/*********************************************************************************************\
*       COPYRIGHT © 2010 ENVISION INFORMATION TECHNOLOGIES, LLC.    ALL RIGHTS RESERVED       *
*       DISTRIBUTION, UNAUTHORIZED USE AND MODIFICATION IS STRICTLY PROHIBITED                *
*       ENVISION IT, MADISON, WI    http://www.envisionitllc.com   info@envisionitllc.com     *
\*********************************************************************************************/

function setEComProductImage(imageID)
{
  document.getElementById('eComProductImageLargeImage').src = '/ecommerce/images/product/image' + imageID + '-med.jpg';
  document.getElementById('eComProductImageFullLink').href = '/ecommerce/images/product/image' + imageID + '-full.jpg';
};

function eComAddToCart(id)
{
  var qty = document.getElementById('eComProductQty').value;
  
  if (qty == '')
  {
    alert('You must enter a quantity first');
    return false;
  };
  
  var qty = parseInt(qty);
  
  if (isNaN(qty) || qty < 0)
  {
    alert('You must enter a valid, positive number for the quantity');
    return false;
  };
  
  if (eComHasOptions == true)
  {
    var options = document.getElementById('eComProductOptionSelect');
    
    if (options.selectedIndex < 1)
    {
      alert('You must select a valid product option from the drop down before adding this item to your cart.');
      return;
    };
    
    var optionid = options.options[options.selectedIndex].value;
  }
  else
    optionid = '';
  
  xmlHttp = createHTTPRequest();
  
  xmlHttp.onreadystatechange = function()
  {
    // xmlHttp.readyState
    // 0 The request is not initialized ,1 The request has been set up, 2 The request has been sent, 3 The request is in process, 4 The request is complete 
    if (xmlHttp.readyState == 4)
    {
      var text = xmlHttp.responseText;
      
      // Display ADJ<Adjusted Qty>|<Total Count>|<Reason for adjustment>
      // -or-
      // QTY<Total Count>
      
      // Item added successfully, update the cart total
      if (text.length > 3 && text.substr(0,3) == "QTY")
      {
        var totalqty = parseInt(text.substr(3));
        
        if (totalqty == "" || isNaN(totalqty) == true || totalqty < 0)
          totalqty = 0;
        
        var cartcount = document.getElementById('itemsInCartCount');
        
        cartcount.innerHTML = totalqty;
        
        // if the add to cart link is set to #, do nothing.  If it is set to something other than #, load that page
        if (document.getElementById('eComProductATCBlockLink').href == "#")
          alert('Item added successfully!');
        else
          document.location.href = document.getElementById('eComProductATCBlockLink').href;
      }
      else if (text.length > 3 && text.substr(0,3) == "ADJ")
      {
        var info = text.substr(3);
        
        var values = info.split("|");
        
        var adjustedQty = values[0];
        var totalqty = values[1];
        var reason = values[2];
        
        var cartcount = document.getElementById('itemsInCartCount');
        
        cartcount.innerHTML = totalqty;
        
        alert(reason);
      }
      else
      {
        alert('An error occurred while adding the item to your cart.  Please try again.');
      };
    };
  };
  
  var params = "id=" + escape(id) + "&qty=" + escape(qty) + "&optionid=" + escape(optionid);
  
  xmlHttp.open("POST","/ecommerce/ecommerce_addtocart.php",true);
  
  //Send the proper header information along with the request
  xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  xmlHttp.setRequestHeader("Content-length", params.length);
  xmlHttp.setRequestHeader("Connection", "close");
  
  xmlHttp.send(params);
};

var eComRelatedNextTimer = null;
var eComRelatedNextCount = 0;

function moveRelatedNext()
{
  clearInterval(eComRelatedNextTimer);
  clearInterval(eComRelatedPreviousTimer);
  eComRelatedNextTimer = setInterval('moveRelatedNextStart();', 15);
};

function moveRelatedNextEnd()
{
  clearInterval(eComRelatedNextTimer);
  clearInterval(eComRelatedPreviousTimer);
  eComRelatedNextCount = 0;
};

function moveRelatedNextStart()
{
  var related = document.getElementById('eComRelatedProductsScroll');
  var parent = document.getElementById('eComRelatedProductsList');
  
