/*global define */
define(['jquery', 'underscore', 'backbone', 'd3', 'LineChart', 'BarChart', 'DonutChart', 'CircleBadge', 'text!templates/profile.html', 'text!templates/alert.html', 'text!templates/loading.html'], 				
	function($, _, Backbone, d3, LineChart, BarChart, DonutChart, CircleBadge, profileTemplate, AlertTemplate, LoadingTemplate) {
	'use strict';
			
	var StatsView = Backbone.View.extend({

		el: '#Content',
		
		template: _.template(profileTemplate),
		
		alertTemplate: _.template(AlertTemplate),
		
		loadingTemplate: _.template(LoadingTemplate),
						
		initialize: function(options){
			if(!options) options = {};
			
			this.title = (typeof options.title === "undefined") ? "Summary of Holdings" : options.title;
			this.description = (typeof options.description === "undefined") ? 
					"A summary of all datasets in our catalog." : options.description;
			if(typeof options.el === "undefined")
				this.el = options.el;
		},
				
		render: function () {
			
			//Clear the page 
			this.$el.html("");
			
			//Only trigger the functions that draw SVG charts if d3 loaded correctly
			if(d3){
				//this.listenTo(statsModel, 'change:dataUploadDates',       this.drawUploadChart);
				this.listenTo(statsModel, 'change:temporalCoverage',      this.drawCoverageChart);				
				this.listenTo(statsModel, 'change:metadataDownloadDates', this.drawDownloadsChart);
				this.listenTo(statsModel, 'change:dataDownloadDates',     this.drawDownloadsChart);
				this.listenTo(statsModel, 'change:downloadDates',         this.drawDownloadsChart);
				this.listenTo(statsModel, "change:dataUpdateDates",       this.drawUpdatesChart);
				this.listenTo(statsModel, "change:totalSize",             this.drawTotalSize);	
				this.listenTo(statsModel, 'change:metadataCount', 	  this.drawTotalCount);			
				this.listenTo(statsModel, 'change:dataFormatIDs', 	  this.drawDataCountChart);
				this.listenTo(statsModel, 'change:metadataFormatIDs', this.drawMetadataCountChart);
			
				//this.listenTo(statsModel, 'change:dataUploads', 	  this.drawUploadTitle);
			}
			
			this.listenTo(statsModel, 'change:downloads', 	      this.drawDownloadTitle);
			this.listenTo(statsModel, 'change:lastEndDate',	  	  this.drawCoverageChartTitle);
			
			// mdq
			this.listenTo(statsModel, 'change:mdqStats',	  	  this.drawMdqStats);

			// set the header type
			appModel.set('headerType', 'default');
			
			//Insert the template
			this.$el.html(this.template({
				query: statsModel.get('query'),
				title: this.title,
				description: this.description
			}));
			
			//Insert the loading template into the space where the charts will go
			if(d3){
				this.$(".chart").html(this.loadingTemplate);
				this.$(".show-loading").html(this.loadingTemplate);
			}
			//If SVG isn't supported, insert an info warning
			else{
				this.$el.prepend(this.alertTemplate({
					classes: "alert-info",
					msg: "Please upgrade your browser or use a different browser to view graphs of these statistics.",
					email: false
				}));
			}
			
			if(!statsModel.get("supportDownloads"))
				this.$(".stripe.downloads").remove();
			
			//Start retrieving data from Solr
			statsModel.getAll();
		
			return this;
		},
		
		drawDataCountChart: function(){
			var dataCount = statsModel.get('dataCount');
			var data = statsModel.get('dataFormatIDs');

			if(dataCount){
				var svgClass = "data";
			}
			else if(!statsModel.get('dataCount') && statsModel.get('metadataCount')){	//Are we drawing a blank chart (i.e. 0 data objects found)?
				var svgClass = "data default";
			}
			else if(!statsModel.get('metadataCount') && !statsModel.get('dataCount'))
				var svgClass = "data no-activity";
			
