var tableRawSize = 5;
var annotations = [];
var algorithms = [];
var languages = [];
var publicLink = null;
var pageGreen = "#4CAF50";
var pageGray = "#A0A0A0";
var savedAnnotations = "";
var jsonContent = null;
var named = null;
var resultText = "";
var hexLetters = '0123456789ABCDEF';
var txtFlag = true;
var checkedAnnotation = "";
var algIndexedArray = [];
var computedLanguage = "";
var dataMiner = "";
var appRoot = "/nlphub";

// ------------------------------------------------------------------------------------------------------
// Starting point: get the csv file with algorithm parameters and set the page
// with valid algs info.
// ------------------------------------------------------------------------------------------------------

$(document).ready(function() {
	disableExecuteButton();
	showAnnotationsList();
	checkInputLink();
});

checkInputLink = function() {
	if(inputFile != "") {
		showProgress();
		$.ajax({
			url : inputFile,
			type : "GET",
			async : true,
			success : function(data, stato) {
				freeText = data;
				var uploaderUrl = appRoot + "/nlphub-uploader-servlet?getlang=on&freetext=" 
					+ encodeURIComponent(freeText) + "&dataminer=" + encodeURIComponent(dataMiner);
				if(gCubeToken.length > 0)
					uploaderUrl += "&gcube-token=" + gCubeToken; 
				$.ajax({
						url : uploaderUrl,
						type : "POST",
						async : true,
						contentType : "text/plain; charset=utf-8",
						success : function(data, stato) {
							hideProgress();
							$("#input-textarea").val(freeText);
							computedLanguage = data.language;
							initApplication();
						},
						error : function(richiesta, stato,
								errori) {
							alert("Unexpected Error. Status: "
									+ richiesta.status);
							hideProgress();
							textAreaEnable(true);
							$("#file-info").empty();
							initApplication();
						}
					});
			},
			error : function(richiesta, stato, errori) {
				alert("Unexpected error reading from link: '" + inputFile + "'.\nStatus: " + richiesta.status + " Error: " + errori + "\nClick OK to start application.");
				hideProgress();
				initApplication();
			}
		});
	}
	else initApplication();
}

initApplication = function() {
	$.ajax({
		url : "https://data.d4science.org/bnp4UDNyb21lSURkQXdDUnlSS0JkVWgzWk1KMUxWVGZHbWJQNStIS0N6Yz0",
		type : "GET",
		async : true,
		contentType : "text/plain; charset=utf-8",
		success : function(data, stato) {
			$("#ner-result-container").hide();
			var lineTokens = manageCsvData(data);
			getAlgorithms(lineTokens);
			buildLanguageSelection();
			buildLanguageList();
			buildAnnotations();
			resizeTable();
			resizeLogo();
			enableAjaxFileUpload();
			collapsibleHandler();
			
			$("#logo-image").click(function() {
				backHandler();
			});
			
			$("#back-ner-ui-button").click(function() {
				backHandler();
			});

			disableExecuteButton();
			var uploaderUrl = appRoot + "/nlphub-uploader-servlet?dataminer=" + encodeURIComponent(dataMiner);
			if(gCubeToken.length > 0)
				uploaderUrl += "&gcube-token=" + gCubeToken;
			
