export const GA_TRACKING_ID = import.meta.env.VITE_GA_TRACKING_ID;
export const META_PIXEL_ID = import.meta.env.VITE_META_PIXEL_ID;

// Declare global window properties for TS
declare global {
  interface Window {
    dataLayer: any[];
    gtag: (...args: any[]) => void;
    fbq: (...args: any[]) => void;
    _fbq: any;
  }
}

export const initTracking = () => {
  const isConsented = localStorage.getItem('cookie-consent') === 'accepted';
  if (!isConsented) return;

  // Initialize GA
  if (GA_TRACKING_ID && typeof window !== 'undefined') {
    const defaultDataLayer = window.dataLayer || [];
    window.dataLayer = defaultDataLayer;
    if (!document.getElementById('ga-script')) {
      const script = document.createElement('script');
      script.id = 'ga-script';
      script.src = `https://www.googletagmanager.com/gtag/js?id=${GA_TRACKING_ID}`;
      script.async = true;
      document.head.appendChild(script);

      window.gtag = function gtag() {
        window.dataLayer.push(arguments);
      };
      window.gtag('js', new Date());
      window.gtag('config', GA_TRACKING_ID);
    }
  }

  // Initialize Meta Pixel
  if (META_PIXEL_ID && typeof window !== 'undefined') {
    !function(f:any,b:any,e:any,v:any,n:any,t:any,s:any)
    {if(f.fbq)return;n=f.fbq=function(){n.callMethod?
    n.callMethod.apply(n,arguments):n.queue.push(arguments)};
    if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';
    n.queue=[];t=b.createElement(e);t.async=!0;
    t.src=v;s=b.getElementsByTagName(e)[0];
    if(s.parentNode) s.parentNode.insertBefore(t,s)}(window, document,'script',
    'https://connect.facebook.net/en_US/fbevents.js');
    window.fbq('init', META_PIXEL_ID);
    window.fbq('track', 'PageView');
  }
};

export const trackPageView = (url: string) => {
  const isConsented = localStorage.getItem('cookie-consent') === 'accepted';
  if (!isConsented) return;

  if (GA_TRACKING_ID && window.gtag) {
    window.gtag('config', GA_TRACKING_ID, {
      page_path: url,
    });
  }

  if (META_PIXEL_ID && window.fbq) {
    window.fbq('track', 'PageView');
  }
};

export const trackConversion = (event_name: string) => {
  const isConsented = localStorage.getItem('cookie-consent') === 'accepted';
  if (!isConsented) return;

  if (GA_TRACKING_ID && window.gtag) {
    window.gtag('event', 'conversion', {
      send_to: `${GA_TRACKING_ID}/${event_name}`
    });
  }

  if (META_PIXEL_ID && window.fbq) {
    window.fbq('trackCustom', event_name);
  }
};