// WHEN THE DOCUMENT IS READY
$(function(){


	// CHECK IF THERE ARE ANY ITEMS IN THE CART
	var cartHasItems = $('td.jcart-item-qty').html();
	if(cartHasItems === null)
		{
		// DISABLE THE PAYPAL CHECKOUT BUTTON
		$('#jcart-paypal-checkout').attr('disabled', 'disabled');
		}

	// HIDE THE UPDATE AND EMPTY BUTTONS SINCE THESE ARE ONLY USED WHEN JAVASCRIPT IS DISABLED
	$('.jcart-hide').remove();

	// DETERMINE IF THIS IS THE CHECKOUT PAGE BY CHECKING FOR HIDDEN INPUT VALUE
	// SENT VIA AJAX REQUEST TO jcart.php WHICH DECIDES WHETHER TO DISPLAY THE CART CHECKOUT BUTTON OR THE PAYPAL CHECKOUT BUTTON BASED ON ITS VALUE
	// WE NORMALLY CHECK AGAINST REQUEST URI BUT AJAX UPDATE SETS VALUE TO jcart-relay.php
	var isCheckout = $('#jcart-is-checkout').val();

	// IF THIS IS NOT THE CHECKOUT THE HIDDEN INPUT DOESN'T EXIST AND NO VALUE IS SET
	if (isCheckout !== 'true') { isCheckout = 'false'; }


	// WHEN AN ADD-TO-CART FORM IS SUBMITTED
	$('form.jcart').submit(function(){

		// GET INPUT VALUES FOR USE IN AJAX POST
		var itemId = $(this).find('input[name=my-item-id]').val();
		var itemPrice = $(this).find('input[name=my-item-price]').val();
		var itemName = $(this).find('textarea[name=my-item-name]').val();
		var itemQty = $(this).find('input[name=my-item-qty]').val();
		var itemAdd = $(this).find('input[name=my-add-button]').val();
        var item_image = $(this).find('input[name=my-item-image]').val();

		// SEND ITEM INFO VIA POST TO INTERMEDIATE SCRIPT WHICH CALLS jcart.php AND RETURNS UPDATED CART HTML
		$.post('/wp-content/themes/wroughtironbg/jcart/jcart-relay.php', { "my-item-id": itemId, "my-item-price": itemPrice, "my-item-name": itemName, "my-item-qty": itemQty, "my-add-button" : itemAdd , "my-item-image" : item_image }, function(data) {

			// REPLACE EXISTING CART HTML WITH UPDATED CART HTML
			$('#jcart').html(data);
			$('.jcart-hide').remove();
            	var top_item_id = "#head-cart-images #cart-item-" + itemId;
                if($(top_item_id).length==0){
                	$("#cart-item-" + itemId).clone(true).prependTo("#head-cart-images");
                    $(top_item_id).hide();


                    if(document.getElementById('head-cart-images').getElementsByTagName('em').length>7){document.getElementById('head-cart-images').className='head-cart-images-scroll'}
                    else{document.getElementById('head-cart-images').className=''}
                        $(top_item_id).css({"top":"-130px", "width":"0px"}).show();
                        $(top_item_id).animate({"width":"75px"}, function(){
                        		$(top_item_id).animate({"top":"0px"});
                        });
                    


                    $(top_item_id).find("img:first").load(function(){
                    

                    })

                }
               
			});

		// PREVENT DEFAULT FORM ACTION
		return false;

		});


	// WHEN THE VISITOR HITS THEIR ENTER KEY
	// THE UPDATE AND EMPTY BUTTONS ARE ALREADY HIDDEN
	// BUT THE VISITOR MAY UPDATE AN ITEM QTY, THEN HIT THEIR ENTER KEY BEFORE FOCUSING ON ANOTHER ELEMENT
	// THIS MEANS WE'D HAVE TO UPDATE THE ENTIRE CART RATHER THAN JUST THE ITEM WHOSE QTY HAS CHANGED
	// PREVENT ENTER KEY FROM SUBMITTING FORM SO USER MUST CLICK CHECKOUT OR FOCUS ON ANOTHER ELEMENT WHICH TRIGGERS CHANGE FUNCTION BELOW
	$('#jcart').keydown(function(e) {

