const socketIO = require('socket.io');
const handlers = require('./handlers');

/**
 * Initialize Socket.IO
 * @param {object} server - HTTP server instance
 * @returns {object} Socket.IO instance
 */
const initializeSocket = (server) => {
  const io = socketIO(server, {
    cors: {
      origin: '*',
      methods: ['GET', 'POST']
    }
  });

  // Authentication middleware for socket connections
  io.use((socket, next) => {
    // Simple authentication can be added here if needed
    // const token = socket.handshake.auth.token;
    // if (token validation logic) next();
    // else next(new Error('Authentication error'));
    next();
  });

  // Handle connection
  io.on('connection', (socket) => {
    console.log(`New client connected: ${socket.id}`);

    // Register event handlers
    handlers.registerHandlers(io, socket);

    // Handle disconnection
    socket.on('disconnect', () => {
      console.log(`Client disconnected: ${socket.id}`);
    });
  });

  return io;
};

module.exports = initializeSocket;