define(["dojo/_base/lang", "dojo/_base/declare", "dojo/_base/array", "dojo/has", 
		"./CartesianBase", "./_PlotEvents", "./common", "dojox/lang/functional", "dojox/lang/functional/reversed", "dojox/lang/utils", "dojox/gfx/fx"],
	function(lang, declare, arr, has, CartesianBase, _PlotEvents, dc, df, dfr, du, fx){

	/*=====
	declare("dojox.charting.plot2d.__DefaultCtorArgs", dojox.charting.plot2d.__CartesianCtorArgs, {
		// summary:
		//		The arguments used for any/most plots.
	
		// lines: Boolean?
		//		Whether or not to draw lines on this plot.  Defaults to true.
		lines:   true,
	
		// areas: Boolean?
		//		Whether or not to draw areas on this plot. Defaults to false.
		areas:   false,
	
		// markers: Boolean?
		//		Whether or not to draw markers at data points on this plot. Default is false.
		markers: false,
	
		// tension: Number|String?
		//		Whether or not to apply 'tensioning' to the lines on this chart.
		//		Options include a number, "X", "x", or "S"; if a number is used, the
		//		simpler bezier curve calculations are used to draw the lines.  If X, x or S
		//		is used, the more accurate smoothing algorithm is used.
		tension: "",
	
		// animate: Boolean?|Number?
		//		Whether or not to animate the chart to place. When a Number it specifies the duration of the animation.
		//		Default is false.
		animate: false,
	
		// stroke: dojox.gfx.Stroke?
		//		An optional stroke to use for any series on the plot.
		stroke:		{},
	
		// outline: dojox.gfx.Stroke?
		//		An optional stroke used to outline any series on the plot.
		outline:	{},
	
		// shadow: dojox.gfx.Stroke?
		//		An optional stroke to use to draw any shadows for a series on a plot.
		shadow:		{},
	
		// fill: dojox.gfx.Fill?
		//		Any fill to be used for elements on the plot (such as areas).
		fill:		{},

		// filter: dojox.gfx.Filter?
		//		An SVG filter to be used for elements on the plot. gfx SVG renderer must be used and dojox/gfx/svgext must
		//		be required for this to work.
		filter:		{},

		// styleFunc: Function?
		//		A function that returns a styling object for the a given data item.
		styleFunc:	null,
	
		// font: String?
		//		A font definition to be used for labels and other text-based elements on the plot.
		font:		"",
	
		// fontColor: String|dojo.Color?
		//		The color to be used for any text-based elements on the plot.
		fontColor:	"",
	
		// markerStroke: dojo.gfx.Stroke?
		//		An optional stroke to use for any markers on the plot.
		markerStroke:		{},
	
		// markerOutline: dojo.gfx.Stroke?
		//		An optional outline to use for any markers on the plot.
		markerOutline:		{},
	
		// markerShadow: dojo.gfx.Stroke?
		//		An optional shadow to use for any markers on the plot.
		markerShadow:		{},
	
		// markerFill: dojo.gfx.Fill?
		//		An optional fill to use for any markers on the plot.
		markerFill:			{},
	
		// markerFont: String?
		//		An optional font definition to use for any markers on the plot.
		markerFont:			"",
	
		// markerFontColor: String|dojo.Color?
		//		An optional color to use for any marker text on the plot.
		markerFontColor:	"",
		
		// enableCache: Boolean?
		//		Whether the markers are cached from one rendering to another. This improves the rendering performance of
		//		successive rendering but penalize the first rendering.  Default false.
		enableCache: false,

		// interpolate: Boolean?
		//		Whether when there is a null data point in the data the plot interpolates it or if the lines is split at that
		//		point.	Default false.
		interpolate: false
	});
=====*/

	var purgeGroup = dfr.lambda("item.purgeGroup()");

	var DEFAULT_ANIMATION_LENGTH = 1200;	// in ms

	return declare("dojox.charting.plot2d.Default", [CartesianBase, _PlotEvents], {
		
		// defaultParams:
		//		The default parameters of this plot.
		defaultParams: {
			lines:   true,	// draw lines
			areas:   false,	// draw areas
			markers: false,	// draw markers
			tension: "",	// draw curved lines (tension is "X", "x", or "S")
			animate: false, // animate chart to place
			enableCache: false,
			interpolate: false
		},
		
