const http = require('http');
const fs = require('fs');
const path = require('path');

const server = http.createServer((req, res) => {
    const filePath = req.url === '/' ? 'index.html' : req.url.slice(1);
    const ext = path.extname(filePath);
    const mimeTypes = {
        '.html': 'text/html',
        '.js': 'application/javascript',
        '.css': 'text/css'
    };
    
    fs.readFile(path.join(process.cwd(), filePath), (err, data) => {
        if (err) {
            res.writeHead(404);
            res.end('Not Found');
            return;
        }
        res.writeHead(200, { 'Content-Type': mimeTypes[ext] || 'text/plain' });
        res.end(data);
    });
});

server.listen(0, () => {
    const port = server.address().port;
    console.log('Server running on http://localhost:' + port);
});