(function (d,w) { // eslint-disable-line max-statements
    function htmlToElement(html) { // eslint-disable-line no-unused-vars, max-statements
        if (html.indexOf('<script') === 0) {
            var src = html.substring(html.indexOf(' ') + 1, html.indexOf('>') - 1);
            src = src.slice(src.indexOf('src=') + 5);
            if (src.indexOf(' ') !== -1) {
                src = src.substring(0, src.indexOf(' ') - 1);
            }
            var script = document.createElement('script');
            script.type = 'text/javascript';
            script.src = src;
            return script;            
        }
        var div = d.createElement('div');
        div.innerHTML = html;
        var r = div.content ? div.content.firstChild : div.firstChild;
        return r;
    }  

    // INSERT PAGELOAD PIXELS HERE
    // ex: d.body.appendChild(htmlToElement('<img src="https://secure.adnxs.com/seg?add=10486409&t=2" width="1" height="1" />'));

    // END PAGELOAD PIXELS HERE
  
    w.aupixels = {
        linkfire: {
            // INSERT LINKFIRE PIXELS HERE
            /* ex:
                'itunes': [
                    'https://secure.adnxs.com/px?id=911725&t=2&adgt=true',
                    'https://ad.doubleclick.net/ddm/activity/src=8005553;type=invmedia;cat=hs0rirok;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=1?'
                ],
                'google-play': [
                    'https://secure.adnxs.com/px?id=911726&t=2&adgt=true',
                    'https://ad.doubleclick.net/ddm/activity/src=8005553;type=invmedia;cat=bphkhwr5;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=1?'
                ],
            */

            // END LINKFIRE PIXELS HERE
        },
        ec: {
            // INSERT ECOMMERCE PIXELS HERE
            /* ex:
                'view': [
                    'https://secure.adnxs.com/px?id=911725&t=2&adgt=true',
                    'https://ad.doubleclick.net/ddm/activity/src=8005553;type=invmedia;cat=hs0rirok;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=1?'
                ],
                'add': [
                    'https://secure.adnxs.com/px?id=911725&t=2&adgt=true',
                    'https://ad.doubleclick.net/ddm/activity/src=8005553;type=invmedia;cat=hs0rirok;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=1?'
                ],
                'checkout': [
                    'https://secure.adnxs.com/px?id=911725&t=2&adgt=true',
                    'https://ad.doubleclick.net/ddm/activity/src=8005553;type=invmedia;cat=hs0rirok;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=1?'
                ],
                'transaction': [
                    'https://secure.adnxs.com/px?id=911725&t=2&adgt=true',
                    'https://ad.doubleclick.net/ddm/activity/src=8005553;type=invmedia;cat=hs0rirok;dc_lat=;dc_rdid=;tag_for_child_directed_treatment=;ord=1?'
                ]
            */
        }
    };
  
    var buttonClickPixels = [
        // for adding custom button click pixels unique to one or very few sites/campaigns. if more common implementation, use profiler service
        // example:
        // {
        //     selector: 'SOME querySelectorAll-STYLE SELECTOR', 
        //     pixels: ['<pixel-1-htmls/>', '<pixel-2-html/>'],
        // },
    ];

    function createEvent() {
        if (typeof window.CustomEvent === 'function') {
            return new CustomEvent('aupixels'); // eslint-disable-line
        }
        var p = {
            bubbles: false,
            cancelable: false,
            detail: undefined // eslint-disable-line
        };
        var evt = document.createEvent('CustomEvent'); // eslint-disable-line
        evt.initCustomEvent('aupixels', p.bubbles, p.cancelable, p.detail);
        return evt
    }

    function buttonClickHandlers(selectors) {
        selectors.forEach(function(e) { // eslint-disable-line
            var selector = e.selector; // eslint-disable-line
            var pix = e.pixels;
            var els = d.querySelectorAll(selector);
            for (var i = 0; i < els.length; i++) { // eslint-disable-line
                var button = els[i];
                pix.forEach(function(p) { // eslint-disable-line
                    button.addEventListener('mousedown', function() { // eslint-disable-line
                        d.body.appendChild(htmlToElement(p));
                    });              
                    button.addEventListener('touchstart', function() { // eslint-disable-line
                        d.body.appendChild(htmlToElement(p));
                    });
                })          
            }
        });
    }

    buttonClickHandlers(buttonClickPixels);

    var event = createEvent();
    w.dispatchEvent(event);
})(document, window);