			$("#upload-button")
					.uploadFile(
							{
								url : uploaderUrl,
								fileName : "mytxtfile",
								maxFileCount : 100,
								multiple : false,
								maxFileSize : 1024 * 1000 * 1,
								showFileCounter : false,
								showCancel : true,
								//allowedTypes: "txt,.txt",
								dragDropStr : "<img class='img-prompt' src='img/upload.png' width='60px' height='60px' style='display:block; margin:auto; padding: 10px'>",
								extErrorStr : "Error. Text file only",
								sizeErrorStr : "Error. Max size: 6 Mb",
								onLoad : function(obj) {
									txtFlag = true;
									$("#file-info").remove();
									$("#reset-upload").remove();
									$("#fu-container")
											.append(
													"<div id=\"right-child\" class=\"float-right-div\"></div>");
									$("#right-child")
											.append(
													"<div id=\"file-info\" class=\"centered\"></div>");
									$("#right-child")
											.append(
													"<div id=\"reset-upload\" class=\"centered\">Cancel</div>");
									$("#reset-upload").hide();
									$("#reset-upload").click(function() {
												resetExecuteButton();
												$("#file-info").empty();
												$("#reset-upload").css(
														"display", "none");
												textAreaEnable(true);
											});
									savedAnnotations = "";
									setEventListeners();
								},
								onSelect : function(files) {
									var fileName = files[0].name;
									var extension = "" + fileName.substring(fileName.lastIndexOf("."));
									if(extension.toUpperCase() == ".TXT") {
										showProgress();
										textAreaEnable(false);
										$("#input-textarea").val("");
									} else {
										txtFlag = false;
										alert("The application supports text file only (.TXT)");
									}
									publicLink = null;
									textAreaEnable(false);
									$("#input-textarea").val("");
								},
								onSubmit: function(files) {
									var submitFlag = txtFlag;
									txtFlag = true;
									return submitFlag;
								},
								onSuccess : function(files, data, xhr) {
									hideProgress();
									checkLanguage(data.language);
									selectAnnotationsByLanguage();
									$("#reset-upload").css("display",
											"inline");
									$("#file-info").empty();
									$("#file-info")
											.append(
													"Uploaded: <span style=\"color:#4CAF50; letter-spacing: 1px; font-weight: bold;\">"
															+ files
															+ "</span>");
									publicLink = data.message;
									enableExecuteButton();
									if (publicLink == null) {
										alert("Error uploading file.");
									}
								},
								onError : function(files, status, errMsg,
										pd) {
									hideProgress();
									textAreaEnable(true);
									alert(errMsg);
								}
							});
			
			if($("#input-textarea").val() != "") {
				disableAjaxFileUpload();
				if(computedLanguage != "") {
					checkLanguage(computedLanguage);
					selectAnnotationsByLanguage();
					computedLanguage = "";
				}
				enableExecuteButton();
			}
		},
		error : function(richiesta, stato, errori) {
			alert("Unexpected Error. Status: " + richiesta.status);
		}
	});
}

/*
 * Set the listeners on the text area and the execute button
 */
setEventListeners = function() {
	$(".ajax-file-upload").attr("id", "ajax-file-upload-id");
	
	$("#input-textarea").on("keyup", function() {
		enableDisableTextArea();
	});
	
	$("#input-textarea").change(function() {
		enableDisableTextArea();
	});
	
	window.addEventListener('contextmenu', function(e) {
        //alert("You've tried to open context menu"); //here you draw your own menu
        //e.preventDefault();
		enableDisableTextArea();
    }, false);
	
	$("#execute-button")
			.click(
					function() {
						if(!isEnabled())
							return;
						
						if ((publicLink == null)
								&& ($("#input-textarea").val() == "")) {
							alert("You must upload a file or write some text in the text area before submit a request.");
							return;
						}

						disableExecuteButton();
						
						showProgress();
						// if some text has been written in the text area, then
						// a corresponding text file
						// must be written in the workspace and the public link
						// is set.
						if ($("#input-textarea").val().length > 0) {
							//if(publicLink == null) {
							freeText = $("#input-textarea").val();
							var uploaderUrl =  appRoot + "/nlphub-uploader-servlet?freetext="
											+ encodeURIComponent(freeText) + "&dataminer=" + encodeURIComponent(dataMiner);
							if(gCubeToken.length > 0)
								uploaderUrl += "&gcube-token=" + gCubeToken;

