var PING_FREQUENCY_MS = 5000;
var PINGER_TIMEOUT_MS = 1800000;

var BrowserDetect = {
	init: function () {
		this.browser = this.searchString(this.dataBrowser) || "An unknown browser";
		this.version = this.searchVersion(navigator.userAgent)
			|| this.searchVersion(navigator.appVersion)
			|| "an unknown version";
		this.OS = this.searchString(this.dataOS) || "an unknown OS";
	},
	searchString: function (data) {
		for (var i=0;i<data.length;i++)	{
			var dataString = data[i].string;
			var dataProp = data[i].prop;
			this.versionSearchString = data[i].versionSearch || data[i].identity;
			if (dataString) {
				if (dataString.indexOf(data[i].subString) != -1) {
					if(data[i].notInclude) {
						if(dataString.indexOf(data[i].notInclude) == -1) {
							return data[i].identity;
						}
					} else {
						return data[i].identity;
					}
				}
			}
			else if (dataProp)
				return data[i].identity;
		}
	},
	searchVersion: function (dataString) {
		var index = dataString.indexOf(this.versionSearchString);
		if (index == -1) return;
		return parseFloat(dataString.substring(index+this.versionSearchString.length+1));
	},
	dataBrowser: [
		{ 	string: navigator.userAgent,
			subString: "OmniWeb",
			versionSearch: "OmniWeb",
			identity: "OmniWeb"
		},
		{
			string: navigator.vendor,
			subString: "Apple",
			identity: "Safari"
		},
		{
			prop: window.opera,
			identity: "Opera"
		},
		{
			string: navigator.vendor,
			subString: "iCab",
			identity: "iCab"
		},
		{
			string: navigator.vendor,
			subString: "KDE",
			identity: "Konqueror"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "IE",
			versionSearch: "MSIE"
		},
		{	/* for newer Netscapes (6+)*/
			string: navigator.userAgent,
			subString: "Navigator",
			identity: "Netscape",
			versionSearch: "Navigator"
		},
		{ 	/* for older Netscapes (4-) */
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			notInclude: "Firefox",
			versionSearch: "Mozilla"
		},
		{
			string: navigator.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			notInclude: "Firefox",
			versionSearch: "rv"
		},

	],
	dataOS : [
		{
			string: navigator.platform,
			subString: "Win",
			identity: "Windows"
		},
		{
			string: navigator.platform,
			subString: "Mac",
			identity: "Mac"
		},
		{
			string: navigator.platform,
			subString: "Linux",
			identity: "Linux"
		}
	]

};

BrowserDetect.init();

var url = 'http://labs.natpal.com/trk/pixel?trackid=' +
	         '&trkDomain=purelight.com' +
	         '&referrer='        + escape(document.referrer) + 
	         '&pageVisited='     + escape(location.href) +
	         '&browser='   	     + escape(BrowserDetect.browser) +
	         '&browserVersion='  + escape(BrowserDetect.version) +
	         '&OS='    			 + escape(BrowserDetect.OS) +
	         '&maxHeight='       + escape(window.screen.availHeight) + 
	         '&maxWidth='        + escape(window.screen.availWidth);

if(typeof(gPrimaryAttr)   != "undefined" && gPrimaryAttr != null)  url += '&primaryAttrib='   + escape(gPrimaryAttr);
if(typeof(gSecondaryAttr) !=  "undefined" && gSecondaryAttr != null) url += '&secondaryAttrib=' + escape(gSecondaryAttr);

document.writeln('<img id="magicTrackingPixel" width="1" height="1" border="0" src="' + url + '"/>');

var Pinger = {
	currentTimePassedMs : 0,
	ping : function(url, ms)
	{
		var rnd = Math.floor(Math.random() * 1000000);
		Pinger.makePingRequest(url + '&rnd=' + rnd);
		if (this.currentTimePassedMs <= PINGER_TIMEOUT_MS)
		{
			this.currentTimePassedMs += ms;
			setTimeout(function() {Pinger.ping(url, ms)}, ms);
		}
	},
	makePingRequest : function(url)
	{
		var pixelId = "magicPingingPixel";
		var pingImage = document.getElementById(pixelId);
		if (!pingImage)
			document.writeln('<img id="' + pixelId + '" width="1" height="1" border="0" src="#"/>');
		pingImage = document.getElementById(pixelId);
		pingImage.src = url;
	}
};

var Pinger2 = {
        ping : function(url)
        {
                Pinger2.doPing(url, new Date().getTime());
        },
        doPing : function(url, timeStartedMs)
        {
                Pinger2.makePingRequest(url + '&rnd=' + Math.floor(Math.random() * 1000000));
                var timePassed = new Date().getTime() - timeStartedMs;
                if (timePassed <= PINGER_TIMEOUT_MS)
                {
                        var waitMs;

                        if (timePassed < 3000)
                                waitMs = 3000;
                        else if (timePassed >= 3000 && timePassed < 11000)
                                 waitMs = 5000;
                        else if (timePassed >= 11000 && timePassed < 30000)
                                waitMs = 10000;
                        else
                                waitMs = 30000;

                        setTimeout(function() {Pinger2.doPing(url, timeStartedMs)}, waitMs);
                }
        },
        makePingRequest : function(url)
        {
                var pixelId = "magicPingingPixel";
                var pingImage = document.getElementById(pixelId);
                if (!pingImage)
                        document.writeln('<img id="' + pixelId + '" width="1" height="1" border="0" src="#"/>');
                pingImage = document.getElementById(pixelId);
                pingImage.src = url;
        }
};

var pingParams = '&ping=true';
Pinger2.ping(url + pingParams);