/**
 * Checks a running Site from the outside, the way a customer and a phone would
 * meet it. Read-only: it never signs in and never writes.
 *
 *   npm run check-site -- https://menu-new.hopsngrains.com
 *
 * Exits non-zero if anything fails, so it can gate a cutover.
 */

const base = (process.argv[2] ?? 'http://127.0.0.1:3000').replace(/\/$/, '');

interface Result {
  name: string;
  ok: boolean;
  detail: string;
}

const results: Result[] = [];

function record(name: string, ok: boolean, detail: string): void {
  results.push({ name, ok, detail });
}

async function request(path: string): Promise<Response> {
  return fetch(`${base}${path}`, { redirect: 'manual' });
}

async function checkPage(path: string, expected: string[]): Promise<string | null> {
  let response: Response;
  try {
    response = await request(path);
  } catch (error) {
    record(`GET ${path}`, false, `unreachable: ${(error as Error).message}`);
    return null;
  }
  const body = await response.text();
  const missing = expected.filter((needle) => !body.includes(needle));
  record(
    `GET ${path}`,
    response.status === 200 && missing.length === 0,
    `status ${response.status}${missing.length === 0 ? '' : `, missing ${missing.join(', ')}`}`,
  );
  return body;
}

// --- The site answers at all -------------------------------------------------

const landing = await checkPage('/', ['<html', 'class="landing"']);
if (landing !== null && !/class="row"|The menus are being updated/.test(landing)) {
  record('landing has menus or an empty state', false, 'neither Section rows nor the empty state');
}

await checkPage('/healthz', ['ok']);
await checkPage('/robots.txt', ['Disallow: /admin']);
await checkPage('/admin/login', ['type="password"']);
await checkPage('/assets/styles.css', ['--copper']);
await checkPage('/assets/app.js', ['data-zoom']);
await checkPage('/assets/fonts/archivo-latin.woff2', []);

const missingPage = await request('/definitely-not-here');
record('GET /definitely-not-here', missingPage.status === 404, `status ${missingPage.status}`);

// --- Each Section a customer can reach, and its images -----------------------

const sections = landing === null ? [] : [...landing.matchAll(/class="row" href="([^"]+)"/g)].map((m) => m[1]!);

if (sections.length === 0) {
  record('at least one Section has a Current Menu Set', false, 'the landing page lists none');
}

for (const href of sections) {
  const body = await checkPage(href, ['class="page"']);
  if (body === null) continue;

  const pages = [...body.matchAll(/data-page="(\d+)"/g)].map((match) => match[1]!);
  record(`${href} shows Pages`, pages.length > 0, `${pages.length} page(s)`);

  const media = body.match(/\/media\/[0-9a-f-]{36}\.[0-9a-f]+\.webp/);
  if (media === null) {
    record(`${href} links a Viewing image`, false, 'no media URL in the page');
    continue;
  }

  const image = await request(media[0]);
  const cache = image.headers.get('cache-control') ?? '';
  record(
    `GET ${media[0]}`,
    image.status === 200 &&
      (image.headers.get('content-type') ?? '').startsWith('image/webp') &&
      cache.includes('immutable'),
    `status ${image.status}, type ${image.headers.get('content-type')}, cache ${cache}`,
  );

  const jpeg = await request(media[0].replace(/\.webp$/, '.jpg'));
  record(
    `GET ${media[0].replace(/\.webp$/, '.jpg')}`,
    jpeg.status === 200 && (jpeg.headers.get('content-type') ?? '').startsWith('image/jpeg'),
    `status ${jpeg.status}, type ${jpeg.headers.get('content-type')}`,
  );

  const wrongExtension = await request(media[0].replace(/\.webp$/, '.jpeg'));
  record(
    'Originals are not reachable',
    wrongExtension.status === 404,
    `a non-variant extension gives ${wrongExtension.status}`,
  );

  const traversal = await request(`${media[0].replace('/media/', '/media/..%2Foriginals%2F')}`);
  record(
    'media paths cannot escape the set directory',
    traversal.status === 404,
    `status ${traversal.status}`,
  );
}

// --- Report -----------------------------------------------------------------

const width = Math.max(...results.map((result) => result.name.length));
for (const result of results) {
  console.log(`${result.ok ? 'ok  ' : 'FAIL'}  ${result.name.padEnd(width)}  ${result.detail}`);
}

const failures = results.filter((result) => !result.ok);
console.log(`\n${results.length - failures.length}/${results.length} checks passed against ${base}`);
if (failures.length > 0) process.exitCode = 1;