (key) { return payload.devices[key].quantity > 0; });
    var configuredPlant = state.plants.find(function (plant) { return plant.id === byId("systemForm").dataset.plantId; });
    var owned = configuredPlant ? paidLicenseSummary(configuredPlant.id) : {};
    var requestedModules = Object.fromEntries(Object.entries(payload.devices).map(function (entry) { return [entry[0], entry[1].quantity]; }));
    var coverage = licenseCoverage(requestedModules, owned);
    var rows = selectedDevices.map(function (key) {
      var requested = Number(payload.devices[key].quantity || 0);
      var licensed = Number(coverage[key] || 0);
      var missing = Math.max(0, requested - licensed);
      var licenseText = missing
        ? licensed + " lizenziert · " + missing + " zusätzliche " + (missing === 1 ? "Lizenz" : "Lizenzen") + " erforderlich"
        : requested + " vollständig lizenziert";
      return "<div><span>" + escapeHtml(deviceLabels[key]) + "<small class='" + (missing ? "license-missing" : "license-covered") + "'>" + escapeHtml(licenseText) + "</small></span><strong>× " + requested + "</strong></div>";
    });
    byId("recommendModules").innerHTML = rows.length ? rows.join("") : "<p>Keine Verbrauchermodule gewählt.</p>";
    if (byId("wizardReview")) {
      var deviceSummary = rows.length ? rows.join("") : "<div><span>Verbrauchermodule</span><strong>Keine</strong></div>";
      byId("wizardReview").innerHTML =
        "<div><span>System</span><strong>" + escapeHtml(payload.name || "Noch nicht angegeben") + "</strong></div>" +
        "<div><span>Standort</span><strong>" + escapeHtml(payload.location || "Noch nicht angegeben") + "</strong></div>" +
        "<div><span>Anlagentyp</span><strong>" + escapeHtml(payload.siteType) + "</strong></div>" +
        "<div><span>Manager</span><strong>" + escapeHtml(manager) + "</strong></div>" +
        "<div><span>Netzmessung</span><strong>" + escapeHtml(selectedProfile("energy", payload.gridMeasurement.profile).name + (payload.gridMeasurement.host ? " · " + payload.gridMeasurement.host : "")) + "</strong></div>" +
        "<div><span>PV-Anlage</span><strong>" + escapeHtml(payload.pvSystem.enabled ? selectedProfile("energy", payload.pvSystem.profile).name + (payload.pvSystem.host ? " · " + payload.pvSystem.host : "") : "Nicht gewählt") + "</strong></div>" +
        "<div><span>Verbrauchskostenreport</span><strong>" + escapeHtml(payload.costReport.enabled ? "Ja · separater Lizenzcode" : "Nein") + "</strong></div>" + deviceSummary;
    }
  }

  function showWizardStep(step) {
    var steps = document.querySelectorAll("[data-wizard-step]");
    state.wizardStep = Math.max(0, Math.min(steps.length - 1, step));
    steps.forEach(function (node, index) { node.classList.toggle("active", index === state.wizardStep); });
    document.querySelectorAll("[data-wizard-marker]").forEach(function (node, index) {
      node.classList.toggle("active", index === state.wizardStep);
      node.classList.toggle("done", index < state.wizardStep);
    });
    byId("wizardStepCount").textContent = "Schritt " + (state.wizardStep + 1) + " von " + steps.length;
    byId("wizardStepTitle").textContent = wizardTitles[state.wizardStep];
    byId("wizardBack").disabled = state.wizardStep === 0;
    byId("wizardNext").classList.toggle("hidden", state.wizardStep === steps.length - 1);
    byId("wizardSubmit").classList.toggle("hidden", state.wizardStep !== steps.length - 1);
    if (state.wizardStep === steps.length - 1) updateRecommendation();
  }

