<?php

declare(strict_types=1);

require_once __DIR__ . '/libs/ShellyParser.php';

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

        // Verbindung zum MQTT-Server herstellen
        $this->ConnectParent('{C6D2AEB3-6E1F-4B2E-8E69-3A1A00246850}');

        // Auf alle Topics lauschen, Filter machen wir selbst
        $this->Subscribe('#');

        // Debug-Property
        $this->RegisterPropertyBoolean('Debug', false);
    }

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

        $this->ConnectParent('{C6D2AEB3-6E1F-4B2E-8E69-3A1A00246850}');
        $this->Subscribe('#');
    }

    /* ---------------------------------------------------------
     * MQTT SUBSCRIBE
     * ---------------------------------------------------------*/
    private function Subscribe(string $topic): void
    {
        $packet = [
            'PacketType'       => 8,
            'QualityOfService' => 0,
            'Retain'           => false,
            'Topic'            => $topic,
            'Payload'          => ''
        ];

        $this->SendDataToParent(json_encode([
            'DataID' => '{043EA491-0325-4ADD-8FC2-A30C8EEB4D3F}'
        ] + $packet));
    }

    /* ---------------------------------------------------------
     * MQTT PUBLISH
     * ---------------------------------------------------------*/
    private function Publish(string $topic, string $payload): void
    {
        $packet = [
            'PacketType'       => 3,
            'QualityOfService' => 0,
            'Retain'           => false,
            'Topic'            => $topic,
            'Payload'          => $payload
        ];

        $this->SendDataToParent(json_encode([
            'DataID' => '{043EA491-0325-4ADD-8FC2-A30C8EEB4D3F}'
        ] + $packet));

        if ($this->ReadPropertyBoolean('Debug')) {
            IPS_LogMessage('Shelly_Parser_MQTT', 'Publish: ' . $topic . ' -> ' . $payload);
        }
    }

    /* ---------------------------------------------------------
     * RequestAction → Schalten von Outputs
     * ---------------------------------------------------------*/
    public function RequestAction($Ident, $Value)
    {
        // Wert lokal setzen
        $this->SetValue($Ident, $Value);

        // Wir erwarten Ident im Format: "<DeviceID>_output"
        if (str_ends_with($Ident, '_output')) {
            $deviceID = substr($Ident, 0, -strlen('_output'));

            $topic = $deviceID . '/rpc/Switch.Set';
            $payload = json_encode([
                'id' => 0,
                'on' => (bool)$Value
            ]);

            $this->Publish($topic, $payload);
        }
    }

    /* ---------------------------------------------------------
     * RECEIVE MQTT DATA
     * ---------------------------------------------------------*/
    public function ReceiveData($JSONString)
    {
        if ($this->ReadPropertyBoolean('Debug')) {
            IPS_LogMessage('Shelly_Parser_MQTT', 'ReceiveData: ' . $JSONString);
        }

        $data = json_decode($JSONString, true);
        if (!is_array($data)) {
            return;
        }

        $topic   = $data['Topic']   ?? '';
        $payload = $data['Payload'] ?? '';

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

        $parts = explode('/', $topic);
        $deviceID = $parts[0] ?? '';

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

        // <GeräteID>/online
        if ((isset($parts[1])) && ($parts[1] === 'online')) {
            $this->HandleOnline($deviceID, $payload);
            return;
        }

        // <GeräteID>/events/rpc
        if ((isset($parts[1]) && $parts[1] === 'events') &&
            (isset($parts[2]) && $parts[2] === 'rpc')) {
            $this->HandleRPC($deviceID, $payload);
            return;
        }
    }

    /* ---------------------------------------------------------
     * ONLINE-STATUS
     * ---------------------------------------------------------*/
    private function HandleOnline(string $deviceID, string $payload): void
    {
        $ident = $deviceID . '_online';
        $name  = $deviceID . ' Online';

        $this->EnsureBooleanVariable($ident, $name);

        $value = ($payload === 'true' || $payload === '1');
        $this->SetValue($ident, $value);

        if ($this->ReadPropertyBoolean('Debug')) {
            IPS_LogMessage('Shelly_Parser_MQTT', sprintf(
                'Online-Status %s -> %s',
                $deviceID,
                $value ? 'true' : 'false'
            ));
        }
    }

    /* ---------------------------------------------------------
     * RPC-EVENTS
     * ---------------------------------------------------------*/
    private function HandleRPC(string $deviceID, string $payload): void
    {
        $json = json_decode($payload, true);
        if (!is_array($json)) {
            return;
        }

        $src = $json['src'] ?? '';
        if (!is_string($src) || !str_starts_with($src, 'shelly')) {
            // kein Shelly-Gerät → ignorieren
            return;
        }

        // Typ/Modell aus src extrahieren
        $type = ShellyParser::ExtractType($src);

        // Typ-Variable
        $typeIdent = $deviceID . '_type';
        $this->EnsureStringVariable($typeIdent, $deviceID . ' Typ');
        $this->SetValue($typeIdent, $type);

        // params parsen
        $params = $json['params'] ?? [];
        if (!is_array($params)) {
            return;
        }

        $mapped = ShellyParser::MapParams($params);

        // input
        if (array_key_exists('input', $mapped)) {
            $ident = $deviceID . '_input';
            $this->EnsureBooleanVariable($ident, $deviceID . ' Input');
            $this->SetValue($ident, (bool)$mapped['input']);
        }

        // output
        if (array_key_exists('output', $mapped)) {
            $ident = $deviceID . '_output';
            $this->EnsureBooleanVariable($ident, $deviceID . ' Output');
            $this->EnableAction($ident);
            $this->SetValue($ident, (bool)$mapped['output']);
        }

        // temperature
        if (array_key_exists('temperature', $mapped)) {
            $ident = $deviceID . '_temperature';
            $this->EnsureFloatVariable($ident, $deviceID . ' Temperatur');
            $this->SetValue($ident, (float)$mapped['temperature']);
        }

        if ($this->ReadPropertyBoolean('Debug')) {
            IPS_LogMessage('Shelly_Parser_MQTT', sprintf(
                'RPC von %s (Typ %s) → %s',
                $deviceID,
                $type,
                json_encode($mapped)
            ));
        }
    }

    /* ---------------------------------------------------------
     * Helper für Variablen
     * ---------------------------------------------------------*/
    private function EnsureBooleanVariable(string $ident, string $name): void
    {
        $id = @$this->GetIDForIdent($ident);
        if ($id === false) {
            $this->RegisterVariableBoolean($ident, $name);
        }
    }

    private function EnsureFloatVariable(string $ident, string $name): void
    {
        $id = @$this->GetIDForIdent($ident);
        if ($id === false) {
            $this->RegisterVariableFloat($ident, $name);
        }
    }

    private function EnsureStringVariable(string $ident, string $name): void
    {
        $id = @$this->GetIDForIdent($ident);
        if ($id === false) {
            $this->RegisterVariableString($ident, $name);
        }
    }
}
?>