<?php

declare(strict_types=1);

namespace Belevo\EnelixEMS;

use InvalidArgumentException;

require_once __DIR__ . '/NetzfahrplanV4Messaufnahme.php';
require_once __DIR__ . '/NetzfahrplanV4Rueckmeldung.php';

/** Pure feedback binding for an already verified automatic physical capture. */
final class NetzfahrplanV4RueckmeldungEinrichtung
{
    /**
     * The caller verifies the current capture against the automatic plant setup,
     * including supported physical source parents. Custom mappings stay separate.
     * $assets is AnlagenBatterien; $controllers contains every assigned active
     * battery controller with its existing public measurement properties only.
     * No device read, configuration write, watchdog proof or permission is created.
     */
    public static function erstellen(
        array $capture,
        string $installationId,
        int $managerId,
        int $batteryId,
        array $assets,
        array $controllers
    ): array {
        $capture = NetzfahrplanV4Messaufnahme::configuration($capture);
        if (($capture['installationId'] ?? null) !== $installationId
            || ($capture['managerId'] ?? null) !== $managerId
            || ($capture['accounting']['storageMode'] ?? null) !== 'physical_only'
            || $capture['extraSources'] !== []) {
            throw new InvalidArgumentException('feedback_auto_capture_binding_invalid');
        }
        if (array_keys($assets) !== array_keys(array_values($assets)) || count($assets) !== 1 || !is_array($assets[0])
            || array_keys($controllers) !== array_keys(array_values($controllers)) || count($controllers) !== 1 || !is_array($controllers[0])) {
            throw new InvalidArgumentException('feedback_auto_battery_assignment_ambiguous');
        }
        $asset = $assets[0];
        $controller = $controllers[0];
        $assetId = $asset['ID'] ?? null;
        if (!is_string($assetId) || !preg_match('/^[A-Za-z0-9][A-Za-z0-9._-]{0,63}$/D', trim($assetId))
            || ($asset['Kopplung'] ?? null) !== 'ac' || ($asset['Virtuell'] ?? false) !== false
            || ($asset['SDLAktiv'] ?? false) !== false || ($controller['InstanzID'] ?? null) !== $batteryId
            || ($controller['Aktiv'] ?? true) !== true) {
            throw new InvalidArgumentException('feedback_auto_battery_binding_invalid');
        }
        foreach (['LeistungVariableID', 'SOCVariableID'] as $key) {
            if (!is_int($asset[$key] ?? null) || $asset[$key] < 1 || $asset[$key] > 99999) {
                throw new InvalidArgumentException('feedback_auto_battery_measurements_missing');
            }
        }
        if (($controller['IstleistungVariableID'] ?? null) !== $asset['LeistungVariableID']
            || ($controller['LadezustandVariableID'] ?? null) !== $asset['SOCVariableID']
            || $asset['SOCVariableID'] === $asset['LeistungVariableID']) {
            throw new InvalidArgumentException('feedback_auto_controller_measurements_differ');
        }
        if ((!is_int($asset['Leistungsfaktor'] ?? null) && !is_float($asset['Leistungsfaktor'] ?? null))
            || (float) $asset['Leistungsfaktor'] !== 1.0) {
            throw new InvalidArgumentException('feedback_auto_controller_units_differ');
        }
        $maxAge = $controller['MesswertMaxAlter'] ?? null;
        if (!is_int($maxAge) || $maxAge < 1) {
            throw new InvalidArgumentException('feedback_auto_controller_freshness_invalid');
        }
        $maxAge = min(60, $maxAge);
        $sources = [];
        $roles = [];
        foreach ($capture['accounting']['sources'] as $source) {
            if ($source['dependsOn'] !== [] || !in_array($source['role'], ['grid', 'pv', 'physical_storage'], true)) {
                throw new InvalidArgumentException('feedback_auto_derived_source_refused');
            }
            if (!in_array($source['role'], ['grid', 'physical_storage'], true)) {
                continue;
            }
            $roles[$source['role']] = ($roles[$source['role']] ?? 0) + 1;
            // The ordinary battery module consumes these same variables as W.
            if ($source['factorToW'] !== 1.0) {
                throw new InvalidArgumentException('feedback_auto_controller_units_differ');
            }
            if (($source['role'] === 'grid' && $source['variableId'] !== ($controller['NetzleistungVariableID'] ?? null))
                || ($source['role'] === 'physical_storage' && $source['variableId'] !== $asset['LeistungVariableID'])
                || $source['variableId'] === $asset['SOCVariableID']) {
                throw new InvalidArgumentException('feedback_auto_source_binding_invalid');
            }
            $expectedKey = $source['role'] === 'grid' ? 'grid' : 'battery_' . substr(hash('sha256', trim($assetId)), 0, 24);
            if ($source['key'] !== $expectedKey) {
                throw new InvalidArgumentException('feedback_auto_source_identity_changed');
            }
            $maxAge = min($maxAge, $source['maxAgeSeconds']);
            $sources[] = [
                'key' => $source['key'], 'role' => $source['role'] === 'grid' ? 'grid' : 'physical',
                'variableId' => $source['variableId'], 'parentId' => $source['parentId'],
                'ident' => $source['ident'], 'factorToW' => $source['factorToW'],
            ];
        }
        if (($roles['grid'] ?? 0) !== 1 || ($roles['physical_storage'] ?? 0) !== 1) {
            throw new InvalidArgumentException('feedback_auto_physical_sources_ambiguous');
        }
        return NetzfahrplanV4Rueckmeldung::configuration([
            'version' => 1, 'installationId' => $installationId, 'assetId' => trim($assetId),
            'managerId' => $managerId, 'batteryInstanceId' => $batteryId,
            'mode' => 'physical_sum', 'allowEstimatedForTrial' => false,
            'maxAgeSeconds' => $maxAge,
            'maxSkewSeconds' => min(30, $maxAge, $capture['accounting']['maxSkewSeconds']),
            'idleToleranceW' => 0.0, 'trackingToleranceW' => 0.0, 'sources' => $sources,
        ]);
    }
}