// src/server.mjs
import { createServer } from 'node:http';

export function createAppServer() {
  return createServer((request, response) => {
    // The deployed runtime's abort signal: end the response when it fires.
    request.signal?.addEventListener('abort', () => response.destroy(), { once: true });
    const send = (status, type, body) => {
      if (response.destroyed) return;
      response.writeHead(status, { 'content-type': type });
      response.end(body);
    };
    // A target that does not parse as a URL names no route, so it is answered 404 below.
    let pathname = null;
    try {
      pathname = new URL(request.url, 'http://localhost').pathname;
    } catch {}
    if (request.method === 'GET' && pathname === '/health') return send(200, 'application/json', JSON.stringify({ ok: true }));
    if (request.method === 'GET' && pathname === '/api/hello') return send(200, 'text/plain; charset=utf-8', 'hello world');
    send(404, 'application/json', JSON.stringify({ error: 'not_found' }));
  });
}