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

        Functions for cart events:
            add items to cart
            inspect items
            remove items from cart
*/

function getQuantity(oUnits)
{
    var quantity = 1;
   if((oUnits.value != "") && (!isNaN(oUnits.value)) && (oUnits.value > 0)) quantity = parseInt(oUnits.value);
   return quantity;
}

function detectAddObjectType(target)
{
    if(target.className == "inspect")
    {
        var oCartContainer = target.parentNode;
        return(new Array("bookArticle",0,1,"I",oCartContainer));
    } else if((target.className == "inspectApproval") && (target.parentNode.className == "lPack"))
    {        
        var packContainer = target.parentNode;   
        var pNum = packContainer.getAttribute('id').substr(4);
        return(new Array("packIndex",pNum,1,"I",packContainer));        
    } else if((target.className == "inspectApproval" || target.className == "inspectApproval bookRequest") && (target.parentNode.className.indexOf("bookContainer") != -1))
    {
        var bookContainer = target.parentNode;
        var pNum = bookContainer.getAttribute('id').substr(4);
        return(new Array("bookIndex",pNum,1,"I",bookContainer));    
    } else if(target.className == "addToOrder" || target.className == "addToOrder bookRequest")
    {
        var oCartContainer = target.parentNode;    
        var quantity = getQuantity(document.getInnerElementByClassName(oCartContainer,'input','bUnits'));
        if(quantity == 'undefined')quantity = 1;
        return(new Array("bookArticle",0,quantity,"B",oCartContainer));
    } else if(target.parentNode.className == "buyPack")
    {
        var packContainer = target.parentNode.parentNode;
        var pNum = packContainer.getAttribute('id').substr(4);
        var quantity = getQuantity(document.getInnerElementByClassName(packContainer,'input','lpUnits'));
        if(quantity == 'undefined')quantity = 1;
        return(new Array("packIndex",pNum,quantity,"B",packContainer));
    } else if(target.parentNode.parentNode.className == "buyBook")
    {
        var bookContainer = target.parentNode.parentNode.parentNode;
        var pNum = bookContainer.getAttribute('id').substr(4);
        var quantity = getQuantity(document.getInnerElementByClassName(bookContainer,'input','bUnits'));
        if(quantity == 'undefined')quantity = 1;
        return(new Array("bookIndex",pNum,quantity,"B",bookContainer));
    }   
}


function detectRemoveObjectType(target)
{
    if(target.parentNode.className == "lPack")
    {
        var packContainer = target.parentNode;
        var pNum = packContainer.getAttribute('id').substr(4);
        return(new Array("packIndex",pNum,packContainer));
    } else if (target.parentNode.className.indexOf("bookContainer") != -1)
    {
        var bookContainer = target.parentNode;
        var pNum = bookContainer.getAttribute('id').substr(4);
        return(new Array("bookIndex",pNum,bookContainer));
    } else if(target.parentNode.getAttribute('id') == "cartControls")
    {        
         var oCartContainer = target.parentNode;
         return(new Array("bookArticle",0,oCartContainer));
    }
}

function addItemToCart(oEvent)
{    
    var target = stopEvent(oEvent);
    if(oCart.items.length < 85)
    {
        //var requestClass = (target.className && target.className.indexOf('Request') != -1) ? target.className : null;
        var requestClass = (target.className) ? target.className : null;
       
        var oItem = detectAddObjectType(target);
        
        if((oItem[0]=="bookIndex")||(oItem[0]=="bookArticle"))
        {
            if(oItem[0]=="bookIndex")
            {
                var book = new Book(oItem[1]);
            } else {
                var book = new Book(0);
            }
            
            book.buyInspect = oItem[3];
            book.addToCart(oCart,oItem[2],requestClass);
            
            if(oItem[0]=="bookIndex")
            {
                book.updateBook(oItem[4],oCart);
                resizeImgContainers();
            } else {         
                book.updateBookDetail(oItem[4],oCart);
            }
        } else if(oItem[0]=="packIndex")
        {
            var pack = new Pack(oItem[1]);
            pack.buyInspect = oItem[3];
            pack.addToCart(oCart,oItem[2],requestClass);
            pack.updatePack(oItem[4],oCart);
        }
    } else {
            alert('You have reached the maximum number of items allowed per order.\nPlease click Checkout to finalise this order before ordering more items.');
           }
          
