(function() {
	var domain = '//stats.jove.com/';
	if (!Date.now) {
		Date.now = function() { 
			return new Date().getTime(); 
		}
	}
	$(document).ready(function() {
		try {
			trackView();
		} catch(err) {};
	});
	$(window).on('beforeunload', function(){
		if (getStatsCookie('JoVEUser2')) {
			var JoVEUser = getStatsCookie('JoVEUser2');
			pageData = $('#jove_stats').html().split("::");
			recordId = pageData[0];
			timestart = pageData[1];
			timeend = Math.floor((Date.now() / 1000));
			timeonpage = timeend - timestart;
			var dataText = {'joveuser':JoVEUser,'recordId':recordId,'timeonpage':timeonpage};
			if(navigator.sendBeacon){
				var jsondata = new FormData();
				jsondata.append('joveuser',JoVEUser);
				jsondata.append('recordId',recordId);
				jsondata.append('timeonpage',timeonpage);
				navigator.sendBeacon(domain + 'update_stats.php',jsondata);
			}else{
				$.ajax({url: domain+ 'update_stats.php',
					type: 'POST',
					data: dataText,
					async: false
				});
			}
		}
	});
	function update_time_on_page(recordId, timestart){
		if (getStatsCookie('JoVEUser2')) {
			var JoVEUser = getStatsCookie('JoVEUser2');
			timeend = Math.floor((Date.now() / 1000));
			timeonpage = (timeend - timestart) <= 1 ? 1 : timeend - timestart;
			var dataText = {'joveuser':JoVEUser,'recordId':recordId,'timeonpage':timeonpage};
			$.ajax({url: domain+ 'update_stats.php',
				type: 'POST',
				data: dataText,
				async: false
			}).always(function(){
				setTimeout(function(){update_time_on_page(recordId, timestart);}, 15000);
			});
		}
	}
	function trackView() {
		if (getStatsCookie('JoVEUser2')) {
			var JoVEUser = getStatsCookie('JoVEUser2');
		} else {
						//var JoVEUser = ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c => (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16));
			var JoVEUser = ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, function(c) { return (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16) });
			setStatsCookie('JoVEUser2',JoVEUser,360)
		}
		var access = 0;
		if (document.getElementById('access_level')) {
			var access = document.getElementById('access_level').value;
		}
		var user_id = 0;
		if (document.getElementById('user_id')) {
			var user_id = document.getElementById('user_id').value;
		}
		var country = 'Unknown';
		if (document.getElementById('stats_country')) {
			var country = document.getElementById('stats_country').value;
		}
		var dataText = 'page='+escape(window.location.href.replace(/https?:\/\//,''))+'&referrer='+escape(document.referrer.replace(/https?:\/\//,''))+'&joveuser='+JoVEUser+'&browser='+escape(navigator.userAgent)+'&access='+access+'&user_id='+user_id+'&country='+country;
		$.get(domain + 'process.php?'+dataText,function(data){
			curtime = Math.floor((Date.now() / 1000));
			$('#jove_stats').html(data+ '::' + curtime).css('display','none');
			update_time_on_page(data, curtime);
		});
	}
	function setStatsCookie(c_name,value,exdays) {
		var exdate=new Date();
		exdate.setDate(exdate.getDate() + exdays);
		var c_value=escape(value) + ((exdays==null) ? "" : "; expires="+exdate.toUTCString());
		document.cookie=c_name + "=" + c_value + ";domain=" + window.location.hostname + ";secure";
	}
	function getStatsCookie(c_name) {
		var i,x,y,ARRcookies=document.cookie.split(";");
		for (i=0;i<ARRcookies.length;i++) {
			x=ARRcookies[i].substr(0,ARRcookies[i].indexOf("="));
			y=ARRcookies[i].substr(ARRcookies[i].indexOf("=")+1);
			x=x.replace(/^\s+|\s+$/g,"");
			if (x==c_name) {
				return unescape(y);
			}
		}
	}
})();