		// IF ENTER KEY
		if(e.which == 13) {

		// PREVENT DEFAULT ACTION
		return false;
		}
	});


	// JQUERY live METHOD MAKES FUNCTIONS BELOW AVAILABLE TO ELEMENTS ADDED DYNAMICALLY VIA AJAX

	// WHEN A REMOVE LINK IS CLICKED
	$('a.jcart-remove').livequery('click', function(){

		// GET THE QUERY STRING OF THE LINK THAT WAS CLICKED
		var queryString = $(this).attr('href');
		queryString = queryString.split('=');

		// THE ID OF THE ITEM TO REMOVE
		var removeId = queryString[1];

		// SEND ITEM ID VIA GET TO INTERMEDIATE SCRIPT WHICH CALLS jcart.php AND RETURNS UPDATED CART HTML
		$.get('/wp-content/themes/wroughtironbg/jcart/jcart-relay.php', { "jcart_remove": removeId, "jcart_is_checkout":  isCheckout },
			function(data) {

			// REPLACE EXISTING CART HTML WITH UPDATED CART HTML
			$('#jcart').html(data);
			$('.jcart-hide').remove();

            
            $("#cart-item-"+removeId).animate({"top":"-130px"}, function(){
                     $("#cart-item-"+removeId).animate({"width":"0px"}, function(){
                        $("#cart-item-"+removeId).remove();
                        if(document.getElementById('head-cart-images').getElementsByTagName('em').length<8){document.getElementById('head-cart-images').className=''}
                    });           
            })

            
			});

		// PREVENT DEFAULT LINK ACTION
		return false;
	});


	// WHEN AN ITEM QTY CHANGES
	// CHANGE EVENT IS NOT CURRENTLY SUPPORTED BY LIVE METHOD
	// STILL WORKS IN MOST BROWSERS, BUT NOT INTERNET EXPLORER
	// INSTEAD WE SIMULATE THE CHANGE EVENT USING KEYUP AND SET A DELAY BEFORE UPDATING THE CART
	$('#jcart input[type="text"]').livequery('keyup', function(){

		// GET ITEM ID FROM THE ITEM QTY INPUT ID VALUE, FORMATTED AS jcart-item-id-n
		var updateId = $(this).attr('id');
		updateId = updateId.split('-');

		// THE ID OF THE ITEM TO UPDATE
		updateId = updateId[3];

		// GET THE NEW QTY
		var updateQty = $(this).val();

		// AS LONG AS THE VISITOR HAS ENTERED A QTY
		if (updateQty !== '')
			{
			// UPDATE THE CART ONE SECOND AFTER KEYUP
			var updateDelay = setTimeout(function(){

				// SEND ITEM INFO VIA POST TO INTERMEDIATE SCRIPT WHICH CALLS jcart.php AND RETURNS UPDATED CART HTML
				$.post('/wp-content/themes/wroughtironbg/jcart/jcart-relay.php', { "item_id": updateId, "item_qty": updateQty, "jcart_update_item": 'update', "jcart_is_checkout": isCheckout }, function(data) {

					// REPLACE EXISTING CART HTML WITH UPDATED CART HTML
					$('#jcart').html(data);
					$('.jcart-hide').remove();
					});

				}, 1000);
			}

		// IF THE VISITOR PRESSES ANOTHER KEY BEFORE THE TIMER HAS EXPIRED, CLEAR THE TIMER
		// THE NEW KEYDOWN RESULTS IN A NEW KEYUP, TRIGGERING THE KEYUP FUNCTION AGAIN AND RESETTING THE TIMER
		// REPEATS UNTIL THE USER DOES NOT PRESS A KEY BEFORE THE TIMER EXPIRES IN WHICH CASE THE AJAX POST IS EXECUTED
		// THIS PREVENTS THE CART FROM BEING UPDATED ON EVERY KEYSTROKE
		$(this).keydown(function(){
			window.clearTimeout(updateDelay);
			});
		});


	// END THE DOCUMENT READY FUNCTION
	});