define([
	"dojo/_base/array", // array.forEach array.indexOf array.map
	"dojo/_base/declare", // declare
	"dojo/_base/fx", // fx.fadeIn fx.fadeOut
	"dojo/dom", // dom.byId
	"dojo/dom-class", // domClass.add
	"dojo/dom-geometry", // domGeometry.getMarginBox domGeometry.position
	"dojo/dom-style", // domStyle.set, domStyle.get
	"dojo/_base/lang", // lang.hitch lang.isArrayLike
	"dojo/_base/sniff", // has("ie")
	"dojo/_base/window", // win.body
	"./_base/manager",	// manager.defaultDuration
	"./place",
	"./_Widget",
	"./_TemplatedMixin",
	"./BackgroundIframe",
	"dojo/text!./templates/Tooltip.html",
	"."		// sets dijit.showTooltip etc. for back-compat
], function(array, declare, fx, dom, domClass, domGeometry, domStyle, lang, has, win,
			manager, place, _Widget, _TemplatedMixin, BackgroundIframe, template, dijit){

/*=====
	var _Widget = dijit._Widget;
	var BackgroundIframe = dijit.BackgroundIframe;
	var _TemplatedMixin = dijit._TemplatedMixin;
=====*/

	// module:
	//		dijit/Tooltip
	// summary:
	//		Defines dijit.Tooltip widget (to display a tooltip), showTooltip()/hideTooltip(), and _MasterTooltip


	var MasterTooltip = declare("dijit._MasterTooltip", [_Widget, _TemplatedMixin], {
		// summary:
		//		Internal widget that holds the actual tooltip markup,
		//		which occurs once per page.
		//		Called by Tooltip widgets which are just containers to hold
		//		the markup
		// tags:
		//		protected

		// duration: Integer
		//		Milliseconds to fade in/fade out
		duration: manager.defaultDuration,

		templateString: template,

		postCreate: function(){
			win.body().appendChild(this.domNode);

			this.bgIframe = new BackgroundIframe(this.domNode);

			// Setup fade-in and fade-out functions.
			this.fadeIn = fx.fadeIn({ node: this.domNode, duration: this.duration, onEnd: lang.hitch(this, "_onShow") });
			this.fadeOut = fx.fadeOut({ node: this.domNode, duration: this.duration, onEnd: lang.hitch(this, "_onHide") });
		},

		show: function(innerHTML, aroundNode, position, rtl, textDir){
			// summary:
			//		Display tooltip w/specified contents to right of specified node
			//		(To left if there's no space on the right, or if rtl == true)
			// innerHTML: String
			//		Contents of the tooltip
			// aroundNode: DomNode || dijit.__Rectangle
			//		Specifies that tooltip should be next to this node / area
			// position: String[]?
			//		List of positions to try to position tooltip (ex: ["right", "above"])
			// rtl: Boolean?
			//		Corresponds to `WidgetBase.dir` attribute, where false means "ltr" and true
			//		means "rtl"; specifies GUI direction, not text direction.
			// textDir: String?
			//		Corresponds to `WidgetBase.textdir` attribute; specifies direction of text.


			if(this.aroundNode && this.aroundNode === aroundNode && this.containerNode.innerHTML == innerHTML){
				return;
			}

			// reset width; it may have been set by orient() on a previous tooltip show()
			this.domNode.width = "auto";

			if(this.fadeOut.status() == "playing"){
				// previous tooltip is being hidden; wait until the hide completes then show new one
				this._onDeck=arguments;
				return;
			}
			this.containerNode.innerHTML=innerHTML;
			
			this.set("textDir", textDir);
			this.containerNode.align = rtl? "right" : "left"; //fix the text alignment

			var pos = place.around(this.domNode, aroundNode,
				position && position.length ? position : Tooltip.defaultPosition, !rtl, lang.hitch(this, "orient"));

			// Position the tooltip connector for middle alignment.
			// This could not have been done in orient() since the tooltip wasn't positioned at that time.
			var aroundNodeCoords = pos.aroundNodePos;
			if(pos.corner.charAt(0) == 'M' && pos.aroundCorner.charAt(0) == 'M'){
				this.connectorNode.style.top = aroundNodeCoords.y + ((aroundNodeCoords.h - this.connectorNode.offsetHeight) >> 1) - pos.y + "px";
				this.connectorNode.style.left = "";
			}else if(pos.corner.charAt(1) == 'M' && pos.aroundCorner.charAt(1) == 'M'){
				this.connectorNode.style.left = aroundNodeCoords.x + ((aroundNodeCoords.w - this.connectorNode.offsetWidth) >> 1) - pos.x + "px";
			}

