var currencyChanger = Class.create();
currencyChanger.prototype =
{
     initialize: function(divId)
     {
          this.avCurrency = ['KZT', 'USD', 'EUR', 'RUB'];
          this.mainHolder = $(divId);
          this.currHolder = this.mainHolder.getElementsByTagName('div')[0];
          this.switcher = this.mainHolder.getElementsByTagName('span')[0];
		this.inEdit = false;
		this.radio = new Array();
		this.currentCurrency = null;
		this.isNumeric = false;

          var currency_changer_object_copy = this;
          this.switcher.onclick = this.changeCurrency.bindAsEventListener(this);

          Event.observe(this.switcher, 'click', function(event){ currency_changer_object_copy.changeCurrency.bindAsEventListener(currency_changer_object_copy) ;});
          Event.observe(this.switcher, 'mouseover', function(event){ currency_changer_object_copy.switcher.className = 'over';});
          Event.observe(this.switcher, 'mouseout', function(event){ currency_changer_object_copy.switcher.className = 'out';});
     },

     changeCurrency: function()
     {
          if(this.inEdit)
          {
               this.currHolder.innerHTML = this.oldValue;
               this.inEdit = false;
          }
          else
          {
               this.currentCurrency = this.mainHolder.getElementsByTagName('div')[0].getElementsByTagName('span')[0].innerHTML;
          	this.oldValue = this.currHolder.innerHTML;
               this.currHolder.innerHTML = '';
               this.inEdit = true;
               var isRadio = false;

               for(var i=0; i<this.avCurrency.length; i++)
               {
                    var new_div = document.createElement('div');
                    this.currHolder.appendChild(new_div);

                    if(is_IE)
                    {
                         this.radio[i] = document.createElement('<input type="radio" name="currSwitcher">')
                    }
                    else
                    {
                         this.radio[i] = document.createElement('input');
                         this.radio[i].name = 'currSwitcher';
                         this.radio[i].type = 'radio';
                    }
                    this.radio[i].id = 'currency' + i;
                    this.radio[i].value = this.avCurrency[i];
                    this.radio[i].style.verticalAlign = 'middle';
                    this.radio[i].style.borderColor = 'white';
                    this.radio[i].onclick = this.clearText.bindAsEventListener(this);
                    if(this.currentCurrency == this.avCurrency[i])
                    {
                         this.radio[i].checked = true;
                         this.radio[i].defaultChecked = true;
                         isRadio = true;
                    }
                    new_div.appendChild(this.radio[i]);
                    var label = document.createElement('label');
                    label.htmlFor = this.radio[i].id;
                    label.innerHTML = this.avCurrency[i];
                    label.style.cursor = 'pointer';
                    new_div.appendChild(label);

                    Event.observe(this.radio[i], 'keypress', this.checkKey.bindAsEventListener(this));
               }

			this.input = document.createElement('input');
			this.input.type = 'text';
			this.input.id = 'currText';
			this.input.style.width = '30px';
			this.input.style.textAlign = 'right';
			this.input.onfocus = this.clearRadio.bindAsEventListener(this);
			this.currHolder.appendChild(this.input);
			if(!isRadio)
			{
			    this.input.value = this.currentCurrency;
			    this.input.focus();
			}
               Event.observe(this.input, 'keypress', this.checkKey.bindAsEventListener(this));


			var label = document.createElement('label');
   			label.htmlFor = this.input.id;
   			label.innerHTML = 'Ваше значение: ';
   			this.currHolder.insertBefore(label, this.input);

               var button = document.createElement('input');
               button.type = 'button';
               button.className = 'button';
               button.value = 'Сохранить';
               button.style.margin = '2px';
               button.onclick = this.saveCurrency.bindAsEventListener(this);
               this.currHolder.appendChild(button);
          }
     },

     checkKey: function(event)
     {
          var code = event.keyCode;
    		if(code == Event.KEY_RETURN)
    		{
    		     this.saveCurrency();
    		}
     },

     saveCurrency: function()
     {
          this.currencyUserValue = null;
          this.isNumeric = false;

          for(var i=0; i<this.radio.length; i++)
          {
               if(this.radio[i].checked)
               {
                    this.currencyUserValue = this.radio[i].value;
               }
          }


          if(!this.currencyUserValue)
          {
               this.currencyUserValue = this.input.value;
               if(!(/^([0-9]{1,7})([\.]{0,1})([0-9]{0,4})$/.test(this.currencyUserValue)) || (/^([0-9]{1,7})([\.]{1,1})$/.test(this.currencyUserValue)) || this.currencyUserValue == 0 || this.currencyUserValue == '')
               {
                    alert('Введите корректное значение');
                    this.input.focus();
                    return false;
               }
               this.isNumeric = true;
          }

          this.currHolder.innerHTML = _msg_loading;

		var url = 'currency';
		var pars = 'current_currency=' + this.currencyUserValue + '&old=' + this.currentCurrency;
          var currency_changer_object_copy = this;

		var succes = function(t)
		{
		     currency_changer_object_copy.updateCurrency(t, currency_changer_object_copy);
		}

		this.req = new Ajax.Request
		(
			url,
			{
				method: 'get',
				parameters: pars, onComplete: succes
			}
		);
		return true;
     },

     updateCurrency: function(req, obj)
     {
     	var json = eval('(' + req.responseText + ')');
          var prices = document.getElementsByClassName('priceSpan', 'costTable');

		for(var i=0; i<prices.length; i++)
		{
		     var val = parseFloat(prices[i].innerHTML);

		     if(this.isNumeric)
		     {
		          prices[i].innerHTML = Math.round(val * json.old / this.currencyUserValue);
		     }
		     else
		     {
		          prices[i].innerHTML = Math.round(val * json.old / json.currency[this.currencyUserValue]);
		     }
		}

     	obj.currHolder.innerHTML = json.html;
     	obj.inEdit = false;
     },

     clearRadio: function()
     {
          for(var i=0; i<this.radio.length; i++)
          {
               this.radio[i].checked = false;
          }
     },

     clearText: function()
     {
          this.input.value = '';
     }

};