			//If d3 isn't supported in this browser or didn't load correctly, insert a text title instead
			if(!d3){
				this.$('.format-charts-data').html("<h2 class='" + svgClass + " fallback'>" + appView.commaSeparateNumber(dataCount) + " data files</h2>");
				
				return;
			}
			
			//Draw a donut chart
			var donut = new DonutChart({
							id: "data-chart",
							data: data, 
							total: statsModel.get('dataCount'),
							titleText: "data files", 
							titleCount: dataCount,
							svgClass: svgClass,
							countClass: "data",
							height: 300,
							formatLabel: function(name){
								//If this is the application/vnd.ms-excel formatID - let's just display "MS Excel"
								if((name !== undefined) && (name.indexOf("ms-excel") > -1)) name = "MS Excel";
								else if((name != undefined) && (name == "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet")) name= "MS Excel OpenXML"
								else if((name != undefined) && (name == "application/vnd.openxmlformats-officedocument.wordprocessingml.document")) name= "MS Word OpenXML"
								//Application/octet-stream - shorten it
								else if((name !== undefined) && (name == "application/octet-stream")) name = "Application file";
								
								if(name === undefined) name = "";
								
								return name;
							}
						});
			this.$('.format-charts-data').html(donut.render().el);
		},

		drawMetadataCountChart: function(){
			var metadataCount = statsModel.get("metadataCount");
			var data = statsModel.get('metadataFormatIDs');	
			
			if(metadataCount){
				var svgClass = "metadata";
			}
			else if(!statsModel.get('metadataCount') && statsModel.get('dataCount')){	//Are we drawing a blank chart (i.e. 0 data objects found)?
				var svgClass = "metadata default";
			}
			else if(!statsModel.get('metadataCount') && !statsModel.get('dataCount'))
				var svgClass = "metadata no-activity";
			
			//If d3 isn't supported in this browser or didn't load correctly, insert a text title instead
			if(!d3){
				this.$('.format-charts-metadata').html("<h2 class='" + svgClass + " fallback'>" + appView.commaSeparateNumber(metadataCount) + " metadata files</h2>");
				
				return;
			}
			
			//Draw a donut chart
			var donut = new DonutChart({
							id: "metadata-chart",
							data: data,
							total: statsModel.get('metadataCount'),
							titleText: "metadata files", 
							titleCount: metadataCount,
							svgClass: svgClass,
							countClass: "metadata",
							height: 300,
							formatLabel: function(name){
								if((name !== undefined) && (name.indexOf("//ecoinformatics.org") > -1)){
									//EML - extract the version only
									if(name.substring(0,4) == "eml:") name = name.substr(name.lastIndexOf("/")+1).toUpperCase().replace('-', ' ');
									
									//EML modules
									if(name.indexOf("-//ecoinformatics.org//eml-") > -1) name = "EML " + name.substring(name.indexOf("//eml-")+6, name.lastIndexOf("-")) + " " + name.substr(name.lastIndexOf("-")+1, 5);							
									
								}
								//Dryad - shorten it
								else if((name !== undefined) && (name == "http://datadryad.org/profile/v3.1")) name = "Dryad 3.1";
								//FGDC - just display "FGDC {year}"
								else if((name !== undefined) && (name.indexOf("FGDC") > -1)) name = "FGDC " + name.substring(name.length-4);
								
								if(name === undefined) name = "";
								return name;
							}
						});
			
			this.$('.format-charts-metadata').html(donut.render().el); 
		},
		
		drawFirstUpload: function(){
			
			var className = "";
			
			if( !statsModel.get("firstUpload") ){
				var chartData = [{ 
				              	  count: "N/A", 
				              	  className: "packages no-activity"
	                			}];
			}
			else{
				var firstUpload = new Date(statsModel.get("firstUpload")),
					readableDate = firstUpload.toDateString();
			
				readableDate = readableDate.substring(readableDate.indexOf(" ") + 1);
			
				var chartData = [{ 
				              	  count: readableDate, 
				              	  className: "packages"
	                			}];	
			}
			
			//Create the circle badge
			var dateBadge = new CircleBadge({
				id: "first-upload-badge",
				data: chartData,
				title: "first upload",
				titlePlacement: "inside",
				useGlobalR: true,
				globalR: 100
			});			
			
			this.$("#first-upload").html(dateBadge.render().el);
		},
		
		//drawUploadChart will get the upload stats from the stats model and draw a time series cumulative chart
		drawUploadChart: function(){
			//Get the width of the chart by using the parent container width
			var parentEl = this.$('.upload-chart');
			var width = parentEl.width() || null;
			
			//If there was no first upload, draw a blank chart and exit
			if(!statsModel.get('firstUpload')){
				
				var lineChartView = new LineChart(
						{	  id: "upload-chart",
						 	yLabel: "files uploaded",
						 frequency: 0,
						 	 width: width
						});
				
				this.$('.upload-chart').html(lineChartView.render().el);
					
				return;
			}
				
			//Set the frequency of our points
			var frequency = 12;
									