		// optionalParams:
		//		The optional parameters of this plot.
		optionalParams: {
			// theme component
			stroke:		{},
			outline:	{},
			shadow:		{},
			fill:		{},
			filter:     {},
			styleFunc: null,
			font:		"",
			fontColor:	"",
			marker:             "",
			markerStroke:		{},
			markerOutline:		{},
			markerShadow:		{},
			markerFill:			{},
			markerFont:			"",
			markerFontColor:	""
		},

		constructor: function(chart, kwArgs){
			// summary:
			//		Return a new plot.
			// chart: dojox/charting/Chart
			//		The chart this plot belongs to.
			// kwArgs: dojox.charting.plot2d.__DefaultCtorArgs?
			//		An optional arguments object to help define this plot.
			this.opt = lang.clone(lang.mixin(this.opt, this.defaultParams));
			du.updateWithObject(this.opt, kwArgs);
			du.updateWithPattern(this.opt, kwArgs, this.optionalParams);
			// animation properties
			this.animate = this.opt.animate;
		},

		createPath: function(run, creator, params){
			var path;
			if(this.opt.enableCache && run._pathFreePool.length > 0){
				path = run._pathFreePool.pop();
				path.setShape(params);
				// was cleared, add it back
				creator.add(path);
			}else{
				path = creator.createPath(params);
			}
			if(this.opt.enableCache){
				run._pathUsePool.push(path);
			}
			return path;
		},

		buildSegments: function(i, indexed){
			var run = this.series[i],
				min = indexed?Math.max(0, Math.floor(this._hScaler.bounds.from - 1)):0,
				max = indexed?Math.min(run.data.length, Math.ceil(this._hScaler.bounds.to)):run.data.length,
				rseg = null, segments = [];

			// split the run data into dense segments (each containing no nulls)
			// except if interpolates is false in which case ignore null between valid data
			for(var j = min; j < max; j++){
				if(run.data[j] != null && (indexed || run.data[j].y != null)){
					if(!rseg){
						rseg = [];
						segments.push({index: j, rseg: rseg});
					}
					rseg.push((indexed && run.data[j].hasOwnProperty("y"))?run.data[j].y:run.data[j]);
				}else{
					if(!this.opt.interpolate || indexed){
						// we break the line only if not interpolating or if we have indexed data
						rseg = null;
					}
				}
			}
			return segments;
		},

		render: function(dim, offsets){
			// summary:
			//		Render/draw everything on this plot.
			// dim: Object
			//		An object of the form { width, height }
			// offsets: Object
			//		An object of the form { l, r, t, b }
			// returns: dojox/charting/plot2d/Default
			//		A reference to this plot for functional chaining.

			// make sure all the series is not modified
			if(this.zoom && !this.isDataDirty()){
				return this.performZoom(dim, offsets);
			}

			this.resetEvents();
			this.dirty = this.isDirty();
			var s;
			if(this.dirty){
				arr.forEach(this.series, purgeGroup);
				this._eventSeries = {};
				this.cleanGroup();
				this.getGroup().setTransform(null);
				s = this.getGroup();
				df.forEachRev(this.series, function(item){ item.cleanGroup(s); });
			}
			var t = this.chart.theme, stroke, outline, events = this.events();

			for(var i = this.series.length - 1; i >= 0; --i){
				var run = this.series[i];
				if(!this.dirty && !run.dirty){
					t.skip();
					this._reconnectEvents(run.name);
					continue;
				}
				run.cleanGroup();
				if(this.opt.enableCache){
					run._pathFreePool = (run._pathFreePool?run._pathFreePool:[]).concat(run._pathUsePool?run._pathUsePool:[]);
					run._pathUsePool = [];
				}
				if(!run.data.length){
					run.dirty = false;
					t.skip();
					continue;
				}

				var theme = t.next(this.opt.areas ? "area" : "line", [this.opt, run], true),
					lpoly,
					ht = this._hScaler.scaler.getTransformerFromModel(this._hScaler),
					vt = this._vScaler.scaler.getTransformerFromModel(this._vScaler),
					eventSeries = this._eventSeries[run.name] = new Array(run.data.length);