  function currentWizardStepValid() {
    var step = document.querySelector("[data-wizard-step='" + state.wizardStep + "']");
    var form = byId("systemForm");
    step.querySelectorAll("input, select, textarea").forEach(function (field) { field.setCustomValidity(""); });
    if (state.wizardStep === 1) {
      [["grid", true], ["pv", form.elements.pvEnabled.checked]].forEach(function (entry) {
        if (!entry[1]) return;
        var profile = selectedProfile("energy", form.elements[entry[0] + "Profile"].value);
        var host = form.elements[entry[0] + "Host"];
        if (profile.requiresHost && !host.value.trim()) host.setCustomValidity("Bitte IP-Adresse oder Hostnamen angeben.");
      });
    }
    step.querySelectorAll("[data-integration-field='profile']").forEach(function (select) {
      var instance = select.closest("[data-device-instance]");
      var editor = select.closest("[data-device-editor]");
      var scope = select.closest("[data-main-integration], [data-sensor-integration]") || instance;
      var kind = select.closest("[data-sensor-integration]") ? "sensor" : integrationKind(editor?.dataset.deviceEditor || "");
      var profile = selectedProfile(kind, select.value);
      var requiredField = profile.requiresHost ? "host" : (profile.requiresTopic ? "topicPrefix" : "");
      var control = requiredField ? scope.querySelector("[data-integration-field='" + requiredField + "']") : null;
      if (control && !control.value.trim()) control.setCustomValidity(profile.requiresHost
        ? "Bitte IP-Adresse oder Hostnamen angeben."
        : "Bitte MQTT-Topic-Präfix angeben.");
    });
    var invalid = Array.from(step.querySelectorAll("input, select, textarea")).find(function (field) { return !field.checkValidity(); });
    if (!invalid) return true;
    invalid.reportValidity();
    return false;
  }

  async function submitAuth(form, endpoint, errorId) {
    var errorNode = byId(errorId); errorNode.textContent = ""; setBusy(form, true);
    try {
      var result = await api(endpoint, { method: "POST", body: Object.fromEntries(new FormData(form).entries()) });
      form.reset();
      if (result.pendingVerification) { switchAuth("login"); authNotice(result.message, !result.delivered); return; }
      await showPortal(result);
      toast(endpoint.endsWith("register") ? "Konto wurde erstellt." : "Erfolgreich angemeldet.");
    } catch (error) { errorNode.textContent = error.message; } finally { setBusy(form, false); }
  }

  byId("loginTab").addEventListener("click", function () { switchAuth("login"); });
  byId("registerTab").addEventListener("click", function () { switchAuth("register"); });
  byId("forgotPasswordButton").addEventListener("click", function () { authNotice(""); specialAuth("forgotForm"); });
  byId("resendVerificationButton").addEventListener("click", async function () {
    var email = byId("loginForm").querySelector("input[name='email']").value.trim();
    if (!email) return void (byId("loginError").textContent = "Bitte zuerst die E-Mail-Adresse eingeben.");
    try { authNotice((await api("/api/auth/resend-verification", { method: "POST", body: { email: email } })).message); } catch (error) { byId("loginError").textContent = error.message; }
  });
  document.querySelectorAll("[data-auth-login]").forEach(function (button) { button.addEventListener("click", function () { resetToken = ""; authNotice(""); switchAuth("login"); }); });
  byId("loginForm").addEventListener("submit", function (event) { event.preventDefault(); submitAuth(event.currentTarget, "/api/auth/login", "loginError"); });
  byId("registerForm").addEventListener("submit", function (event) { event.preventDefault(); submitAuth(event.currentTarget, "/api/auth/register", "registerError"); });
  byId("forgotForm").addEventListener("submit", async function (event) { event.preventDefault(); var form = event.currentTarget; setBusy(form, true); try { var result = await api("/api/auth/forgot-password", { method: "POST", body: Object.fromEntries(new FormData(form).entries()) }); form.reset(); switchAuth("login"); authNotice(result.message); } catch (error) { byId("forgotError").textContent = error.message; } finally { setBusy(form, false); } });
  byId("resetForm").addEventListener("submit", async function (event) { event.preventDefault(); var form = event.currentTarget; var values = Object.fromEntries(new FormData(form).entries()); if (values.password !== values.password_repeat) return void (byId("resetError").textContent = "Die Passwörter stimmen nicht überein."); setBusy(form, true); try { var result = await api("/api/auth/reset-password", { method: "POST", body: { token: resetToken, password: values.password } }); resetToken = ""; form.reset(); switchAuth("login"); authNotice(result.message); } catch (error) { byId("resetError").textContent = error.message; } finally { setBusy(form, false); } });

