/**
*
* File Name 		: Menu.js handeling menu bar
* @author			: Hamidreza Bidgoli <bidgoli.wd@gmail.com>
* @privicy      	: public class
*
*/

(function(){

	BMS.Menu = {
		Model:{
			member_menu_items       : [],
			child_menu_items        : [],
			navigation_url		    : "",
			new_page                : false,
			navigation_item		    : {
				parent_title : '',
				parent_link  : '',
				child_title  : '',
				child_link   : ''
			}
		},

		View:{
			_getMemberMenuBar: function(member_items){
				$V.showNavigationBar(member_items);

				var member_items_temp   = [];
				var manu_container = $get("menu_container");
				var div_body = $ce("div");
				var ul = $ce("ul");
				YAHOO.util.Dom.addClass(div_body, 'bd');
				YAHOO.util.Dom.addClass(ul, 'first-of-type');

				for(var i=0; i<member_items.length; i++){
					var li = $ce("li");
					li.style.width = "120px";

					var link_container = $ce("a");
					var text_container = $ct(member_items[i].title);
					var url = $C._getRealUrl(member_items[i].link);
					YAHOO.util.Dom.addClass(li, 'yuimenubaritem');
					YAHOO.util.Dom.addClass(li, 'first-of-type');
					YAHOO.util.Dom.setStyle(li, 'float', floating);
					YAHOO.util.Dom.addClass(link_container, 'yuimenubaritemlabel');
					link_container.id = member_items[i].id;
					link_container.href = url;
					li.appendChild(link_container);
					link_container.appendChild(text_container);
					ul.appendChild(li);
					$M.child_menu_items.push(member_items[i].subMenu);
				}

				div_body.appendChild(ul);
				manu_container.appendChild(div_body);
				$E._onContentReadyMenu();
			},

			/**
			* showMenuBar public function
			* @param type intteger, type of menu
			* return menu bar
			*/

			showMenuBar: function(type){
				$C._getMemberMenuItems(type);
			},

			/**
			* showNavigationBar public function
			* @param member_items obj, member and submenu items of menu bar
			* return bread crumb
			*/
			showNavigationBar: function(member_items){
				var navigation_bar = $C._getNavigationBar(member_items);
				var navigation_container = $get('navigation_container');

				for(var i=0; i<navigation_bar.length; i++){
					var div_parent  = $ce('div');
					var link_parent = $ce('a');
					var title_parent = $ct(navigation_bar[i].parent_title);
					YAHOO.util.Dom.addClass(div_parent, 'navigatin_item');
					var url = $C._getRealUrl(navigation_bar[i].parent_link);
					link_parent.href = url;
					div_parent.appendChild(link_parent);
					navigation_container.appendChild(div_parent);
					if(navigation_bar[i].child_title.length>1){
						var div_child = $ce('div');
						var link_child = $ce('a');
						var title_child = $ct(navigation_bar[i].child_title);
						var arrow = $ce('span');
						arrow.innerHTML = '&raquo;&nbsp;&nbsp;';
						var url = $C._getRealUrl(navigation_bar[i].child_link);
						link_child.href = url;
						link_child.appendChild(title_child);
						div_child.appendChild(link_child);
						link_parent.innerHTML = '';

						link_parent.appendChild(title_parent);
						link_parent.appendChild(arrow);
						YAHOO.util.Dom.addClass(div_child, 'navigatin_child');
						navigation_container.appendChild(div_child);
					}

				}
			}
		},

		Controller: {
			_getMemberMenuItems: function(type){
				$M.member_menu_items = [];
				var type   = type || 2;
				var query_string = "?c=ghandler&panel=menu&action=menubar&page=getmenubar&type="+type;
				var requestPath = BMS.Config.$basepath + query_string;
				YAHOO.util.Connect.asyncRequest('Get', requestPath, $C._callbackGetMemberMenuItems);
				return $M.member_menu_items;
			},

			_getChildMenuItems: function(member_items){
				$M.child_menu_items = [];
				for(var i=0; i<member_items.length; i++){
					var query_string = "?c=ghandler&panel=menu&action=menubar&page=getmenubar&type="+member_items[i].type+"&itemId="+member_items[i].id;
					var requestPath = BMS.Config.$basepath + query_string;
					YAHOO.util.Connect.asyncRequest('Get', requestPath, $C._callbackGetChildMenuItems);
				}
				return $M.child_menu_items;
			},

			_handleSuccess: function(o){
				var values = YAHOO.lang.JSON.parse(o.responseText);
				if(values != null){
					for(var i=0; i<values.length; i++){
						obj = {code 	: values[i].SMU_CODE,
						id   	: values[i].SMU_ID,
						link 	: values[i].SMU_LINK,
						seq  	: values[i].SMU_SEQ,
						title	: values[i].SMU_TITLE,
						type 	: values[i].SMU_TYPE,
						subMenu	: {parent:values[i].SMU_TITLE, parentLink: values[i].SMU_LINK, value:values[i].submenu}
						};
						$M.member_menu_items.push(obj);
					}
					$V._getMemberMenuBar($M.member_menu_items);
				}
			},

