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generated by cgit v1.2.3 (git 2.51.0) at 2026-10-28 10:08:51 +0000
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// Build a single, self-contained dist/index.html (plus PWA sidecar files).
//
// Everything — app code, the @scure/@noble crypto libs, the QR generator, and
// all CSS — is bundled and inlined so the result is one file you can save and
// open offline straight from the filesystem (file://). No server, no network.
//
// For the hosted site we also emit a web manifest, icons, and a small service
// worker so the page can be installed as a PWA and still work offline once
// installed. index.html stays self-contained; these are optional extras that
// simply 404 (harmlessly) when the file is opened on its own from file://.

import { mkdir } from 'node:fs/promises';

const FAVICON =
  'data:image/svg+xml,' +
  encodeURIComponent(
    `<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32"><rect width="32" height="32" rx="7" fill="#f7931a"/><text x="16" y="23" font-size="20" font-family="Arial" font-weight="bold" text-anchor="middle" fill="#fff">₿</text></svg>`
  );

// Static assets copied verbatim into dist/ (icons referenced by the manifest).
const STATIC = ['icon-192.png', 'icon-512.png', 'icon-maskable-512.png', 'icon.svg'];

const MANIFEST = {
  id: '/',
  name: 'Bitcoin Wallet',
  short_name: 'Bitcoin',
  description: 'Self-custody Bitcoin wallet that runs entirely in your browser.',
  start_url: './',
  scope: './',
  display: 'standalone',
  background_color: '#eef0f3',
  theme_color: '#f7931a',
  icons: [
    { src: 'icon-192.png', sizes: '192x192', type: 'image/png', purpose: 'any' },
    { src: 'icon-512.png', sizes: '512x512', type: 'image/png', purpose: 'any' },
    { src: 'icon-maskable-512.png', sizes: '512x512', type: 'image/png', purpose: 'maskable' },
  ],
};

// Service worker: precache the app shell, network-first for the page (so a new
// deploy shows up), cache-first for the icons/manifest, and never touch the
// cross-origin explorer/Nostr requests. CACHE carries a build token so each
// deploy supersedes the previous cache. {{VERSION}} is filled in at build time.
const SW = `const CACHE = 'cold-{{VERSION}}';
const SHELL = ['./', 'manifest.webmanifest', 'icon-192.png', 'icon-512.png'];

self.addEventListener('install', (e) => {
  self.skipWaiting();
  e.waitUntil(caches.open(CACHE).then((c) => c.addAll(SHELL)));
});

self.addEventListener('activate', (e) => {
  e.waitUntil(
    caches
      .keys()
      .then((keys) => Promise.all(keys.filter((k) => k !== CACHE).map((k) => caches.delete(k))))
      .then(() => self.clients.claim())
  );
});

self.addEventListener('fetch', (e) => {
  const req = e.request;
  if (req.method !== 'GET') return;
  if (new URL(req.url).origin !== self.location.origin) return; // explorer/ws → network

  if (req.mode === 'navigate') {
    e.respondWith(
      fetch(req)
        .then((res) => {
          const copy = res.clone();
          caches.open(CACHE).then((c) => c.put('./', copy));
          return res;
        })
        .catch(() => caches.match('./'))
    );
    return;
  }
  e.respondWith(caches.match(req).then((hit) => hit || fetch(req)));
});
`;

const PWA_HEAD = `<link rel="manifest" href="manifest.webmanifest">
<meta name="theme-color" content="#f7931a">
<meta name="mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="default">
<meta name="apple-mobile-web-app-title" content="Bitcoin Wallet">
<link rel="apple-touch-icon" href="icon-192.png">
`;

const SW_REGISTER =
  `<script>if('serviceWorker'in navigator)addEventListener('load',function(){navigator.serviceWorker.register('sw.js').catch(function(){})});</script>`;

export async function buildHtml({ minify = true, pwa = minify } = {}) {
  const result = await Bun.build({
    entrypoints: ['./src/app.js'],
    target: 'browser',
    minify,
  });
  if (!result.success) {
    for (const log of result.logs) console.error(log);
    throw new Error('bundle failed');
  }
  let js = await result.outputs[0].text();
  // Guard against a literal </script> inside the bundle closing our tag early.
  js = js.replaceAll('</script', '<\\/script');
  const css = await Bun.file('./src/style.css').text();

  return `<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
<meta name="color-scheme" content="light">
<title>Bitcoin Wallet</title>
<link rel="icon" href="${FAVICON}">
${pwa ? PWA_HEAD : ''}<style>${css}</style>
</head>
<body>
<div id="app"></div>
<script>${js}</script>
${pwa ? SW_REGISTER + '\n' : ''}</body>
</html>`;
}

if (import.meta.main) {
  await mkdir('dist', { recursive: true });
  const html = await buildHtml({ minify: true });
  await Bun.write('dist/index.html', html);

  // PWA sidecars.
  await Bun.write('dist/manifest.webmanifest', JSON.stringify(MANIFEST, null, 2));
  const version = Bun.hash(html).toString(36);
  await Bun.write('dist/sw.js', SW.replace('{{VERSION}}', version));
  for (const f of STATIC) await Bun.write('dist/' + f, Bun.file('static/' + f));

  const kb = (Buffer.byteLength(html) / 1024).toFixed(0);
  console.log(`✓ dist/index.html written (${kb} KB) — open it offline, no server needed`);
  console.log(`✓ PWA: manifest.webmanifest, sw.js (cold-${version}), ${STATIC.length} icons`);
}