  document.querySelectorAll(".nav-item").forEach(function (item) { item.addEventListener("click", function () { showView(item.dataset.view); }); });
  document.addEventListener("click", async function (event) {
    var goto = event.target.closest("[data-goto]");
    if (goto) {
      var gotoDialog = goto.closest("dialog");
      if (gotoDialog) gotoDialog.close();
      if (goto.dataset.goto === "configurator" && goto.closest("#newLicenseDialog")) {
        byId("systemForm").reset();
        delete byId("systemForm").dataset.plantId;
        state.deviceDrafts = {};
        state.pvSurfaceDrafts = [];
        renderManagerFields({});
        Object.keys(deviceLabels).forEach(function (key) { renderDeviceEditor(key, 0, []); });
        renderPvSurfaceEditor(0, []);
        updateEnergySourceVisibility(byId("systemForm"), "grid");
        updateEnergySourceVisibility(byId("systemForm"), "pv");
        updatePvTopologyVisibility(byId("systemForm"));
        showWizardStep(0);
        updateRecommendation();
      }
      showView(goto.dataset.goto);
    }
    var newLicense = event.target.closest("[data-open-new-license]");
    if (newLicense) byId("newLicenseDialog").showModal();
    var open = event.target.closest("[data-open-plant]");
    if (open) {
      var sourceDialog = open.closest("dialog");
      if (sourceDialog) sourceDialog.close();
      byId("plantDialog").showModal();
    }
    var openBilling = event.target.closest("[data-open-billing]");
    if (openBilling) {
      var billingSourceDialog = openBilling.closest("dialog");
      if (billingSourceDialog) billingSourceDialog.close();
      var billingForm = byId("billingForm");
      billingForm.reset();
      delete billingForm.dataset.plantId;
      byId("billingIdentityFields").classList.remove("hidden");
      byId("billingDialog").showModal();
    }
    var billingOrder = event.target.closest("[data-billing-order]");
    if (billingOrder) {
      var existingBillingForm = byId("billingForm");
      existingBillingForm.reset();
      existingBillingForm.dataset.plantId = billingOrder.dataset.billingOrder;
      var existingBillingPlant = state.plants.find(function (plant) { return plant.id === billingOrder.dataset.billingOrder; });
      existingBillingForm.querySelector("[name='name']").value = existingBillingPlant?.name || "Abrechnung";
      existingBillingForm.querySelector("[name='location']").value = existingBillingPlant?.location || "Schweiz";
      byId("billingIdentityFields").classList.add("hidden");
      byId("billingDialog").showModal();
    }
    var order = event.target.closest("[data-order]"); if (order) { byId("orderPlant").value = order.dataset.order; showView("licenses"); prepareOrderEditor(); }
    var configure = event.target.closest("[data-configure-current]");
    if (configure) configurePlant(selectedPlant("orderPlant"));
    var replacementButton = event.target.closest("[data-replace-code]");
    if (replacementButton) {
      openReplacementDialog(
        replacementButton.dataset.replaceCode,
        replacementButton.dataset.replacePlant,
        replacementButton.dataset.replaceConnected === "true"
      );
    }
    var deleteCodeButton = event.target.closest("[data-delete-code]");
    if (deleteCodeButton) openCodeDeletionDialog(deleteCodeButton.dataset.deleteCode, deleteCodeButton.dataset.deleteCodePlant);
    var deletePlantButton = event.target.closest("[data-delete-plant]");
    if (deletePlantButton) {
      openPlantDeletionDialog(
        deletePlantButton.dataset.deletePlant,
        deletePlantButton.dataset.deletePlantName,
        deletePlantButton.dataset.deletePlantPaid === "true"
      );
    }
    var codeButton = event.target.closest("[data-code]");
    if (codeButton) {
      if (codeButton.dataset.rotate === "true") {
        var sourceOrder = state.orders.find(function (order) { return order.id === codeButton.dataset.code; });
        openReplacementDialog(codeButton.dataset.code, sourceOrder?.plant_name || "dieses System", Boolean(sourceOrder?.activated_installation_id));
        return;
      }
      codeButton.disabled = true;
      try {
        var result = await api("/api/orders/" + codeButton.dataset.code + "/activation-code", { method: "POST", body: { rotate: false } });
        toast(result.message);
        await loadOrders();
      } catch (error) { toast(error.message); } finally { codeButton.disabled = false; }
    }
  });
  document.querySelectorAll("[data-close-dialog]").forEach(function (button) { button.addEventListener("click", function () { button.closest("dialog").close(); }); });
  document.querySelectorAll(".module-check, .qty").forEach(function (input) { input.addEventListener("change", updateOrder); });
  byId("peakUpgrade").addEventListener("change", updateOrder);
  byId("orderPlant").addEventListener("change", function () { prepareOrderEditor(); });
  byId("forecastPlant").addEventListener("change", updateForecast);
  byId("forecastHistoryDays").addEventListener("change", function (event) {
    state.forecastHistoryDays = Number(event.target.value) || 1;
    state.forecastRangeStart = null;
    state.forecastRangeEnd = null;
    state.forecastVisibleSeries = null;
    updateForecast();
  });
  byId("forecastSeriesControls").addEventListener("change", function (event) {