							$.ajax({
									url : uploaderUrl,
									type : "POST",
									async : true,
									contentType : "text/plain; charset=utf-8",
									success : function(data, stato) {
										publicLink = data.message;
										if (publicLink == null) {
											alert("Error uploading file.");
										}
										runAlgorithm();
									},
									error : function(richiesta, stato,
											errori) {
										alert("Unexpected Error. Status: "
												+ richiesta.status);
										hideProgress();
										textAreaEnable(true);
										$("#file-info").empty();
									}
								});
								//}
								//else runAlgorithm();
						}

						else {
							runAlgorithm();
						}
					});
}

collapsibleHandler = function() {
//	$('.collapsible').collapsible();
 //$('.collapsible').collapsible({
//	    onOpen: function(el) {  
//	    	if(el.index() == 0)
//	    		$('.collapsible').collapsible('close', 1);
//	    	else 
//	    		$('.collapsible').collapsible('close', 0);
//	    }, 
//	    onClose: function(el) { 
//	    	if(el.index() == 0)
//	    		$('.collapsible').collapsible('open', 1);
//	    	else
//	    		$('.collapsible').collapsible('open', 0);
//	    } 
//	  });
}

enableAjaxFileUpload= function() {
	$(".ajax-file-upload").attr("enabled", "true");
	$(".ajax-file-upload").css("background", pageGreen);
	try {
		document.getElementById("ajax-file-upload-id").removeEventListener("click", listenAjaxFileUpload);
	}catch(err) {
		console.log(err.message);
	}
}

disableAjaxFileUpload= function() {
	$(".ajax-file-upload").attr("enabled", "false");
	$(".ajax-file-upload").css("background", pageGray);
	try {
		document.getElementById("ajax-file-upload-id").removeEventListener("click", listenAjaxFileUpload);
		document.getElementById("ajax-file-upload-id").addEventListener("click", listenAjaxFileUpload);
	}catch(err) {
		document.getElementById("ajax-file-upload-id").addEventListener("click", listenAjaxFileUpload);
	}
	
}

listenAjaxFileUpload = function(event) {
	event.preventDefault();
}


backHandler = function() {
	if($("#ner-ui").is(":visible"))
		return;
	$("#ner-result-container").hide();
	$("#ner-ui").show();
	if(publicLink != null) {
		enableExecuteButton();
		if(document.getElementById("reset-upload")  != null) {
			if($("#reset-upload").is(":visible"))
				textAreaEnable(false);
		}
	}
}

/*
 * Utility function processing the language indication returned by the language recognition service
 */
checkLanguage = function(lang) {
	if(lang == 'unavailable')
		return;
	var options = $("#language-select option");
	for(var i=0; i<options.length; i++) {
		if(options[i].innerText.toLowerCase() == lang.toLowerCase()) {
			$("#language-select").val(options[i].innerText);
			buildAnnotations();
			return;
		}
	}
	alert("The uploaded file seems to be in " + lang + ", but this language is not currently supported. Please, be aware of this, should you decide to continue and use the tools of another language... \"Praemonitus praemunitus!\"");
}

/*
 * CSV parser 
 */
manageCsvData = function(data) {
	var tokensPerLine = 8;
	
	// first of all: split on the "newline" character in order to
	// get all lines.
	var lines = data.split("\n");
	var tokens = [], lineTokens = [];

	// second: parse each line
	for (i in lines) {
		var line = ',' + lines[i];
		var tokenStart = -1;
		for (var j = 0; j < line.length; j++) {
			if (line.charAt(j) == '\"') {
				j = line.indexOf('\"', j + 1);
				if (j < 0)
					return;
				continue;
			}

			if (line.charAt(j) == ',') {
				if (tokenStart == -1) {
					tokenStart = j;
				} else {
					tokens.push(line.substring(tokenStart + 1, j));
					tokenStart = j;
				}
			}
		}
		// get the new token and push it in the array
		tokens.push(line.substring(tokenStart + 1));
		
		if(tokens.length != tokensPerLine)
			continue; // skip...
		
