/**
 * Consent-gated analytics loader.
 * All third-party tracking (GTM, Google Ads, Ahrefs) is loaded dynamically
 * ONLY after the user accepts analytics/marketing consent.
 * No tracking script loads before the user makes a choice.
 */
(() => {
  function pushConsentUpdate(prefs, mode) {
    window.dataLayer = window.dataLayer || [];
    window.dataLayer.push([
      'consent',
      mode,
      {
        ad_storage: prefs.marketing ? 'granted' : 'denied',
        ad_user_data: prefs.marketing ? 'granted' : 'denied',
        ad_personalization: prefs.marketing ? 'granted' : 'denied',
        analytics_storage: prefs.analytics ? 'granted' : 'denied',
      },
    ]);
  }

  function loadGTM(prefs) {
    if (window._gtmLoaded) {
      pushConsentUpdate(prefs, 'update');
      return;
    }
    window._gtmLoaded = true;
    var w = window,
      d = document,
      s = 'script',
      l = 'dataLayer',
      i = 'GTM-N9LNSJJR';
    w[l] = w[l] || [];
    // Tell Google tags which storage categories were granted before the
    // container starts. This keeps an analytics-only choice from enabling
    // advertising storage inside the shared GTM container.
    pushConsentUpdate(prefs, 'default');
    w[l].push({ 'gtm.start': new Date().getTime(), event: 'gtm.js' });
    var f = d.getElementsByTagName(s)[0];
    var j = d.createElement(s);
    j.async = true;
    j.src = 'https://www.googletagmanager.com/gtm.js?id=' + i;
    f.parentNode.insertBefore(j, f);
  }
  function loadGoogleAds() {
    if (window._gadsLoaded) return;
    window._gadsLoaded = true;
    var s = document.createElement('script');
    s.async = true;
    s.src = 'https://www.googletagmanager.com/gtag/js?id=AW-18323187725';
    document.head.appendChild(s);
    window.dataLayer = window.dataLayer || [];
    function gtag() {
      window.dataLayer.push(arguments);
    }
    window.gtag = gtag;
    gtag('js', new Date());
    gtag('config', 'AW-18323187725');
  }
  function loadAhrefs() {
    if (window._ahrefsLoaded) return;
    window._ahrefsLoaded = true;
    var s = document.createElement('script');
    s.src = 'https://analytics.ahrefs.com/analytics.js';
    s.dataset.key = '9GF8lp7prynyiOk5HcbCrQ';
    s.async = true;
    document.head.appendChild(s);
  }
  function clearCookie(name) {
    document.cookie = name + '=; Max-Age=0; path=/; SameSite=Lax';
  }
  function clearDisallowedCookies(prefs) {
    var names = document.cookie
      .split(';')
      .map(function (cookie) { return cookie.trim().split('=', 1)[0]; })
      .filter(Boolean);
    names.forEach(function (name) {
      var isFunctional = name === 'kp_currency';
      var isMarketing = name === 'kp_ref' || name.indexOf('_gcl_') === 0;
      var isAnalytics = name === '_ga' || name.indexOf('_ga_') === 0;
      if ((!prefs.functional && isFunctional) || (!prefs.marketing && isMarketing) || (!prefs.analytics && isAnalytics)) {
        clearCookie(name);
      }
    });
  }
  function applyConsent(prefs) {
    clearDisallowedCookies(prefs);
    if (prefs.analytics || prefs.marketing) {
      loadGTM(prefs);
    }
    if (prefs.analytics) {
      loadAhrefs();
    }
    if (prefs.marketing) {
      loadGoogleAds();
    }
  }
  function getCookie(name) {
    var match = document.cookie.match(new RegExp('(?:^|;\\s*)' + name + '=([^;]*)'));
    return match ? decodeURIComponent(match[1]) : null;
  }
  function getSavedPrefs() {
    try {
      var raw = getCookie('kp_cookie_consent');
      return raw ? JSON.parse(raw) : null;
    } catch (_) {
      return null;
    }
  }
  var prefs = getSavedPrefs();
  if (prefs) {
    applyConsent(prefs);
  }
  window.addEventListener('kp:consent-changed', (e) => {
    applyConsent(e.detail);
  });
})();