<?php
require __DIR__ . "/vendor/autoload.php";

use Agence104\LiveKit\AccessToken;
use Agence104\LiveKit\AccessTokenOptions;
use Agence104\LiveKit\VideoGrant;
use Agence104\LiveKit\WebhookReceiver;
use Dotenv\Dotenv;

Dotenv::createImmutable(__DIR__)->safeLoad();

header("Access-Control-Allow-Origin: *");
header("Content-Type: application/json; charset=UTF-8");
header("Access-Control-Allow-Methods: OPTIONS,POST");
header("Access-Control-Allow-Headers: Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With");

$LIVEKIT_API_KEY = $_ENV["LIVEKIT_API_KEY"] ?? "devkey";
$LIVEKIT_API_SECRET = $_ENV["LIVEKIT_API_SECRET"] ?? "secret";

if (isset($_SERVER['REQUEST_METHOD']) && $_SERVER["REQUEST_METHOD"] === "POST" && $_SERVER["PATH_INFO"] === "/token") {
    $data = json_decode(file_get_contents("php://input"), true);

    $roomName = $data["roomName"] ?? null;
    $participantName = $data["participantName"] ?? null;

    if (!$roomName || !$participantName) {
        http_response_code(400);
        echo json_encode("roomName and participantName are required");
        exit();
    }

    $tokenOptions = (new AccessTokenOptions())
        ->setIdentity($participantName);
    $videoGrant = (new VideoGrant())
        ->setRoomJoin()
        ->setRoomName($roomName);
    $token = (new AccessToken($LIVEKIT_API_KEY, $LIVEKIT_API_SECRET))
        ->init($tokenOptions)
        ->setGrant($videoGrant)
        ->toJwt();

    echo json_encode($token);
    exit();
}

$webhookReceiver = (new WebhookReceiver($LIVEKIT_API_KEY, $LIVEKIT_API_SECRET));

if (isset($_SERVER['REQUEST_METHOD']) && $_SERVER["REQUEST_METHOD"] === "POST" && $_SERVER["PATH_INFO"] === "/webhook") {
    $headers = getallheaders();
    $authHeader = $headers['Authorization'];
    $body = file_get_contents("php://input");
    try {
        $event = $webhookReceiver->receive($body, $authHeader);
        error_log('LiveKit Webhook:');
        error_log(print_r($event->getEvent(), true));
        exit();
    } catch (Exception $e) {
        http_response_code(401);
        echo "Error validating webhook event";
        echo json_encode($e->getMessage());
        exit();
    }
}

echo json_encode("Unsupported endpoint or method");
exit();