		lineTokens.push(tokens);
		var description = tokens[1].toUpperCase().trim();
		if(description == "CLOUD COMPUTING")
			dataMiner = tokens[2];
		tokens = [];
	}

	return lineTokens;
}

/*
 * Map the supported algorithms (from CSV) in the internal global algorithm array
 */
getAlgorithms = function(lineTokens) {
	// build the list of supported algorithms
	for (i = 0; i < lineTokens.length; i++) {
		if ((i == 0) || (lineTokens[i].length != 8))
			continue; // skip the header
		if (lineTokens[i][1].toUpperCase().trim() != activePage.toUpperCase())
			continue;
		if (lineTokens[i][7].trim().toUpperCase() == "OK") {
			var algName = lineTokens[i][0].trim();
			var algDescription = lineTokens[i][1].trim();
			var algId = lineTokens[i][2].trim();
			var annotationList = lineTokens[i][3].replace(/"/g, " ").trim();
			var language = lineTokens[i][4].replace(/"/g, " ").trim();

			algorithms.push ( {
				"name" : algName,
				"description" : algDescription,
				"id" : algId,
				"lang" : language,
				"annotations" : annotationList
			});
			
			algIndexedArray[algorithms[algorithms.length-1].id.substr(algorithms[0].id.lastIndexOf(".")+1)] = algorithms[algorithms.length-1];
		}
	}
}

/*
 * Build the annotation list based on the language selected
 */
buildAnnotations = function() {
	annotations = [];
	var language = $("#language-select").val();
	for (i in algorithms) {
		if (algorithms[i].lang.toLowerCase() != language.toLowerCase())
			continue;
		var annotationList = algorithms[i].annotations;
		var a = annotationList.split(/\s|,/);
		for (j in a) {
			a[j] = a[j].trim();
			if (a[j].length > 0) {
				var thereIs = false;
				for (k in annotations) {
					if (annotations[k].toUpperCase() == a[j].toUpperCase()) {
						thereIs = true;
						break;
					}
				}
				if (!thereIs)
					annotations[annotations.length] = a[j];
			}
		}
	}
}

/*
 * Build the language array
 */
buildLanguageSelection = function() {
	for (i in algorithms) {
		var languageList = algorithms[i].lang;
		var langs = languageList.split(/\s|,/);
		for (j in langs) {
			langs[j] = langs[j].trim();
			if (langs[j].length > 0) {
				var thereIs = false;
				for (k in languages) {
					if (languages[k].toUpperCase() == langs[j].toUpperCase()) {
						thereIs = true;
						break;
					}
				}
				if (!thereIs)
					languages[languages.length] = langs[j];
			}
		}
	}
}

enableExecuteButton = function() {
	$("#execute-button").css("background-color", pageGreen);
	$("#execute-button").attr("enable", "true");
}

disableExecuteButton = function() {
	$("#execute-button").css("background-color", pageGray);
	$("#execute-button").attr("enable", "false");
}

isEnabled = function() {
	if($("#execute-button").attr("enable") == "true")
		return true;
	return false;
}

enableDisableTextArea = function() {
	if ($("#input-textarea").val() == "") {
		disableExecuteButton();
		enableAjaxFileUpload();
	}
	else {
		enableExecuteButton();
		disableAjaxFileUpload();
	}
}


/*
 * show the in-progress popup
 */
showProgress = function() {
	$(".hidden-div").css("display", "block");
	$(".hidden-div").show();
}

/*
 * hide the in-progress popup
 */
hideProgress = function() {
	$(".hidden-div").css("display", "none");
	$(".hidden-div").hide();
}

/*
 * run the algorithms selected by the chosen language
 */
runAlgorithm = function() {
	if (publicLink == null) {
		alert("No input text available for the service.");
		return;
	}
	var list = buildInputAnnotationList();
	var annList = "";
	for (i in list) {
		annList += list[i] + ",";
	}
	annList = annList.substring(0, annList.length - 1);
	savedAnnotations = annList;

	// build the algorithm list, selecting on:
	// [1] the language
	// [2] the annotations
	
	var algList = "";
	for (j in algorithms) {
		if (algorithms[j].lang.toLowerCase().indexOf(
				$("#language-select").val().toLowerCase()) >= 0) {
			var algAnnotations = algorithms[j].annotations.toLowerCase();
			for(k in list) {
				var a = list[k].toLowerCase();
				if(algAnnotations.indexOf(a) > -1) {
					algList += encodeURI(algorithms[j].id) + ",";
					break;
				}
			}
			
