<?php

declare(strict_types=1);

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

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

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

        // Auf alle Topics hören
        $this->Subscribe('#');

        $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));

        $this->SendDebug("Publish", "$topic → $payload", 0);
    }

    /* ---------------------------------------------------------
     * REQUEST ACTION (Shelly schalten)
     * ---------------------------------------------------------*/
    public function RequestAction($Ident, $Value)
    {
        $this->SendDebug('RequestAction', "$Ident → " . json_encode($Value), 0);

        if (!str_contains($Ident, '_output_')) {
            throw new Exception("Unknown Ident: " . $Ident);
        }

        // lokale Variable setzen
        $varID = $this->FindVariableByIdent($Ident);
        if ($varID) {
            SetValue($varID, $Value);
        }

        // device + index extrahieren
        [$deviceID, $suffix] = explode('_output_', $Ident, 2);
        $index = intval($suffix);

        // RPC Topic
        $topic = $deviceID . '/rpc';

        // RPC JSON Payload
        $payload = json_encode([
            'id'     => 1,
            'src'    => 'ips',
            'method' => 'Switch.Set',
            'params' => [
                'id' => $index,
                'on' => (bool)$Value
            ]
        ]);

        $this->SendDebug('MQTT SEND', "$topic : $payload", 0);

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

    /* ---------------------------------------------------------
     * RECEIVE MQTT DATA
     * ---------------------------------------------------------*/
    public function ReceiveData($JSONString)
    {
        $this->SendDebug('ReceiveData', $JSONString, 0);

        $data = json_decode($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;
        }

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

        // <deviceID>/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
    {
        $value = ($payload === 'true' || $payload === '1');

        $varID = $this->EnsureBooleanVariable($deviceID, $deviceID . '_online', 'Online');
        SetValue($varID, $value);
    }

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

        $src = $json['src'] ?? '';
        if (!str_starts_with($src, 'shelly')) {
            return;
        }

        // Gerätetyp merken
        $type   = ShellyParser::ExtractType($src);
        $typeID = $this->EnsureStringVariable($deviceID, $deviceID . '_type', 'Typ');
        SetValue($typeID, $type);

        // params mappen
        $params = $json['params'] ?? [];
        $mapped = ShellyParser::MapParams($params);

        /* -------------------------
         * OUTPUTS
         * -------------------------*/
        foreach ($mapped['outputs'] as $index => $value) {
            $ident = $deviceID . '_output_' . $index;
            $name  = 'Output ' . $index;

            $varID = $this->EnsureBooleanVariable($deviceID, $ident, $name);
            SetValue($varID, $value);
        }

        /* -------------------------
         * INPUTS
         * -------------------------*/
        foreach ($mapped['inputs'] as $index => $value) {
            $ident = $deviceID . '_input_' . $index;
            $name  = 'Input ' . $index;

            $varID = $this->EnsureBooleanVariable($deviceID, $ident, $name);
            SetValue($varID, $value);
        }

        /* -------------------------
         * TEMPERATUR
         * -------------------------*/
        if ($mapped['temperature'] !== null) {
            $tempID = $this->EnsureFloatVariable($deviceID, $deviceID . '_temperature', 'Temperatur');
            SetValue($tempID, $mapped['temperature']);
        }
    }

    /* ---------------------------------------------------------
     * HELPER: BOOLEAN VARIABLE
     * ---------------------------------------------------------*/
    private function EnsureBooleanVariable(string $deviceID, string $ident, string $name): int
    {
        $folderID = $this->GetDeviceFolder($deviceID);

        // bestehende Variable?
        foreach (IPS_GetChildrenIDs($folderID) as $cid) {
            $obj = IPS_GetObject($cid);

            if ($obj['ObjectIdent'] === $ident && $obj['ObjectType'] === OBJECTTYPE_VARIABLE) {

                // OUTPUT → immer CustomAction setzen
                if (str_contains($ident, '_output_')) {
                    IPS_SetVariableCustomAction($cid, $this->InstanceID);

                    $var = IPS_GetVariable($cid);
                    if ($var['VariableProfile'] === '' && $var['VariableCustomProfile'] === '') {
                        IPS_SetVariableCustomProfile($cid, '~Switch');
                    }
                }

                return $cid;
            }
        }

        // neue Variable
        $varID = IPS_CreateVariable(0);
        IPS_SetIdent($varID, $ident);
        IPS_SetName($varID, $name);
        IPS_SetParent($varID, $folderID);

        // OUTPUT-Profil + Action
        if (str_contains($ident, '_output_')) {
            IPS_SetVariableCustomAction($varID, $this->InstanceID);
            IPS_SetVariableCustomProfile($varID, '~Switch');
        }

        return $varID;
    }

    /* ---------------------------------------------------------
     * FLOAT VARIABLE
     * ---------------------------------------------------------*/
    private function EnsureFloatVariable(string $deviceID, string $ident, string $name): int
    {
        $folderID = $this->GetDeviceFolder($deviceID);

        foreach (IPS_GetChildrenIDs($folderID) as $cid) {
            $obj = IPS_GetObject($cid);
            if ($obj['ObjectIdent'] === $ident) {
                return $cid;
            }
        }

        $id = $this->RegisterVariableFloat($ident, $name);
        IPS_SetParent($id, $folderID);
        return $id;
    }

    /* ---------------------------------------------------------
     * STRING VARIABLE
     * ---------------------------------------------------------*/
    private function EnsureStringVariable(string $deviceID, string $ident, string $name): int
    {
        $folderID = $this->GetDeviceFolder($deviceID);

        foreach (IPS_GetChildrenIDs($folderID) as $cid) {
            $obj = IPS_GetObject($cid);
            if ($obj['ObjectIdent'] === $ident) {
                return $cid;
            }
        }

        $id = $this->RegisterVariableString($ident, $name);
        IPS_SetParent($id, $folderID);
        return $id;
    }

    /* ---------------------------------------------------------
     * GERÄTE-ORDNER
     * ---------------------------------------------------------*/
    private function GetDeviceFolder(string $deviceID): int
    {
        $folderIdent = 'folder_' . $deviceID;

        foreach (IPS_GetChildrenIDs($this->InstanceID) as $cid) {
            $obj = IPS_GetObject($cid);
            if ($obj['ObjectIdent'] === $folderIdent && $obj['ObjectType'] === OBJECTTYPE_CATEGORY) {
                return $cid;
            }
        }

        // neu anlegen
        $folderID = IPS_CreateCategory();
        IPS_SetParent($folderID, $this->InstanceID);
        IPS_SetName($folderID, $deviceID);
        IPS_SetIdent($folderID, $folderIdent);

        return $folderID;
    }

    /* ---------------------------------------------------------
     * HELPER: VARIABLE FINDEN
     * ---------------------------------------------------------*/
    private function FindVariableByIdent(string $Ident)
    {
        foreach (IPS_GetChildrenIDs($this->InstanceID) as $folder) {
            foreach (IPS_GetChildrenIDs($folder) as $cid) {
                if (IPS_GetObject($cid)['ObjectIdent'] === $Ident) {
                    return $cid;
                }
            }
        }
        return 0;
    }
}

?>