/************************************************************************************************************
(C) www.dhtmlgoodies.com, March 2006

This is a script from www.dhtmlgoodies.com. You will find this and a lot of other scripts at our website.	

Terms of use:
You are free to use this script as long as the copyright message is kept intact. However, you may not
redistribute, sell or repost it without our permission.

Version:
	1.0	Released	March. 3rd 2006

Thank you!

www.dhtmlgoodies.com
Alf Magne Kalleland

************************************************************************************************************/

var flyingSpeed = 25;
var url_addProductToBasket = 'fly_to_cart_add_product.php';
var url_removeProductFromBasket = 'removeProduct.php';

var shopping_cart_div = false;
var flyingDiv = false;
var currentProductDiv = false;

var shopping_cart_x = false;
var shopping_cart_y = false;

var slide_xFactor = false;
var slide_yFactor = false;

var diffX = false;
var diffY = false;

var currentXPos = false;
var currentYPos = false;

var ajaxObjects = new Array();


function shoppingCart_getTopPos(inputObj)
{		
  var returnValue = inputObj.offsetTop;
  while((inputObj = inputObj.offsetParent) != null){
  	if(inputObj.tagName!='HTML')returnValue += inputObj.offsetTop;
  }
  return returnValue;
}

function shoppingCart_getLeftPos(inputObj)
{
  var returnValue = inputObj.offsetLeft;
  while((inputObj = inputObj.offsetParent) != null){
  	if(inputObj.tagName!='HTML')returnValue += inputObj.offsetLeft;
  }
  return returnValue;
}
	

function addToBasket(product_id,quantity)
{
	if(!shopping_cart_div)shopping_cart_div = document.getElementById('shopping_cart');
	if(!flyingDiv){
		flyingDiv = document.createElement('DIV');
		flyingDiv.style.position = 'absolute';
		document.body.appendChild(flyingDiv);
	}
	
	shopping_cart_x = shoppingCart_getLeftPos(shopping_cart_div);
	shopping_cart_y = shoppingCart_getTopPos(shopping_cart_div);

	currentProductDiv = document.getElementById('slidingProduct' + product_id);

	if(document.getElementById('quantity'))quantity = document.getElementById('quantity').value;

	// Get options if there are any
	if (document.getElementsByName('product_option_list_id'))
	{
		var option_ids = '';
		var optionBox = document.getElementsByName('product_option_list_id');

		for(var no=0;no<optionBox.length;no++){
			if (document.getElementById('product_option_list_' + optionBox[no].value).type == 'radio'){
				var valueBox = document.getElementsByName('product_option_list_' + optionBox[no].value);
				for(var no2=0;no2<valueBox.length;no2++){
					if(valueBox[no2].checked){
						if(option_ids)option_ids = option_ids + ',';
						option_ids = option_ids + valueBox[no2].value;
					}
				}
			} else {
				if(option_ids)option_ids = option_ids + ',';
				option_ids = option_ids + document.getElementById('product_option_list_' + optionBox[no].value).value;
			}
		}
	}

	currentXPos = shoppingCart_getLeftPos(currentProductDiv);
	currentYPos = shoppingCart_getTopPos(currentProductDiv);
	
	diffX = shopping_cart_x - currentXPos;
	diffY = shopping_cart_y - currentYPos;
	
	var shoppingContentCopy = currentProductDiv.cloneNode(true);
	shoppingContentCopy.id='';
	flyingDiv.innerHTML = '';
	flyingDiv.style.left = currentXPos + 'px';
	flyingDiv.style.top = currentYPos + 'px';
	flyingDiv.appendChild(shoppingContentCopy);
	flyingDiv.style.display='block';
	flyingDiv.style.width = currentProductDiv.offsetWidth + 'px';

	flyToBasket(product_id,quantity,option_ids);
}


function flyToBasket(product_id,quantity,option_ids)
{
	var maxDiff = Math.max(Math.abs(diffX),Math.abs(diffY));
	var moveX = (diffX / maxDiff) * flyingSpeed;;
	var moveY = (diffY / maxDiff) * flyingSpeed;	
	
	currentXPos = currentXPos + moveX;
	currentYPos = currentYPos + moveY;
	
	flyingDiv.style.left = Math.round(currentXPos) + 'px';
	flyingDiv.style.top = Math.round(currentYPos) + 'px';	
	
	if(moveX>0 && currentXPos > shopping_cart_x){
		flyingDiv.style.display='none';		
	}
	if(moveX<0 && currentXPos < shopping_cart_x){
		flyingDiv.style.display='none';		
	}

	if(flyingDiv.style.display=='block')setTimeout('flyToBasket(' + product_id + ',' + quantity + ',\'' + option_ids + '\')',10); else ajaxAddProduct(product_id,quantity,option_ids);	
}

function showAjaxBasketContent(ajaxIndex)
{
	// Getting a reference to the shopping cart items table
	var itemBox = document.getElementById('shopping_cart_items');
	
	var productItems = ajaxObjects[ajaxIndex].response.split('|||');	// Breaking response from Ajax into tokens
	
