//global 2 dimensional javascript shopping cart array
var toPurchase = new Array();
var frmAction = "";
var order_total = 0;

function isVisible(obj)
{
    if (obj == document) return true

    if (!obj) return false
    if (!obj.parentNode) return false
    if (obj.style) {
        if (obj.style.display == 'none') return false
        if (obj.style.visibility == 'hidden') return false
    }

    //Try the computed style in a standard way
    if (window.getComputedStyle) {
        var style = window.getComputedStyle(obj, "")
        if (style.display == 'none') return false
        if (style.visibility == 'hidden') return false
    }

    //Or get the computed style using IE's silly proprietary way
    var style = obj.currentStyle
    if (style) {
        if (style['display'] == 'none') return false
        if (style['visibility'] == 'hidden') return false
    }

    return isVisible(obj.parentNode)
}

// this function is only called as a UI ajax request
function render_product_list(ajax_resp)
{
    // parse the ajax_resp into innerhtml and the target div id
    var data = ajax_resp.split("|||");

    // No Products - just return
    if (data[0] == "") return;
    
    // insert the exam window DOM (HTML) into the div
    document.getElementById(data[1]).innerHTML = data[0];

    var z=0;                              // number of checkboxes (products) in the exam window
    var cb = new Array();                 // stores an array of info about the checkboxes in the exam window
    var dom_arr = new Array();            // store the actual checkbox DOM objects for the exam window

    // parse the exam window DOM to get all the checkboxes (products in the window)
    var inps = document.getElementById(data[1]).getElementsByTagName('input');
    for (var i = 0; i < inps.length; i++)
    {
        if (inps[i].type == "checkbox")
        {
            dom_arr[z] = inps[i];             // get each checkbox DOM object
            cb[z++] = inps[i].id.split("_");  // parse product info from the checkbox objects id
        }
    }

    var course = cb[0][2];                // contains the course no like 500 for CPCU 500
    var checked = 0;                      // product counter for the course/window
    var set = false;                      // nothing done
    var processed = new Array();          // a dup product filter to prevent reprocessing dup aliases

    update_product_counter(0, document.getElementById(course+'_count'))
    
    // check the checkboxes for all selected products in this window
    // and/or map the products to the new window when it changes
    for (var idx=toPurchase.length-1; idx >= 0; idx--)
    {
        if (toPurchase[idx][2] == course) // find selected products listed in this course/window
        {
            set = false;
            for (i = 0; i < cb.length; i++)
            {
                // window has not changed so just check the right boxes
                if (cb[i][3] == toPurchase[idx][3])
                {
                    if (toPurchase[idx][1] == cb[i][1])
                    {
                        set = true;      // product selected
                        break;
                    }
                }

                // window has changed so remap selections to new window if possible
                else if (cb[i][0] == toPurchase[idx][0])
                {
                    if (processed.indexOf(cb[i][1]) == -1) // filter out duplicate products
                    {
                        // update cart/product values to new win/product values
                        var oprice = parseFloat(toPurchase[idx][4]);
                        var nprice = parseFloat(cb[i][4]);

                        toPurchase[idx][1] = processed[processed.length] = cb[i][1]; // new win/product item_seq
                        toPurchase[idx][3] = cb[i][3];                               // new win/product win
                        order_total = (order_total - oprice) + nprice;               // recalc total when window changes
                        toPurchase[idx][4] = nprice;                                 // new win/product item price
                        set = true;                                                  // product selected
                        break;
                    }
                }
            }

            if (set)
            {
                dom_arr[i].checked = true;         // check the checkbox
                update_product_counter(1, document.getElementById(course+'_count'))
            }
            else
            {
                order_total -= parseFloat(toPurchase[idx][4]);
                toPurchase.splice(idx, 1); // no matching product in new window so delete it from JS cart array
            }
            update_order_total();
        }
    }
}

/**
 * This function is used to get products. It uses its arguments array as a flattened associative
 * style to simulate passing named parameters. This style has the key as the element preceeding the
 * value. The function is used to get products when an exam window is changed. If the exam window
 * value is "" then the window is cleared and any seleted items in the window are removed from the
 * cart array.
 **/
function get_products()
{
    var qs = p_store = p_lang = p_prodfam = p_filter_type = p_filter1 = p_filter2 = "";

    for (var i = 0; i < arguments.length; i+=2)
    {
        qs += "&"+arguments[i]+"="+arguments[i+1];

        switch (arguments[i])
        {
            case "p_store"       : p_store       = arguments[i+1]; break;
            case "p_lang"        : p_lang        = arguments[i+1]; break;
            case "p_prodfam"     : p_prodfam     = arguments[i+1]; break;
            case "p_filter_type" : p_filter_type = arguments[i+1]; break;
            case "p_filter1"     : p_filter1     = arguments[i+1]; break;
            case "p_filter2"     : p_filter2     = arguments[i+1]; break;
        }
    }

    if (p_filter_type == "EXAM_SERIES" && p_filter2 == "")  clearSelections(p_filter1);
    else callAfter("/product_picker/product_picker_controller.php?ajax=get_product_list" + qs, "POST", render_product_list);
}

function render_course_list(ajax_resp)
{
    var data = ajax_resp.split("|||");
    if (data[0] == "") return;
    document.getElementById(data[1]).innerHTML = data[0];
}