}

function addItemRequestToCart(oEvent)
{
    var target = stopEvent(oEvent);    
    if(oCart.items.length < 85)
    {
    /*
        var bookPage = (document.forms[0].PageType && document.forms[0].PageType.value == 'onixProduct')? true : null;
        if(!bookPage)
        {
               
        } else{
        
              }
              */
              
        alert('addRequestItemToCart()\n\n' + detectAddObjectType(target));
    } else {
            alert('You have reached the maximum number of items allowed per order.\nPlease click Checkout to finalise this order before ordering more items.');
           }
}

function removeItemFromCart(oEvent)
{
    var target = stopEvent(oEvent);
    var oItem = detectRemoveObjectType(target);
    
    if(oItem[0]=="packIndex")
    {
        var pack = new Pack(oItem[1]);
        pack.removeFromCart(oCart);
        pack.updatePack(oItem[2],oCart);
    } else if((oItem[0]=="bookIndex")||(oItem[0]=="bookArticle"))
    {   
        
        if(oItem[0]=="bookIndex")
        {
            var book = new Book(oItem[1]);
        } else {
            var book = new Book(0);
        }
        
        book.removeFromCart(oCart);
        
        if(oItem[0]=="bookIndex")
        {
            book.updateBook(oItem[2],oCart);
            resizeImgContainers();
        } else {        
            book.updateBookDetail(oItem[2],oCart);
        }
    }
    //alert(oItem);
}

function removeItemRequestFromCart(oEvent)
{
    var target = stopEvent(oEvent);
    alert('removeItemRequestFromCart()');
}



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

        Functions to add to order button in cart
*/

addItemsToCart = function(oEvent)
  {
    
    var target = stopEvent(oEvent);
    if(typeof booksSelected != 'undefined')booksSelected.count = 0;
    
    if((typeof document.forms[0].Subsection != "undefined") && (document.forms[0].Subsection.value == "Titles"))
    {
        if(oCart.items.length < 85)
        {
            var oCartContainer = document.getElementById('cartControls');
            try
            {
                var units = document.getElementById('bUnitsContainer').firstChild;
            } catch(oError){
                
                return false;
            }   
           var quantity = 1;
           if((units.value != "") && (!isNaN(units.value)) && (units.value > 0)) quantity = parseInt(units.value);
           //var book = new Book(0);
           book.buyInspect = "B";
           book.addToCart(oCart,quantity);
           book.updateBookDetail(oCartContainer,oCart); 
       } else {
                    alert('You have reached the maximum number of items allowed per order.\nPlease click Checkout to finalise this order before ordering more items.');
              }
    } else {        
        var items = new Array();
        maxedCart = null;
        items = items.concat(items,getPagePacks(),getPageBooks());
        oCart.updateShoppingSummary();
        resizeImgContainers();
        if(maxedCart)alert('You have reached the maximum number of items allowed per order.\nPlease click Checkout to view the total items and finalise this order before ordering more items.');
    }      
};
  


function getPageBooks()
{
  var books = new Array();
  
  if(document.getElementByClassName('div','bookRow') == "undefined") return books;
  
  var bookRows = document.getElementsByClassName('div','bookRow');
  
  var bookClass = "bookContainer";
  if(division.toLowerCase() != "literacy")bookClass = "bookContainer bookMargin";
  
  for(var i=0; i < bookRows.length; i++)
  {
    //alert(bookRows[i].tagName + "." + bookRows[i].className + "   " + i);
    var bookContainer = document.getInnerElementsByClassName(bookRows[i],'div',bookClass);
    //alert(bookContainer.length + "   " + bookClass);
    for( var n=0; n < bookContainer.length; n++)
    {
   
      var bUnit = document.getInnerElementByClassName(bookContainer[n],'input','bUnits');
      var pNum = bookContainer[n].getAttribute('id').substr(4); 
      if(bUnit && (bUnit.value != "") && (!isNaN(bUnit.value)) && (Number(bUnit.value) > 0))
      {
        if(oCart.items.length < 85)
        {
            var pNum = bookContainer[n].getAttribute('id').substr(4);
            var book = new Book(pNum);
            book.buyInspect = "B";
            book.addToCart(oCart,bUnit.value);
       
            book.updateBook(bookContainer[n],oCart);
        } else {
                    maxedCart = true;
               }
      } else {
        //alert("book " + (n+1) + " has no value");
      }
    }
  }
  return books;
}

