server.js

const express = require('express');
const http = require('http');
const { Server } = require('socket.io');

// Setup basic Express app
const app = express();
const server = http.createServer(app);

// Setup Socket.IO server
const io = new Server(server, {
  cors: {
    origin: '*', // Allow all origins (use cautiously in prod)
    methods: ['GET', 'POST'],
  }
});

// Handle socket connections
io.on('connection', (socket) => {
  console.log('✅ A user connected:', socket.id);

  // Handle incoming chat messages
  socket.on('chat message', (msg) => {
    console.log('💬 Received:', msg);
    io.emit('chat message', "Hello " + msg); // broadcast to all clients
  });

  // Handle disconnection
  socket.on('disconnect', () => {
    console.log('❌ A user disconnected:', socket.id);
  });
});

// Start the server
const PORT = 3000;
server.listen(PORT, () => {
  console.log(`🚀 Server is running on http://localhost:${PORT}`);
});