<?php

declare(strict_types=1);

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

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

        // Variable für empfangene Remote-Control-Daten
        $this->RegisterVariableString('RemoteControlPayload', 'Remote Control Payload', '', 1);

        // MQTT Splitter (richtiger Parent)
        $this->ConnectParent("{A5D7A5C5-F2BD-4DA3-9C28-DB6C24A34F3C}");
    }

    public function ApplyChanges()
    {
        parent::ApplyChanges();

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

        if ($device == '') {
            return;
        }

        // DEBUG: Was wird abonniert?
        $this->SendDebug("Subscribe", "Subscribing to feedback-request/$device", 0);
        $this->SendDebug("Subscribe", "Subscribing to remote-control-response/$device", 0);

        // Subscription: Feedback-Request
        $this->SendDataToParent(json_encode([
            "DataID"   => "{A339BCF8-68B7-4A41-A4EF-6A9C55A2B4E3}",
            "Topic"    => "feedback-request/$device",
            "Retain"   => false
        ]));

        // Subscription: Remote-Control-Response
        $this->SendDataToParent(json_encode([
            "DataID"   => "{A339BCF8-68B7-4A41-A4EF-6A9C55A2B4E3}",
            "Topic"    => "remote-control-response/$device",
            "Retain"   => false
        ]));
    }

    // Wird aufgerufen wenn MQTT-Daten hereinkommen
    public function ReceiveData($JSONString)
    {
        $data = json_decode($JSONString, true);
        $topic = $data['Topic'] ?? '';
        $payload = $data['Payload'] ?? '';

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

        // 1️⃣ Client fragt Feedback an → Modul sendet feste Antwort zurück
        if ($topic === "feedback-request/$device") {

            $this->SendDebug("Receive", "Feedback request received", 0);

            $response = [
                "power_production" => 123,
                "is_ready"         => true,
                "is_running"       => true,
                "state_of_charge"  => 50,
                "min_soc"          => 10,
                "max_soc"          => 90
            ];

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

        // 2️⃣ Remote-Control-Response empfangen
        if ($topic === "remote-control-response/$device") {

            $this->SendDebug("Receive", "Remote control payload received", 0);

            // In Variable speichern
            $this->SetValue('RemoteControlPayload', $payload);

            // Optional weiterverarbeiten
            $this->HandleRemoteControl($payload);
        }
    }

    private function Publish(string $topic, string $payload)
    {
        $this->SendDebug("Publish", "Topic: $topic Payload: $payload", 0);

        // MQTT Publish an Splitter senden
        $this->SendDataToParent(json_encode([
            "DataID"  => "{7F7632D9-A122-4C43-8C21-A4943C1BFB79}",
            "Topic"   => $topic,
            "Payload" => $payload,
            "Retain"  => false
        ]));
    }

    // Methode für spätere Aktion
    protected function HandleRemoteControl(string $payload)
    {
        $this->SendDebug("RemoteControl", "Processing payload: $payload", 0);

        // → Hier kann später custom Code rein
    }
}