// Comment out check for existing product in cart (because of options), always add a new row
//	if(document.getElementById('shopping_cart_items_product' + productItems[0])){	// A product with this id is already in the basket - just add number items
//		var row = document.getElementById('shopping_cart_items_product' + productItems[0]);
//		var items = row.cells[0].innerHTML /1;
//		items = items + 1;
//		row.cells[0].innerHTML = items;
//}else{	// Product isn't already in the basket - add a new row

	var tr = itemBox.insertRow(-1);
	tr.id = 'shopping_cart_items_product' + productItems[0];
		
	var td = tr.insertCell(-1);
	td.align = 'right';
	td.valign = 'top';
	td.classname = 'infoBoxContents productQuantity';
	td.innerHTML = '<span class="infoBoxContents">'+ productItems[2] +'&nbsp;x&nbsp;</span>'
	
	var td = tr.insertCell(-1);
	td.valign = 'top';
	td.classname = 'infoBoxContents productName';
	td.innerHTML = '<a href="product_info.php?product_id='+ productItems[0] +'"><span class="infoBoxContents">' + productItems[1] + '</span></a>'; 	// Description

	var td = tr.insertCell(-1);
	td.align = 'right';
	td.classname = 'infoBoxContents productPrice';
	td.innerHTML = '<span class="infoBoxContents">'+ productItems[3] + '</span>'; 	// Price	

// Comment out remove option
//		var td = tr.insertCell(-1);
//		var a = document.createElement('A');
//		td.appendChild(a);
//		a.href = '#';
//		a.onclick = function(){ removeProductFromBasket(productItems[0]); };
//		var img = document.createElement('IMG');
//		img.src = 'images/remove.gif';
//		a.appendChild(img);
		//td.innerHTML = '<a href="#" onclick="removeProductFromBasket("' + productItems[0] + '");return false;"><img src="images/remove.gif"></a>';	
//	} 


	updateTotalPrice();
	
	ajaxObjects[ajaxIndex] = false;		
	
}

function updateTotalPrice()
{
	// FINISH - format total price according to currency
	var itemBox = document.getElementById('shopping_cart_items');
	// Calculating total price and showing it below the table with basket items
	var totalPrice = 0;
	if(document.getElementById('shopping_cart_totalprice')){
		for(var no=0;no<itemBox.rows.length;no++){
			totalPrice = totalPrice + (1 * itemBox.rows[no].cells[2].innerHTML.replace(/[^0-9.]/g,''));
		}
		
		// If there are items in the cart, hide the no items text
		if(itemBox.rows.length>0) {
			YAHOO.util.Dom.setStyle('cartNoItems', 'display', 'none');
		}
		// Otherwise, show it.
		else {
			YAHOO.util.Dom.setStyle('cartNoItems', 'display', '');
		}

		document.getElementById('shopping_cart_totalprice').innerHTML = totalPrice.toFixed(2);
		
	}	
	
}

function removeProductFromBasket(product_id)
{
	var productRow = document.getElementById('shopping_cart_items_product' + product_id);
	
	var numberOfItemCell = productRow.cells[0];
	if(numberOfItemCell.innerHTML == '1'){
		productRow.parentNode.removeChild(productRow);	
	}else{
		numberOfItemCell.innerHTML = numberOfItemCell.innerHTML/1 - 1;
	}
	updateTotalPrice();
	ajaxRemoveProduct(product_id);	
}

function ajaxValidateRemovedProduct(ajaxIndex)
{
	if(ajaxObjects[ajaxIndex].response!='OK')alert('Error while removing product from the database');
	
}

function ajaxRemoveProduct(product_id)
{
	var ajaxIndex = ajaxObjects.length;
	ajaxObjects[ajaxIndex] = new sack();
	ajaxObjects[ajaxIndex].requestFile = url_removeProductFromBasket;	// Saving product in this file
	ajaxObjects[ajaxIndex].setVar('product_idToRemove',product_id);
	ajaxObjects[ajaxIndex].onCompletion = function(){ ajaxValidateRemovedProduct(ajaxIndex); };	// Specify function that will be executed after file has been found
	ajaxObjects[ajaxIndex].runAJAX();		// Execute AJAX function		
}

function ajaxAddProduct(product_id,quantity,option_ids)
{
	var ajaxIndex = ajaxObjects.length;
	ajaxObjects[ajaxIndex] = new sack();
	ajaxObjects[ajaxIndex].requestFile = url_addProductToBasket;	// Saving product in this file
	ajaxObjects[ajaxIndex].setVar('product_id',product_id);
	ajaxObjects[ajaxIndex].setVar('quantity',quantity);
	ajaxObjects[ajaxIndex].setVar('option_ids',option_ids);
	ajaxObjects[ajaxIndex].onCompletion = function(){ showAjaxBasketContent(ajaxIndex); };	// Specify function that will be executed after file has been found
	ajaxObjects[ajaxIndex].runAJAX();		// Execute AJAX function		
}