			_handleFailure: function(o){

			},

			_callbackGetMemberMenuItems: {
				success: function(o){$C._handleSuccess(o)},
				failure: function(o){$C._handleFailure(o)}
			},

			_callbackGetChildMenuItems : {
				success: function(o){$C._handleSuccess(o)},
				failure: function(o){$C._handleFailure(o)}
			},

			_getSubMenuData : function(){

				var aSubmenuData = [];
				for(var i=0; i<$M.child_menu_items.length; i++){
					if($M.child_menu_items[i].value != "null"){
						var subMenu = YAHOO.lang.JSON.parse($M.child_menu_items[i].value);
						var itemData = [];
						for(var j=0; j<subMenu.length; j++){
							var url = $C._getRealUrl(subMenu[j].SMU_LINK);
							var itemDataObj = {text : subMenu[j].SMU_TITLE, url: url};
							itemData.push(itemDataObj);
						}
						var subMenuObj  = {
							id 	    : $M.child_menu_items[i].parent,
							itemdata : itemData
						};
						aSubmenuData.push(subMenuObj);
					}else if($M.child_menu_items[i].value == "null"){
						var subMenuObj  = {
							id 	    : $M.child_menu_items[i].parent,
							itemdata : false
						};
						aSubmenuData.push(subMenuObj);
					}
				}

				return aSubmenuData;
			},

			_getNavigationBar: function(member_items){
				var navigation_items = [];
				$M.navigation_url = window.location.search.substr( 1, window.location.search.length-1 );
				for(var i=0; i<member_items.length; i++){
					if( $M.navigation_url == member_items[i].link ){
						$M.navigation_item.parent_title = member_items[i].title;
						$M.navigation_item.parent_link  = member_items[i].link;
						navigation_items.push($M.navigation_item);
						return navigation_items;
					}else{
						var sub_menu = YAHOO.lang.JSON.parse(member_items[i].subMenu.value);
						if( sub_menu != null ){
							for(var j=0; j<sub_menu.length; j++){
								if( $M.navigation_url == sub_menu[j].SMU_LINK){
									$M.navigation_item.parent_title = member_items[i].subMenu.parent;
									$M.navigation_item.parent_link  = member_items[i].subMenu.parentLink;
									$M.navigation_item.child_title  = sub_menu[j].SMU_TITLE;
									$M.navigation_item.child_link   = sub_menu[j].SMU_LINK;
									navigation_items.push($M.navigation_item);
									return navigation_items;
								}
							}
						}
					}
				}
				return navigation_items;
			},

			_getRealUrl: function(url){
				$THIS.new_page = false;
				expression = url.substr(0, 1);
				switch(expression){
					case '#':
					url = '#'
					break;
					case '@':
					url = url.substr(1, url.length-1);
					break;

					case '~':
					url = 'index.php?' + url.substr(1, url.length-1);
					$THIS.new_page = true;
					break;

					default:
					url = 'index.php?' + url;
				}
				return url;
			}
		},

		Event: {
			_onContentReadyMenu: function(){
				YAHOO.util.Event.onContentReady("menu_container", function () {

					var oMenuBar = new YAHOO.widget.MenuBar("menu_container", {
						autosubmenudisplay: true,
						hidedelay: 750,
						lazyload: true });

						var aSubmenuData = $C._getSubMenuData();
						var ua = YAHOO.env.ua,
						oAnim;  // Animation instance
						function onSubmenuBeforeShow(p_sType, p_sArgs) {

							var oBody,
							oElement,
							oShadow,
							oUL;

							if (this.parent) {
								oElement = this.element;
								/*
								Get a reference to the Menu's shadow element and
								set its "height" property to "0px" to syncronize
								it with the height of the Menu instance.
								*/
								oShadow = oElement.lastChild;
								oShadow.style.height = "0px";
								/*
								Stop the Animation instance if it is currently
								animating a Menu.
								*/

								if (oAnim && oAnim.isAnimated()) {
									oAnim.stop();
									oAnim = null;
								}
								/*
								Set the body element's "overflow" property to
								"hidden" to clip the display of its negatively
								positioned <ul> element.
								*/

								oBody = this.body;

								//  Check if the menu is a submenu of a submenu.

								if (this.parent &&
								!(this.parent instanceof YAHOO.widget.MenuBarItem)) {

									/*
									There is a bug in gecko-based browsers and Opera where
									an element whose "position" property is set to
									"absolute" and "overflow" property is set to
									"hidden" will not render at the correct width when
									its offsetParent's "position" property is also
									set to "absolute."  It is possible to work around
									this bug by specifying a value for the width
									property in addition to overflow.
									*/

									if (ua.gecko || ua.opera) {

										oBody.style.width = oBody.clientWidth + "px";

