import http from 'http';
import https from 'https';
import fs from 'fs';
import path from 'path';
import { fileURLToPath } from 'url';

const PORT = 8080;
const __dir = path.dirname(fileURLToPath(import.meta.url));

const server = http.createServer((req, res) => {
  res.setHeader('Access-Control-Allow-Origin', '*');
  res.setHeader('Access-Control-Allow-Headers', 'Content-Type, Authorization');

  if (req.method === 'OPTIONS') { res.writeHead(204); res.end(); return; }

  // Serve any .html file in the same directory
  if (req.url === '/' || req.url.endsWith('.html')) {
    const filename = req.url === '/' ? 'booking-checker.html' : req.url.slice(1);
    const filepath = path.join(__dir, filename);
    if (fs.existsSync(filepath)) {
      res.writeHead(200, { 'Content-Type': 'text/html' });
      fs.createReadStream(filepath).pipe(res);
    } else {
      res.writeHead(404); res.end('Not found');
    }
    return;
  }

  // Proxy /proxy?url=<encoded-api-url>
  if (req.url.startsWith('/proxy?url=')) {
    const target = decodeURIComponent(req.url.slice('/proxy?url='.length));
    const parsed = new URL(target);
    const mod = parsed.protocol === 'https:' ? https : http;
    const options = {
      hostname: parsed.hostname,
      port: parsed.port || (parsed.protocol === 'https:' ? 443 : 80),
      path: parsed.pathname + parsed.search,
      method: req.method,
      headers: { ...req.headers, host: parsed.hostname },
    };
    const proxy = mod.request(options, (apiRes) => {
      res.writeHead(apiRes.statusCode, apiRes.headers);
      apiRes.pipe(res);
    });
    proxy.on('error', (e) => { res.writeHead(502); res.end(e.message); });
    req.pipe(proxy);
    return;
  }

  res.writeHead(404); res.end();
});

server.listen(PORT, () => console.log(`Booking checker: http://localhost:${PORT}/booking-checker.html`));