<?php

namespace App\Net;

use JumPHP\WebRtc\WebRtc;

/** Which WebRTC this computer has; without one, the simulated backend (LocalBackend) so the screens of this game still work. */
final class Rtc
{
    /** 'browser', 'native' or 'simulated' */
    public static function prepare(WebRtc $webrtc): string
    {
        if (!$webrtc->isSupported()) {
            $webrtc->setBackend(new LocalBackend());
        }
        return $webrtc->backendName();
    }

    /** Can this computer reach another one (online play)? Not with the simulation. */
    public static function real(WebRtc $webrtc): bool
    {
        return self::prepare($webrtc) !== 'simulated';
    }

    /** The backend in words (a key of lang.yaml). */
    public static function describe(string $backend): string
    {
        return match ($backend) {
            'browser' => 'the browser (RTCPeerConnection)',
            'native' => 'this computer (GStreamer)',
            default => 'simulated (no WebRTC on this computer)',
        };
    }
}