const fs = require('fs');

function read(file) { return fs.readFileSync(file, 'utf8'); }
function write(file, s) { fs.writeFileSync(file, s, 'utf8'); }

// Include trend image in optimization pipeline.
{
  const file = 'scripts/optimize-growth-images.sh';
  let s = read(file);
  const line = 'optimize dateweb-dating-trends-2026-hero.png dateweb-dating-trends-2026-hero-optimized.webp';
  if (!s.includes(line)) {
    const anchor = 'optimize dateweb-dating-nach-trennung-hero.png dateweb-dating-nach-trennung-hero-optimized.webp\n';
    if (!s.includes(anchor)) throw new Error('optimize anchor missing');
    s = s.replace(anchor, `${anchor}${line}\n`);
  }
  write(file, s);
}

// Add social dimensions to trend generator.
{
  const file = 'scripts/generate-static-dating-trends-2026.mjs';
  let s = read(file);
  if (!s.includes('og:image:width')) {
    const anchor = '  <meta property="og:image" content="${site}${image}">\n';
    if (!s.includes(anchor)) throw new Error('trend generator og image anchor missing');
    s = s.replace(anchor, `${anchor}  <meta property="og:image:width" content="1200">\n  <meta property="og:image:height" content="630">\n`);
  }
  write(file, s);
}

// Put trend page into explicit HTML sitemap content too.
{
  const file = 'scripts/generate-static-sitemap.mjs';
  let s = read(file);
  if (!s.includes("['Dating-Trends 2026'")) {
    const anchor = "      ['Dating ab 30', '/ratgeber/dating-ab-30', 'Klarer, ruhiger und ehrlicher starten.'],\n";
    if (!s.includes(anchor)) throw new Error('sitemap guide anchor missing');
    s = s.replace(anchor, `${anchor}      ['Dating-Trends 2026', '/ratgeber/dating-trends-2026', 'Clear Coding, KI mit Grenzen, Dating-Fatigue und sichere erste Treffen.'],\n`);
  }
  write(file, s);
}

// Harden visitor audit for trend image, social metadata, route marker and distribution marker.
{
  const file = 'scripts/visitor-audit.sh';
  let s = read(file);
  const imageAnchor = 'for image in dateweb-hero-editorial-optimized.webp dateweb-journey-premium-optimized.webp dateweb-trust-premium-optimized.webp dateweb-profile-editorial-optimized.webp; do';
  const imageNext = 'for image in dateweb-hero-editorial-optimized.webp dateweb-journey-premium-optimized.webp dateweb-trust-premium-optimized.webp dateweb-profile-editorial-optimized.webp dateweb-dating-trends-2026-hero-optimized.webp; do';
  if (s.includes(imageAnchor)) s = s.replace(imageAnchor, imageNext);

  const routePage = '"$PUBLIC_HTML/ratgeber/dating-trends-2026/index.html"';
  if (!s.includes(routePage)) {
    const anchor = '"$PUBLIC_HTML/ratgeber/profilfotos-dating/index.html"';
    if (!s.includes(anchor)) throw new Error('route social list anchor missing');
    s = s.replace(anchor, `${anchor} ${routePage}`);
  }

  if (!s.includes('Dating-Trends 2026 Ratgeber Marker')) {
    s += `\n# dateweb growth audit: Dating-Trends 2026 route and distribution\nif curl -fsS "https://dateweb.de/ratgeber/dating-trends-2026/" | grep -q "dating_trends_2026_guide"; then\n  echo "✅ Dating-Trends 2026 Ratgeber Marker"\nelse\n  echo "❌ Dating-Trends 2026 Ratgeber Marker fehlt"\n  exit 1\nfi\nfor marker in dating_trends_2026_internal_distribution dating_trends_tool_bridge dating_trends_register_bridge; do\n  if grep -Rqs "$marker" /home/dateweb.de/public_html/index.html /home/dateweb.de/public_html/ratgeber/index.html /home/dateweb.de/public_html/tools/index.html /home/dateweb.de/public_html/feed/index.html /home/dateweb.de/public_html/ratgeber/dating-trends-2026/index.html; then\n    echo "✅ $marker"\n  else\n    echo "❌ $marker fehlt"\n    exit 1\n  fi\ndone\n`;
  }
  write(file, s);
}