    var control = event.target.closest("[data-forecast-series]");
    if (!control || !state.forecastResult) return;
    if (!state.forecastVisibleSeries) state.forecastVisibleSeries = new Set();
    if (control.checked) state.forecastVisibleSeries.add(control.dataset.forecastSeries);
    else state.forecastVisibleSeries.delete(control.dataset.forecastSeries);
    renderForecastChart(state.forecastResult.series || []);
  });
  ["forecastRangeStart", "forecastRangeEnd"].forEach(function (id) {
    byId(id).addEventListener("change", function () {
      if (!state.forecastResult) return;
      var start = Date.parse(byId("forecastRangeStart").value);
      var end = Date.parse(byId("forecastRangeEnd").value);
      if (Number.isFinite(start)) state.forecastRangeStart = start;
      if (Number.isFinite(end)) state.forecastRangeEnd = end;
      renderForecastChart(state.forecastResult.series || []);
    });
  });
  byId("forecastRangeReset").addEventListener("click", function () {
    if (!state.forecastResult) return;
    state.forecastRangeStart = null;
    state.forecastRangeEnd = null;
    renderForecastChart(state.forecastResult.series || []);
  });
  byId("faultPlant").addEventListener("change", updateFaults);
  byId("faultRecipientForm").addEventListener("submit", async function (event) {
    event.preventDefault();
    var form = event.currentTarget;
    var plant = selectedPlant("faultPlant");
    if (!plant) return;
    byId("faultRecipientError").textContent = "";
    setBusy(form, true);
    try {
      var result = await api("/api/plants/" + plant.id + "/fault-notification-recipients", {
        method: "POST",
        body: { email: byId("faultRecipientEmail").value }
      });
      form.reset();
      toast(result.message);
      await updateFaults();
    } catch (error) {
      byId("faultRecipientError").textContent = error.message;
    } finally {
      setBusy(form, false);
    }
  });
  byId("faultRecipientList").addEventListener("click", async function (event) {
    var button = event.target.closest("[data-remove-fault-recipient]");
    var plant = selectedPlant("faultPlant");
    if (!button || !plant) return;
    button.disabled = true;
    try {
      var result = await api("/api/plants/" + plant.id + "/fault-notification-recipients", {
        method: "DELETE",
        body: { email: button.dataset.removeFaultRecipient }
      });
      toast(result.message);
      await updateFaults();
    } catch (error) {
      byId("faultRecipientError").textContent = error.message;
      button.disabled = false;
    }
  });
  ["import", "export"].forEach(function (direction) {
    var form = byId("forecastConfigForm");
    var prefix = direction === "import" ? "bezug" : "einspeisung";
    form.elements["tarif_" + prefix + "_modus"].addEventListener("change", function () {
      renderTariffSelector(form, direction, this.value, "", form.elements["tarif_" + prefix + "_fest"].value);
    });
    form.elements["tarif_" + prefix].addEventListener("change", function () {
      refreshTariffSelector(form, direction);
    });
  });
  byId("forecastAddRoof").addEventListener("click", function () {
    var roofs = Array.from(byId("forecastRoofs").querySelectorAll(".forecast-roof-row")).map(function (row) {
      return {
        kwp: Number(row.querySelector("[data-roof-field='kwp']").value),
        neigung: Number(row.querySelector("[data-roof-field='neigung']").value),
        azimut: Number(row.querySelector("[data-roof-field='azimut']").value)
      };
    });
    roofs.push({ kwp: 10, neigung: 30, azimut: 180 });
    renderForecastRoofs(roofs, false);
  });
  byId("forecastRoofs").addEventListener("click", function (event) {
    var remove = event.target.closest("[data-remove-roof]");
    if (remove) remove.closest(".forecast-roof-row").remove();
  });
  byId("forecastConfigForm").addEventListener("submit", async function (event) {
    event.preventDefault();
    var form = event.currentTarget;
    var plantId = form.dataset.plantId;
    byId("forecastConfigError").textContent = "";
    var payload;
    try {
      payload = forecastConfigurationPayload(form);
    } catch (error) {
      byId("forecastConfigError").textContent = error.message;
      return;
    }
    setBusy(form, true);
    try {
      var result = await api("/api/plants/" + plantId + "/prognosis/configuration", {
        method: "PUT",
        body: payload
      });
      var plant = state.plants.find(function (entry) { return entry.id === plantId; });
      if (plant) fillForecastConfiguration(plant, result);
      toast(result.message);
      await updateForecast();
    } catch (error) {
      byId("forecastConfigError").textContent = error.message;
    } finally {
      setBusy(form, false);
    }
  });
  byId("accountButton").addEventListener("click", function () { showView("account"); });
  byId("systemForm").addEventListener("click", function (event) {
    var instance = event.target.closest("[data-device-instance]");
    var editor = event.target.closest("[data-device-editor]");
    if (!instance || !editor) return;
    var key = editor.dataset.deviceEditor;
    if (event.target.closest("[data-add-power-level]")) {
      var items = collectDeviceItems(key);