		}
	}
	if (algList.length == 0) {
		alert("Warning. No algorithm matching with selected language.");
		hideProgress();
		return;
	}
	algList = algList.substring(0, algList.length - 1);

	var parameters = "annotations=" + annList;
	parameters += "&dataminer=" + encodeURIComponent(dataMiner);
	parameters += "&lang=" + $("#language-select").val();
	parameters += "&plink=" + encodeURIComponent(publicLink);
	parameters += "&algs=" + algList;

	var nlphubUrl = appRoot + "/nlphub-servlet?" + parameters;
	if(gCubeToken.length > 0)
		nlphubUrl += "&gcube-token=" + gCubeToken;
	$.ajax({
		url : nlphubUrl,
		type : "POST",
		async : true,
		success : function(data, stato) {
			textAreaEnable(true);
			if (typeof (data.response) != 'undefined') {
				var jsonOut = getOutputJson(data.message);
			} else if (typeof (data.error) != 'undefined') {
				hideProgress();
				alert(data.message);
			} else {
				hideProgress();
				alert("Unexpected response");
			}
		},
		error : function(richiesta, stato, errori) {
			hideProgress();
			textAreaEnable(true);
			alert("Unexpected Error. Status: " + richiesta.status);
		}
	});
}

/*
 * Get the final json returned by the server
 */
getOutputJson = function(message) {
	var tobemap = "";
	for (var i = 0; i < message.length; i++) {
		var splitted = message[i].split(":::");
		if(splitted[1].toLowerCase().trim() == "error") {
			alert("Some error occurrend running algorithm " + splitted[0] + ". Trying to get other results...");
		}
		else {
			tobemap += message[i] + "|";
		}
	}

	tobemap = tobemap.substring(0, tobemap.length - 1);

	var parameters = "annotations=" + savedAnnotations;
	parameters += "&plink=" + encodeURI(publicLink);
	parameters += "&lang=" + $("#language-select").val();
	parameters += "&tobemap=" + encodeURI(tobemap);
	//console.log(parameters);

	var mapperUrl = appRoot + "/nlphub-mapper-servlet?" + parameters;
	if(gCubeToken.length > 0)
		mapperUrl += "&gcube-token=" + gCubeToken;

	$.ajax({
		url : mapperUrl,
		type : "POST",
		async : true,
		success : function(data, stato) {
			hideProgress();
			//console.log(data);
			if ((typeof (data.response) != "undefined")
					&& (data.response.trim().toUpperCase() == "ERROR")) {
				alert("ERROR\n" + data.message);
			} else {
				savedAnnotations = "";
				showResult(data);
			}
		},
		error : function(richiesta, stato, errori) {
			hideProgress();
			$("#reset-upload").hide();
			savedAnnotations = "";
			//publicLink = null;
			alert("Unexpected Error. Status: " + richiesta.status);
		}
	});
}

/*
 * Show the computation result 
 */
showResult = function(data) {
	$("#ner-ui").hide();
	$("#ner-result-container").show();

	jsonContent = data;
	resultText = jsonContent.output.text;

	$("#result-header-left").empty();
	$("#result-header-right").empty();
	$("#result-params-div").empty();
	$("#result-text-div").empty();

	$("#result-header-left").append(
			"You can download the overall result as a JSON file <a href='"
					+ jsonContent.link + "'>here</a>");
	$("#result-header-right").append("&nbsp;");
	var localText = resultText;
	localText = resultText.replace(/\n/g, "<br>");
	$("#result-text-div").empty();
	$("#result-text-div").append("<p>" + localText + "</p>");

	buildAlgortihmList();
	buildAnnotationList(jsonContent.output.annotations);
}

/*
 * Build the list of radio-button controls with the annotations
 */
buildAnnotationList = function(list) {
	var colorDisabled = "CCCCCC";
	var color;
	var colors = [];
	var annotations = list.split(",");
	for (var i = 0; i < annotations.length; i++) {
		do {
			color = randomRGB();
		} while (color == colorDisabled);
		colors[colors.length] = color;
	}

