let io = null;

module.exports = {
  init: (httpServer) => {
    io = require('socket.io')(httpServer, {
      cors: {
        origin: "*",
        methods: ["GET", "POST"]
      }
    });

    io.engine.on('connection_error', (err) => {
      try {
        const ctx = err && err.context ? err.context : null;
        const req = ctx && ctx.req ? ctx.req : null;
        const headers = req && req.headers ? req.headers : {};
        console.log('Socket connection error:', {
          code: err && err.code,
          message: err && err.message,
          url: req && req.url,
          transport: ctx && ctx.transport,
          host: headers && headers.host,
          origin: headers && headers.origin
        });
      } catch (e) {
        console.log('Socket connection error');
      }
    });
    
    io.on('connection', (socket) => {
      console.log('Client connected:', socket.id);
      socket.on('disconnect', () => {
        console.log('Client disconnected:', socket.id);
      });
    });
    
    return io;
  },
  getIO: () => {
    if (!io) {
      throw new Error("Socket.io not initialized!");
    }
    return io;
  },
  emit: (event, data) => {
      if (io) {
          io.emit(event, data);
      }
  }
};