			// show it
			domStyle.set(this.domNode, "opacity", 0);
			this.fadeIn.play();
			this.isShowingNow = true;
			this.aroundNode = aroundNode;
		},

		orient: function(/*DomNode*/ node, /*String*/ aroundCorner, /*String*/ tooltipCorner, /*Object*/ spaceAvailable, /*Object*/ aroundNodeCoords){
			// summary:
			//		Private function to set CSS for tooltip node based on which position it's in.
			//		This is called by the dijit popup code.   It will also reduce the tooltip's
			//		width to whatever width is available
			// tags:
			//		protected
			this.connectorNode.style.top = ""; //reset to default

			//Adjust the spaceAvailable width, without changing the spaceAvailable object
			var tooltipSpaceAvaliableWidth = spaceAvailable.w - this.connectorNode.offsetWidth;

			node.className = "dijitTooltip " +
				{
					"MR-ML": "dijitTooltipRight",
					"ML-MR": "dijitTooltipLeft",
					"TM-BM": "dijitTooltipAbove",
					"BM-TM": "dijitTooltipBelow",
					"BL-TL": "dijitTooltipBelow dijitTooltipABLeft",
					"TL-BL": "dijitTooltipAbove dijitTooltipABLeft",
					"BR-TR": "dijitTooltipBelow dijitTooltipABRight",
					"TR-BR": "dijitTooltipAbove dijitTooltipABRight",
					"BR-BL": "dijitTooltipRight",
					"BL-BR": "dijitTooltipLeft"
				}[aroundCorner + "-" + tooltipCorner];

			// reduce tooltip's width to the amount of width available, so that it doesn't overflow screen
			this.domNode.style.width = "auto";
			var size = domGeometry.getContentBox(this.domNode);

			var width = Math.min((Math.max(tooltipSpaceAvaliableWidth,1)), size.w);
			var widthWasReduced = width < size.w;

			this.domNode.style.width = width+"px";

			//Adjust width for tooltips that have a really long word or a nowrap setting
			if(widthWasReduced){
				this.containerNode.style.overflow = "auto"; //temp change to overflow to detect if our tooltip needs to be wider to support the content
				var scrollWidth = this.containerNode.scrollWidth;
				this.containerNode.style.overflow = "visible"; //change it back
				if(scrollWidth > width){
					scrollWidth = scrollWidth + domStyle.get(this.domNode,"paddingLeft") + domStyle.get(this.domNode,"paddingRight");
					this.domNode.style.width = scrollWidth + "px";
				}
			}

			// Reposition the tooltip connector.
			if(tooltipCorner.charAt(0) == 'B' && aroundCorner.charAt(0) == 'B'){
				var mb = domGeometry.getMarginBox(node);
				var tooltipConnectorHeight = this.connectorNode.offsetHeight;
				if(mb.h > spaceAvailable.h){
					// The tooltip starts at the top of the page and will extend past the aroundNode
					var aroundNodePlacement = spaceAvailable.h - ((aroundNodeCoords.h + tooltipConnectorHeight) >> 1);
					this.connectorNode.style.top = aroundNodePlacement + "px";
					this.connectorNode.style.bottom = "";
				}else{
					// Align center of connector with center of aroundNode, except don't let bottom
					// of connector extend below bottom of tooltip content, or top of connector
					// extend past top of tooltip content
					this.connectorNode.style.bottom = Math.min(
						Math.max(aroundNodeCoords.h/2 - tooltipConnectorHeight/2, 0),
						mb.h - tooltipConnectorHeight) + "px";
					this.connectorNode.style.top = "";
				}
			}else{
				// reset the tooltip back to the defaults
				this.connectorNode.style.top = "";
				this.connectorNode.style.bottom = "";
			}

			return Math.max(0, size.w - tooltipSpaceAvaliableWidth);
		},

		_onShow: function(){
			// summary:
			//		Called at end of fade-in operation
			// tags:
			//		protected
			if(has("ie")){
				// the arrow won't show up on a node w/an opacity filter
				this.domNode.style.filter="";
			}
		},

		hide: function(aroundNode){
			// summary:
			//		Hide the tooltip

			if(this._onDeck && this._onDeck[1] == aroundNode){
				// this hide request is for a show() that hasn't even started yet;
				// just cancel the pending show()
				this._onDeck=null;
			}else if(this.aroundNode === aroundNode){
				// this hide request is for the currently displayed tooltip
				this.fadeIn.stop();
				this.isShowingNow = false;
				this.aroundNode = null;
				this.fadeOut.play();
			}else{
				// just ignore the call, it's for a tooltip that has already been erased
			}
		},

