var CurrencySetter = new Object();

// an array to store query string parameters for searching
CurrencySetter.qsParams = new Object();
// Indicator if the page is loading or not
CurrencySetter.isLoad = true;
// the decided currency
CurrencySetter.currency = "";
// the country
CurrencySetter.country = "";
// a list of currencies valid per a country
CurrencySetter.validCurrencies = {
   AT : ["EUR"],
   AU : ["AUD", "USD"],
   BE : ["EUR"],
   CA : ["CAD"],
   CH : ["EUR"],
   CN : ["USD"],
   DE : ["EUR"],
   DK : ["DKK", "EUR", "USD"],
   ES : ["EUR"],
   FI : ["EUR"],
   FR : ["EUR"],
   GR : ["EUR"],
   HK : ["HKD"],
   IE : ["EUR"],
   IT : ["EUR"],
   JP : ["JPY"],
   KR : ["KRW"],
   LU : ["EUR"],
   MX : ["USD"],
   NL : ["EUR"],
   NO : ["NOK", "EUR", "USD"],
   NZ : ["NZD"],
   PT : ["EUR"],
   SE : ["SEK", "EUR", "USD"],
   SG : ["SGD"],
   TW : ["TWD"],
   UK : ["GBP"],
   US : ["USD"]
   }

   
// starts the currency gathering process
CurrencySetter.findCurrency = function(){
   CurrencySetter.country  = _tag.WT.z_site_id;
   CurrencySetter.checkQS();
   CurrencySetter.checkCookie();
   CurrencySetter.doDefault();
}


// checks the query string for currency specifications
CurrencySetter.checkQS = function(){
   //alert(CurrencySetter.country);
   var queryString = window.location.search.substring(1);
   var queryStringArray = queryString.split("&");
   for (i=0;i<queryStringArray.length;i++) {
      var nameValuePair = queryStringArray[i].split("=");
      CurrencySetter.qsParams[nameValuePair[0]] = nameValuePair[1];
   }
   
   if(CurrencySetter.qsParams.curr){
      CurrencySetter.setCurrency(CurrencySetter.qsParams.curr);
   }
}


// checks the cookie for currency information if currency not set yet
CurrencySetter.checkCookie = function(){
   if(CurrencySetter.currency == ""){
      var cookie = CurrencySetter.getCookie("cur");
      if(cookie != "" && CurrencySetter.isValid(cookie)){
         CurrencySetter.setCurrency(cookie);
      }
   } 
}


// gets the default currency if currency is not set yet
CurrencySetter.doDefault = function(){
   if(CurrencySetter.currency == ""){
      CurrencySetter.setCurrency(CurrencySetter.validCurrencies[CurrencySetter.country][0]);
   }
}


// checks if the given currency is valid for the given country
CurrencySetter.isValid = function(currency){
   var result = false;
   var currencies = CurrencySetter.validCurrencies[CurrencySetter.country];
   
   currency = currency.toUpperCase();
   for (var i=0; i < currencies.length; i++){
      if(currency == currencies[i]){
         result = true;
      }
   }
   //alert(result);
   return result;
}


// sets a cookie with the given name, value and expiration
CurrencySetter.setCookie = function(c_name,value, expireDays){
   var cookieExpiration = "";
   var path= ";path=/";  // makes cookie available to any path
   var domain = document.domain;
   if(domain.indexOf(".") != -1){  // places it on the main domain
      domain = domain.substr(domain.indexOf(".") + 1);
   }
   //alert("Domain:" + domain);
   
   if(expireDays != null){ // Sets expires date
      var exdate=new Date();
      exdate.setDate(exdate.getDate()+expireDays);
      cookieExpiration = ";expires="+exdate.toGMTString();
   }
   
   var nameValue = c_name+ "=" +escape(value);
   var domain =  ";domain=" + domain;
   
   document.cookie= nameValue + cookieExpiration + path + domain;
   //alert("Cookie Info:" + nameValue + cookieExpiration + path + domain);
   // alert("cookie set:" + CurrencySetter.getCookie("cur"));
}


// gets a cookie with the given name
CurrencySetter.getCookie = function(c_name){
   if (document.cookie.length>0){
      c_start=document.cookie.indexOf(c_name + "=");
      if (c_start!=-1){
         c_start=c_start + c_name.length+1;
         c_end=document.cookie.indexOf(";",c_start);
         if (c_end==-1) {
            c_end=document.cookie.length;
         }
         return unescape(document.cookie.substring(c_start,c_end));
      }
   }
   return "";
}  


// Sets the currency to the given value if valid
CurrencySetter.setCurrency = function(currency){
   currency = currency.toUpperCase();
   if(CurrencySetter.prompt){
      CurrencySetter.prompt.dialog('close');
   }
   if(CurrencySetter.isValid(currency)){
      CurrencySetter.currency = currency;
      //alert("Setting Cookie to: " + currency);
      CurrencySetter.setCookie("cur", currency, 30);
      //alert("Cookie Value:" + CurrencySetter.getCookie("cur"));
      CurrencySetter.redraw();
      if(CurrencySetter.isLoad){
         CurrencySetter.isLoad = false;
      } else{
         CurrencySetter.refresh();
      }
   } else{
     //alert("Currency Not Valid");
   }
}  

// will toggle the currency parameter in links
CurrencySetter.toggleLinks = function(){
   if(CurrencySetter.currency != ""){
      $("a").each(function(){
         var link = $(this).attr("href");
			if(link){
				if(link.match(/[&?]curr/)){
				    link = link.replace(/([&?])curr=[^&?+]*([&?+]?.*)$/gi, "$1curr=" + CurrencySetter.currency + "$2");
				    $(this).attr("href", link);
				}
			}
		});
	}
}

// Redraws the page without a refresh
CurrencySetter.redraw = function(){
   CurrencySetter.toggleCurrency();
	if (CurrencySetter.toggleLinks){
		CurrencySetter.toggleLinks();
	}
}

// Function to overload if refresh of page need on currency change
CurrencySetter.refresh = function(){}

// Loads up the Prompt for switching currencies
CurrencySetter.currencyPrompt = function(){
   // alert(CurrencySetter.promptPage);
   $.get(CurrencySetter.promptPage, function(data){
            var contents = $(data);
            var titleText = contents.find("#title").detach().text();
				if(titleText == ""){ // just in case the old way of <title> is still being used
					titleText = contents.find("title").text();
				}
            var dialogWidth = contents.css("width").replace(/px/gi, "");
            // alert(dialogWidth);
            if(!dialogWidth){
			dialogWidth = 500;
            } else{
			dialogWidth = parseInt(dialogWidth);
		}
            CurrencySetter.prompt = contents.dialog({
      			height: 425,
               width: dialogWidth,
               title: titleText,
               modal: true
      		});
         });
}

// Starts the currency setting when ready
$(window).load(function(){
   CurrencySetter.findCurrency();
   });