/*******************************************************************************
 * Copyright (c) 2012-2013 University of Stuttgart.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and the Apache License 2.0 which both accompany this distribution,
 * and are available at http://www.eclipse.org/legal/epl-v10.html
 * and http://www.apache.org/licenses/LICENSE-2.0
 *
 * Contributors:
 *    Oliver Kopp - initial API and implementation and/or initial documentation
 *******************************************************************************/

/* no name given as RequireJS' documentatio says that makes modules less portable */
define(["datatables"], function() {
		/*
		* Valid chars: See
		* <ul>
		* <li>http://www.w3.org/TR/REC-xml-names/#NT-NCName</li>
		* <li>http://www.w3.org/TR/REC-xml/#NT-Name</li>
		* </ul>
		*/
		// NameCharRange \u10000-\ueffff is not supported by Java
		var NCNameStartChar_RegExp = "[A-Z_a-z\u00c0-\u00d6\u00d8\u00f6\u00f8\u02ff\u0370\u037d\u037f-\u1fff\u200c-\u200d\u2070-\u218f\u2c00-\u2fef\u3001-\ud7ff\uf900-\ufdcf\ufdf0-\ufffd]";
		var NCNameChar_RegExp = NCNameStartChar_RegExp + "|[-\\.0-9\u00B7\u0300-\u036F\u203F-\u2040]";
		var NCName_RegExp = NCNameStartChar_RegExp + "(" + NCNameChar_RegExp + ")*";
		var QName_RegExp = "(" + NCName_RegExp + ":)?(" + NCName_RegExp + ")";

		var NCNameStartChar_Pattern = new RegExp(NCNameStartChar_RegExp);
		var NCNameChar_Pattern = new RegExp(NCNameChar_RegExp);

		/**
		 * Initializes a table (and updates tableInfo)
		 *  * adds selection capability
		 *
		 * @param info.id: id of the table  (with #)
		 * @param paramsForDataTable: additional parameters for dataTable()
		 * @param afterInit function to be called after dataTables object initalization happened
		 *
		 * @returns initialized info object
		 *   * info.table is updated with a pointer to the data table
		 *   * info.selectedTr is set to null
		 */
		function initTable(info, paramsForDataTable, afterInit) {
			paramsForDataTable = paramsForDataTable || {};

			$(info.id).click(function(event) {
				if (info.selectedTr != null) {
					info.selectedTr.removeClass('row_selected');
				}
				var row = $(event.target.parentNode);
				if ((info.selectedTr != null) && (info.selectedTr[0] == row[0])) {
					// row is deselected if selected again
					info.selectedRow = null;
					info.selectedTr = null;
				} else {
					info.selectedTr = row;
					info.selectedTr.addClass('row_selected');
					info.selectedRow = event.target.parentNode;
				}
			});
			info.selectedTr = null;
			info.table = $(info.id).dataTable(paramsForDataTable);
			if (afterInit) afterInit();
		}

		/**
		 * Function to determine whether a data table described with the tableInfo object is empty
		 *
		 * @param tableInfo the table info object describing the table
		 * @returns true if the table is empty, false otherwise
		 */
		function isEmptyTable(tableInfo) {
			return tableInfo.table.children("tbody").children("tr").first().children("td").hasClass("dataTables_empty");
		}

		/**
		 * JavaScript implementation of org.eclipse.winery.common.Util.makeNCName(String)
		 */
		function makeNCName(text) {
			if (!text || text == "") {
				return text;
			}

			var res = "";

			var start = text.substr(0, 1);
			if (NCNameStartChar_Pattern.test(start)) {
				res += start;
			} else {
				res += "_";
			}

			for (var i=1; i<text.length; i++) {
				var c = (text.substr(i, 1));
				if (NCNameChar_Pattern.test(c)) {
					res += c;
				} else {
					res += "_";
				}
			}
			return res;
		}

		var module = {
			initTable: initTable,
			isEmptyTable: isEmptyTable,
			makeNCName: makeNCName,
			QName_RegExp: QName_RegExp
		};
		return module;
	}
);