//JS Object : update the cart by ajax actions
var ajaxCart = {
	
	//override every button in the page in relation to the cart
	overrideButtonsInThePage : function(){
		//for every 'add' buttons...
		$('.ajax_add_to_cart_button').unbind('click').click(function(){
			var idProduct =  $(this).attr('rel').replace('ajax_id_product_', '');
			ajaxCart.add(idProduct, null, false, this);
			return false;
		});
		//for product page 'add' button...
		$('body#product p#add_to_cart input').unbind('click').click(function(){
			ajaxCart.add( $('#product_page_product_id').val(), $('#idCombination').val(), true, null, $('#quantity_wanted').val());
			return false;
		});
	
		//for 'delete' buttons in the cart block...
		$('.ajax_cart_block_remove_link').unbind('click').click(function(){
			//retrieve idProduct and idCombination from the displayed product in the block cart
			var firstCut =  $(this).parent().attr('id').replace('cart_block_product_', '');
			var ids = firstCut.split('_');
			//if product has attributes
			if(firstCut[1])
				ajaxCart.remove(ids[0], ids[1]);
			else
				ajaxCart.remove(ids[0]);
			return false;
		});
	},
	
	//try to expand the cart
	expand : function(){
		if ($('#cart_block #cart_block_list').hasClass('collapsed'))
		{
			$('#cart_block #cart_block_summary').slideUp(200, function(){
				$(this).addClass('collapsed').removeClass('expanded');
				$('#cart_block #cart_block_list').slideDown({
					duration: 600,
					complete: function(){$(this).addClass('expanded').removeClass('collapsed');}
				});
			});
			//toogle the button expand/collapse button
			$('#cart_block h4 span#block_cart_expand').fadeOut('slow', function(){
				$('#cart_block h4 span#block_cart_collapse').fadeIn('fast');
			});
			
			//save the expand statut in the user cookie
			$.ajax({
				type: 'GET',
				url: baseDir + 'modules/blockcart/blockcart-set-collapse.php',
				async: true,
				data: 'ajax_blockcart_display=expand'
			});
			
			
		}
	},
	
	//try to collapse the cart
	collapse : function(){
		
		if ($('#cart_block #cart_block_list').hasClass('expanded'))
		{
			$('#cart_block #cart_block_list').slideUp('slow', function(){
				$(this).addClass('collapsed').removeClass('expanded');
				$('#cart_block #cart_block_summary').slideDown(700, function(){
					$(this).addClass('expanded').removeClass('collapsed');
				});
			});
			$('#cart_block h4 span#block_cart_collapse').fadeOut('slow', function(){
				$('#cart_block h4 span#block_cart_expand').fadeIn('fast');
			});
			
			//save the expand statut in the user cookie
			$.ajax({
				type: 'GET',
				url: baseDir + 'modules/blockcart/blockcart-set-collapse.php',
				async: true,
				data: 'ajax_blockcart_display=collapse'
			});
		}
	},
	
	//add a product in the cart via ajax
	add : function(idProduct, idCombination, addedFromProductPage, callerElement, quantity){
		//send the ajax request to the server
		$.ajax({
			type: 'GET',
			url: baseDir + 'cart.php',
			async: true,
			cache: false,
			dataType : "json",
			data: 'add&ajax=true&qty=' + ( (quantity && quantity != null) ? quantity : '1') + '&id_product=' + idProduct + '&token=' + static_token + ( (idCombination && idCombination != null) ? '&ipa=' + idCombination: ''),
			success: function(jsonData)
			{
				//apply 'transfert' effect
				var elementToTransfert = null;
				if (callerElement && callerElement != null)
					$(callerElement).parents().each( function() {
						if ($(this).is('.ajax_block_product')) elementToTransfert = $(this);
					});
				else
					elementToTransfert = $(addedFromProductPage ? 'div#image-block' : ('.ajax_block_product_id_' + idProduct) );
				elementToTransfert.TransferTo({
							to: $('#cart_block').get(0),
							className:'transferProduct',
							duration: 800,
							complete: function () {ajaxCart.updateCart(jsonData)}
				});
			},
			error: function(XMLHttpRequest, textStatus, errorThrown) {alert("TECHNICAL ERROR: unable to add the product.\n\nDetails:\nError thrown: " + XMLHttpRequest + "\n" + 'Text status: ' + textStatus);}
		});
	},
	
