<?php
declare(strict_types=1);
/**
 * SFU rooms API
 *  GET  /api/rooms          — list active rooms
 *  POST /api/rooms          — create room  (body: {name, purpose})
 *  DELETE /api/rooms/{id}   — close room
 */
require_once dirname(__DIR__, 2) . '/src/bootstrap.php';

$user   = sfuRequireAuth();
$method = $_SERVER['REQUEST_METHOD'] ?? 'GET';
$path   = trim(parse_url($_SERVER['REQUEST_URI'] ?? '', PHP_URL_PATH) ?? '', '/');
$parts  = explode('/', $path);
$roomId = (int) ($parts[array_key_last($parts)] ?? 0);

$repo   = new \AndroidCast\Sfu\SfuRoomRepository(sfuPdo());
$janus  = janusClient();

if ($method === 'GET') {
    sfuJsonOk(['rooms' => $repo->listActive()]);
}

if ($method === 'POST') {
    $input = json_decode(file_get_contents('php://input'), true) ?? [];
    $name  = trim((string) ($input['name'] ?? 'Room ' . date('H:i')));
    $purp  = trim((string) ($input['purpose'] ?? 'screen_cast'));

    /* Allocate a Janus session + handle to create the VideoRoom */
    $sid = $janus->createSession();
    if (!$sid) { sfuJsonErr('Janus unreachable'); }
    $hid = $janus->attachVideoRoom($sid);
    if (!$hid) { sfuJsonErr('Janus attach failed'); }

    $janusRoomId = mt_rand(1_000_000, 9_999_999);
    $ok = $janus->createRoom($sid, $hid, $janusRoomId, [
        'description' => $name,
        'videocodec'  => 'vp8,h264',
        'audiocodec'  => 'opus',
        'bitrate'     => 1024000,
    ]);
    if (!$ok) { sfuJsonErr('Janus room creation failed'); }

    $id = $repo->createRoom($janusRoomId, (int) $user['id'], $name, $purp);
    sfuJsonOk(['room' => ['id' => $id, 'janus_room_id' => $janusRoomId, 'name' => $name]]);
}

if ($method === 'DELETE' && $roomId > 0) {
    $row = $repo->getByJanusId($roomId) ?? sfuJsonErr('room not found', 404);
    /* Best-effort Janus destroy */
    $sid = $janus->createSession();
    if ($sid) {
        $hid = $janus->attachVideoRoom($sid);
        if ($hid) { $janus->destroyRoom($sid, $hid, $roomId); }
    }
    $repo->closeRoom((int) $row['id']);
    sfuJsonOk(['destroyed' => true]);
}

sfuJsonErr('method not allowed', 405);