      var position = Number(instance.dataset.deviceInstance);
      items[position].powerLevels = items[position].powerLevels || [];
      items[position].powerLevels.push({
        Stufe: items[position].powerLevels.length + 1,
        Leistung: 0,
        integration: { profile: "manual", sourceVariableId: 0 }
      });
      renderDeviceEditor(key, items.length, items);
    }
    if (event.target.closest("[data-remove-power-level]")) {
      var levelIndex = Array.from(instance.querySelectorAll("[data-power-level]")).indexOf(event.target.closest("[data-power-level]"));
      var levelItems = collectDeviceItems(key);
      levelItems[Number(instance.dataset.deviceInstance)].powerLevels.splice(levelIndex, 1);
      renderDeviceEditor(key, levelItems.length, levelItems);
    }
    if (event.target.closest("[data-add-schedule-row]")) {
      var scheduleItems = collectDeviceItems(key);
      scheduleItems[Number(instance.dataset.deviceInstance)].schedule.push({ Uhrzeit: "00:00", Solltemperatur: 50 });
      renderDeviceEditor(key, scheduleItems.length, scheduleItems);
    }
    if (event.target.closest("[data-remove-schedule-row]")) {
      var scheduleIndex = Array.from(instance.querySelectorAll("[data-schedule-row]")).indexOf(event.target.closest("[data-schedule-row]"));
      var reducedItems = collectDeviceItems(key);
      reducedItems[Number(instance.dataset.deviceInstance)].schedule.splice(scheduleIndex, 1);
      renderDeviceEditor(key, reducedItems.length, reducedItems);
    }
    updateRecommendation();
  });
  byId("systemForm").addEventListener("input", function (event) {
    var key = event.target.dataset.deviceQuantity;
    if (key) renderDeviceEditor(key, Math.max(0, Math.min(50, Number(event.target.value || 0))));
    if (event.target.dataset.topologyQuantity === "pvSurfaces") {
      renderPvSurfaceEditor(Math.max(0, Math.min(50, Number(event.target.value || 0))));
    }
    updateRecommendation();
  });
  byId("systemForm").addEventListener("change", function (event) {
    if (event.target.matches("[data-profile-select='energy']")) {
      var prefix = event.target.name === "gridProfile" ? "grid" : "pv";
      var port = event.currentTarget.elements[prefix + "Port"];
      var selected = selectedProfile("energy", event.target.value);
      if (port && (!Number(port.value) || Number(port.value) === 80 || Number(port.value) === 502 || Number(port.value) === 1502)) {
        port.value = selected.defaultPort || 0;
      }
      updateEnergySourceVisibility(event.currentTarget, prefix);
    }
    if (event.target.name === "pvEnabled") {
      if (event.target.checked && Number(event.currentTarget.elements.pvSurfaceQuantity.value || 0) === 0) {
        event.currentTarget.elements.pvSurfaceQuantity.value = 1;
        renderPvSurfaceEditor(1);
      }
      updatePvTopologyVisibility(event.currentTarget);
    }
    if (event.target.matches("[data-ev-variant]")) {
      var evEditor = event.target.closest("[data-device-editor]");
      var evItems = collectDeviceItems("ev_charger");
      renderDeviceEditor("ev_charger", evItems.length, evItems);
    }
    if (event.target.matches("[data-integration-field='profile']")) {
      var editor = event.target.closest("[data-device-editor]");
      var instance = event.target.closest("[data-device-instance]");
      var key = editor?.dataset.deviceEditor || "";
      var scope = event.target.closest("[data-main-integration], [data-sensor-integration]");
      var kind = event.target.closest("[data-sensor-integration]") ? "sensor" : integrationKind(key);
      var selectedDevice = selectedProfile(kind, event.target.value);
      var devicePort = scope?.querySelector("[data-integration-field='port']");
      var channel = scope?.querySelector("[data-integration-field='channel']");
      if (devicePort) devicePort.value = selectedDevice.defaultPort || 0;
      if (channel) {
        channel.max = Math.max(0, Number(selectedDevice.outputs || 1) - 1);
        channel.value = Math.min(Number(channel.value || 0), Number(channel.max));
      }
      var quantity = event.currentTarget.querySelector("[data-device-quantity='" + key + "']");
      renderDeviceEditor(key, Number(quantity?.value || 0));
    }
    updateRecommendation();
  });
  byId("wizardBack").addEventListener("click", function () { showWizardStep(state.wizardStep - 1); });
  byId("wizardNext").addEventListener("click", function () { if (currentWizardStepValid()) showWizardStep(state.wizardStep + 1); });
  byId("confirmReplaceCode").addEventListener("click", async function () {
    if (!state.replacementOrderId) return;
    var button = byId("confirmReplaceCode");
    var originalLabel = button.textContent;
    byId("replaceCodeError").textContent = "";
    button.disabled = true;
    button.textContent = "Ersatzcode wird versendet …";
    try {
      var result = await api("/api/orders/" + state.replacementOrderId + "/activation-code", { method: "POST", body: { rotate: true } });
      byId("replaceCodeDialog").close();
      state.replacementOrderId = null;
      toast(result.message);
      await loadOrders();
    } catch (error) {
      byId("replaceCodeError").textContent = error.message;
    } finally {
      button.disabled = false;
      button.textContent = originalLabel;
    }
  });

