dojo.experimental("dojox.widget.Portlet");
dojo.provide("dojox.widget.Portlet");
dojo.require("dijit.TitlePane");
dojo.require("dojo.fx");

dojo.declare("dojox.widget.Portlet", [dijit.TitlePane, dijit._Container],{
	// summary: A container widget that is designed to be contained
	//		in a dojox.layout.GridContainer. Child widgets can insert
	//		an icon into the title bar of the Portlet, which when
	//		clicked, executes the "toggle" method of the child widget.
	//		A child widget must specify the attribute 
	//		"portletIconClass", and the optional class
	//		"portletIconHoverClass", as well as the 
	//		"toggle" function.

	// resizeChildren: Boolean
	//		If true, when the Portlet is resized, any child widgets
	//		with a 'resize' method have that method called.
	resizeChildren: true,

	// closable: Boolean
	//		If true, a close button is placed in the title bar,
	//		and the Portlet can be hidden. If false, the Portlet
	//		cannot be closed.
	closable: true,

	// _parents: Array
	//		 An array of all the StackContainer widgets that this Portlet
	//		is contained in.	These are used to determine if the portlet
	//		is visible or not.
	_parents: null,

	// _size: Object
	//		Cache of the previous size of the portlet, used to determine
	//		if the size has changed and if the child widgets should be
	//		resized.
	_size: null,

	// dragRestriction: Boolean
	//		To remove the drag capability.
	dragRestriction : false,

	buildRendering: function(){
		this.inherited(arguments);

		// Hide the portlet until it is fully constructed.
		dojo.style(this.domNode, "visibility", "hidden");
	},

	postCreate: function(){
		this.inherited(arguments);

		// Add the portlet classes
		dojo.addClass(this.domNode, "dojoxPortlet");
		dojo.removeClass(this.arrowNode, "dijitArrowNode");
		dojo.addClass(this.arrowNode, "dojoxPortletIcon dojoxArrowDown");
		dojo.addClass(this.titleBarNode, "dojoxPortletTitle");
		dojo.addClass(this.hideNode, "dojoxPortletContentOuter");

		// Choose the class to add depending on if the portlet is draggable or not.
		dojo.addClass(this.domNode, "dojoxPortlet-" + (!this.dragRestriction ? "movable" : "nonmovable"));

		var _this = this;
		if(this.resizeChildren){
			// If children should be resized	when the portlet size changes,
			// listen for items being dropped, when the window is resized,
			// or when another portlet's size changes.

			this.subscribe("/dnd/drop", function(){_this._updateSize();});

			this.subscribe("/Portlet/sizechange", function(widget){_this.onSizeChange(widget);});
			this.connect(window, "onresize", function(){_this._updateSize();});

			// Subscribe to all possible child-selection events that could affect this
			// portlet
			var doSelectSubscribe = dojo.hitch(this, function(id, lastId){
				var widget = dijit.byId(id);
				if(widget.selectChild){
					var s = this.subscribe(id + "-selectChild", function(child){
						var n = _this.domNode.parentNode;

						while(n){
							if(n == child.domNode){
								
								// Only fire this once, as the widget is now visible
								// at least once, so child measurements should be accurate.
								_this.unsubscribe(s);
								_this._updateSize();
								break;
							}
							n = n.parentNode;
						}
					});

					// Record the StackContainer and child widget that this portlet
					// is in, so it can figure out whether or not it is visible.
					// If it is not visible, it will not update it's size dynamically.
					var child = dijit.byId(lastId);
					if(widget && child){
						_this._parents.push({parent: widget, child: child});
					}
				}
			});
			var lastId;
			this._parents = [];

			// Find all parent widgets, and if they are StackContainers,
			// subscribe to their selectChild method calls.
			for(var p = this.domNode.parentNode; p != null; p = p.parentNode){
				var id = p.getAttribute ? p.getAttribute("widgetId") : null;
				if(id){
					doSelectSubscribe(id, lastId);
					lastId = id;
				}
			}
		}
		
		// Prevent clicks on icons from causing a drag to start.
		this.connect(this.titleBarNode, "onmousedown", function(evt){
			if (dojo.hasClass(evt.target, "dojoxPortletIcon")) {
				dojo.stopEvent(evt);
				return false;
			}
			return true;
		});

