/************************************************************************************************************
(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 = '/Modules/ShoppingCart/addProduct.aspx';
var url_removeProductFromBasket = '/Modules/ShoppingCart/removeProduct.aspx';
var txt_totalPrice = 'Total: £';


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

var shopping_cart_x = false;
var shopping_cart_y = false;

var prodXPos = false;
var prodYPos = false;

var slide_xFactor = false;
var slide_yFactor = false;

var diffX = false;
var diffY = false;

var diffBackX = false;
var diffBackY = 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(productId)
{
  
	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' + productId);
	currentXPos = shoppingCart_getLeftPos(currentProductDiv);
	currentYPos = shoppingCart_getTopPos(currentProductDiv);

	prodXPos = currentXPos;
	prodYPos = currentYPos;
	
	diffX = shopping_cart_x - currentXPos;
	diffY = shopping_cart_y - currentYPos;

	diffBackX = shopping_cart_x + currentXPos;
	diffBackY = 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(productId);
	
}


function flyToBasket(productId) {

    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("' + productId + '")', 10); else ajaxAddProduct(productId);

  }

  function flyOutBasket() {

    var maxDiff = Math.max(Math.abs(diffBackX), Math.abs(diffBackY));
    var moveX = (diffBackX / maxDiff) * flyingSpeed; 
    var moveY = (diffBackY / maxDiff) * flyingSpeed;
    //alert(moveX + ":" + currentXPos + ":" + prodYPos);
    currentXPos = currentXPos - moveX;
    currentYPos = currentYPos + (moveY * 2);

    flyingDiv.style.left = Math.round(currentXPos) + 'px';
    flyingDiv.style.top = Math.round(currentYPos) + 'px';


    if (moveX > 0 && currentXPos < prodXPos) {
      
      flyingDiv.style.display = 'none';
    }
    if (moveY < 0 && currentYPos < prodYPos) {
      
      flyingDiv.style.display = 'none';
    }

    if (flyingDiv.style.display == 'block') setTimeout('flyOutBasket()', 10);
  }

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
	if (productItems[2] == -1) {
	  //alert("Sorry, but we only have limited stock of " + productItems[1] + ".");
	  $find('bhOutOfStock').show();
	  document.getElementById("theProductName").innerHTML = productItems[1];
	  document.getElementById("hfOutOfStockProductID").value = productItems[0];
	  flyingDiv.style.display = "block";
	  flyOutBasket();
	}
	else { 	
	
	if(document.getElementById('shopping_cart_items_product' + productItems[0])){	// A product with this id is allready 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 allready 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.innerHTML = '1'; 	// Number of items
		
		var td = tr.insertCell(-1);
		td.innerHTML = productItems[1]; 	// Description
		
		var td = tr.insertCell(-1);
		td.style.textAlign = 'right';
		td.innerHTML = "&pound;" + productItems[2]; 	// Price	
		
		var td = tr.insertCell(-1);
		td.style.textAlign = 'right';
		var a = document.createElement('A');
		td.appendChild(a);
		a.href = '#';
		a.onclick = function(){ removeProductFromBasket(productItems[0]); };
		var img = document.createElement('IMG');
		img.align = 'right';
		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()
{
	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=1;no<itemBox.rows.length;no++)
		{
		  totalPrice = totalPrice + (itemBox.rows[no].cells[0].innerHTML * checkNumeric(itemBox.rows[no].cells[2].innerHTML,itemBox.rows[no].cells[2].innerHTML));
		}		
		document.getElementById('shopping_cart_totalprice').innerHTML = txt_totalPrice + totalPrice.toFixed(2);
		
	}	
	
}

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

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

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

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

function Right(str, n){
    if (n <= 0)
       return "";
    else if (n > String(str).length)
       return str;
    else {
       var iLen = String(str).length;
       return String(str).substring(iLen, iLen - n);
    }
}

function checkNumeric(str)
{
  var checkOK = "0123456789.";
  var newStr = "";
  for (i = 0;  i < str.length;  i++)
  {
    ch = str.charAt(i);
    for (j = 0;  j < checkOK.length;  j++)
    {
      if (ch == checkOK.charAt(j))
      {
        newStr += ch;
      }
    }
  }
  return newStr;
}