import http from 'node:http';
import { fileURLToPath } from 'node:url';
import { handleApi } from './api.js';
import { SECURITY_HEADERS } from './security.js';
import { createStaticHandler } from './static.js';

const PORT = Number(process.env.PORT) || 8080;
const HOST = process.env.HOST || '0.0.0.0';
const PUBLIC_DIR = fileURLToPath(new URL('../public/', import.meta.url));

const serveStatic = createStaticHandler(PUBLIC_DIR);

const server = http.createServer(async (req, res) => {
  try {
    if (req.method !== 'GET' && req.method !== 'HEAD') {
      res.writeHead(405, { ...SECURITY_HEADERS, Allow: 'GET, HEAD' });
      return res.end();
    }

    const { pathname } = new URL(req.url, 'http://localhost');

    if (pathname === '/healthz') {
      res.writeHead(200, { ...SECURITY_HEADERS, 'Content-Type': 'text/plain' });
      return res.end('ok');
    }

    if (pathname.startsWith('/api/')) {
      const payload = await handleApi(PUBLIC_DIR, pathname);
      if (payload === undefined) {
        res.writeHead(404, { ...SECURITY_HEADERS, 'Content-Type': 'application/json' });
        return res.end('{"error":"not_found"}');
      }
      res.writeHead(200, {
        ...SECURITY_HEADERS,
        'Content-Type': 'application/json; charset=utf-8',
        'Cache-Control': 'no-store',
      });
      return res.end(req.method === 'HEAD' ? undefined : JSON.stringify(payload));
    }

    return await serveStatic(req, res, pathname, SECURITY_HEADERS);
  } catch (err) {
    console.error(err);
    if (!res.headersSent) res.writeHead(500, SECURITY_HEADERS);
    res.end();
  }
});

server.listen(PORT, HOST, () => console.log(`Idle Clicker listening on http://${HOST}:${PORT}`));

for (const signal of ['SIGINT', 'SIGTERM']) {
  process.on(signal, () => server.close(() => process.exit(0)));
}