var _FB =
{
UID:	"",	//user uid
AUTH_TOKEN:	"",	
SESSION_KEY:	"",	
USER_FIRST_NAME:	"",
USER_LAST_NAME:	"",
erase:	function() //_FB: Erasing all values	
{
this.UID	= "";	
this.AUTH_TOKEN	= "";
this.SESSION_KEY	= "";
this.USER_FIRST_NAME	= "";
this.USER_LAST_NAME	= "";	
}
}

var FBCookieWrapper	=
{
set:	function(){	
var str = this.makeStr();

//console.log("FBCookieWrapper: set value into cookie");

CookieManager.setCookie("facebook", str, 365*24*60*60*1000);

},	

erase:	function(){
//console.log("FBCookieWrapper: erase value from cookie");
CookieManager.setCookie("facebook", "", 365*24*60*60*1000);
},	

get:	function(){
//console.log("FBCookieWrapper: retrieve value from cookie and store into _FB.");

var tmpFbObj	= null;
var str = null;

str	= CookieManager.getRawCookie("facebook");	

if(str!=null && str !=""){ 
eval("tmpFbObj = "+str+";"); //parse into an object 
}

if(tmpFbObj != null)
{	
//console.log("FBCookieWrapper: Setting Value from Cookie into _FB");	

_FB.SESSION_KEY	= tmpFbObj.SESSION_KEY;
_FB.UID	= tmpFbObj.UID;
_FB.USER_LAST_NAME = tmpFbObj.USER_LAST_NAME;
_FB.USER_FIRST_NAME = tmpFbObj.USER_FIRST_NAME;

}else
{
//console.log("FBCookieWrapper: Cookie unavailable -- setting null to _FB");

_FB.SESSION_KEY	= null;
_FB.UID	= null;
_FB.USER_LAST_NAME = null;
_FB.USER_FIRST_NAME = null;
}
},

makeStr:	function(){ //convert _FB into flat string because cookiemanager only takes in flat string value
var str = 
"{"+
"UID:\""+_FB.UID +"\","+
"SESSION_KEY:\""+_FB.SESSION_KEY +"\","+
"USER_FIRST_NAME:\""+_FB.USER_FIRST_NAME+"\","+
"USER_LAST_NAME:\""+_FB.USER_LAST_NAME +"\""+
"}";	
//console.log("FBCookieWrapper: converting _FB into flat string.");
return str;
}	
}

var FacebookManager =
{
GeneralUser:	null, //GeneralUser is a reference to user.js when set.

init:	function(GeneralUser)
{
var dataSourceUrl	= null;
this.GeneralUser	= GeneralUser;

//console.log("FacebookManager: initializing");	

FBCookieWrapper.get(); //Trying to load Data Into _FB

if(_FB.UID != null && _FB.UID !="")
{//cookie data was loaded

//console.log("FacebookManager: Cookie Data Avilable");	

this.processFacebookLoginSuccess();
return true;
}
else 
{//cookie data not present

//console.log("FacebookManager: Cookie Data NOT Avilable");	

if(_FB.AUTH_TOKEN != null && _FB.AUTH_TOKEN != "") //check for auth_token param -- spit out by facebook api
{
//console.log("FacebookManager: Got Auth Token");	
dataSourceUrl = this.makeDataSourceUrl("facebook.auth.getSession");
this.getSessionKey(dataSourceUrl);	
}
else
{
//console.log("FacebookManager: No Auth Token");
this.processFacebookLoginFailure("No Auth Token");
}	
}	
},

makeDataSourceUrl: function (method, format, callid, uids, fields, version) 
{//Make the Facebook API Request URL

var procAjax	= false;
var date	= null;
var dataSourceUrl = null;

if(version == null || version == "")
{
version = "1.0";
}

if(callid == true);
{
date	= new Date();
callid	= date.getTime();
}	

if(format == null || format == "")
{
format = "XML";
}

//console.log("FacebookManager.makeRequest: Values: method "+method+", format "+format+", callid "+callid+", uids "+uids+", fields "+fields+", version "+version);

switch(method) //Construct the call
{
case "facebook.auth.getSession": ///GET SESSION
//console.log("makeRequest: auth.getSession");
dataSourceUrl = ROOTDIR+'services/facebook/?auth_token='+_FB.AUTH_TOKEN+'&format='+format+'&method='+method+'&v='+version;
break;

case "facebook.users.getInfo": ///GET USER INFO	
//console.log("makeRequest: users.getInfo");
dataSourceUrl = ROOTDIR+'services/facebook/?session_key='+_FB.SESSION_KEY+'&call_id='+callid+'&format='+format+'&method='+method+'&fields='+fields+'&uids='+uids+'&v='+version;
break;	
}

return dataSourceUrl;

},

getSessionKey: function(dataSourceUrl)
{
//console.log("FacebookManager: Getting Session Key");
var callback={
success:this.handleGetSessionKeySuccess,
failure:this.handleGetSessionKeyFailure,
scope: this
};

