/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Academic Free License (AFL 3.0)
 * that is bundled with this package in the file LICENSE_AFL.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/afl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_Adminhtml
 * @copyright   Copyright (c) 2010 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
 */
var varienAccordion = new Class.create();
varienAccordion.prototype = {
    initialize : function(containerId, activeOnlyOne){
        this.containerId = containerId;
        this.activeOnlyOne = activeOnlyOne || false;
        this.container   = $(this.containerId);
        this.items       = $$('#'+this.containerId+' dt');
        this.loader      = new varienLoader(true);

        var links = $$('#'+this.containerId+' dt a');
        for(var i in links){
            if(links[i].href){
                Event.observe(links[i],'click',this.clickItem.bind(this));
                this.items[i].dd = this.items[i].next('dd');
                this.items[i].link = links[i];
            }
        }

        this.initFromCookie();
    },
    initFromCookie : function () {
        var activeItemId, visibility;
        if (this.activeOnlyOne &&
            (activeItemId = Cookie.read(this.cookiePrefix() + 'active-item')) !== null) {
            this.hideAllItems();
            this.showItem(this.getItemById(activeItemId));
        } else if(!this.activeOnlyOne) {
            this.items.each(function(item){
                if((visibility = Cookie.read(this.cookiePrefix() + item.id)) !== null) {
                    if(visibility == 0) {
                        this.hideItem(item);
                    } else {
                        this.showItem(item);
                    }
                }
            }.bind(this));
        }
    },
    cookiePrefix: function () {
        return 'accordion-' + this.containerId + '-';
    },
    getItemById : function (itemId) {
        var result = null;

        this.items.each(function(item){
            if (item.id == itemId) {
                result = item;
                throw $break;
            }
        });

        return result;
    },
    clickItem : function(event){
        var item = Event.findElement(event, 'dt');
        if(this.activeOnlyOne){
            this.hideAllItems();
            this.showItem(item);
            Cookie.write(this.cookiePrefix() + 'active-item', item.id, 30*24*60*60);
        }
        else{
            if(this.isItemVisible(item)){
                this.hideItem(item);
                Cookie.write(this.cookiePrefix() + item.id, 0, 30*24*60*60);
            }
            else {
                this.showItem(item);
                Cookie.write(this.cookiePrefix() + item.id, 1, 30*24*60*60);
            }
        }
        Event.stop(event);
    },
    showItem : function(item){
        if(item && item.link){
            if(item.link.href){
                this.loadContent(item);
            }

            Element.addClassName(item, 'open');
            Element.addClassName(item.dd, 'open');
        }
    },
    hideItem : function(item){
        Element.removeClassName(item, 'open');
        Element.removeClassName(item.dd, 'open');
    },
    isItemVisible : function(item){
        return Element.hasClassName(item, 'open');
    },
    loadContent : function(item){
        if(item.link.href.indexOf('#') == item.link.href.length-1){
            return;
        }
        if (Element.hasClassName(item.link, 'ajax')) {
            this.loadingItem = item;
            this.loader.load(item.link.href, {updaterId : this.loadingItem.dd.id}, this.setItemContent.bind(this));
            return;
        }
        location.href = item.link.href;
    },
    setItemContent : function(content){
        if (content.isJSON) {
            return;
        }
        this.loadingItem.dd.innerHTML = content;
    },
    hideAllItems : function(){
        for(var i in this.items){
            if(this.items[i].id){
                Element.removeClassName(this.items[i], 'open');
                Element.removeClassName(this.items[i].dd, 'open');
            }
        }
    }
}