const Api = (() => {
  // Deteksi path API secara otomatis
  const BASE = (() => {
    const path = window.location.pathname;
    const dir  = path.substring(0, path.lastIndexOf('/') + 1);
    return dir + 'api/index.php';
  })();

  async function req(method, path, body=null) {
    // path contoh: '/penduduk' → '?r=penduduk'  |  '/penduduk/123' → '?r=penduduk/123'
    const cleanPath = path.replace(/^\//, '');
    const url = `${BASE}?r=${cleanPath}`;
    const opts = {
      method,
      headers: { 'Content-Type': 'application/json' },
      credentials: 'same-origin',
    };
    if (body) opts.body = JSON.stringify(body);

    const res = await fetch(url, opts);
    const text = await res.text();
    let json;
    try {
      json = JSON.parse(text);
    } catch {
      // PHP mengembalikan HTML/teks error bukan JSON
      const preview = text.substring(0, 200);
      throw new Error(`Server error ${res.status} — bukan JSON: ${preview}`);
    }
    if (!json.success) throw new Error(json.message || 'Terjadi kesalahan');
    return json.data;
  }

  return {
    get:    path       => req('GET',    path),
    post:   (path, b)  => req('POST',   path, b),
    put:    (path, b)  => req('PUT',    path, b),
    delete: path       => req('DELETE', path),
  };
})();