import { FastifyPluginAsync } from 'fastify';
import { verifyAccessToken } from '../../plugins/auth.js';
import { SignalingManager } from '../../services/signaling-manager.service.js';

export function createSignalingRoutes(signalingManager: SignalingManager): FastifyPluginAsync {
  const signalingRoutes: FastifyPluginAsync = async (fastify) => {
    // GET /signaling/ws?token=<accessToken>
    fastify.get('/signaling/ws', { websocket: true }, async (socket, request) => {
      const url = new URL(request.url, `http://${request.headers.host}`);
      const token = url.searchParams.get('token');

      if (!token) {
        socket.send(JSON.stringify({ type: 'error', error: 'Missing token' }));
        socket.close();
        return;
      }

      let userId: string;
      try {
        userId = await verifyAccessToken(token);
      } catch {
        socket.send(JSON.stringify({ type: 'error', error: 'Invalid or expired token' }));
        socket.close();
        return;
      }

      request.log.info({ userId }, 'Signaling WebSocket connected');
      await signalingManager.handleConnection(userId, socket);
    });
  };

  return signalingRoutes;
}