				s = run.group;
				if(run.hidden){
					if(this.opt.lines){
						run.dyn.stroke = theme.series.stroke;
					}
					if(this.opt.markers){
						run.dyn.markerFill = theme.marker.fill;
						run.dyn.markerStroke = theme.marker.stroke;
						run.dyn.marker = theme.symbol;
					}
					if(this.opt.areas){ 
						run.dyn.fill = theme.series.fill;
					}
					continue;
				}
				// optim works only for index based case
				var indexed = arr.some(run.data, function(item){
					return typeof item == "number" || (item && !item.hasOwnProperty("x"));
				});

				var rsegments = this.buildSegments(i, indexed);
				for(var seg = 0; seg < rsegments.length; seg++){
					var rsegment = rsegments[seg];
					if(indexed){
						lpoly = arr.map(rsegment.rseg, function(v, i){
							return {
								x: ht(i + rsegment.index + 1) + offsets.l,
								y: dim.height - offsets.b - vt(v),
								data: v
							};
						}, this);
					}else{
						lpoly = arr.map(rsegment.rseg, function(v){
							return {
								x: ht(v.x) + offsets.l,
								y: dim.height - offsets.b - vt(v.y),
								data: v
							};
						}, this);
					}

					// if we are indexed & we interpolate we need to put all the segments as a single one now
					if(indexed && this.opt.interpolate){
						while(seg < rsegments.length) {
							seg++;
							rsegment = rsegments[seg];
							if(rsegment){
								lpoly = lpoly.concat(arr.map(rsegment.rseg, function(v, i){
									return {
										x: ht(i + rsegment.index + 1) + offsets.l,
										y: dim.height - offsets.b - vt(v),
										data: v
									};
								}, this));
							}
						}
					} 

					var lpath = this.opt.tension ? dc.curve(lpoly, this.opt.tension) : "";

