(function(){
  var pixelId = "26192820266997558";
  window.IPU_META_PIXEL_READY = true;

  !function(f,b,e,v,n,t,s){
    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];
    s.parentNode.insertBefore(t,s);
  }(window,document,'script','https://connect.facebook.net/en_US/fbevents.js');

  fbq('init', pixelId);

  function uuid(){
    if(window.crypto && crypto.randomUUID) return crypto.randomUUID();
    return 'ipu-' + Date.now() + '-' + Math.random().toString(16).slice(2);
  }

  function capi(eventName, data){
    var eventId = data && data.event_id ? data.event_id : uuid();
    var payload = Object.assign({
      event_name: eventName,
      event_id: eventId,
      event_source_url: location.href,
      currency: 'INR',
      content_name: 'IPU Membership',
      content_category: 'Membership'
    }, data || {});

    try {
      fetch('/capi/event', {
        method: 'POST',
        credentials: 'include',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(payload)
      }).catch(function(){});
    } catch(e) {}

    return eventId;
  }

  var pageViewId = capi('PageView', {});
  fbq('track', 'PageView', {}, { eventID: pageViewId });

  if(location.pathname.indexOf('/membership') === 0) {
    var leadId = capi('Lead', { content_name: 'IPU Membership Landing' });
    fbq('track', 'Lead', { content_name: 'IPU Membership Landing' }, { eventID: leadId });
  }

  document.addEventListener('submit', function(e){
    var form = e.target;
    if(!form || !form.action || form.action.indexOf('/pay/start') === -1) return;

    var fd = new FormData(form);
    var type = fd.get('membership_type') || 'physical';
    var value = String(type).toLowerCase() === 'digital' ? 999 : 1799;

    var checkoutId = capi('InitiateCheckout', {
      value: value,
      email: fd.get('email') || '',
      phone: fd.get('mobile') || '',
      content_name: 'IPU ' + type + ' Membership'
    });

    fbq('track', 'InitiateCheckout', {
      value: value,
      currency: 'INR',
      content_name: 'IPU ' + type + ' Membership',
      content_category: 'Membership'
    }, { eventID: checkoutId });
  }, true);

  try {
    var m = document.cookie.match(/(?:^|; )ipu_purchase=([^;]+)/);
    if(m) {
      var v = decodeURIComponent(m[1]).split(':');
      var orderId = v[0];
      var amount = parseFloat(v[1] || '0') || 0;
      var purchaseId = 'purch_' + orderId;

      fbq('track', 'Purchase', {
        value: amount,
        currency: 'INR'
      }, { eventID: purchaseId });

      document.cookie = 'ipu_purchase=; Max-Age=0; path=/';
    }
  } catch(e) {}
})();