	//remove a product from the cart via ajax
	remove : function(idProduct, idCombination){
		//send the ajax request to the server
		$.ajax({
			type: 'GET',
			url: baseDir + 'cart.php',
			async: true,
			cache: false,
			dataType : "json",
			data: 'delete&ajax=true&qty=1&id_product=' + idProduct + '&token=' + static_token + ( (idCombination && idCombination != null) ? '&ipa=' + idCombination: ''),
			success: function(jsonData)	{ajaxCart.updateCart(jsonData)},
			error: function() {alert('ERROR : unable to delete the product');}
		});
	},
	
	//hide the products displayed in the page but no more in the json data
	hideOldProducts : function(jsonData) {
		//delete an eventually removed product of the displayed cart (only if cart is not empty!)
		if($('#cart_block #cart_block_list dl.products').length > 0)
		{
			var removedProductId = null;
			//look for a product to delete...
			$('#cart_block_list dl.products dt').each(function(){
				
				
				//retrieve idProduct and idCombination from the displayed product in the block cart
				var domIdProduct = $(this).attr('id');
				var firstCut =  domIdProduct.replace('cart_block_product_', '');
				var ids = firstCut.split('_');
				
				//try to know if the current product is still in the new list
				var stayInTheCart = false;
				for (aProduct in jsonData.products)
				{
					//we've called the variable aProduct because IE6 bug if this variable is called product
					//if product has attributes
					if (ids[1])
					{
						if (jsonData.products[aProduct]['id'] == ids[0] && jsonData.products[aProduct]['idCombination'] == ids[1]) 
							stayInTheCart = true;
					}
					else 
						if (jsonData.products[aProduct]['id'] == ids[0]) 
							stayInTheCart = true;
				
				}
				//remove product if it's no more in the cart
				if(!stayInTheCart)
				{
					removedProductId = $(this).attr('id');
				}
				
			});
			
			//if there is a removed product, delete it from the displayed block cart
			if (removedProductId != null)
			{
				var firstCut =  removedProductId.replace('cart_block_product_', '');
				var ids = firstCut.split('_');
				
				$('#'+removedProductId).addClass('strike').fadeTo('slow', 0, function(){
					$(this).slideUp('slow', function(){
						$(this).remove();
						///if the cart is now empty, show the 'no product in the cart' message
						if($('#cart_block dl.products dt').length == 0)
						{
							$('p#cart_block_no_products:hidden').slideDown('fast');
							$('div#cart_block dl.products').remove();
						}
					});
				});
				$('dd#cart_block_combination_of_' + ids[0] + (ids[1] ? '_'+ids[1] : '') ).fadeTo('fast', 0, function(){
					$(this).slideUp('fast', function(){
						$(this).remove();
					});
				});
			}
			
		}
	},
	
	//refresh display of vouchers (needed for vouchers in % of the total)
	refreshVouchers : function (jsonData) {
		$(jsonData.discounts).each(function(){
			//fix ie6 bug (one more item 'undefined' in IE6)
			if (this.id != undefined && $('#bloc_cart_voucher_' + this.id).length == 1)
			{
					$('#bloc_cart_voucher_' + this.id + ' td.price').text(this.price);
			}
		});
	},
	
	//display the products witch are in json data but no already displayed
	displayNewProducts : function(jsonData) {
		
		//add every new products or update displaying of every updated products
		$(jsonData.products).each(function(){
			//fix ie6 bug (one more item 'undefined' in IE6)
			if (this.id != undefined)
			{
				//create a container for listing the products and hide the 'no product in the cart' message (only if the cart was empty)
				if ($('div#cart_block dl.products').length == 0)
					$('p#cart_block_no_products:visible').fadeTo('fast', 0, function(){
						$(this).slideUp('fast').fadeTo(0, 1);
					}).before('<dl class="products"></dl>');
			
