<?php

declare(strict_types=1);

class VGT_Sub extends IPSModule
{
    public function Create()
    {
        parent::Create();
        $this->RegisterPropertyString('DeviceID', '');

        $this->RegisterVariableFloat('PowerProduction', 'Power Production', '', 10);
        $this->EnableAction('PowerProduction');

        $this->RegisterVariableFloat('StateOfCharge', 'State of Charge', '', 11);
        $this->EnableAction('StateOfCharge');

        $this->RegisterVariableBoolean('IsRunning', 'Is Running', '', 12);
        $this->EnableAction('IsRunning');

        $this->RegisterVariableBoolean('IsReady', 'Is Ready', '', 13);
        $this->EnableAction('IsReady');

        $this->RegisterVariableFloat('MinSoc', 'Min SoC', '', 14);
        $this->EnableAction('MinSoc');

        $this->RegisterVariableFloat('MaxSoc', 'Max SoC', '', 15);
        $this->EnableAction('MaxSoc');

        $this->RegisterVariableInteger('PowerSetpoint', 'Power Setpoint', '', 20);
        IPS_SetVariableCustomAction($this->GetIDForIdent('PowerSetpoint'), 0);

        $this->RegisterVariableString('Strategy', 'Strategy', '', 21);
        IPS_SetVariableCustomAction($this->GetIDForIdent('Strategy'), 0);
    }

    public function ForwardData($JSONString)
    {
        $data = json_decode($JSONString, true);

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

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

        if ($topic === "feedback-request/$device") {
            $this->handleFeedback($device);
        }

        if ($topic === "remote-control-request/$device") {
            $this->handleRemote($device, $payload);
        }

        return '';
    }

    private function handleFeedback($device)
    {
        $response = [
            "power_production" => GetValue($this->GetIDForIdent('PowerProduction')),
            "state_of_charge"  => GetValue($this->GetIDForIdent('StateOfCharge')),
            "is_running"       => GetValue($this->GetIDForIdent('IsRunning')),
            "is_ready"         => GetValue($this->GetIDForIdent('IsReady')),
            "min_soc"          => GetValue($this->GetIDForIdent('MinSoc')),
            "max_soc"          => GetValue($this->GetIDForIdent('MaxSoc'))
        ];

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

    private function handleRemote($device, $payload)
    {
        $in = json_decode($payload, true);
        if (!is_array($in)) {
            return;
        }

        if (isset($in['power_setpoint'])) {
            SetValue($this->GetIDForIdent('PowerSetpoint'), (int)$in['power_setpoint']);
        }

        if (isset($in['strategy'])) {
            SetValueString($this->GetIDForIdent('Strategy'), (string)$in['strategy']);
        }

        $this->publish("remote-control-response/$device", json_encode($in));
    }

    private function publish($topic, $payload)
    {
        $this->SendDataToParent(json_encode([
            "DataID"  => "{018EF6B5-AB94-40C6-AA53-46943E824ACF}",
            "Topic"   => $topic,
            "Payload" => $payload
        ]));
    }

    public function RequestAction($Ident, $Value)
    {
        SetValue($this->GetIDForIdent($Ident), $Value);
    }
}

?>