		_onHide: function(){
			// summary:
			//		Called at end of fade-out operation
			// tags:
			//		protected

			this.domNode.style.cssText="";	// to position offscreen again
			this.containerNode.innerHTML="";
			if(this._onDeck){
				// a show request has been queued up; do it now
				this.show.apply(this, this._onDeck);
				this._onDeck=null;
			}
		},
		
		_setAutoTextDir: function(/*Object*/node){
		    // summary:
		    //	    Resolve "auto" text direction for children nodes
		    // tags:
		    //		private

            this.applyTextDir(node, has("ie") ? node.outerText : node.textContent);
            array.forEach(node.children, function(child){this._setAutoTextDir(child); }, this);
		},
		
		_setTextDirAttr: function(/*String*/ textDir){
		    // summary:
		    //		Setter for textDir.
		    // description:
		    //		Users shouldn't call this function; they should be calling
		    //		set('textDir', value)
		    // tags:
		    //		private
	
            this._set("textDir", typeof textDir != 'undefined'? textDir : "");
    	    if (textDir == "auto"){
    	        this._setAutoTextDir(this.containerNode);
    	    }else{
    	        this.containerNode.dir = this.textDir;
    	    }  		             		        
        }
	});

	dijit.showTooltip = function(innerHTML, aroundNode, position, rtl, textDir){
		// summary:
		//		Static method to display tooltip w/specified contents in specified position.
		//		See description of dijit.Tooltip.defaultPosition for details on position parameter.
		//		If position is not specified then dijit.Tooltip.defaultPosition is used.
		// innerHTML: String
		//		Contents of the tooltip
		// aroundNode: dijit.__Rectangle
		//		Specifies that tooltip should be next to this node / area
		// position: String[]?
		//		List of positions to try to position tooltip (ex: ["right", "above"])
		// rtl: Boolean?
		//		Corresponds to `WidgetBase.dir` attribute, where false means "ltr" and true
		//		means "rtl"; specifies GUI direction, not text direction.
		// textDir: String?
		//		Corresponds to `WidgetBase.textdir` attribute; specifies direction of text.
		if(!Tooltip._masterTT){ dijit._masterTT = Tooltip._masterTT = new MasterTooltip(); }
		return Tooltip._masterTT.show(innerHTML, aroundNode, position, rtl, textDir);
	};

	dijit.hideTooltip = function(aroundNode){
		// summary:
		//		Static method to hide the tooltip displayed via showTooltip()
		return Tooltip._masterTT && Tooltip._masterTT.hide(aroundNode);
	};

	var Tooltip = declare("dijit.Tooltip", _Widget, {
		// summary:
		//		Pops up a tooltip (a help message) when you hover over a node.

		// label: String
		//		Text to display in the tooltip.
		//		Specified as innerHTML when creating the widget from markup.
		label: "",

		// showDelay: Integer
		//		Number of milliseconds to wait after hovering over/focusing on the object, before
		//		the tooltip is displayed.
		showDelay: 400,

		// connectId: String|String[]
		//		Id of domNode(s) to attach the tooltip to.
		//		When user hovers over specified dom node, the tooltip will appear.
		connectId: [],

		// position: String[]
		//		See description of `dijit.Tooltip.defaultPosition` for details on position parameter.
		position: [],

		_setConnectIdAttr: function(/*String|String[]*/ newId){
			// summary:
			//		Connect to specified node(s)

			// Remove connections to old nodes (if there are any)
			array.forEach(this._connections || [], function(nested){
				array.forEach(nested, lang.hitch(this, "disconnect"));
			}, this);

			// Make array of id's to connect to, excluding entries for nodes that don't exist yet, see startup()
			this._connectIds = array.filter(lang.isArrayLike(newId) ? newId : (newId ? [newId] : []),
					function(id){ return dom.byId(id); });

			// Make connections
			this._connections = array.map(this._connectIds, function(id){
				var node = dom.byId(id);
				return [
					this.connect(node, "onmouseenter", "_onHover"),
					this.connect(node, "onmouseleave", "_onUnHover"),
					this.connect(node, "onfocus", "_onHover"),
					this.connect(node, "onblur", "_onUnHover")
				];
			}, this);

			this._set("connectId", newId);
		},

		addTarget: function(/*DOMNODE || String*/ node){
			// summary:
			//		Attach tooltip to specified node if it's not already connected