					if(this.opt.areas && lpoly.length > 1){
						var fill = this._plotFill(theme.series.fill, dim, offsets), apoly = lang.clone(lpoly);
						if(this.opt.tension){
							var apath = "L" + apoly[apoly.length-1].x + "," + (dim.height - offsets.b) +
								" L" + apoly[0].x + "," + (dim.height - offsets.b) +
								" L" + apoly[0].x + "," + apoly[0].y;
							run.dyn.fill = s.createPath(lpath + " " + apath).setFill(fill).getFill();
						} else {
							apoly.push({x: lpoly[lpoly.length - 1].x, y: dim.height - offsets.b});
							apoly.push({x: lpoly[0].x, y: dim.height - offsets.b});
							apoly.push(lpoly[0]);
							run.dyn.fill = s.createPolyline(apoly).setFill(fill).getFill();
						}
					}
					if(this.opt.lines || this.opt.markers){
						// need a stroke
						stroke = theme.series.stroke;
						if(theme.series.outline){
							outline = run.dyn.outline = dc.makeStroke(theme.series.outline);
							outline.width = 2 * outline.width + stroke.width;
						}
					}
					if(this.opt.markers){
						run.dyn.marker = theme.symbol;
					}
					var frontMarkers = null, outlineMarkers = null, shadowMarkers = null;
					if(stroke && theme.series.shadow && lpoly.length > 1){
						var shadow = theme.series.shadow,
							spoly = arr.map(lpoly, function(c){
								return {x: c.x + shadow.dx, y: c.y + shadow.dy};
							});
						if(this.opt.lines){
							if(this.opt.tension){
								run.dyn.shadow = s.createPath(dc.curve(spoly, this.opt.tension)).setStroke(shadow).getStroke();
							} else {
								run.dyn.shadow = s.createPolyline(spoly).setStroke(shadow).getStroke();
							}
						}
						if(this.opt.markers && theme.marker.shadow){
							shadow = theme.marker.shadow;
							shadowMarkers = arr.map(spoly, function(c){
								return this.createPath(run, s, "M" + c.x + " " + c.y + " " + theme.symbol).
									setStroke(shadow).setFill(shadow.color);
							}, this);
						}
					}
					if(this.opt.lines && lpoly.length > 1){
						var shape;
						if(outline){
							if(this.opt.tension){
								run.dyn.outline = s.createPath(lpath).setStroke(outline).getStroke();
							} else {
								run.dyn.outline = s.createPolyline(lpoly).setStroke(outline).getStroke();
							}
						}
						if(this.opt.tension){
							run.dyn.stroke = (shape = s.createPath(lpath)).setStroke(stroke).getStroke();
						} else {
							run.dyn.stroke = (shape = s.createPolyline(lpoly)).setStroke(stroke).getStroke();
						}
						if(shape.setFilter && theme.series.filter){
							shape.setFilter(theme.series.filter);
						}
					}
					var markerBox = null;
					if(this.opt.markers){
						var markerTheme = theme; 
						frontMarkers = new Array(lpoly.length);
						outlineMarkers = new Array(lpoly.length);
						outline = null;
						if(markerTheme.marker.outline){
							outline = dc.makeStroke(markerTheme.marker.outline);
							outline.width = 2 * outline.width + (markerTheme.marker.stroke ? markerTheme.marker.stroke.width : 0);
						}
						arr.forEach(lpoly, function(c, i){
							if(this.opt.styleFunc || typeof c.data != "number"){
								var tMixin = typeof c.data != "number" ? [c.data] : [];
								if(this.opt.styleFunc){
									tMixin.push(this.opt.styleFunc(c.data));
								}
								markerTheme = t.addMixin(theme, "marker", tMixin, true);
							}else{
								markerTheme = t.post(theme, "marker");
							}
							var path = "M" + c.x + " " + c.y + " " + markerTheme.symbol;
							if(outline){
								outlineMarkers[i] = this.createPath(run, s, path).setStroke(outline);
							}
							frontMarkers[i] = this.createPath(run, s, path).setStroke(markerTheme.marker.stroke).setFill(markerTheme.marker.fill);
						}, this);
						run.dyn.markerFill = markerTheme.marker.fill;
						run.dyn.markerStroke = markerTheme.marker.stroke;
						if(!markerBox && this.opt.labels){
							markerBox = frontMarkers[0].getBoundingBox();
						}
						if(events){
							arr.forEach(frontMarkers, function(s, i){
								var o = {
									element: "marker",
									index:   i + rsegment.index,
									run:     run,
									shape:   s,
									outline: outlineMarkers[i] || null,
									shadow:  shadowMarkers && shadowMarkers[i] || null,
									cx:      lpoly[i].x,
									cy:      lpoly[i].y
								};
								if(indexed){
									o.x = i + rsegment.index + 1;
									o.y = run.data[i + rsegment.index];
								}else{
									o.x = rsegment.rseg[i].x;
									o.y = run.data[i + rsegment.index].y;
								}
								this._connectEvents(o);
								eventSeries[i + rsegment.index] = o;
							}, this);
						}else{
							delete this._eventSeries[run.name];
						}
					}
					if(this.opt.labels){
						var labelBoxW = markerBox?markerBox.width:2;
						var labelBoxH = markerBox?markerBox.height:2;
						arr.forEach(lpoly, function(c, i){
							if(this.opt.styleFunc || typeof c.data != "number"){
								var tMixin = typeof c.data != "number" ? [c.data] : [];
								if(this.opt.styleFunc){
									tMixin.push(this.opt.styleFunc(c.data));
								}
								markerTheme = t.addMixin(theme, "marker", tMixin, true);
							}else{
								markerTheme = t.post(theme, "marker");
							}
							this.createLabel(s, rsegment.rseg[i], { x: c.x - labelBoxW / 2, y: c.y - labelBoxH / 2,
								width: labelBoxW , height: labelBoxH }, markerTheme);
						}, this);
					}
				}
				run.dirty = false;
			}
			// chart mirroring starts
			if(has("dojo-bidi")){
				this._checkOrientation(this.group, dim, offsets);
			}
			// chart mirroring ends
			if(this.animate){
				// grow from the bottom
				var plotGroup = this.getGroup();
				fx.animateTransform(lang.delegate({
					shape: plotGroup,
					duration: DEFAULT_ANIMATION_LENGTH,
					transform:[
						{name:"translate", start: [0, dim.height - offsets.b], end: [0, 0]},
						{name:"scale", start: [1, 0], end:[1, 1]},
						{name:"original"}
					]
				}, this.animate)).play();
			}
			this.dirty = false;
			return this;	//	dojox/charting/plot2d/Default
		}
	});
});