		// Inform all portlets that the size of this one has changed,
		// and therefore perhaps they have too
		this.connect(this._wipeOut, "onEnd", function(){_this._publish();});
		this.connect(this._wipeIn, "onEnd", function(){_this._publish();});

		if(this.closable){
			this.closeIcon = this._createIcon("dojoxCloseNode", "dojoxCloseNodeHover", dojo.hitch(this, "onClose"));
			dojo.style(this.closeIcon, "display", "");
		}
	},

	startup: function(){
		if(this._started){return;}

		var children = this.getChildren();
		this._placeSettingsWidgets();

		// Start up the children
		dojo.forEach(children, function(child){
			try{
				if(!child.started && !child._started){
					child.startup()
				}
			} 
			catch(e){
				console.log(this.id + ":" + this.declaredClass, e);
			}
		});

		this.inherited(arguments);

		//this._updateSize();
		dojo.style(this.domNode, "visibility", "visible");
	},

	_placeSettingsWidgets: function(){
		// summary: Checks all the children to see if they are instances
		//		of dojox.widget.PortletSettings.	If they are, 
		//		create an icon for them in the title bar which when clicked,
		//		calls their toggle() method.

		dojo.forEach(this.getChildren(), dojo.hitch(this, function(child){
			if(child.portletIconClass && child.toggle && !child.attr("portlet")){
				this._createIcon(child.portletIconClass, child.portletIconHoverClass, dojo.hitch(child, "toggle"));
				dojo.place(child.domNode, this.containerNode, "before");
				child.attr("portlet", this);
				this._settingsWidget = child;
			}
		}));
	},

	_createIcon: function(clazz, hoverClazz, fn){
		// summary: 
		//		creates an icon in the title bar.

		var icon = dojo.create("div",{
			"class": "dojoxPortletIcon " + clazz,
			"waiRole": "presentation"
		});
		dojo.place(icon, this.arrowNode, "before");

		this.connect(icon, "onclick", fn);

		if(hoverClazz){
			this.connect(icon, "onmouseover", function(){
				dojo.addClass(icon, hoverClazz);
			});
			this.connect(icon, "onmouseout", function(){
				dojo.removeClass(icon, hoverClazz);
			});
		}
		return icon;
	},

	onClose: function(evt){
		// summary: 
		//		Hides the portlet. Note that it does not
		//		persist this, so it is up to the client to
		//		listen to this method and persist the closed state
		//		in their own way.
		dojo.style(this.domNode, "display", "none");
	},

	onSizeChange: function(widget){
		// summary:
		//		Updates the Portlet size if any other Portlet
		//		changes its size.
		if(widget == this){
			return;
		}
		this._updateSize();
	},

	_updateSize: function(){
		// summary: 
		//		Updates the size of all child widgets.
		if(!this.open || !this._started || !this.resizeChildren){
			return;
		}
		
		if(this._timer){
			clearTimeout(this._timer);
		}
		// Delay applying the size change in case the size 
		// changes very frequently, for performance reasons.
		this._timer = setTimeout(dojo.hitch(this, function(){
			var size ={
				w: dojo.style(this.domNode, "width"),
				h: dojo.style(this.domNode, "height")
			};
	
			// If the Portlet is in a StackWidget, and it is not
			// visible, do not update the size, as it could
			// make child widgets miscalculate.
			for(var i = 0; i < this._parents.length; i++){
				var p = this._parents[i];
				var sel = p.parent.selectedChildWidget
				if(sel && sel != p.child){
					return;
				}
			}
	
			if(this._size){
				// If the size of the portlet hasn't changed, don't
				// resize the children, as this can be expensive
				if(this._size.w == size.w && this._size.h == size.h){
					return;
				}
			}
			this._size = size;
	
			

			var fns = ["resize", "layout"];
			this._timer = null;
			var kids = this.getChildren();

			dojo.forEach(kids, function(child){
				for(var i = 0; i < fns.length; i++){
					if(dojo.isFunction(child[fns[i]])){
						try{
							child[fns[i]]();
						} catch(e){
							console.log(e);
						}
						break;
					} 
				}
			});	
			this.onUpdateSize();
		}), 100);
	},

	onUpdateSize: function(){
		// summary:
		//		Stub function called when the size is changed.
	},

