// Builds the static site into ./dist. No dependencies: `node build.mjs`.
import { mkdir, rm, writeFile, cp, readFile } from 'node:fs/promises';
import { createHash } from 'node:crypto';
import { join, dirname } from 'node:path';
import { fileURLToPath } from 'node:url';
import { page, eyebrow, btn, SITE } from './src/layout.mjs';
import { LOCALES, DEFAULT_LOCALE, localize, translatePage } from './src/i18n.mjs';

const root = dirname(fileURLToPath(import.meta.url));
const out = join(root, 'dist');
const pages = ['home', 'about', 'portfolio', 'consulting', 'marketing', 'business-setup', 'business-optimization', 'supply-chain', 'cybersecurity', 'education', 'fractional', 'contact', 'book', 'press'];

await rm(out, { recursive: true, force: true });
await mkdir(out, { recursive: true });
await cp(join(root, 'static'), out, { recursive: true });

// Fingerprint CSS/JS so a new deploy never reuses a stale cached copy.
const hashOf = async (f) => createHash('sha256').update(await readFile(join(root, 'static', f))).digest('hex').slice(0, 10);
const assetVersions = Object.fromEntries(await Promise.all(['styles.css', 'site.js', 'home.css', 'home.js', 'fonts.css', 'book.js', 'rtl.css'].map(async (f) => ['/assets/' + f, await hashOf('assets/' + f)])));
const fingerprint = (html) => Object.entries(assetVersions).reduce((h, [u, v]) => h.replaceAll(`"${u}"`, `"${u}?v=${v}"`), html);

// Spanish and Arabic pages are the English pages with their text swapped through src/i18n/<locale>.json.
const dicts = Object.fromEntries(await Promise.all(LOCALES.filter((l) => l !== DEFAULT_LOCALE).map(async (l) => [l, JSON.parse(await readFile(join(root, 'src/i18n', l + '.json'), 'utf8'))])));
const missing = {};

const urls = [];
for (const name of pages) {
  const def = (await import(`./src/pages/${name}.mjs`)).default;
  for (const locale of LOCALES) {
    let html = page(def, locale);
    if (locale !== DEFAULT_LOCALE) {
      const t = translatePage(html, locale, dicts[locale]);
      html = t.html;
      for (const s of t.missing) (missing[locale] ??= new Set()).add(s);
    }
    const file = join(out, localize(def.path, locale), 'index.html');
    await mkdir(dirname(file), { recursive: true });
    await writeFile(file, fingerprint(html));
  }
  if (!def.noindex) urls.push(def.path);
  console.log('built', def.path);
}
for (const [l, set] of Object.entries(missing)) {
  console.warn(`\n${l}: ${set.size} strings without translation (shown in English):`);
  for (const s of set) console.warn('  ' + JSON.stringify(s));
}
if (process.argv.includes('--strict') && Object.keys(missing).length) process.exit(1);

await writeFile(join(out, '404.html'), fingerprint(page({
  path: '/404/',
  title: 'Page Not Found | Dylan Mazzei',
  description: 'This page could not be found.',
  body: `<section class="page-hero"><div class="wrap-narrow stack center" style="align-items:center;text-align:center">${eyebrow('404')}<h1 class="h-display-lg">Page Not Found</h1><div class="btn-row">${btn('BACK TO HOME', '/')}</div></div></section>`,
})));

const today = new Date().toISOString().slice(0, 10);
await writeFile(join(out, 'sitemap.xml'), `<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xhtml="http://www.w3.org/1999/xhtml">
${urls.flatMap((u) => LOCALES.map((l) => `  <url><loc>${SITE.url}${localize(u, l)}</loc><lastmod>${today}</lastmod>${LOCALES.map((a) => `<xhtml:link rel="alternate" hreflang="${a}" href="${SITE.url}${localize(u, a)}"/>`).join('')}</url>`)).join('\n')}
</urlset>
`);
await writeFile(join(out, 'robots.txt'), 'User-agent: *\nAllow: /\nSitemap: https://dylanmazzei.com/sitemap.xml\n');
console.log('done →', out);