  byId("confirmDeleteCode").addEventListener("click", async function () {
    if (!state.codeDeletionOrderId) return;
    var button = byId("confirmDeleteCode");
    var originalLabel = button.textContent;
    byId("deleteCodeError").textContent = "";
    button.disabled = true;
    button.textContent = "Code wird gelöscht …";
    try {
      var result = await api("/api/orders/" + state.codeDeletionOrderId + "/activation-code", { method: "DELETE", body: { confirm: true } });
      byId("deleteCodeDialog").close();
      state.codeDeletionOrderId = null;
      toast(result.message);
      await loadOrders();
    } catch (error) {
      byId("deleteCodeError").textContent = error.message;
    } finally {
      button.disabled = false;
      button.textContent = originalLabel;
    }
  });

  async function deleteSelectedPlant(deletePaidLicenses, errorId, buttonId) {
    if (!state.plantDeletion) return;
    var button = byId(buttonId);
    var originalLabel = button.textContent;
    byId(errorId).textContent = "";
    button.disabled = true;
    button.textContent = "Anlage wird gelöscht …";
    try {
      var result = await api("/api/plants/" + state.plantDeletion.id, {
        method: "DELETE",
        body: { plantName: state.plantDeletion.name, deletePaidLicenses: deletePaidLicenses }
      });
      byId("deletePlantDialog").close();
      byId("deletePaidDialog").close();
      state.plantDeletion = null;
      state.configuredPlantId = null;
      await Promise.all([loadPlants(), loadOrders()]);
      showView("overview");
      toast(result.message);
    } catch (error) {
      byId(errorId).textContent = error.message;
    } finally {
      button.disabled = false;
      button.textContent = originalLabel;
    }
  }

