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

const PORT = process.env.PORT || 3000;
const PUBLIC_DIR = path.join(__dirname, 'dist');

const getContentType = (filePath) => {
    const ext = path.extname(filePath).toLowerCase();
    const types = {
        '.html': 'text/html',
        '.js': 'text/javascript',
        '.css': 'text/css',
        '.json': 'application/json',
        '.png': 'image/png',
        '.jpg': 'image/jpg',
        '.gif': 'image/gif',
        '.svg': 'image/svg+xml',
        '.ico': 'image/x-icon',
    };
    return types[ext] || 'application/octet-stream';
};

const server = http.createServer((req, res) => {
    let filePath = path.join(PUBLIC_DIR, req.url === '/' ? 'index.html' : req.url);

    fs.stat(filePath, (err, stats) => {
        if (err || !stats.isFile()) {
            // SPA Fallback: serve index.html for unknown paths
            filePath = path.join(PUBLIC_DIR, 'index.html');
        }

        fs.readFile(filePath, (err, content) => {
            if (err) {
                res.writeHead(500);
                res.end('Server Error');
            } else {
                res.writeHead(200, { 'Content-Type': getContentType(filePath) });
                res.end(content, 'utf-8');
            }
        });
    });
});

server.listen(PORT, () => {
    console.log(`Server running on port ${PORT}`);
});