import assert from 'node:assert/strict';
import { access, readFile } from 'node:fs/promises';
import path from 'node:path';
import test from 'node:test';

const exportRoot = path.resolve('out');

test('the production build exports a usable home page', async () => {
  const indexPath = path.join(exportRoot, 'index.html');
  const html = await readFile(indexPath, 'utf8');

  assert.match(html, /<!DOCTYPE html>/i);
  assert.match(html, /<html[^>]*lang=/i);

  const assetPaths = [
    ...html.matchAll(/(?:src|href)="(\/_next\/static\/[^"?#]+)/g),
  ].map((match) => match[1]);

  assert.ok(assetPaths.length > 0, 'expected the home page to reference built assets');

  await Promise.all(
    [...new Set(assetPaths)].map((assetPath) =>
      access(path.join(exportRoot, assetPath.replace(/^\//, ''))),
    ),
  );
});