<?php
namespace App\Console\Commands;

use Illuminate\Console\Command;
use PhpMqtt\Client\ConnectionSettings;
use PhpMqtt\Client\MqttClient;

class MqttMock extends Command
{
    protected $signature = 'mqtt:mock
        {--device=eltern : Device slug}
        {--interval=10 : Seconds between publishes}
        {--duration=0 : Stop after N seconds (0 = forever)}';
    protected $description = 'Publish mock heating data to MQTT';

    public function handle(): int
    {
        $c = $this->makeClient();
        $dev = $this->option('device');
        $iv = (int) $this->option('interval');
        $dur = (int) $this->option('duration');
        $end = $dur > 0 ? time()+$dur : null;
        $this->info("Mock $dev every {$iv}s");
        while (true) {
            if ($end && time() >= $end) break;
            [$b,$t] = $this->generate();
            $c->publish("ems-esp/$dev/boiler", json_encode($b), 0);
            $c->publish("ems-esp/$dev/thermostat", json_encode($t), 0);
            $this->line(now()->format('H:i:s')." flow={$b['curflowtemp']} burn={$b['burngas']} ist={$t['hc1_currtemp']}");
            sleep($iv);
        }
        $c->disconnect();
        return 0;
    }

    private function generate(): array
    {
        $h = (float)now()->format('G') + (int)now()->format('i')/60.0;
        $heat = ($h >= 6 && $h < 22);
        $burn = $heat && (rand(0,100) < 60) ? 1 : 0;
        $out = 5 + 8*sin(($h-3)/24*2*M_PI) + rand(-10,10)/10;
        $set = $heat ? 21.0 : 18.0;
        $ft = $burn ? 55 + (15-$out)*0.8 : 38;
        return [[
            'curflowtemp'=>round($ft + rand(-15,15)/10,1),
            'selflowtemp'=>round($ft,1),
            'burngas'=>$burn,
            'wwseltemp'=>55,
            'wwcurtemp'=>round(55-rand(0,30)/10,1),
            'outdoortemp'=>round($out,1),
        ],[
            'hc1_seltemp'=>$set,
            'hc1_currtemp'=>round($set+rand(-6,6)/10,1),
            'hc1_mode'=>$heat?'auto':'night',
        ]];
    }

    private function makeClient(): MqttClient
    {
        $c = new MqttClient(env('MQTT_HOST'), (int)env('MQTT_PORT',8883), 'heizung-mock');
        $cs = (new ConnectionSettings)
            ->setUsername(env('MQTT_MOCK_USERNAME'))
            ->setPassword(env('MQTT_MOCK_PASSWORD'))
            ->setUseTls(true)
            ->setTlsVerifyPeer(true)
            ->setTlsVerifyPeerName(true)
            ->setTlsCertificateAuthorityPath(env('MQTT_CA_PATH','/etc/ssl/certs'))
            ->setKeepAliveInterval(60)
            ->setConnectTimeout(10);
        $c->connect($cs, true);
        return $c;
    }
}