<?php

namespace App\Support;

/**
 * The address smart-home devices should point at to reach this server's MQTT broker.
 *
 * We can't read the Docker host's LAN IP from inside the container reliably, so we derive it
 * from the request host — the address the user opened HomeOS at is, by definition, this server's
 * reachable LAN address. `MQTT_DEVICE_HOST` overrides it only if that ever guesses wrong.
 */
class HostAddress
{
    public static function port(): int
    {
        return (int) config('homeos.mqtt.port', 1883);
    }

    /** "host:port" for the device's MQTT server field. */
    public static function broker(): string
    {
        $override = config('homeos.mqtt.device_host');

        if (filled($override)) {
            return str_contains($override, ':') ? $override : $override.':'.self::port();
        }

        return request()->getHost().':'.self::port();
    }
}