const express = require('express');
const http = require('http');
const socketIo = require('socket.io');
const multer = require('multer');
const path = require('path');

const fs = require('fs');
const uploadDir = './uploads';

if (!fs.existsSync(uploadDir)) {
  fs.mkdirSync(uploadDir);
}

const app = express();
const server = http.createServer(app);
const io = socketIo(server);

app.use(express.static(path.join(__dirname, 'public')));

const storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, 'uploads/');
  },
  filename: function (req, file, cb) {
    cb(null, file.originalname);
  }
});

const upload = multer({ storage: storage });

io.on('connection', (socket) => {
  console.log('A user connected');

  socket.on('chat message', (msg) => {
    io.emit('chat message', msg);
  });

  socket.on('disconnect', () => {
    console.log('User disconnected');
  });
});

app.post('/upload', upload.single('file'), (req, res) => {
  io.emit('file', req.file.originalname);
  res.send('File uploaded successfully');
});

server.listen(3000, () => {
  console.log('Server running on http://localhost:3000');
});