// site/analytics.jsx — thin wrapper around gtag() for CTA tracking.
// Usage: trackEvent('cta_hero_primary', { section: 'hero', lang: 'it' })
// Events are sent only if the GA snippet loaded; if consent is "denied",
// Consent Mode v2 buffers them server-side without storing _ga cookies.

function trackEvent(eventName, params) {
  try {
    if (typeof window.gtag === 'function') {
      // Auto-attach current language so GA4 can segment IT vs EN without
      // requiring every call site to pass it explicitly.
      const lang = (document.documentElement.lang || 'it').toLowerCase().slice(0, 2);
      const base = { lang: lang };
      // Auto-attach active experiment variants (none on EN; sticky on IT).
      if (window.__experiment_hero_v1) {
        base.experiment_hero_v1 = window.__experiment_hero_v1;
      }
      window.gtag('event', eventName, Object.assign(base, params || {}));
    }
  } catch (e) { /* swallow — analytics must never break the page */ }
}

// Called by the consent banner when the user accepts "all".
function grantAnalyticsConsent() {
  try {
    if (typeof window.gtag === 'function') {
      window.gtag('consent', 'update', {
        'analytics_storage': 'granted'
      });
    }
  } catch (e) {}
}

Object.assign(window, { trackEvent, grantAnalyticsConsent });