function clearSelections()
{
    if (arguments.length > 0)
    {
        course = arguments[0];
        for (var i=toPurchase.length -1; i >= 0; i--)
        {
            if (toPurchase[i][2] == course)
            {
                order_total -= parseFloat(toPurchase[i][4]);
                toPurchase.splice(i, 1);
            }
        }

        update_order_total();

        if (document.getElementById(course+"_products_div"))
        {
            document.getElementById(course+"_products_div").innerHTML = "";
            update_product_counter(0, document.getElementById(course+'_count'))
        }
    }
    else
    {
        toPurchase.length = 0;
        var divs = document.body.getElementsByTagName('div');
        for (var i = 0; i < divs.length; i++)
        {
            if (divs[i].id.indexOf("_products_div") > -1)
            {
                var course =  divs[i].id.split("_");
                if (document.getElementById(course[0])) document.getElementById(course[0]).value = "";
                update_product_counter(0, document.getElementById(course[0]+'_count'))
                divs[i].innerHTML = "";
            }
            else if (divs[i].id.indexOf("main_products_list") > -1)
            {
                var inps = divs[i].getElementsByTagName('input');
                for (var j = 0; j < inps.length; j++)
                {
                    if (inps[j].type == "checkbox") inps[j].checked = false;
                }
            }
        }
        update_order_total(order_total*-1)
    }
}

function add_toPurchase(chkbox_obj)
{
    var cb = chkbox_obj.id.split("_");

    // checked so add to cart
    if (chkbox_obj.checked == true)     // CB is checked so add product to JS cart
    {
        toPurchase[toPurchase.length] = cb;
        update_product_counter(1, document.getElementById(cb[2]+'_count'))
        update_order_total(parseFloat(cb[4]));
    }
    else                                // CB is unchecked so delete product from JS cart
    {
        for (var idx = toPurchase.length-1; idx >= 0; idx--)
        {
            if (toPurchase[idx][0] == cb[0] && toPurchase[idx][1] == cb[1])
            {
                toPurchase.splice(idx, 1);
                update_product_counter(-1, document.getElementById(cb[2]+'_count'))
                update_order_total(parseFloat(cb[4])*-1);
                break;
            }
        }
    }
}

function update_product_counter(counter, tdObj)
{
    if (tdObj)
    {
        var div_count = counter != 0 ? parseInt(tdObj.innerHTML,10) + counter : 0;
        tdObj.style.color = div_count > 0 ? "#000000" : "#808080";
        tdObj.style.fontWeight = div_count > 0 ? "bold" : "normal";
        tdObj.innerHTML = div_count;
    }
}

function update_order_total()
{
    total = document.getElementById('order_total');
    if ( isVisible(total))
    {
        if (arguments.length > 0) order_total+=arguments[0];
        document.getElementById('order_total').innerHTML = order_total.toFixed(2);
    }
}

function add_to_cart()
{
    if (toPurchase.length == 0) return; // nothing in the javascript cart so return

    if (arguments.length == 0 || arguments[0] == "")
    {
        var sa  = location.href.split("/");
        var form_action = "https://"+sa[2]+"/www2/webops.SaveMat";
    }
    else var form_action = arguments[0]
	
    var toPurchaseForm = document.createElement("FORM");
    toPurchaseForm.id = "aicpcu_cart";
    toPurchaseForm.action = form_action;
    toPurchaseForm.method = "POST";
    toPurchaseForm.target = "_self";
	
    var newElement = document.createElement("input");
    newElement.setAttribute("name", "P_PARAMS");
    newElement.setAttribute("type", "hidden");
    newElement.setAttribute("value", 0);
    toPurchaseForm.appendChild(newElement);

    for (var idx=0; idx < toPurchase.length; idx++)
    {
        val = (toPurchase[idx][1]+"        ").substring(0,8);
        val += (toPurchase[idx][4]+"        ").substring(0,8);
        val += toPurchase[idx][3];

        var newElement = document.createElement("input");
        newElement.setAttribute("name", "P_PARAMS");
        newElement.setAttribute("type", "hidden");
        newElement.setAttribute("value", val);
        toPurchaseForm.appendChild(newElement);
    }

	//WEBPUBLISH-567, removing the cart form, if there exists one already.
	existing_cart = document.getElementById("aicpcu_cart");
	if(existing_cart){
		existing_cart.parentNode.removeChild(existing_cart);
	}
	
    document.body.appendChild(toPurchaseForm);
	document.getElementById("aicpcu_cart").submit();
}


if(typeof jQuery === "undefined"){
    (function() {
        var script = document.createElement('script');
        script.type = 'text/javascript';
        script.async = false;
        script.src = '/jquery/jquery-1.6.2.min.js';
        document.getElementsByTagName('head')[0].appendChild(script);
    })();
}

window.onload = function (){
    if(typeof $ !== "undefined"){
        jQuery.noConflict();
    }
    jQuery.getCSS = function( url, media ) {
        if (document.createStyleSheet) {
            document.createStyleSheet(url);
        } else {
        jQuery( document.createElement('link') ).attr({
            href: url,
            media: media || 'all',
            type: 'text/css',
            rel: 'stylesheet'
        }).appendTo('head');
    }
    return false;
    };
    jQuery.getCSS('/product_picker/css/picker.css');

    if(jQuery.browser.msie && jQuery.browser.version >= 7){
        jQuery.getCSS('/product_picker/css/ie-picker.css');
    }
    
    jQuery('table.picker_buttons').attr('width','100%');
}