  byId("confirmDeletePlant").addEventListener("click", async function () {
    if (!state.plantDeletion) return;
    if (state.plantDeletion.hasPaidLicense) {
      byId("deletePlantDialog").close();
      byId("deletePaidDialog").showModal();
      return;
    }
    await deleteSelectedPlant(false, "deletePlantError", "confirmDeletePlant");
  });
  byId("confirmDeletePaid").addEventListener("click", function () {
    deleteSelectedPlant(true, "deletePaidError", "confirmDeletePaid");
  });

  async function changeWorkspace(value) {
    try { state.session = await api("/api/workspace", { method: "POST", body: { organizationId: value || null } }); renderSession(); await Promise.all([loadPlants(), loadOrders(), loadInvitations()]); showView("overview"); toast("Organisation gewechselt."); }
    catch (error) { toast(error.message); renderSession(); }
  }
  byId("workspaceSelect").addEventListener("change", function (event) { changeWorkspace(event.target.value); });
  byId("accountWorkspaceSelect").addEventListener("change", function (event) { changeWorkspace(event.target.value); });

  byId("plantForm").addEventListener("submit", async function (event) {
    event.preventDefault(); var form = event.currentTarget; byId("plantError").textContent = ""; setBusy(form, true);
    try { var result = await api("/api/plants", { method: "POST", body: Object.fromEntries(new FormData(form).entries()) }); form.reset(); form.querySelector("[value='manager_standard']").checked = true; byId("plantDialog").close(); state.configuredPlantId = result.plant.id; await loadPlants(); showView("licenses"); toast("Lizenzpaket wurde angelegt."); }
    catch (error) { byId("plantError").textContent = error.message; } finally { setBusy(form, false); }
  });

  byId("billingForm").addEventListener("submit", async function (event) {
    event.preventDefault();
    var form = event.currentTarget;
    var values = Object.fromEntries(new FormData(form).entries());
    var plantId = form.dataset.plantId || "";
    byId("billingError").textContent = "";
    setBusy(form, true);
    try {
      if (!plantId) {
        var created = await api("/api/plants", {
          method: "POST",
          body: { name: values.name, type: "Abrechnung", location: values.location, manager: "billing_manager" }
        });
        plantId = created.plant.id;
        form.dataset.plantId = plantId;
      }
      var checkout = await api("/api/checkout", {
        method: "POST",
        body: {
          plantId: plantId,
          modules: {
            cost_meter_power: Number(values.powerMeters || 0),
            cost_meter_aux: Number(values.auxMeters || 0)
          }
        }
      });
      window.location.assign(checkout.checkoutUrl);
    } catch (error) {
      byId("billingError").textContent = error.message;
      setBusy(form, false);
    }
  });

  byId("systemForm").addEventListener("submit", async function (event) {
    event.preventDefault(); var form = event.currentTarget; byId("systemError").textContent = ""; setBusy(form, true);
    try {
      var result = await api("/api/configurations", { method: "POST", body: systemPayload(form) });
      state.configuredPlantId = result.plant.id;
      byId("packageResult").classList.toggle("hidden", !result.packageReady);
      if (result.packageReady) byId("packageDownload").href = result.packageUrl;
      else byId("packageDownload").removeAttribute("href");
      await Promise.all([loadPlants(), loadOrders()]);
      byId("orderPlant").value = result.plant.id;
      prepareOrderEditor(result.configurationId);
      showView("licenses");
      if (result.purchaseProposal?.required) {
        toast(result.costReportPlant
          ? "Konfiguration gespeichert. Manager-Lizenzen und der separate Verbrauchskosten-Lizenzsatz sind in der Übersicht vorbereitet."
          : "Konfiguration gespeichert. Fehlende Lizenzen und die kostenpflichtige Ersteinrichtung durch den Generator sind zur Bestellung vorbereitet.");
      } else {
        toast(result.delivered
          ? "Systemkonfiguration gespeichert und lizenziertes Einrichtungspaket per E-Mail versendet."
          : "Systemkonfiguration gespeichert. Das lizenzierte Einrichtungspaket konnte nicht per E-Mail versendet werden.");
      }
    } catch (error) { byId("systemError").textContent = error.message; } finally { setBusy(form, false); }
  });
  byId("orderRecommendation").addEventListener("click", function () {
    showView("licenses");
    if (state.configuredPlantId) byId("orderPlant").value = state.configuredPlantId;
    var plant = selectedPlant("orderPlant");
    prepareOrderEditor(plant?.configuration_id || null);
  });