	$("#result-params-div").append("<form id='colored-annotations'></form>");
	
	var firstRadio = true;
	for (var i = 0; i < annotations.length; i++) {
		var cb = "<input type='radio' name='foo-ner-annotations' ";
		if (!checkAnnotation(annotations[i])) {
			cb += "disabled ";
			colors[i] = colorDisabled;
		}
		
		if(firstRadio) {
			if(cb.indexOf("disabled") < 0) {
				firstRadio = false;
				cb += "checked ";
			}
		}

		
		cb += "named='" + annotations[i] + "' value='" + colors[i]
				+ "' id='color-" + i + "' class='filled-in'>";
		cb += "<label for='color-" + i
				+ "'><span style='font-weight:bold; color:#" + colors[i] + "'>"
				+ annotations[i] + "</span></label><br>";
		$("#colored-annotations").append(cb);
		
	}
	
	$("#colored-annotations :radio").change(function() {
		if (this.checked) {
			checkedAnnotation = this.getAttribute("named"); 
			filterAlgorithmsByAnnotation(checkedAnnotation);
			rewriteText("#" + this.value);
		}
	});
	
	showAnnotationsList();
	
	$("#colored-annotations :radio").change();
}
/*
 * Utility
 */
showAnnotationsList = function() {
	$('.collapsible').collapsible('close', 0);
	$('.collapsible').collapsible('close', 1);
	$('.collapsible').collapsible('open', 1);
}

/* 
 * build the list of check-box controls for algorithms
 */
buildAlgortihmList = function() {
	$("#algorithm-params-div").empty();
	
	for (var i = 0; i < jsonContent.output.result.length; i++) {
		var cb = "<p><input type='checkbox' name='foo-ner-algs' checked named='" 
			+ jsonContent.output.result[i].algorithm + "' id='algorithm" + i + "'>";
		cb += "<label for='algorithm" + i + "'>" + findNameByAlgorithmId(jsonContent.output.result[i].algorithm) +"</label></p>"; 
		$("#algorithm-params-div").append(cb);
		
	}
	
	$("#algorithm-params-div :checkbox").change(function () {
		//buildCheckedAlgs();
		rewriteText($("#colored-annotations :checked")[0].value);
	});
}

/*
 * Utility function
 */
findNameByAlgorithmId = function(id) {
	for(i in algorithms) {
		if(algorithms[i].id.substr(algorithms[i].id.lastIndexOf(".")+1) == id)
			return algorithms[i].name;
	}
	return id;
}

/*
 * Utility function 
 */
countSubstringOccurrencies = function(string, substring) {
	var occurrencies = 0;
	var index = 0;
	var s = string;
	while (index >= 0) {
		index = s.indexOf(substring);
		if (index >= 0) {
			occurrencies++;
			s = s.substring(index + 1);
		}
	}
	return occurrencies;
}


/*
 * Utility
 */

enhanceColor = function(color) {
	var c = eval("0x" + color);
	var hi = Math.round(c / 16);
	if(hi < 15) {
		hi += Math.round((15 - hi) / 1.5);
	}
	if(hi > 15) hi = 15;
	return '' + hexLetters[hi] + hexLetters[c%16];
}

/*
 * Write the html paragraph <p> containing the text highlighted on annotation value
 */
rewriteText = function(color) {
	if(color.startsWith("#"))
		color = color.substring(1);
	
	$("#result-text-div").empty();
	var complemetar = 0xFFFFFF - eval("0x" + color);
	var complement = complemetar.toString(16);
	var R = enhanceColor(complement.substring(0,2));
	var G = enhanceColor(complement.substring(2,4));
	var B = enhanceColor(complement.substring(4));
	complement = "#" + R + G + B;
	showProgress();
	$(".hidden-div").show();
	window.setTimeout(function() {
		var indices = getIndices();
		$(".hidden-div").hide();	