				//if product is not in the displayed cart, add a new product's line
				var domIdProduct = this.id + (this.idCombination ? '_' + this.idCombination : '');
				if($('#cart_block dt#cart_block_product_'+ domIdProduct ).length == 0)
				{
				
					var content =  '<dt class="hidden" id="cart_block_product_' + domIdProduct + '">';
						 content += '<span class="quantity-formated"><span class="quantity">' + this.quantity + '</span>x</span>';
						  content += '<a href="' + this.link + '" title="' + this.name + '">' + this.name + '</a>';
						  content += '<a class="ajax_cart_block_remove_link" href="' + baseDir + 'cart.php?delete&amp;id_product=' + this.id + '&amp;token=' + static_token + (this.has_attributes ? '&amp;ipa=' + this.attributes : '') + '"> </a>';
						  content += '<span class="price">' + this.priceByLine + '</span>';
						  content += '</dt>';
					if (this.hasAttributes)
						  content += '<dd id="cart_block_combination_of_' + domIdProduct + '" class="hidden"><a href="' + this.link + '" title="' + this.name + '">' + this.attributes + '</a></dd>';
					$('#cart_block dl.products').append(content);

					$('#cart_block dl.products .hidden').slideDown('slow').removeClass('hidden');
				}
				//else update the product's line
				else{
					var jsonProduct = this;
					if($('dt#cart_block_product_' + domIdProduct + ' .quantity').text() != jsonProduct.quantity)
					{
						$('dt#cart_block_product_' + domIdProduct + ' .price').text(jsonProduct.priceByLine);
						$('dt#cart_block_product_' + domIdProduct + ' .quantity').fadeTo('fast', 0, function() {
							$(this).text(jsonProduct.quantity);
							$(this).fadeTo('fast', 1, function(){
								$(this).fadeTo('fast', 0, function(){
									$(this).fadeTo('fast', 1, function(){
										$(this).fadeTo('fast', 0, function(){
											$(this).fadeTo('fast', 1);
										});
									});
								});
							});
						});
					}
				
				}
			}
		});
	},
	
	//genarally update the display of the cart
	updateCart : function(jsonData) {
		//user errors display
		if (jsonData.hasError)
		{
			var errors = '';
			for(error in jsonData.errors)
				//IE6 bug fix
				if(error != 'indexOf')
					errors += jsonData.errors[error] + "\n";
			alert(errors);
		}
		ajaxCart.expand();
		ajaxCart.updateCartEverywhere(jsonData);
		ajaxCart.hideOldProducts(jsonData);
		ajaxCart.displayNewProducts(jsonData);
		ajaxCart.refreshVouchers(jsonData);
		
		//update 'first' and 'last' item classes
		$('#cart_block dl.products dt').removeClass('first_item').removeClass('last_item').removeClass('item');
		$('#cart_block dl.products dt:first').addClass('first_item');
		$('#cart_block dl.products dt:not(:first,:last)').addClass('item');
		$('#cart_block dl.products dt:last').addClass('last_item');
		
		//reset the onlick events in relation to the cart block (it allow to bind the onclick event to the new 'delete' buttons added)
		ajaxCart.overrideButtonsInThePage();
	},
	
	//update general cart informations everywere in the page
	updateCartEverywhere : function(jsonData) {
		$('.ajax_block_cart_total').text(jsonData.total);
		$('.ajax_cart_total').text(jsonData.total);
		$('.ajax_cart_shipping_cost').text(jsonData.shippingCost);
		if(jsonData.nbTotalProducts > 0)
		{
			$('.ajax_cart_no_product:visible').hide();
			$('.ajax_cart_quantity').text(jsonData.nbTotalProducts);

			$('.ajax_cart_quantity:hidden').fadeIn('slow');
			$('.ajax_cart_total:hidden').fadeIn('slow');
			
			if(jsonData.nbTotalProducts > 1)
			{
				$('.ajax_cart_product_txt:visible').hide();
				$('.ajax_cart_product_txt_s:hidden').show();
			}
			else
			{
				$('.ajax_cart_product_txt:hidden').fadeIn('slow');
				$('.ajax_cart_product_txt_s:visible').fadeOut('slow');
			}
		}
		else
		{
			$('.ajax_cart_quantity:visible, .ajax_cart_product_txt_s:visible, .ajax_cart_product_txt:visible, .ajax_cart_total:visible').fadeOut('slow', function(){
				$('.ajax_cart_no_product:hidden').fadeIn('slow');
			});
		}
	}
}

//when document is loaded...
$(document).ready(function(){

	// expand/collapse management
	$('#block_cart_collapse').click(function(){
			ajaxCart.collapse();
	});
	$('#block_cart_expand').click(function(){
			ajaxCart.expand();		
	});
	ajaxCart.overrideButtonsInThePage();
	
});