function getPagePacks()
{
  var packs = new Array();
  if(document.getElementByClassName('div','levelRow') == "undefined") return packs;
  
  var levelRows = document.getElementsByClassName('div','levelRow');

  for(var i=0; i < levelRows.length; i++)
  {
     var lPacks = document.getInnerElementsByClassName(levelRows[i],'div','lPack');
     for(var n=0; n < lPacks.length; n++)
     {
        var lpUnit = document.getInnerElementByClassName(lPacks[n],'input','lpUnits');
        if(lpUnit && (lpUnit.value != "") && (!isNaN(lpUnit.value)) && (Number(lpUnit.value) > 0))
        {
          if(oCart.items.length < 85)
          {
              var pNum = lPacks[n].getAttribute('id').substr(4);
              var pack = new Pack(pNum);
              pack.buyInspect = "B";
              pack.addToCart(oCart,lpUnit.value);
              pack.updatePack(lPacks[n],oCart);
          } else {
                   maxedCart = true;
                 } 
        } else {
          //alert("pack " + (n+1) + " has no value");
        }
     }  
  }
  return packs;
}





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

        Functions for overview cart
*/

function removefromOverviewCart(event)
{
  var target = stopEvent(event);
  //target.parentNode.parentNode.parentNode.removeChild(target.parentNode.parentNode);
  var i = target.getAttribute('name');
  oCart.removeFromCartOverview(i);
}

/*
function updateOverviewCart(event)
{
  var target = stopEvent(event);
  var oBody = document.getElementById('bodyMiddle');
  var tBody = oBody.getElementsByTagName('tbody');
  var oTR = tBody[0].getElementsByTagName('tr');
  var quantity = new Array();
  
  for(var i=0; i < oTR.length; i++)
  {
    var iQuantity = document.getInnerElementByClassName(oTR[i],'input','units');
   
    if((iQuantity.value != "") && (!isNaN(iQuantity.value)) && (iQuantity.value > -1))
    {
      quantity.push(parseInt(iQuantity.value));    
    } else {
      
      quantity.push(-1);
    }
  }
  
  oCart.updateCartOverview(quantity);
 
}
*/

function updateOverviewCart(event)
{
  var target = stopEvent(event);
  var oBody = document.getElementById('bodyMiddle');
  var tBody = oBody.getElementsByTagName('tbody');
  
  //array to store index of books already requested
  var requested = new Array();
  
  var quantity = new Array();
  quantity.length = oCart.items.length;
  
  //var str = "";
  for(var x = 0; x < tBody.length; x++)
  {
    var oTR = tBody[x].getElementsByTagName('tr');
    
    for(var i = 0; i < oTR.length; i++)
    {
        var itemNum = parseInt(document.getInnerElementByClassName(oTR[i],'input','remove').getAttribute('name'));
        var iQuantity = document.getInnerElementByClassName(oTR[i],'input','units');
        var isbn = oTR[i].getElementsByTagName('td')[0].firstChild.nodeValue;
        
        //if book already requested add it to array
        if(oTR[i].getElementsByTagName('td') != null && oTR[i].getElementsByTagName('td').length == 6)
        {
            requested.push(isbn);
        }
        
        if((iQuantity.value != "") && (!isNaN(iQuantity.value)) && (iQuantity.value > -1))
        {
            quantity[itemNum] = iQuantity.value;    
        } else {
                    quantity[itemNum] = -1;
               }
        //str += '\n' + itemNum + ' = ' + iQuantity;        
    }
  }
  /*
  var str1 = "";
  for(var i = 0; i < quantity.length; i++)
  {
    str1 += '\n[' + i + '] = ' + quantity[i];
  }
  alert(str1);
  */
  //alert(str);
  
  oCart.updateCartOverview(quantity,requested); 
  
  /*
  var quantity = new Array();
  
  for(var i=0; i < oTR.length; i++)
  {
    var iQuantity = document.getInnerElementByClassName(oTR[i],'input','units');
   
    if((iQuantity.value != "") && (!isNaN(iQuantity.value)) && (iQuantity.value > -1))
    {
      quantity.push(parseInt(iQuantity.value));    
    } else {
      
      quantity.push(-1);
    }
  }  
  oCart.updateCartOverview(quantity); 
  */
}


function updateInspectBuy(event)
{
    var target = stopEvent(event);
    oCart.updateInspectBuy(target.name.substring(2),target.value);
    //alert("[" + target.name.substring(2) + "]   " + target.value);
}