  var left = parseInt(related.style.left);
  var width = parseInt(related.offsetWidth);
  var parentWidth = parseInt(parent.offsetWidth);
  
  if (isNaN(left))
    left = 0;
  
  eComRelatedNextCount++;
  
  if (eComRelatedNextCount < 20)
    adjust = 2;
  else if (eComRelatedNextCount < 40)
    adjust = 4;
  else if (eComRelatedNextCount < 80)
    adjust = 6;
  else if (eComRelatedNextCount < 120)
    adjust = 10;
  else if (eComRelatedNextCount < 160)
    adjust = 14;
  else if (eComRelatedNextCount < 200)
    adjust = 18;
  else
    adjust = 20;
  
  if (left > (parentWidth-width))
    related.style.left = (left-adjust) + "px";
};

var eComRelatedPreviousTimer = null;
var eComRelatedPreviousCount = 0;

function moveRelatedPrevious()
{
  clearInterval(eComRelatedPreviousTimer);
  clearInterval(eComRelatedNextTimer);
  eComRelatedPreviousTimer = setInterval('moveRelatedPreviousStart();', 15);
};

function moveRelatedPreviousEnd()
{
  clearInterval(eComRelatedPreviousTimer);
  clearInterval(eComRelatedNextTimer);
  eComRelatedPreviousCount = 0;
};

function moveRelatedPreviousStart()
{
  var related = document.getElementById('eComRelatedProductsScroll');
  var parent = document.getElementById('eComRelatedProductsList');
  
  var left = parseInt(related.style.left);
  var width = parseInt(related.offsetWidth);
  var parentWidth = parseInt(parent.offsetWidth);
  
  if (isNaN(left))
    left = 0;
    
  eComRelatedPreviousCount++;
  
  if (eComRelatedPreviousCount < 20)
    adjust = 2;
  else if (eComRelatedPreviousCount < 40)
    adjust = 4;
  else if (eComRelatedPreviousCount < 80)
    adjust = 6;
  else if (eComRelatedPreviousCount < 120)
    adjust = 10;
  else if (eComRelatedPreviousCount < 160)
    adjust = 14;
  else if (eComRelatedPreviousCount < 200)
    adjust = 18;
  else
    adjust = 20;
  
  if (left < 0)
    related.style.left = (left+adjust) + "px";
};

function updateCart()
{
  var products = document.getElementById('eComViewCartTable');
  var updateForm = document.getElementById('viewcartform');
  
  var totalUpdates = 0;
  
  for (var a=1; a < products.rows.length; a++)
  {
    if (products.rows[a].cells[0].childNodes.length < 2)
      continue;
    
    var productid = products.rows[a].cells[0].childNodes[1].value;
    var optionid = products.rows[a].cells[0].childNodes[2].value; // blank if none
    var oldQty = products.rows[a].cells[0].childNodes[3].value;
    var remove = products.rows[a].cells[0].childNodes[0].checked;
    var qty = products.rows[a].cells[2].childNodes[0].value;
    
    if (remove)
      qty = "0";
    
    // verify the qty
    qty = parseInt(qty);
    if (isNaN(qty) || qty < 0 || qty > 999)
    {
      alert('You have an invalid quantity for row number ' + a + '.  Please enter a quantity between 0 and 999.');
      return;
    };
    
    if (oldQty != qty)
    {
      var updateField = document.createElement("input");
      updateField.type = 'hidden';
      updateField.name = "qty_id_" + productid + "_" + optionid;
      updateField.value = qty;
      updateForm.appendChild(updateField);
      
      totalUpdates++;
    };
  };
  
  if (totalUpdates > 0)
    updateForm.submit();
  else
    alert('If you want to make a change to your cart, please make the change, then click "Update Cart."');
};

function trackFeaturedProduct(productId, boxId, pageViewId)
{
  var xmlHttp = createHTTPRequest();
  //productid, boxid, pageviewid
  var params = "productid=" + escape(productId) + "&boxid=" + escape(boxId) + "&pageviewid=" + escape(pageViewId);
  
  xmlHttp.open("POST","/ecommerce/ecommerce_featuredproductclick.php",true);
  
  //Send the proper header information along with the request
  xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  xmlHttp.setRequestHeader("Content-length", params.length);
  xmlHttp.setRequestHeader("Connection", "close");
  
  xmlHttp.send(params);
  
  return true;
};