/* $This file is distributed under the terms of the license in /doc/license.txt$ */

var DataTableWidget = Class.extend({
	
	dom: {
		searchBarParentContainerClass: "searchbar",
		paginationContainerClass: "paginatedtabs",
		containerID: "main-science-areas-table-container",
		footerID: "main-science-areas-table-footer",
		firstFilterID: "first-filter",
		secondFilterID: "second-filter",
		filterOptionClass: "filter-option",
		activeFilterClass: "active-filter",
		filterInfoIconClass: "filterInfoIcon",
		
		percentMappedInfoID: "percent-mapped-info"
	},
	init: function(sciMapWidget) {
		var me = this;
		me.sciMapWidget = sciMapWidget;
		me.widgetType = "MAIN_SCIENCE_AREAS";
		me.currentSelectedFilter = SCIMAP_TYPE.SUBDISCIPLINE;
		me.subdisciplineInfo = {};
		me.disciplineInfo = {};
		me.widget = '';
		me.percentMappedDiv = $("#" + me.dom.percentMappedInfoID);
		me.tableDiv = $('<div />');
		$("#" + me.dom.containerID).append(this.tableDiv);
		
		$.each(DISCIPLINES, function(index, item) {
			var emptyScienceAreaElement = {
				publicationCount: 0,
				label: item.label		
			};
			me.disciplineInfo[index] = emptyScienceAreaElement;
		});
		
		$.each(SUBDISCIPLINES, function(index, item) {
			var emptyScienceAreaElement = {
				publicationCount: 0,
				label: item.label		
			};
			me.subdisciplineInfo[index] = emptyScienceAreaElement;
		});
	},
	loadJsonData: function(data) {
		
		var me = this;
		me.uri = data.uri;
		me.label = data.label;
		me.pubsWithNoJournals = data.pubsWithNoJournals;
		me.pubsWithInvalidJournals = data.pubsWithInvalidJournals;
		me.pubsMapped = data.pubsMapped;
		me.type = data.type;
		
		$.each(data.subdisciplineActivity, function(subdiscipline, density) {
			
			me.subdisciplineInfo[subdiscipline].publicationCount = density;
			
			var currentSubdisciplinesDiscipline = SUBDISCIPLINES[subdiscipline].discipline;
			
			if (me.disciplineInfo[currentSubdisciplinesDiscipline]) {
				
				me.disciplineInfo[currentSubdisciplinesDiscipline].publicationCount = 
					me.disciplineInfo[currentSubdisciplinesDiscipline].publicationCount + density; 
			} 
		});
		
		$(".hide-dom-on-init").show();
		me.setupView();
	},
	hasKey: function(key) {
		return (this.keyToMarkerManagers.hasOwnProperty(key));
	},
	show: function(key) {
		this.tableDiv.show();
		this.percentMappedDiv.show();
	},
	hide: function(key) {
		this.tableDiv.hide();
		this.percentMappedDiv.hide();
	},
	cleanView: function() {
		this.hide();
	},
	initView: function() {
		this.show();
		this.changeFilter(this.currentSelectedFilter);
	},
	parseIDIntoScienceTypeAreaID: function(rawID) {
		
		var type = rawID.substring(0, rawID.indexOf("-"));
		var area = rawID.substring(rawID.indexOf("-") + 1);
		
		return [type, area];
	},
	setupView: function() {
		
		var me = this;
		
		var dom = me.dom;
		var filter = $('<div class="science-areas-filter">' +
				'<span id="' + dom.firstFilterID + '" class="' + dom.filterOptionClass + ' ' + dom.activeFilterClass + '">Sub-Disciplines</span> | ' +
		    	'<span id="' + dom.secondFilterID + '" class="' + dom.filterOptionClass + '">Disciplines</span>' +
		    	'<img class="'+ dom.filterInfoIconClass +'" id="imageIconTwo" src="'+ infoIconUrl +'" alt="information icon" title="" /></div>');
		me.tableDiv.append(filter);
		createToolTip($("#imageIconTwo"), $('#toolTipTwo').html(), "topLeft");
		initFilter(dom);
		
		var table = $('<table>');
		table.attr('id', 'datatable');
		table.addClass('datatable-table');
		
		var thead = $('<thead>');
		var tr = $('<tr>');
		
		var levelOfScienceAreaTH = $('<th>');
		levelOfScienceAreaTH.html('Level of Science Area');
		
		var scienceAreasTH = $('<th>');
		scienceAreasTH.attr("id", "science-areas-th");
		if (this.currentSelectedFilter === SCIMAP_TYPE.SUBDISCIPLINE ) {
			scienceAreasTH.html('Sub-Disciplines');
		} else {
			scienceAreasTH.html('Disciplines');
		}
		
		var activityCountTH = $('<th>');
		activityCountTH.html('# of pubs.');
		activityCountTH.attr("id", "activity-count-column");

		var percentageActivityTH = $('<th>');
		percentageActivityTH.html('% activity');
		percentageActivityTH.attr("id", "percentage-activity-column");

		tr.append(levelOfScienceAreaTH);
		tr.append(scienceAreasTH);
		tr.append(activityCountTH);
		tr.append(percentageActivityTH);
		
		thead.append(tr);
		
		table.append(thead);
		
		var tbody = $('<tbody>');
		
		var rowsToInsert = [];
		var i = 0;
		
		$.each(me.disciplineInfo, function(index, item) {
			rowsToInsert[i++] = '<tr id="' + SCIMAP_TYPE.DISCIPLINE + '-' + index + '" style="color:' + DISCIPLINES[index].color + ';"><td>' + SCIMAP_TYPE.DISCIPLINE + '</td>';
			rowsToInsert[i++] = '<td>' + item.label + '</td>';
			rowsToInsert[i++] = '<td>' + item.publicationCount.toFixed(1) + '</td>';
			rowsToInsert[i++] = '<td>' + (100 * (item.publicationCount / me.pubsMapped)).toFixed(1) + '</td></tr>';
		});
		
