(function () {
    const params = new URLSearchParams(document.currentScript.src.split('?')[1] || '');
    const pixel = params.get('pixel');
    const event = params.get('event') || 'ViewContent';
    const eventId = params.get('eid') || Date.now().toString(36) + Math.random().toString(36).slice(2);

    if (!pixel) return;

    !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', pixel);

    fbq('track', event, {}, {
        eventID: eventId
    });

})();