	_publish: function(){
		// summary: Publishes an event that all other portlets listen to.
		//		This causes them to update their child widgets if their
		//		size has changed.
		dojo.publish("/Portlet/sizechange",[this]);
	},

	_onTitleClick: function(evt){
		if(evt.target == this.arrowNode){
			this.inherited(arguments);
		}
	},

	addChild: function(child){
		// summary: 
		//		Adds a child widget to the portlet.
		this._size = null;
		this.inherited(arguments);
		
		if(this._started){
			this._placeSettingsWidgets();
			this._updateSize();
		}
		if(this._started && !child.started && !child._started){
			child.startup();
		}
	},
	
	destroyDescendants: function(/*Boolean*/ preserveDom){
		this.inherited(arguments);
		if(this._settingsWidget){
			this._settingsWidget.destroyRecursive(preserveDom);
		}
	},
	
	_setCss: function(){
		this.inherited(arguments);
		dojo.style(this.arrowNode, "display", this.toggleable ? "":"none");
	}
});

dojo.declare("dojox.widget.PortletSettings", [dijit._Container, dijit.layout.ContentPane],{
	// summary: 
	//		A settings widget to be used with a dojox.widget.Portlet.
	// description: 
	//		This widget should be placed inside a dojox.widget.Portlet widget.
	//		It is used to set some preferences for that Portlet.	It is essentially
	//		a ContentPane, and should contain other widgets and DOM nodes that
	//		do the real work of setting preferences for the portlet.

	// portletIconClass: String
	//		The CSS class to apply to the icon in the Portlet title bar that is used
	//		to toggle the visibility of this widget.
	portletIconClass: "dojoxPortletSettingsIcon",

	// portletIconHoverClass: String
	//		The CSS class to apply to the icon in the Portlet title bar that is used
	//		to toggle the visibility of this widget when the mouse hovers over it.
	portletIconHoverClass: "dojoxPortletSettingsIconHover",

	postCreate: function(){
		// summary:
		//		Sets the require CSS classes on the widget.

		// Start the PortletSettings widget hidden, always.
		dojo.style(this.domNode, "display", "none");
		dojo.addClass(this.domNode, "dojoxPortletSettingsContainer");

		// Remove the unwanted content pane class.
		dojo.removeClass(this.domNode, "dijitContentPane");
	},

	_setPortletAttr: function(portlet){
		// summary: 
		//		Sets the portlet that encloses this widget.
		this.portlet = portlet;
	},

	toggle: function(){
		// summary: 
		//		Toggles the visibility of this widget.
		var n = this.domNode;
		if(dojo.style(n, "display") == "none"){
			dojo.style(n,{
				"display": "block",
				"height": "1px",
				"width": "auto"
			});
			dojo.fx.wipeIn({
				node: n
			}).play();
		}else{
			dojo.fx.wipeOut({
				node: n,
				onEnd: dojo.hitch(this, function(){
					dojo.style(n,{"display": "none", "height": "", "width":""});
				}
			)}).play();
		}
	}
});

dojo.declare("dojox.widget.PortletDialogSettings", 
	dojox.widget.PortletSettings,{
	// summary: 
	//		A settings widget to be used with a dojox.widget.Portlet, which displays
	//		the contents of this widget in a dijit.Dialog box.

	// dimensions: Array
	//		The size of the dialog to display.	This defaults to [300, 300]
	dimensions: null,

	constructor: function(props, node){
		this.dimensions = props.dimensions || [300, 100];
	},

	toggle: function(){
		// summary: 
		//		Shows and hides the Dialog box.
		if(!this.dialog){
			dojo["require"]("dijit.Dialog");
			this.dialog = new dijit.Dialog({title: this.title});
			
			dojo.body().appendChild(this.dialog.domNode);

			// Move this widget inside the dialog
			this.dialog.containerNode.appendChild(this.domNode);

			dojo.style(this.dialog.domNode,{
				"width" : this.dimensions[0] + "px",
				"height" : this.dimensions[1] + "px"
			});
			dojo.style(this.domNode, "display", "");
		}
		if(this.dialog.open){
			this.dialog.hide();
		}else{
			this.dialog.show(this.domNode);
		}
	}
});
