<?php

declare(strict_types=1);

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

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

        // Variable-Auswahl
        $this->RegisterPropertyInteger('VarPowerProduction', 0);
        $this->RegisterPropertyInteger('VarStateOfCharge', 0);
        $this->RegisterPropertyInteger('VarIsRunning', 0);
        $this->RegisterPropertyInteger('VarPositiveSetpointTarget', 0);
        $this->RegisterPropertyInteger('VarNegativeSetpointTarget', 0);

        // Numerische SOC-Grenzen
        $this->RegisterPropertyFloat('MinSOC', 20.0);
        $this->RegisterPropertyFloat('MaxSOC', 90.0);

        // Speicherung des letzten PowerSetpoints
        $this->RegisterPropertyFloat('LastPowerSetpoint', 0.0);

        // Anzeigevariable für Feedback Request
        $this->RegisterVariableString('FeedbackRequestPayload', 'Feedback Request', '', 10);

        // Anzeigevariable für Remote Control Request
        $this->RegisterVariableString('RemoteControlPayload', 'Remote Control Payload', '', 20);

        $this->ConnectParent('{F7A0DD2E-7684-95C0-64C2-D2A9DC47577B}');
    }

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

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

    public function RequestAction($Ident, $Value)
    {
        // Einfach akzeptieren und nichts machen
        return true;
    }

    public function GetConfigurationForm()
    {
        return json_encode([
            "elements" => [

                ["type" => "ValidationTextBox", "name" => "DeviceID", "caption" => "Device ID"],

                ["type" => "NumberSpinner", "name" => "MinSOC", "caption" => "Min SOC (%)"],
                ["type" => "NumberSpinner", "name" => "MaxSOC", "caption" => "Max SOC (%)"],

                ["type" => "SelectVariable", "name" => "VarPowerProduction", "caption" => "Variable – Power Production"],
                ["type" => "SelectVariable", "name" => "VarStateOfCharge", "caption" => "Variable – State of Charge"],
                ["type" => "SelectVariable", "name" => "VarIsRunning", "caption" => "Variable – Is Running"],

                ["type" => "SelectVariable", "name" => "VarPositiveSetpointTarget", "caption" => "Variable – Positive Power Setpoint"],
                ["type" => "SelectVariable", "name" => "VarNegativeSetpointTarget", "caption" => "Variable – Negative Power Setpoint"]
            ]
        ]);
    }

    /* -------------------------------------------------------------------------
     * MQTT SUBSCRIBE
     * ----------------------------------------------------------------------*/
    private function Subscribe(string $topic)
    {
        if (!$this->HasActiveParent()) {
            return;
        }

        $this->SendDataToParent(json_encode([
            "DataID" => "{A1B5C433-4F17-462D-AD71-383F5BBE4F5A}",
            "Type"   => "SUBSCRIBE",
            "Topic"  => $topic
        ]));
    }

    /* -------------------------------------------------------------------------
     * MQTT PUBLISH
     * ----------------------------------------------------------------------*/
    private function Publish(string $topic, string $payload)
    {
        if (!$this->HasActiveParent()) {
            return;
        }

        $this->SendDataToParent(json_encode([
            "DataID"  => "{A1B5C433-4F17-462D-AD71-383F5BBE4F5A}",
            "Type"    => "PUBLISH",
            "Topic"   => $topic,
            "Payload" => $payload
        ]));
    }

    /* -------------------------------------------------------------------------
     * RECEIVE MQTT
     * ----------------------------------------------------------------------*/
    public function ReceiveData($JSONString)
    {
        $data = json_decode($JSONString, true);
        if (!isset($data['Type'])) {
            return;
        }

        $type = $data['Type'];

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

        if ($type !== "MESSAGE") {
            return;
        }

        $topic = $data['Topic'];
        $payload = $data['Payload'];
        $device = $this->ReadPropertyString('DeviceID');

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

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

            $varProd = $this->ReadPropertyInteger('VarPowerProduction');
            $varSOC  = $this->ReadPropertyInteger('VarStateOfCharge');
            $varRun  = $this->ReadPropertyInteger('VarIsRunning');

            $power = ($varProd ? GetValue($varProd) : 0.0);
            $soc   = ($varSOC ? GetValue($varSOC) : 0.0);
            $run   = ($varRun ? GetValue($varRun) : false);

            $min = $this->ReadPropertyFloat('MinSOC');
            $max = $this->ReadPropertyFloat('MaxSOC');

            $isReady = ($run && $soc > $min && $soc < $max);

            $response = [
                "power_production" => $power,
                "state_of_charge"  => $soc,
                "is_running"       => $run,
                "is_ready"         => $isReady,
                "min_soc"          => $min,
                "max_soc"          => $max
            ];

            $this->Publish("feedback-response/$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"])) {
                $power = floatval($json["power_setpoint"]);
                IPS_SetProperty($this->InstanceID, 'LastPowerSetpoint', $power);
                IPS_ApplyChanges($this->InstanceID);

                // Positive oder negativ?
                if ($power > 0) {
                    $varPos = $this->ReadPropertyInteger('VarPositiveSetpointTarget');
                    if ($varPos) {
                        SetValue($varPos, $power);
                    }
                } else {
                    $varNeg = $this->ReadPropertyInteger('VarNegativeSetpointTarget');
                    if ($varNeg) {
                        SetValue($varNeg, $power);
                    }
                }
            }

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

?>