			//Check which line we should draw first since the scale will be based off the first line
			if(statsModel.get("metadataUploads") > statsModel.get("dataUploads") ){
				
				//If there isn't a lot of point to graph, draw points more frequently on the line
				if(statsModel.get("metadataUploadDates").length < 40) frequency = 1;
				
				//Create the line chart and draw the metadata line
				var lineChartView = new LineChart(
						{	  data: statsModel.get('metadataUploadDates'),
			  formatFromSolrFacets: true,
						cumulative: true,
								id: "upload-chart",
						 className: "metadata",
						 	yLabel: "files uploaded",
						labelValue: "Metadata: ",
						// frequency: frequency, 
							radius: 2,
							width: width,
						    labelDate: "M-y"
						});
				
				this.$('.upload-chart').html(lineChartView.render().el);
			
				//Only draw the data file line if there was at least one uploaded
				if(statsModel.get("dataUploads")){
					//Add a line to our chart for data uploads
					lineChartView.className = "data";
					lineChartView.labelValue ="Data: ";
					lineChartView.addLine(statsModel.get('dataUploadDates'));
				}
			}
			else{
					var lineChartView = new LineChart(
							{	  data: statsModel.get('dataUploadDates'),
				  formatFromSolrFacets: true,
							cumulative: true,
									id: "upload-chart",
							 className: "data",
							 	yLabel: "files uploaded",
							labelValue: "Data: ",
						//	 frequency: frequency, 
								radius: 2,
								 width: width,
						    labelDate: "M-y"
							 });
					
					this.$('.upload-chart').html(lineChartView.render().el);

					//If no metadata files were uploaded, we don't want to draw the data file line
					if(statsModel.get("metadataUploads")){
						//Add a line to our chart for metadata uploads
						lineChartView.className = "metadata";
						lineChartView.labelValue = "Metadata: ";
						lineChartView.addLine(statsModel.get('metadataUploadDates'));
					}
				}
		},
		
		//drawUploadTitle will draw a circle badge title for the uploads time series chart
		drawUploadTitle: function(){
			
			//If d3 isn't supported in this browser or didn't load correctly, insert a text title instead
			if(!d3){
				this.$('#uploads-title').html("<h2 class='packages fallback'>" + appView.commaSeparateNumber(statsModel.get('totalUploads')) + "</h2>");
				
				return;
			}
			
			if(!statsModel.get('dataUploads') && !statsModel.get('metadataUploads')){
				//Draw the upload chart title
				var uploadChartTitle = new CircleBadge({
					id: "upload-chart-title",
					className: "no-activity",
					globalR: 60,
					data: [{ count: 0, label: "uploads" }]
				});
				
				this.$('#uploads-title').prepend(uploadChartTitle.render().el);
				
				return;
			}
			
			//Get information for our upload chart title
			var titleChartData = [],
				metadataUploads = statsModel.get("metadataUploads"),
				dataUploads = statsModel.get("dataUploads"),
				metadataClass = "metadata",
				dataClass = "data";						
			
			if(metadataUploads == 0) metadataClass = "default";
			if(dataUploads == 0) dataClass = "default";
			
			
			var titleChartData = [
			                      {count: statsModel.get("metadataUploads"), label: "metadata", className: metadataClass},
							      {count: statsModel.get("dataUploads"), 	  label: "data", 	 className: dataClass}
								 ];
			
			//Draw the upload chart title
			var uploadChartTitle = new CircleBadge({
				id: "upload-chart-title",
				data: titleChartData,
				className: "chart-title",
				useGlobalR: true,
				globalR: 60
			});
			this.$('#uploads-title').prepend(uploadChartTitle.render().el);
		},
		
		/*
		 * drawTotalCount - draws a simple count of total metadata files/datasets
		 */
		drawTotalCount: function(){
			
			var className = "";
			
			if( !statsModel.get("metadataCount") && !statsModel.get("dataCount") )
				className += " no-activity";
			
			var chartData = [{ 
	                    	  count: statsModel.get("metadataCount"), 
	                    	  className: "packages" + className
			                }];
			
			//Create the circle badge
			var countBadge = new CircleBadge({
				id: "total-datasets-title",
				data: chartData,
				title: "datasets",
				titlePlacement: "inside",
				useGlobalR: true,
				globalR: 100,
				height: 220
			});
			
			this.$('#total-datasets').prepend(countBadge.render().el);
		},
		
		/*
		 * drawTotalSize draws a CircleBadgeView with the total file size of 
		 * all current metadata and data files
		 */
		drawTotalSize: function(){
			
			if( !statsModel.get("totalSize") ){
				var chartData = [{ 
              	  				  count: "0 bytes", 
				              	  className: "packages no-activity"
	                			}];
	
