<?php

declare(strict_types=1);

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

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

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

        // MQTT-Server verbinden
        $this->ConnectParent("{7F8A48DD-F8AD-4F9C-8E6B-9E4D92DDB8F9}");

        // Status prüfen
        if ($this->ReadPropertyString("DeviceID") == "") {
            $this->SetStatus(104);
        } else {
            $this->SetStatus(102);
        }
    }

    /** Wird vom MQTT Server aufgerufen */
    public function ReceiveData($JSONString)
    {
        $data = json_decode($JSONString, true);

        // Beispiel MQTT-Datenformat:
        // [
        //   "Topic" => "...",
        //   "Payload" => "..."
        // ]

        if (!isset($data["Topic"]) || !isset($data["Payload"])) {
            return;
        }

        $topic = $data["Topic"];
        $value = $data["Payload"];

        IPS_LogMessage("Int_VGT", "MQTT RX: $topic → $value");

        $this->HandleIncoming($topic, $value);
    }

    /** Deine Logik */
    private function HandleIncoming(string $topic, string $value)
    {
        $deviceID = $this->ReadPropertyString("DeviceID");
        $gateway = $this->InstanceID;

        // Feedback Request
        if ($topic === "feedback-request/$deviceID") {

            $response = json_encode([
                "status" => "ok",
                "timestamp" => time()
            ]);

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

        // Remote Control
        if ($topic === "remote-control-response/$deviceID") {
            $this->Publish("remote-control-feedback/$deviceID", $value);
            return;
        }
    }

    /** MQTT Publish Wrapper */
    private function Publish(string $topic, string $payload)
    {
        $msg = [
            "Topic"   => $topic,
            "Payload" => $payload,
            "Retain"  => false,
            "QoS"     => 0
        ];

        $this->SendDataToParent(json_encode(["DataID" => "{7F8A48DD-F8AD-4F9C-8E6B-9E4D92DDB8F9}", "Packet" => $msg]));
    }
}

?>