		$("#result-header-right").empty();
		$("#result-header-right").append("<span style='color:" + color + ";'>" + checkedAnnotation + "</span> occurs " + indices.length + " times.");

		if(indices.length != 0) {
			var indexedText = "";
	
			if ((typeof (indices) == 'undefined') || (indices.length == 0)) {
				indexedText = resultText;
				indexedText = indexedText.replace(/\n/g, "<br>");
				indexedText = indexedText.replace(/</g, "&lt;");
				indexedText = indexedText.replace(/>/g, "&gt;");
				$("#result-text-div").append("<p>" + indexedText + "</p>");
				return;
			}
	
			var t = 0;
			var offset = 0;
			for (var i = 0; i < indices.length; i++) {
				var index = indices[i];
				var start = index[0];
				var end = index[1];
				indexedText += resultText.substring(t, start);
	
				var colored = "<span style='color:" + color + "; background:"
						+ complement + "; font-weight:bold;'>"
						+ resultText.substring(start, end) + "</span>";
				indexedText += colored;
				t = end;
			}
			if (t < resultText.length)
				indexedText += resultText.substring(t);
	
			indexedText = indexedText.replace(/\n/g, "<br>");
			$("#result-text-div").append("<p>" + indexedText + "</p>");
		}
		else {
			$("#result-text-div").append("<p>" + resultText + "</p>");
		}
	}, 50);
}

filterAlgorithmsByAnnotation = function() {
	if($("#result-params-div input[type=radio]:checked").length < 1)
		return;
	var annotation = $("#result-params-div input[type=radio]:checked")[0].getAttribute("named");
	var algs = $("#algorithm-params-div input[type=checkbox]");
	for(var i=0; i< algs.length; i++) {
		var named = $("#algorithm-params-div input[type=checkbox]")[i].getAttribute("named");
		var annList =  algIndexedArray[named].annotations;
		if(annList.indexOf(annotation) >= 0) {
			$($("#algorithm-params-div input[type=checkbox]")[i]).prop("checked", true);
		}
		else {
			$($("#algorithm-params-div input[type=checkbox]")[i]).prop("checked", false);
		}
	}
}


/*
 * Find if the annotation is present in the json 
 */
checkAnnotation = function(annotation) {
	for (var i = 0; i < jsonContent.output.result.length; i++) {
		var entities = jsonContent.output.result[i].entities;
		for (var j = 0; j < entities.length; j++) {
			a = entities[j][annotation];
			if (typeof a != 'undefined') {
				if(a.length > 0)
					return true;
			}
		}
	}
	return false;
}

/*
 * Retrieve the annotation indices from the json
 */
getIndices = function() {
	var checkedAlgs = $("#algorithm-params-div input[type=checkbox]:checked");
	var indices = [];
	// get indices
	for (var i = 0; i < jsonContent.output.result.length; i++) {
		// filter on algorithm
		var found = false;
		for(var j=0; j<checkedAlgs.length; j++) {
			if(checkedAlgs[j].getAttribute("named") == jsonContent.output.result[i].algorithm) {
				found = true;
				break;
			}
		}
		if(!found)
			continue;
		
		var entities = jsonContent.output.result[i].entities;
		for (var j = 0; j < entities.length; j++) {
			// filter on annotation
			a = entities[j][checkedAnnotation];
			if (typeof a != 'undefined') {
				indices[i] = [];
				for (var k = 0; k < a.length; k++) {
					var index = a[k].indices;
					indices[i][k] = index;
				}
			}
		}
	}

	if(indices.length == 0)
		return indices;
	
	var indices2 = [];
	for (var i = 0; i < indices.length; i++) {
		if (typeof (indices[i]) != 'undefined')
			indices2[indices2.length] = indices[i];
	}

	return mergeIndices(indices2);
}

/*
 * Merge the indices
 */
mergeIndices = function(indices) {
	var newIndices = [];
	newIndices = mergeAll(indices);
	return newIndices;
}

/*
 * Utility function
 */
resetExecuteButton = function() {
	publicLink = null;
	disableExecuteButton();
}