			}
			else{				
				var chartData = [{ 
		                    	  count: this.bytesToSize( statsModel.get("totalSize") ), 
		                    	  className: "packages"
				                }];				
			}
			
			//Create the circle badge
			var sizeBadge = new CircleBadge({
				id: "total-size-title",
				data: chartData,
				title: "of content",
				titlePlacement: "inside",
				useGlobalR: true,
				globalR: 100,
				height: 220
			});
			
			this.$('#total-size').prepend(sizeBadge.render().el);
		},
		
		/*
		 * drawUpdatesChart - draws a line chart representing the latest updates over time
		 */
		drawUpdatesChart: function(){
			
			//If there was no first upload, draw a blank chart and exit
			if(!statsModel.get('firstUpdate')){
				
				var lineChartView = new LineChart(
						{	  id: "updates-chart",
						 	yLabel: "files updated",
						 frequency: 0,
						 cumulative: false,
						 	 width: this.$('.metadata-updates-chart').width()
						});
				
				this.$('.metadata-updates-chart').html(lineChartView.render().el);
					
				return;
			}
				
			//Set the frequency of our points
			var frequency = 12;
													
			//If there isn't a lot of points to graph, draw points more frequently on the line
			if(statsModel.get("metadataUpdateDates").length < 40) frequency = 1;
			
			//Create the line chart for metadata updates
			var metadataLineChart = new LineChart(
					{	  data: statsModel.get('metadataUpdateDates'),
		  formatFromSolrFacets: true,
					cumulative: false,
							id: "updates-chart",
					 className: "metadata",
					 	yLabel: "metadata files updated",
					// frequency: frequency, 
						radius: 2,
						width: this.$('.metadata-updates-chart').width(),
					    labelDate: "M-y"
					});
			
			this.$('.metadata-updates-chart').html(metadataLineChart.render().el);

			//Only draw the data updates chart if there was at least one uploaded
			if(statsModel.get("dataCount")){
				//Create the line chart for data updates
				var dataLineChart = new LineChart(
						{	  data: statsModel.get('dataUpdateDates'),
			  formatFromSolrFacets: true,
						cumulative: false,
								id: "updates-chart",
						 className: "data",
						 	yLabel: "data files updated",
						// frequency: frequency, 
							radius: 2,
							width: this.$('.data-updates-chart').width(),
						    labelDate: "M-y"
						});
				
				this.$('.data-updates-chart').html(dataLineChart.render().el);
			
				//Add a line to our chart for data uploads
				//lineChartView.className = "data";
			//	lineChartView.labelValue ="Data: ";
				//lineChartView.addLine(statsModel.get('dataUpdateDates'));
			}
			
		},
		
		/*
		 * drawDownloadsChart - draws a line chart representing the downloads over time
		 */
		drawDownloadsChart: function(){
			//Only draw the chart once both metadata and data dates have been retrieved
			//if(!statsModel.get("metadataDownloadDates") || !statsModel.get("dataDownloadDates")) return;
			
			if(!statsModel.get("downloadDates")) return;
				
			//Get the width of the chart by using the parent container width
			var parentEl = this.$('.download-chart');
			var width = parentEl.width() || null;
			
			//If there are no download stats, show a message and exit
			if(!statsModel.get('downloads')){
				
				var msg = "No one has downloaded any of this data or download statistics are not being reported";
				parentEl.html("<p class='subtle center'>" + msg + ".</p>");
									
				return;
			}
			
			//Set the frequency of our points
			var frequency = 6;
									
			//Check which line we should draw first since the scale will be based off the first line
			
			var options = {
					data: statsModel.get('downloadDates'),
					formatFromSolrFacetRanges: true,
					id: "download-chart",
					yLabel: "all downloads",
					barClass: "packages",
					roundedRect: true,
					roundedRadius: 10,
					barLabelClass: "packages",
					width: width
				};
		
			var barChart = new BarChart(options);
			parentEl.html(barChart.render().el);
				
		},
		
		//drawDownloadTitle will draw a circle badge title for the downloads time series chart
		drawDownloadTitle: function(){
			
