<?php

declare(strict_types=1);

class VGT_Sub extends IPSModule
{
    public function Create()
    {
        parent::Create();

        $this->RegisterPropertyString("DeviceID", "");

        // --- Variablen für Feedback ---
        $this->RegisterVariableFloat("PowerProduction", "Power Production", "", 10);
        $this->RegisterVariableBoolean("IsReady", "Is Ready", "", 11);
        $this->RegisterVariableBoolean("IsRunning", "Is Running", "", 12);
        $this->RegisterVariableFloat("StateOfCharge", "State of Charge", "", 13);
        $this->RegisterVariableFloat("MinSOC", "Min SOC", "", 14);
        $this->RegisterVariableFloat("MaxSOC", "Max SOC", "", 15);

        // --- Variablen für Remote Control ---
        $this->RegisterVariableFloat("PowerSetpoint", "Power Setpoint", "", 20);
        $this->RegisterVariableString("Strategy", "Strategy", "", 21);

        // Debug-Variablen
        $this->RegisterVariableString("FeedbackRequestPayload", "Feedback Request", "", 90);
        $this->RegisterVariableString("RemoteControlPayload", "Remote Control Request", "", 91);

        // MQTT Splitter (NUR dieser ist korrekt)
        $this->ConnectParent("{F7A0DD2E-7684-95C0-64C2-D2A9DC47577B}");
    }

    public function ApplyChanges()
    {
        parent::ApplyChanges();
        $this->ConnectParent("{F7A0DD2E-7684-95C0-64C2-D2A9DC47577B}");
    }

    public function RequestAction($Ident, $Value)
    {
        SetValue($this->GetIDForIdent($Ident), $Value);
    }


    /* =====================================================================================
     * MQTT Funktionen
     * ===================================================================================== */

    private function Subscribe(string $topic)
    {
        $this->SendDataToParent(json_encode([
            "DataID" => "{F7A0DD2E-7684-95C0-64C2-D2A9DC47577B}",
            "Buffer" => [
                "Topic" => $topic,
                "QualityOfService" => 0
            ]
        ]));
    }

    private function Publish(string $topic, string $payload)
    {
        $this->SendDataToParent(json_encode([
            "DataID" => "{F7A0DD2E-7684-95C0-64C2-D2A9DC47577B}",
            "Buffer" => [
                "Command" => "PUBLISH",
                "Topic"   => $topic,
                "Payload" => $payload,
                "Retain"  => false,
                "QualityOfService" => 0
            ]
        ]));
    }


    /* =====================================================================================
     * ReceiveData – erkennt NUR das tatsächliche Splitter-Format
     * ===================================================================================== */
    public function ReceiveData($JSONString)
    {
        $data = json_decode($JSONString, true);
        if (!isset($data["Buffer"])) return;

        $buf = $data["Buffer"];

        /* CONNECTED? → Dann subscriben */
        if (isset($buf["Message"]) && $buf["Message"] === "MQTT_CONNECTED") {

            $dev = $this->ReadPropertyString("DeviceID");
            if ($dev) {
                $this->Subscribe("feedback-request/$dev");
                $this->Subscribe("remote-control-request/$dev");
            }
            return;
        }

        /* Normale MQTT Message */
        if (!isset($buf["Topic"]) || !isset($buf["Payload"])) return;

        $topic = $buf["Topic"];
        $payload = $buf["Payload"];

        $device = $this->ReadPropertyString("DeviceID");

        /* =====================================================================================
         * FEEDBACK REQUEST
         * ===================================================================================== */
        if ($topic === "feedback-request/$device") {

            $this->SetValue("FeedbackRequestPayload", $payload);

            $response = [
                "power_production" => GetValueFloat($this->GetIDForIdent("PowerProduction")),
                "is_ready"         => GetValueBoolean($this->GetIDForIdent("IsReady")),
                "is_running"       => GetValueBoolean($this->GetIDForIdent("IsRunning")),
                "state_of_charge"  => GetValueFloat($this->GetIDForIdent("StateOfCharge")),
                "min_soc"          => GetValueFloat($this->GetIDForIdent("MinSOC")),
                "max_soc"          => GetValueFloat($this->GetIDForIdent("MaxSOC")),
            ];

            $this->Publish("feedback-response/$device", json_encode($response));
            return;
        }

        /* =====================================================================================
         * REMOTE CONTROL REQUEST
         * ===================================================================================== */
        if ($topic === "remote-control-request/$device") {

            $this->SetValue("RemoteControlPayload", $payload);

            $json = json_decode($payload, true);
            if (!is_array($json)) return;

            if (isset($json["power_setpoint"])) {
                SetValueFloat($this->GetIDForIdent("PowerSetpoint"), floatval($json["power_setpoint"]));
            }

            if (isset($json["strategy"])) {
                SetValueString($this->GetIDForIdent("Strategy"), strval($json["strategy"]));
            }

            $this->Publish("remote-control-response/$device", json_encode($json));
            return;
        }
    }
}

?>