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)
					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.userAgent,
			subString: "Firefox",
			identity: "Firefox"
		},
		{
			string: navigator.vendor,
			subString: "Camino",
			identity: "Camino"
		},
		{		// for newer Netscapes (6+)
			string: navigator.userAgent,
			subString: "Netscape",
			identity: "Netscape"
		},
		{
			string: navigator.userAgent,
			subString: "MSIE",
			identity: "Explorer",
			versionSearch: "MSIE"
		},
		{
			string: navigator.userAgent,
			subString: "Gecko",
			identity: "Mozilla",
			versionSearch: "rv"
		},
		{ 		// for older Netscapes (4-)
			string: navigator.userAgent,
			subString: "Mozilla",
			identity: "Netscape",
			versionSearch: "Mozilla"
		}
	],
	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 animationsDisabled = BrowserDetect.browser == "Explorer" && BrowserDetect.version < 7;
var landingElem = null;
var hiddenlandingElem = null;
var contentElem = null;

var moveLandingInTween = null;
var showContentTween = null;
var hideContentTween = null;

function initLandingAnimation(){
	if( landingElem != null ) return;
	
	landingElem = document.getElementById('lpContainer');
	contentElem = document.getElementById('contentWrap');
	hiddenlandingElem = document.getElementById('lpHidden');
	
	showContentTween = new Tween(contentElem.style,'marginTop',Tween.strongEaseOut,-contentElem.offsetHeight,0,1,'px');
	showContentTween.onMotionStarted = function(){setContentClassAttributes(contentElem, false)};	
	
	hideContentTween = new Tween(contentElem.style,'marginTop',Tween.strongEaseOut,0,-contentElem.offsetHeight,1,'px');
	hideContentTween.onMotionStarted = function(){
		setContentClassAttributes(hiddenlandingElem, true);
	};
	hideContentTween.onMotionFinished = function(){
		contentHidden();
	};
}

function insertBodyClassAttr( show ){
	var docElem = document.getElementsByTagName( "body" )[0];
	if( !show ){
		if( docElem.className.indexOf( "landingpage" ) >= 0 ){
			docElem.className = docElem.className.replace(/landingpage/g, "");
			return;
		}
	}
	else{
		if( docElem.className.indexOf( "landingpage" ) < 0 ){
			docElem.className = docElem.className + " landingpage";
		}
	}
	
}

function contentHidden(){
	setContentClassAttributes(landingElem, false);
	setContentClassAttributes(contentElem, true);
	moveLandingInTween = new Tween(landingElem.style,'left',Tween.backEaseOut,getOutPosition(),0,.5,'px'); 
	moveLandingInTween.onMotionFinished = function(){
		insertBodyClassAttr( true );
	}
	moveLandingInTween.start();
}

function setContentClassAttributes( elem, insertHideAttribute ){
	var oldClassAttrs = elem.className;
	var newClassAttrs = "";
	if( insertHideAttribute && oldClassAttrs.indexOf( 'hide' ) < 0 ) {
		newClassAttrs = oldClassAttrs + " hide";
	}
	else if( !insertHideAttribute && oldClassAttrs.indexOf( 'hide' ) >= 0 ){
		newClassAttrs = oldClassAttrs.replace(/hide/g, "");
	}
	elem.className = newClassAttrs;
}


function showLanding( src ){
	if( animationsDisabled ){
		window.location.href = src;
		return;
	}
	
	landingPageCurrentVisible = true;
	initLandingAnimation();
	hideContentTween.start();
}

function getOutPosition(){
	var rest = Math.round( (screen.availWidth - contentElem.offsetWidth ) / 2 );
	return contentElem.offsetWidth + rest - 30;
}

function hideLanding( src ) {
	if( animationsDisabled ){
		window.location.href = src;
		return;
	}
	
	landingPageCurrentVisible = false;
	initLandingAnimation();
	insertBodyClassAttr( false );
	moveLandingOutTween = new Tween(landingElem.style,'left',Tween.backEaseOut,0,getOutPosition(),1,'px');
	moveLandingOutTween.onMotionFinished = function(){
		setContentClassAttributes(landingElem, true);
		setContentClassAttributes(hiddenlandingElem, false);
		showContentTween.start()
	};
	moveLandingOutTween.start();
}

function landingKlickHandler(e){
	var newLocation = this.getAttribute("href") + "?landingPage=" + landingPageName + ";false";
	for( var i=0; i < otherParms.length; i++){
		newLocation += "&" + otherParms[i][0] + "=" + otherParms[i][1];
	}
	window.location.href = newLocation;
	return cancelEvent(e);
}

function validLandingPageUrl(){
	if( window.location.href.indexOf("?") < 0 ) return false;
	var lc = window.location.href.split( "?" );
	var queryString = lc[1];
	var params = queryString.split( "&" );
	for( var i=0; i<params.length; i++ ){
		var keyVal = params[i].split( "=" );
		if( keyVal[0] == "landingPage" ){
			return keyVal[1].indexOf( ";true" ) >= 0 || keyVal[1].indexOf( ";false" ) >= 0;
		}
	}
	return false;
}

function cancelEvent(e) {
  if(!e) e = window.event;
  if(e.stopPropagation) e.stopPropagation();
  if(e.preventDefault) e.preventDefault();
  e.cancelBubble = true;
  e.cancel = true;
  e.returnValue = false;
  return false;
}

function parseQueryString(){
	if( window.location.href.indexOf("?") < 0 ) return;
	var lc = window.location.href.split( "?" );
	docLocation = lc[0];
	otherParms = new Array();
	var queryString = lc[1];
	var params = queryString.split( "&" );
	for( var i=0; i<params.length; i++ ){
		var keyVal = params[i].split( "=" );
		if( keyVal[0] == "landingPage" ) {
			landingPageName = document.landingPageNameInjection;
			landingPageCurrentVisible = landingPageVisible = document.landingPageVisibleInjection == "true";
			continue;
		}
		otherParms.push( keyVal );
	}
}

function parseQueryStringFromLocationHref(){
	if( window.location.href.indexOf("?") < 0 ) return;
	var lc = window.location.href.split( "?" );
	docLocation = lc[0];
	otherParms = new Array();
	var queryString = lc[1];
	var params = queryString.split( "&" );
	for( var i=0; i<params.length; i++ ){
		var keyVal = params[i].split( "=" );
		if( keyVal[0] == "landingPage" ) {
			var lpParams = keyVal[1].split(";");
			landingPageName = lpParams[0];
			landingPageCurrentVisible = landingPageVisible = lpParams[1] == "true";
			continue;
		}
		otherParms.push( keyVal );
	}
}


function initLanding(){
	if( animationsDisabled ) return;
	parseQueryString();
	var elems = ['a'];
	var len = elems.length;
	for ( i=0; i<len; i++ ) {
		var current = document.getElementsByTagName(elems[i]);
		var curLen = current.length;
		for ( j=0; j<curLen; j++ ) {
			var hrefAttr = current[j].getAttribute('href');
			var targetAttr = current[j].getAttribute('target');
			var onclickAttr = current[j].getAttribute('onclick');
			if( hrefAttr == null || hrefAttr.length == 0 || onclickAttr != null || ( targetAttr != null && targetAttr == "_blank" ) ) continue;
			addEvent(current[j],'click',landingKlickHandler);
		}
	}
}

addEvent(window,'load',initLanding);