// 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').live('submit', function() {
	$('form.jcart .button').attr('disabled', 'disabled'); //////////////////////////////////////////////Por ser lento le desactivo los botones al agregar
		// GET INPUT VALUES FOR USE IN AJAX POST
		var itemId = $(this).find('input[name=imgcarrito-id]').val();
		var itemPrice = $(this).find('input[name=imgcarrito-precio]').val();
		var itemName = $(this).find('input[name=imgcarrito-nom]').val();
		var itemQty = $(this).find('input[name=imgcarrito-cnt]').val();
		var itemAdd = $(this).find('input[name=imgcarrito-agregar]').val();

		// SEND ITEM INFO VIA POST TO INTERMEDIATE SCRIPT WHICH CALLS jcart.php AND RETURNS UPDATED CART HTML
		$.post('imagencont/scripts/carrito/carrito-relay.php', { "imgcarrito-id": itemId, "imgcarrito-precio": itemPrice, "imgcarrito-nom": itemName, "imgcarrito-cnt": itemQty, "imgcarrito-agregar" : itemAdd }, function(data) {

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

		// 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 (e.keyCode == 46 || e.keyCode == 8  || e.keyCode == 9) {
                // let it happen, don't do anything
            }
            else {
                // Ensure that it is a number and stop the keypress
                if ((e.keyCode >= 48 && e.keyCode <= 57) || (e.keyCode >= 96 && e.keyCode <= 105)) {

                }
                else {
                    e.preventDefault();
                }
            }
	

		// 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
	$('#jcart a').live('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('imagencont/scripts/carrito/carrito-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();
			});

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


	// WHEN AN ITEM QTY qES
	// 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"]').live('keyup', function(){

		var sincontrol = $(this).parent().parent().parent().parent().attr('id');
			 //prompt(sincontrol);
		if (sincontrol != 'forma-sinregistro'){
			// 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('imagencont/scripts/carrito/carrito-relay.php', { "item_id": updateId, "item_qty": updateQty, "jcart_update_item": 'actualizar', "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
	});