		
		$.each(me.subdisciplineInfo, function(index, item) {
			rowsToInsert[i++] = '<tr id="' + SCIMAP_TYPE.SUBDISCIPLINE + '-' + index + '" style="color:' + DISCIPLINES[SUBDISCIPLINES[index].discipline].color + ';"><td>' + SCIMAP_TYPE.SUBDISCIPLINE + '</td>';
			rowsToInsert[i++] = '<td>' + item.label + '</td>';
			rowsToInsert[i++] = '<td>' + item.publicationCount.toFixed(1) + '</td>';
			rowsToInsert[i++] = '<td>' + (100 * (item.publicationCount / me.pubsMapped)).toFixed(1) + '</td></tr>';
		});
		
		tbody.append(rowsToInsert.join(''));

		table.append(tbody);
		me.tableDiv.append(table);
		
		table.children("tbody").children("tr").mouseenter(function() {
			
			var params = me.parseIDIntoScienceTypeAreaID($(this).attr("id"));
			me.sciMapWidget.mouseIn(params[0], params[1]);
		});
		
		table.children("tbody").children("tr").mouseleave(function() {

			var params = me.parseIDIntoScienceTypeAreaID($(this).attr("id"));
			me.sciMapWidget.mouseOut(params[0], params[1]);
		});
		
		/*
		 * GMAIL_STYLE_PAGINATION_CONTAINER_CLASS, ACTIVE_DISCIPLINE_SUBDISCIPLINE_FILTER has to be declared 
		 * for the filter & pagination to work properly.
		 * */
		GMAIL_STYLE_PAGINATION_CONTAINER_CLASS = me.dom.paginationContainerClass;
		ACTIVE_DISCIPLINE_SUBDISCIPLINE_FILTER = me.currentSelectedFilter;
		
		if($.inArray(disciplineOrSubdisciplineDataTableFilter, $.fn.dataTableExt.afnFiltering) < 0) {
			$.fn.dataTableExt.afnFiltering.push(disciplineOrSubdisciplineDataTableFilter);
		}
		
		me.widget = table.dataTable({
		    "sDom": '<"' + me.dom.searchBarParentContainerClass 
		    			+ '"f><"filterInfo"i><"' 
		    			+ me.dom.paginationContainerClass + '"p><"table-separator"><"datatablewrapper"t>',
		    "aaSorting": [
		        [2, "desc"], [1,'asc']
		    ],
		    "asStripClasses": [],
		    "aoColumns": [{ "bVisible": false, "bSearchable": false },
		                  null,
		                  null,
		                  null], 
		    "iDisplayLength": 13,
		    "bInfo": true,
		    "oLanguage": {
				"sInfo": "_START_ - _END_ of _TOTAL_",
				"sInfoEmpty": "No matching science areas found",
				"sInfoFiltered": ""
			},
		    "sPaginationType": "gmail_style",
		    "fnDrawCallback": function () {
		    	
		        /* We check whether max number of allowed comparisions (currently 10) is reached
		         * here as well becasue the only function that is guaranteed to be called during 
		         * page navigation is this. No need to bind it to the nav-buttons becuase 1. It is over-ridden
		         * by built-in navigation events & this is much cleaner.
		         * */
//		        checkIfColorLimitIsReached();
		    }
		});
		
		
		var searchInputBox = $("." + me.dom.searchBarParentContainerClass).find("input[type=text]");
		searchInputBox.css("width", "140px");
		searchInputBox.after("<span id='reset-search' title='Clear search query'>X</span>" 
								+ "<img class='filterInfoIcon' id='searchInfoIcon' src='" + infoIconUrl + "' alt='information icon' title='' />");
		$("#reset-search").live('click', function() {
			me.widget.fnFilter("");
		});
		createToolTip($("#searchInfoIcon"), $('#searchInfoTooltipText').html(), "topLeft");
		
		var csvButton = '<hr class="subtle-hr"/><div id="main-science-areas-table-footer"><a id="csv" href="' +
						entityMapOfScienceSubDisciplineCSVURL + 
						'" class="map-of-science-links">Save All as CSV</a></div>';
		this.tableDiv.append(csvButton);
		
		var totalPublications = me.pubsWithNoJournals + me.pubsWithInvalidJournals + me.pubsMapped;
		$("#mapped-publications").text(addCommasToNumber(me.pubsMapped));
		$("#percent-mapped").text((100 * me.pubsMapped / totalPublications).toFixed(2));
		$("#total-publications").text(addCommasToNumber(totalPublications));
		
	},
	changeFilter: function(filterType) {
		var me = this;
		if (filterType === SCIMAP_TYPE.SUBDISCIPLINE) {
			
			$("#science-areas-th").html("Sub-Disciplines");
			if (me.widget) {
				me.widget.fnSettings()._iDisplayLength = 10;
			}
			me.currentSelectedFilter = SCIMAP_TYPE.SUBDISCIPLINE;
			$("a#csv").attr("href", entityMapOfScienceSubDisciplineCSVURL);
			
		} else {
			
			$("#science-areas-th").html("Disciplines");
			me.currentSelectedFilter = SCIMAP_TYPE.DISCIPLINE;
			if (me.widget) {
				me.widget.fnSettings()._iDisplayLength = 13;
			}
			$("a#csv").attr("href", entityMapOfScienceDisciplineCSVURL);
			
		}
		
		ACTIVE_DISCIPLINE_SUBDISCIPLINE_FILTER = me.currentSelectedFilter;

		if (me.widget) {
			me.widget.fnDraw();
		}
	}
});