									}

									/*
									Set a width on the submenu to prevent its
									width from growing when the animation
									is complete.
									*/

									if (ua.ie == 7) {
										oElement.style.width = oElement.clientWidth + "px";
									}
								}

								oBody.style.overflow = "hidden";
								/*
								Set the <ul> element's "marginTop" property
								to a negative value so that the Menu's height
								collapses.
								*/
								oUL = oBody.getElementsByTagName("ul")[0];
								oUL.style.marginTop = ("-" + oUL.offsetHeight + "px");
							}
						}

						/*
						"tween" event handler for the Anim instance, used to
						syncronize the size and position of the Menu instance's
						shadow and iframe shim (if it exists) with its
						changing height.
						*/

						function onTween(p_sType, p_aArgs, p_oShadow) {
							if (this.cfg.getProperty("iframe")) {
								this.syncIframe();
							}

							if (p_oShadow) {
								p_oShadow.style.height = this.element.offsetHeight + "px";
							}
						}

						/*
						"complete" event handler for the Anim instance, used to
						remove style properties that were animated so that the
						Menu instance can be displayed at its final height.
						*/

						function onAnimationComplete(p_sType, p_aArgs, p_oShadow) {
							var oBody = this.body,
							oUL = oBody.getElementsByTagName("ul")[0];
							if (p_oShadow) {
								p_oShadow.style.height = this.element.offsetHeight + "px";
							}

							oUL.style.marginTop = "";
							oBody.style.overflow = "";

							//  Check if the menu is a submenu of a submenu.
							if (this.parent &&
							!(this.parent instanceof YAHOO.widget.MenuBarItem)) {

								// Clear widths set by the "beforeshow" event handler
								if (ua.gecko || ua.opera) {
									oBody.style.width = "";
								}

								if (ua.ie == 7) {
									this.element.style.width = "";
								}
							}
						}

						/*
						"show" event handler for each submenu of the MenuBar
						instance - used to kick off the animation of the
						<ul> element.
						*/

						function onSubmenuShow(p_sType, p_sArgs) {

							var oElement,
							oShadow,
							oUL;

							if (this.parent) {
								oElement = this.element;
								oShadow = oElement.lastChild;
								oUL = this.body.getElementsByTagName("ul")[0];
								/*
								Animate the <ul> element's "marginTop" style
								property to a value of 0.
								*/
								oAnim = new YAHOO.util.Anim(oUL,
								{ marginTop: { to: 0 } },
								.5, YAHOO.util.Easing.easeOut);

								oAnim.onStart.subscribe(function () {
									oShadow.style.height = "100%";
								});

								oAnim.animate();

								/*
								Subscribe to the Anim instance's "tween" event for
								IE to syncronize the size and position of a
								submenu's shadow and iframe shim (if it exists)
								with its changing height.
								*/

								if (YAHOO.env.ua.ie) {
									oShadow.style.height = oElement.offsetHeight + "px";
									/*
									Subscribe to the Anim instance's "tween"
									event, passing a reference Menu's shadow
									element and making the scope of the event
									listener the Menu instance.
									*/
									oAnim.onTween.subscribe(onTween, oShadow, this);
								}

								/*
								Subscribe to the Anim instance's "complete" event,
								passing a reference Menu's shadow element and making
								the scope of the event listener the Menu instance.
								*/
								oAnim.onComplete.subscribe(onAnimationComplete, oShadow, this);
							}
						}

						/*
						Subscribe to the "beforerender" event, adding a submenu
						to each of the items in the MenuBar instance.
						*/

						oMenuBar.subscribe("beforeRender", function () {
							if (this.getRoot() == this) {
								for(var i=0; i<aSubmenuData.length; i++){
									if(aSubmenuData[i].itemdata){
										this.getItem(i).cfg.setProperty("submenu", aSubmenuData[i]);
									}
								}
							}
						});

						/*
						Subscribe to the "beforeShow" and "show" events for
						each submenu of the MenuBar instance.
						*/
						oMenuBar.subscribe("beforeShow", onSubmenuBeforeShow);
						oMenuBar.subscribe("show", onSubmenuShow);

						/*
						Call the "render" method with no arguments since the
						markup for this MenuBar instance is already exists in
						the page.
						*/

						oMenuBar.render();
				});
			}
		}
	};
	var $THIS = BMS.Menu;
	var $M    = $THIS.Model;
	var $V    = $THIS.View;
	var $C    = $THIS.Controller;
	var $E	  = $THIS.Event;

	var handleOnAvailable = function(){
		$V.showMenuBar(2);
	}

	YAHOO.util.Event.onAvailable ('menu_container', handleOnAvailable);
})();