			//If d3 isn't supported in this browser or didn't load correctly, insert a text title instead
			if(!d3){
				this.$('#downloads-title').html("<h2 class='packages fallback'>" + appView.commaSeparateNumber(statsModel.get('downloads')) + "</h2>");
				
				return;
			}
			
			//If there are 0 downloads, draw a default/blank chart title
			if(!statsModel.get('downloads')){
				var downloadChartTitle = new CircleBadge({
					id: "download-chart-title",
					className: statsModel.get("totalUploads") ? "default" : "no-activity",
					globalR: 60,
					data: [{ count: 0, label: "downloads" }]
				});
				
				this.$('#downloads-title').html(downloadChartTitle.render().el);
				
				this.listenToOnce(statsModel, "change:totalUploads", this.drawDownloadTitle);
				
				return;
			}
			
			//Get information for our download chart title
			var titleChartData = [],
				metadataDownloads = statsModel.get("metadataDownloads"),
				dataDownloads = statsModel.get("dataDownloads"),
				metadataClass = "metadata",
				dataClass = "data";						
			
			if(metadataDownloads == 0) metadataClass = "default";
			if(dataDownloads == 0) dataClass = "default";
			
			
			var titleChartData = [
			                      {count: statsModel.get("metadataDownloads"), label: "metadata", className: metadataClass},
							      {count: statsModel.get("dataDownloads"), 	   label: "data", 	  className: dataClass}
								 ];
			
			//Draw the download chart title
			var downloadChartTitle = new CircleBadge({
				id: "download-chart-title",
				data: titleChartData,
				className: "chart-title",
				useGlobalR: true,
				globalR: 60
			});
			
			this.$('#downloads-title').html(downloadChartTitle.render().el);
		},
		
		//Draw a bar chart for the temporal coverage 
		drawCoverageChart: function(e, data){
			
			//Get the width of the chart by using the parent container width
			var parentEl = this.$('.temporal-coverage-chart');
			var width = parentEl.width() || null;
			
			// If results were found but none have temporal coverage, draw a default chart
			if(!statsModel.get('firstBeginDate')){
								
				parentEl.html("<p class='subtle center'>There are no metadata documents that describe temporal coverage.</p>");
									
				return;
			}
			
				var options = {
						data: data,
						formatFromSolrFacets: true,
						id: "temporal-coverage-chart",
						yLabel: "data packages",
						yFormat: d3.format(",d"),
						barClass: "packages",
						roundedRect: true,
						roundedRadius: 10,
						barLabelClass: "packages",
						width: width
					};
			
			var barChart = new BarChart(options);
			parentEl.html(barChart.render().el);
			
		},
		
		drawCoverageChartTitle: function(){
			if((!statsModel.get('firstBeginDate')) || (!statsModel.get('lastEndDate'))) return;
			
			//Create the range query
			var yearRange = statsModel.get('firstBeginDate').getUTCFullYear() + " - " + statsModel.get('lastEndDate').getUTCFullYear();
			
			//Find the year range element
			this.$('#data-coverage-year-range').text(yearRange);
		},
		
		drawMdqStats: function() {
			if (!statsModel.get("mdqStats")) {
				return;
			}
			if (!statsModel.get("mdqStatsTotal")) {
				return;
			}
			var mdqCompositeStats= statsModel.get("mdqStats").mdq_composite_d;
			
			var mdqTotalStats = statsModel.get("mdqStatsTotal").mdq_composite_d;
			
			if (mdqTotalStats && mdqTotalStats.mean && mdqCompositeStats && mdqCompositeStats.mean) {
				var diff = mdqCompositeStats.mean - mdqTotalStats.mean;
				var repoAvg = (mdqTotalStats.mean*100).toFixed(0) + "%";
				
				if (diff < 0) {
					$("#mdq-percentile-container").text("Below repository average");
					$("#mdq-percentile-icon").addClass("icon-thumbs-down");
				}
				if (diff > 0) {
					$("#mdq-percentile-container").text("Above repository average");
					$("#mdq-percentile-icon").addClass("icon-thumbs-up");
				}
				if (diff == 0) {
					$("#mdq-percentile-container").text("At repository average");
					$("#mdq-percentile-icon").addClass("icon-star");
				}
				