			// TODO: remove in 2.0 and just use set("connectId", ...) interface

			var id = node.id || node;
			if(array.indexOf(this._connectIds, id) == -1){
				this.set("connectId", this._connectIds.concat(id));
			}
		},

		removeTarget: function(/*DomNode || String*/ node){
			// summary:
			//		Detach tooltip from specified node

			// TODO: remove in 2.0 and just use set("connectId", ...) interface

			var id = node.id || node,	// map from DOMNode back to plain id string
				idx = array.indexOf(this._connectIds, id);
			if(idx >= 0){
				// remove id (modifies original this._connectIds but that's OK in this case)
				this._connectIds.splice(idx, 1);
				this.set("connectId", this._connectIds);
			}
		},

		buildRendering: function(){
			this.inherited(arguments);
			domClass.add(this.domNode,"dijitTooltipData");
		},

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

			// If this tooltip was created in a template, or for some other reason the specified connectId[s]
			// didn't exist during the widget's initialization, then connect now.
			var ids = this.connectId;
			array.forEach(lang.isArrayLike(ids) ? ids : [ids], this.addTarget, this);
		},

		_onHover: function(/*Event*/ e){
			// summary:
			//		Despite the name of this method, it actually handles both hover and focus
			//		events on the target node, setting a timer to show the tooltip.
			// tags:
			//		private
			if(!this._showTimer){
				var target = e.target;
				this._showTimer = setTimeout(lang.hitch(this, function(){this.open(target)}), this.showDelay);
			}
		},

		_onUnHover: function(/*Event*/ /*===== e =====*/){
			// summary:
			//		Despite the name of this method, it actually handles both mouseleave and blur
			//		events on the target node, hiding the tooltip.
			// tags:
			//		private

			// keep a tooltip open if the associated element still has focus (even though the
			// mouse moved away)
			if(this._focus){ return; }

			if(this._showTimer){
				clearTimeout(this._showTimer);
				delete this._showTimer;
			}
			this.close();
		},

		open: function(/*DomNode*/ target){
 			// summary:
			//		Display the tooltip; usually not called directly.
			// tags:
			//		private

			if(this._showTimer){
				clearTimeout(this._showTimer);
				delete this._showTimer;
			}
			Tooltip.show(this.label || this.domNode.innerHTML, target, this.position, !this.isLeftToRight(), this.textDir);

			this._connectNode = target;
			this.onShow(target, this.position);
		},

		close: function(){
			// summary:
			//		Hide the tooltip or cancel timer for show of tooltip
			// tags:
			//		private

			if(this._connectNode){
				// if tooltip is currently shown
				Tooltip.hide(this._connectNode);
				delete this._connectNode;
				this.onHide();
			}
			if(this._showTimer){
				// if tooltip is scheduled to be shown (after a brief delay)
				clearTimeout(this._showTimer);
				delete this._showTimer;
			}
		},

		onShow: function(/*===== target, position =====*/){
			// summary:
			//		Called when the tooltip is shown
			// tags:
			//		callback
		},

		onHide: function(){
			// summary:
			//		Called when the tooltip is hidden
			// tags:
			//		callback
		},

		uninitialize: function(){
			this.close();
			this.inherited(arguments);
		}
	});

	Tooltip._MasterTooltip = MasterTooltip;		// for monkey patching
	Tooltip.show = dijit.showTooltip;		// export function through module return value
	Tooltip.hide = dijit.hideTooltip;		// export function through module return value

	// dijit.Tooltip.defaultPosition: String[]
	//		This variable controls the position of tooltips, if the position is not specified to
	//		the Tooltip widget or *TextBox widget itself.  It's an array of strings with the following values:
	//
	//			* before: places tooltip to the left of the target node/widget, or to the right in
	//			  the case of RTL scripts like Hebrew and Arabic
	//			* after: places tooltip to the right of the target node/widget, or to the left in
	//			  the case of RTL scripts like Hebrew and Arabic
	//			* above: tooltip goes above target node
	//			* below: tooltip goes below target node
	//			* top: tooltip goes above target node but centered connector
	//			* bottom: tooltip goes below target node but centered connector
	//
	//		The list is positions is tried, in order, until a position is found where the tooltip fits
	//		within the viewport.
	//
	//		Be careful setting this parameter.  A value of "above" may work fine until the user scrolls
	//		the screen so that there's no room above the target node.   Nodes with drop downs, like
	//		DropDownButton or FilteringSelect, are especially problematic, in that you need to be sure
	//		that the drop down and tooltip don't overlap, even when the viewport is scrolled so that there
	//		is only room below (or above) the target node, but not both.
	Tooltip.defaultPosition = ["after", "before"];


	return Tooltip;
});