//console.log("FacebookManager.getSessionKey: " + dataSourceUrl);
try{
YAHOO.util.Connect.asyncRequest('POST', dataSourceUrl, callback, "confirm=1");
}
catch(e)
{ 
this.processFacebookLoginFailure(e);
}
},

handleGetSessionKeyFailure: function(o)
{
this.processFacebookLoginFailure("Session Key Ajax Failure");
},

handleGetSessionKeySuccess:	function(o)
{
var root = o.responseXML.documentElement;
try
{	
var oSessionKey	= root.getElementsByTagName('session_key')[0].firstChild.nodeValue;
var oUid	= root.getElementsByTagName('uid')[0].firstChild.nodeValue;
var oExpires	= root.getElementsByTagName('expires')[0].firstChild.nodeValue;
var dataSourceUrl =null;	

_FB.SESSION_KEY	= oSessionKey;
_FB.UID	= oUid;

//get user info right away
dataSourceUrl	= this.makeDataSourceUrl("facebook.users.getInfo", "XML", true, _FB.UID, "last_name,first_name");
this.getUsersInfo(dataSourceUrl);	
this.setUserInfoToCookie();	//put sessionID into cookie first for retrieving playlist usage.

}
catch(e)
{
this.processFacebookLoginFailure(e);
}	
},

getUsersInfo: function(dataSourceUrl)
{
//console.log("FacebookManager: Getting Users Info");
var callback={
success:this.handleGetUsersInfoSuccess,
failure:this.handleGetUsersInfoFailure,
scope: this
};

//console.log("FacebookManager.GetUsersInfo: " + dataSourceUrl);
try{
YAHOO.util.Connect.asyncRequest('POST', dataSourceUrl, callback, "confirm=1");
}
catch(e)
{ 
this.processFacebookLoginFailure(e);
}
},

handleGetUsersInfoSuccess:	function(o)
{
var root = o.responseXML.documentElement;
try
{
var oFirstName	= root.getElementsByTagName('first_name')[0].firstChild.nodeValue;
var oLastName	= root.getElementsByTagName('last_name')[0].firstChild.nodeValue;

_FB.USER_FIRST_NAME	= oFirstName;
_FB.USER_LAST_NAME	= oLastName;

FBCookieWrapper.set(); //store into cookie
this.processFacebookLoginSuccess();

}
catch(e)
{
this.processFacebookLoginFailure(e);
}	
},

handleGetUsersInfoFailed:	function(o)
{

this.processFacebookLoginFailure("Get Users Info Ajax Failure");
},

processFacebookLogout: function()
{
this.GeneralUser.showFacebookButton();
this.GeneralUser.hideFacebookLogout();

FBCookieWrapper.erase();
_FB.erase();
this.GeneralUser.processSignOutResetAll();
this.GeneralUser.loadAnonSession(); //calling user.js and load Anon Session

},

processFacebookLoginSuccess:	function(o)
{	
//console.log("FacebookManager: processing Great Success");
this.GeneralUser.hideFacebookButton();
this.GeneralUser.showFacebookLogout();	
this.setUserInfoToCookie();	
this.GeneralUser.displayUsername();	
},

processFacebookLoginFailure:	function(e)
{
//console.log("FacebookManager: Processing General Failure. " + e);
FBCookieWrapper.erase();
_FB.erase();	
this.GeneralUser.showFacebookButton();
this.GeneralUser.hideFacebookLogout();
this.GeneralUser.loadAnonSession(); //calling user.js and load Anon Session
},

setUserInfoToCookie:	function()
{
//console.log("FacebookManager: Setting user info to Cookie");
this.GeneralUser.acctType	= "Facebook"; //set User obj accttype
this.GeneralUser.userObj.displayName	= _FB.USER_FIRST_NAME + " "+ _FB.USER_LAST_NAME;	
this.GeneralUser.userObj.sessionid	= _FB.SESSION_KEY;
this.GeneralUser.userObj.id	= _FB.UID;

//console.log("FacebookManager: Setting user info to Cookie: "+this.GeneralUser.acctType);
//console.log("FacebookManager: Setting user info to Cookie: "+this.GeneralUser.userObj.id);
//console.log("FacebookManager: Setting user info to Cookie: "+this.GeneralUser.userObj.displayName);
//console.log("FacebookManager: Setting user info to Cookie: "+this.GeneralUser.userObj.sessionid);

this.GeneralUser.cookie.setCookie("ACCTTYPE", this.GeneralUser.acctType, this.GeneralUser.cookieLife); //set cookie
this.GeneralUser.cookie.setCookie("USERID", this.GeneralUser.userObj.id, this.GeneralUser.cookieLife); //set cookie
this.GeneralUser.cookie.setCookie("DISPLAYNAME", this.GeneralUser.userObj.displayName, this.GeneralUser.cookieLife);	
this.GeneralUser.cookie.setCookie("SESSID", this.GeneralUser.userObj.id, this.GeneralUser.cookieLife);	
this.GeneralUser.cookie.setCookie("ANON", "false", this.GeneralUser.cookieLife);
}

}