import assert from 'node:assert/strict';
import { existsSync, readFileSync } from 'node:fs';
import { fileURLToPath } from 'node:url';

const dist = fileURLToPath(new URL('../dist/', import.meta.url));
const html = readFileSync(
  new URL('../dist/index.html', import.meta.url),
  'utf8'
);
const assets = [...html.matchAll(/(?:href|src)="(\/assets\/[^"]+)"/g)].map(
  match => match[1]
);
const manifest = JSON.parse(
  readFileSync(new URL('../dist/manifest.json', import.meta.url), 'utf8')
);

assert.match(html, /<div id="app"><\/div>/);
assert.match(html, /<link\s+rel="manifest"\s+href="\/manifest\.json"\s*\/?>/);
assert.match(
  html,
  /<script\b[^>]*\bsrc="\/runtime-config\.js"[^>]*><\/script>/
);
assert.ok(
  readFileSync(new URL('../dist/favicon.ico', import.meta.url)).equals(
    readFileSync(new URL('../public/favicon-32x32.png', import.meta.url))
  ),
  'favicon.ico must reuse the GoChat favicon'
);
assert.ok(
  html.indexOf('/runtime-config.js') < html.indexOf('type="module"'),
  'runtime config must load before the app module'
);
assert.ok(
  assets.some(asset => asset.endsWith('.js')),
  'missing JS asset'
);
assert.ok(
  assets.some(asset => asset.endsWith('.css')),
  'missing CSS asset'
);
assert.ok(!/<script(?![^>]*\bsrc=)[^>]*>/i.test(html), 'inline script found');
assets.forEach(asset => assert.ok(existsSync(dist + asset.slice(1)), asset));

for (const size of [192, 512]) {
  const dimensions = `${size}x${size}`;
  const icon = manifest.icons.find(item => item.sizes === dimensions);
  assert.equal(icon?.type, 'image/png', `missing ${dimensions} PNG icon`);

  const png = readFileSync(dist + icon.src.slice(1));
  assert.deepEqual(
    [...png.subarray(0, 8)],
    [137, 80, 78, 71, 13, 10, 26, 10]
  );
  assert.equal(png.readUInt32BE(16), size, `${icon.src} width`);
  assert.equal(png.readUInt32BE(20), size, `${icon.src} height`);
}

const dashboard = assets
  .filter(asset => asset.endsWith('.js'))
  .map(asset => readFileSync(dist + asset.slice(1), 'utf8'))
  .join('\n');
assert.doesNotMatch(
  dashboard,
  /=\(?function\(\)\{return this\}\)?\(\);try\{([A-Za-z_$][\w$]*)=\1\|\|new Function\("return this"\)\(\)/,
  'dashboard contains a CSP-blocked UMD global shim'
);