				// for the box plot
				// top arrow for this view
				$("#mdq-score-num").text((mdqCompositeStats.mean*100).toFixed(0) + "%");
				$("#mdq-score").css(
				{
					  "margin-left": (mdqCompositeStats.mean*100).toFixed(0) + "%"
				});
				// the range
				$("#mdq-box").css(
				{
					"width": ((mdqCompositeStats.max - mdqCompositeStats.min) * 100).toFixed(0) + "%",
					"margin-left": (mdqCompositeStats.min*100).toFixed(0) + "%"
				});
				$("#mdq-box").attr("data-content", mdqCompositeStats.count + " scores range from " + (mdqCompositeStats.min*100).toFixed(0) + "%" + " to " + (mdqCompositeStats.max*100).toFixed(0) + "%");
				// the bottom arrow for repo
				$("#mdq-repo-score-num").text((mdqTotalStats.mean*100).toFixed(0) + "%");
				$("#mdq-repo-score").css(
				{
					  "margin-left": (mdqTotalStats.mean*100).toFixed(0) + "%"
				});
	
			}
			
			// now draw the chart
			this.drawMdqFacets();

		},
		
		drawMdqFacets: function() {
			
			var mdqCompositeStats= statsModel.get("mdqStats").mdq_composite_d;
			
			if (mdqCompositeStats) {
				// keys are the facet values, values are the stats (min, max, mean, etc...)
				var datasourceFacets = mdqCompositeStats.facets.mdq_metadata_datasource_s || {};
				var formatIdFacets = mdqCompositeStats.facets.mdq_metadata_formatId_s || {};
				var rightsHolderFacets = mdqCompositeStats.facets.mdq_metadata_rightsHolder_s || {};
				var suiteIdFacets = mdqCompositeStats.facets.mdq_suiteId_s || {};
				var funderFacets = mdqCompositeStats.facets.mdq_metadata_funder_sm || {};
				var groupFacets = mdqCompositeStats.facets.mdq_metadata_group_sm || {};
							
				if(!Object.keys(datasourceFacets).length && 
						!Object.keys(formatIdFacets).length &&
						!Object.keys(rightsHolderFacets).length &&
						!Object.keys(suiteIdFacets).length &&
						!Object.keys(funderFacets).length &&
						!Object.keys(groupFacets).length)
					return;
					
				//this.drawMdqChart(datasourceFacets);
				//this.drawMdqChart(rightsHolderFacets);
				this.drawMdqChart(_.extend(formatIdFacets, datasourceFacets, suiteIdFacets, funderFacets, groupFacets));

				//Unhide the quality chart
				$("#quality-chart").show();
			}
		},
		
		//Draw a bar chart for the slice
		drawMdqChart: function(data){
			
			//Get the width of the chart by using the parent container width
			var parentEl = this.$('.mdq-chart');
			var width = parentEl.width() || null;			
			
			var options = {
					data: data,
					formatFromSolrFacets: true,
					solrFacetField: "mean",
					id: "mdq-slice-chart",
					yLabel: "mean score",
					yFormat: d3.format(",%"),
					barClass: "packages",
					roundedRect: true,
					roundedRadius: 10,
					barLabelClass: "packages",
					width: width
				};
			
			var barChart = new BarChart(options);
			parentEl.html(barChart.render().el);
			
		},
		
		/**
		 * Convert number of bytes into human readable format
		 *
		 * @param integer bytes     Number of bytes to convert
		 * @param integer precision Number of digits after the decimal separator
		 * @return string
		 */
		bytesToSize: function(bytes, precision){
		    var kilobyte = 1024;
		    var megabyte = kilobyte * 1024;
		    var gigabyte = megabyte * 1024;
		    var terabyte = gigabyte * 1024;

		    if(typeof bytes === "undefined") var bytes = this.get("size");

		    if ((bytes >= 0) && (bytes < kilobyte)) {
		        return bytes + ' B';

		    } else if ((bytes >= kilobyte) && (bytes < megabyte)) {
		        return (bytes / kilobyte).toFixed(precision) + ' KB';

		    } else if ((bytes >= megabyte) && (bytes < gigabyte)) {
		        return (bytes / megabyte).toFixed(precision) + ' MB';

		    } else if ((bytes >= gigabyte) && (bytes < terabyte)) {
		        return (bytes / gigabyte).toFixed(precision) + ' GB';

		    } else if (bytes >= terabyte) {
		        return (bytes / terabyte).toFixed(precision) + ' TB';

		    } else {
		        return bytes + ' B';
		    }
		},
		
		onClose: function () {			
			//Clear the template
			this.$el.html("");
			
			//Stop listening to changes in the model
			this.stopListening(statsModel);			
			
			//Reset the stats model
			statsModel.clear().set(statsModel.defaults);
		}
		
	});
	
	return StatsView;		
});
