// SiteSensors main class
function SS() {
  this.tpc = '767a96cb78e65e2dfb359536134bd246';
	this.fpc_name = 'SS_FPC';
	this.sid_name = 'SS_SID';
	this.fpc = this.readCookie(this.fpc_name);
	this.sid = this.readCookie(this.sid_name);
	if (this.sid == null) {
	  var ts = new Date();
	  this.sid = ts.getTime();
	}
}

SS.prototype.cookieDomain = function() {
  var parts = document.domain.split(".");
  var domain = "";

  if (parts.length >= 2) {
    var last = parts.length-1;
    domain = "." + parts[last-1] + "." + parts[last];
	}

  return domain;
}

SS.prototype.createCookie = function(name, value, milliseconds) {
	if (milliseconds) {
		var date = new Date();
		date.setTime(date.getTime()+(milliseconds));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/; domain="+this.cookieDomain();
}

SS.prototype.readCookie = function(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}


SS.prototype.Run = function(collector) {
  ts = new Date();
	
	if (!this.tpc && this.fpc) {
	  this.tpc = this.fpc;
	}
	
  if (!this.fpc && this.tpc) {
	  this.fpc = this.tpc;
	}
	
	if (!this.tpc && !this.fpc) {
	  this.fpc = ts.getTime();
		this.tpc = this.fpc;
	}
	
	if (this.tpc != this.fpc) {
	  this.tpc = this.fpc;
	}
		
  url  = 'http://collector.sitesensor.ch/ssc.php?';
	url +=  '_ssCl='+escape(collector);
	url += '&_ssTs='+ts.getTime();
	url += '&_ssSid='+this.sid;
	url += '&_ssFp='+this.fpc;
	url += '&_ssTp='+this.tpc;
	url += '&_ssUrl='+escape(document.location.href);
	url += '&_ssRef='+escape(document.referrer);
	document.ssimg.src = url;
	this.createCookie(this.fpc_name, this.fpc, 315360000000);
	this.createCookie(this.sid_name, this.sid, 1800000);
}

SS.prototype.PrintDebug = function() {
  document.write("<br><br>");
	document.write("<u><b>SiteSensor debug information</b></u><br>");
	ssimgurl = document.ssimg.src;
	document.write("URL: <a target=\"_blank\" href=\""+ssimgurl+"\">"+ssimgurl+"</a><br>");
	document.write("URL length:"+ssimgurl.length+"<br><br>");
	document.write("Query params: <br>");
	document.write(decodeURI(ssimgurl.substring(ssimgurl.indexOf("?")+1).replace(new RegExp("\&", "g"), "<br>"))+"<br>");
	document.write("document.cookie: "+document.cookie+"<br>");
}

SiteSensor = new SS();