/*
* TimeplotLoader.js
*
* Copyright (c) 2012, Stefan Jänicke. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301  USA
*/

/**
 * Timeplot Script Loader
 * @author Stefan Jänicke (stjaenicke@informatik.uni-leipzig.de)
 * @release 1.0
 * @release date: 2012-07-27
 * @version date: 2012-07-27
 */
TimeplotLoader = {

	load : function(urlPrefix, callback) {

		JQuery_urlPrefix = urlPrefix + 'jquery/';
		SimileAjax_urlPrefix = urlPrefix + 'simile/ajax/';
		Timeline_urlPrefix = urlPrefix + 'simile/timeline/';
		Timeplot_urlPrefix = urlPrefix + 'simile/timeplot/';
		TimeplotLoader.callback = callback;
		TimeplotLoader.loadSimileAjax();

	},

	loadSimileAjax : function() {

		if ( typeof window.SimileAjax == "undefined") {
			window.SimileAjax = {
				loadingScriptsCount : 0,
				error : null,
				params : {
					bundle : "true"
				}
			};
			SimileAjax.Platform = new Object();
			SimileAjax.includeCssFile = function(doc, url) {
				var link = doc.createElement("link");
				link.setAttribute("rel", "stylesheet");
				link.setAttribute("type", "text/css");
				link.setAttribute("href", url);
				doc.getElementsByTagName("head")[0].appendChild(link);
			};
			SimileAjax.urlPrefix = SimileAjax_urlPrefix;
			var jsFiles = [{
				url : SimileAjax.urlPrefix + "simile-ajax-bundle.js",
				test : "SimileAjax.XmlHttp._forceXML"
			}];
			(new DynaJsLoader()).loadScripts(jsFiles, TimeplotLoader.loadTimeline);
			SimileAjax.includeCssFile(document, SimileAjax.urlPrefix + "styles/" + "graphics.css");
		} else {
			TimeplotLoader.loadTimeline();
		}

	},

	loadTimeline : function() {

		SimileAjax.History.enabled = false;

		if ( typeof window.Timeline == "undefined") {
			window.Timeline = new Object();
			Timeline.urlPrefix = Timeline_urlPrefix;
			window.Timeline.DateTime = window.SimileAjax.DateTime;
			// for backward compatibility
			var jsFiles = [{
				url : Timeline.urlPrefix + "timeline-bundle.js",
				test : "Timeline.NativeDateUnit.change"
			}, {
				url : Timeline.urlPrefix + "scripts/l10n/en/" + "timeline.js"
			}, {
				url : Timeline.urlPrefix + "scripts/l10n/en/" + "labellers.js"
			}];
			(new DynaJsLoader()).loadScripts(jsFiles, TimeplotLoader.loadTimeplot);
			SimileAjax.includeCssFile(document, Timeline.urlPrefix + "timeline-bundle.css");
		} else {
			TimeplotLoader.loadTimeplot();
		}

	},

	loadTimeplot : function() {

		if ( typeof window.Timeplot == "undefined") {
			window.Timeplot = {
				params : {
					bundle : true,
					autoCreate : true
				},
				namespace : "http://simile.mit.edu/2007/06/timeplot#",
				importers : {}
			};
			Timeplot.urlPrefix = Timeplot_urlPrefix;
			var jsFiles = [];
			var canvas = document.createElement("canvas");
			if (!canvas.getContext) {
				jsFiles.push({
					url : Timeplot.urlPrefix + "lib/excanvas.js",
					test : canvas.getContext
				});
			}
			jsFiles.push({
				url : Timeplot.urlPrefix + "timeplot-bundle.js",
				test : "Timeplot.Processor.prototype.removeListener"
			});
			(new DynaJsLoader()).loadScripts(jsFiles, TimeplotLoader.callback);
			SimileAjax.includeCssFile(document, Timeplot.urlPrefix + "timeplot-bundle.css");
		} else if (callback) {
			callback();
		}

	}
};