/*
 * Resize the annotation table based on the screen geometry
 */
resizeTable = function() {
	// resize the annotation table
	$("#annotations-table").empty();
	var rowId = "";
	var ratio = window.innerWidth / window.innerHeight;

	if (ratio <= 0.35) {
		tableRawSize = 1;
	} else if ((ratio > 0.35) && (ratio <= 0.75)) {
		tableRawSize = 2;
	} else if ((ratio > 0.75) && (ratio <= 1)) {
		tableRawSize = 3;
	} else if ((ratio > 1) && (ratio <= 1.5)) {
		tableRawSize = 4;
	} else {
		tableRawSize = 5;
	}

	for (var i = 0; i < annotations.length; i++) {
		if (i % tableRawSize == 0) {
			rowId = "row-" + i;
			$("#annotations-table").append("<tr id=\"" + rowId + "\"></tr>");
		}

		var annotationElement = "<input type=\"checkbox\" id=\"check-" + i
				+ "\" value=\"" + annotations[i]
				+ "\" checked=\"checked\"></input> <label for=\"check-" + i
				+ "\">" + annotations[i] + "</label>";
		if((annotations[i].toLowerCase() == "keyword") || (annotations[i].toLowerCase() == "event")) {
			annotationElement = "<input type=\"checkbox\" id=\"check-" + i
			+ "\" value=\"" + annotations[i]
			+ "\"></input> <label for=\"check-" + i
			+ "\">" + annotations[i] + "</label>";
		}
		
		$("#" + rowId).append("<td>" + annotationElement + "</td>");
	}
}

/*
 * Resize the page logo image based on the screen geometry
 */
resizeLogo = function() {
	if (window.innerWidth < 200)
		$("#logo-image").width(window.innerWidth - 10);
}

/*
 * Build the annotation list for the service invocation
 */
buildInputAnnotationList = function() {
	var list = [];
	for (var i = 0; i < annotations.length; i++) {
		if ($("#check-" + i).is(":Checked"))
			list[list.length] = $("#check-" + i).val();
	}
	return list;
}

/*
 * Handler for the window resize event
 */
window.onresize = function(event) {
	resizeTable();
	resizeLogo();
};

/*
 * Handler for the file upload control
 */
$(".ajax-file-upload-abort").on("DOMAttrModified", function(event) {
	$(".ajax-file-upload-abort").css("display", "none");
	if (event.attributeName == "display") { // which attribute you want to watch
											// for changes
		$(".ajax-file-upload-abort").css("display", "none");
	}
});

/*
 * Build the option list of supported language
 */
buildLanguageList = function() {
	// build the language selection input control
	var defaultLanguage = null;
	for (i in languages) {
		languages[i] = languages[i].trim();
		languages[i] = languages[i].replace(/\w\S*/g, 
				function(txt) {
					return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
					});
		if(languages[i] == "English")
			defaultLanguage = languages[i];
		
		var opt = "<option value=\"" + languages[i]
				+ "\" selected=\"selected\">" + languages[i] + "</option>";
		if (i > 1)
			opt = "<option value=\"" + languages[i] + "\">" + languages[i]
					+ "</option>";
		$("#language-select").append(opt);
	}
	
	if(defaultLanguage != null)
		$("#language-select").val(defaultLanguage);
	
	$("#language-select").on("change", function() {
		selectAnnotationsByLanguage();
	});
	
}

/*
 * Utility
 */
selectAnnotationsByLanguage = function() {
	buildAnnotations();
	resizeTable();
}

/*
 * Enable/disable the input text area
 */
textAreaEnable = function(enable) {
	if (enable == true)
		$("#input-textarea").prop('disabled', false);
	else
		$("#input-textarea").prop('disabled', true);
}

/*
 * Get a random RGB color
 */
randomRGB = function() {
	var color = '';
	var couple = '';
	for (var i = 0; i < 3; i++) {
		couple = '' + hexLetters[Math.floor(Math.random() * 10)] + hexLetters[Math.floor(Math.random() * 16)];
		color += couple;
	}

	return color;
}