  byId("organizationForm").addEventListener("submit", async function (event) { event.preventDefault(); var form = event.currentTarget; setBusy(form, true); try { state.session = await api("/api/organizations", { method: "POST", body: Object.fromEntries(new FormData(form).entries()) }); form.reset(); renderSession(); await Promise.all([loadPlants(), loadOrders(), loadInvitations()]); toast("Organisation wurde erstellt."); } catch (error) { byId("organizationError").textContent = error.message; } finally { setBusy(form, false); } });
  byId("invitationForm").addEventListener("submit", async function (event) { event.preventDefault(); var form = event.currentTarget; setBusy(form, true); try { var result = await api("/api/invitations", { method: "POST", body: Object.fromEntries(new FormData(form).entries()) }); form.reset(); await loadInvitations(); toast(result.message); } catch (error) { byId("invitationError").textContent = error.message; } finally { setBusy(form, false); } });
  byId("passwordForm").addEventListener("submit", async function (event) {
    event.preventDefault();
    var form = event.currentTarget;
    var values = Object.fromEntries(new FormData(form).entries());
    byId("passwordError").textContent = "";
    if (values.newPassword !== values.newPasswordRepeat) return void (byId("passwordError").textContent = "Die neuen Passwörter stimmen nicht überein.");
    setBusy(form, true);
    try {
      var result = await api("/api/account/password", { method: "POST", body: { currentPassword: values.currentPassword, newPassword: values.newPassword } });
      form.reset();
      toast(result.message);
    } catch (error) { byId("passwordError").textContent = error.message; } finally { setBusy(form, false); }
  });

  byId("checkoutButton").addEventListener("click", async function () {
    var plant = selectedPlant("orderPlant"); if (!plant) return;
    var button = byId("checkoutButton"); var modules = {};
    state.selectedOrder.forEach(function (item) {
      if (item.licenseQuantity > 0) modules[item.key] = item.licenseQuantity;
    });
    byId("checkoutError").textContent = ""; button.disabled = true; button.textContent = button.dataset.free === "true" ? "Wird freigeschaltet …" : "Stripe Checkout wird geöffnet …";
    try { var result = await api("/api/checkout", { method: "POST", body: { plantId: plant.id, configurationId: state.checkoutConfigurationId, managerVariant: selectedManagerVariant(plant), modules: modules } }); window.location.assign(result.checkoutUrl); }
    catch (error) { byId("checkoutError").textContent = error.message; toast(error.message); button.disabled = false; button.textContent = button.dataset.free === "true" ? "Kostenlos freischalten" : "Mit Stripe bezahlen"; }
  });

  byId("logoutButton").addEventListener("click", async function () { try { await api("/api/auth/logout", { method: "POST" }); } catch (_) { /* local logout */ } state.session = null; state.plants = []; state.orders = []; state.faultRequest += 1; history.replaceState(null, "", location.pathname); showAuth(); });

  setInterval(function () {
    if (state.session && byId("view-faults").classList.contains("active")) updateFaults();
  }, 60000);

  async function handleInvitationLink(token) {
    try { var preview = await api("/api/invitations/preview", { method: "POST", body: { token: token } }); sessionStorage.setItem("enelix_invitation_token", token); byId("loginForm").querySelector("input[name='email']").value = preview.email; byId("registerForm").querySelector("input[name='email']").value = preview.email; authNotice("Einladung zu " + preview.organization + " für " + preview.email + "."); }
    catch (error) { authNotice(error.message, true); }
  }

  async function bootstrap() {
    showAuth();
    var catalogs = await Promise.allSettled([api("/api/catalog"), api("/api/wizard-catalog")]);
    if (catalogs[0].status === "fulfilled") applyCatalog(catalogs[0].value);
    if (catalogs[1].status === "fulfilled") applyWizardCatalog(catalogs[1].value);
    else byId("systemError").textContent = "Der Systemkonfigurator konnte nicht geladen werden.";
    updateRecommendation();
    showWizardStep(0);
    if (location.hash.startsWith("#verify=")) { var verificationToken = decodeURIComponent(location.hash.slice(8)); history.replaceState(null, "", location.pathname); switchAuth("login"); try { authNotice((await api("/api/auth/verify-email", { method: "POST", body: { token: verificationToken } })).message); } catch (error) { authNotice(error.message, true); } return; }
    if (location.hash.startsWith("#reset=")) { resetToken = decodeURIComponent(location.hash.slice(7)); history.replaceState(null, "", location.pathname); specialAuth("resetForm"); return; }
    var invitationToken = location.hash.startsWith("#invite=") ? decodeURIComponent(location.hash.slice(8)) : "";
    if (invitationToken) history.replaceState(null, "", location.pathname);
    try { var session = await api("/api/session"); if (invitationToken) await handleInvitationLink(invitationToken); if (session.authenticated) return showPortal(session); switchAuth("login"); }
    catch (_) { switchAuth("login"); byId("loginError").textContent = "Das Portal ist momentan nicht erreichbar."; }
  }

  bootstrap();
}());