var presentation = ["<word>guitarist<\/word>","<word>paraplegic<\/word>","<word>accept his disability<\/word>","<word>fact<\/word>","<word>he will never achieve his dream<\/word>","<word>becoming a dancer<\/word>","<word>Artie Abrams<\/word>","<word>manual wheelchair user<\/word>","<word>spinal cord injury<\/word>","<word>car crash<\/word>","<word>first season<\/word>","<phrase><strong data-readahead=\"Artie Abrams\" class=\"presentation_word\">Artie Abrams<\/strong> is a <strong data-readahead=\"guitarist\" class=\"presentation_word\">guitarist<\/strong> and <strong data-readahead=\"paraplegic\" class=\"presentation_word\">paraplegic<\/strong> <strong data-readahead=\"manual wheelchair user\" class=\"presentation_word\">manual wheelchair user<\/strong>. Artie uses a wheelchair due to a <strong data-readahead=\"spinal cord injury\" class=\"presentation_word\">spinal cord injury<\/strong> he received in a <strong data-readahead=\"car crash\" class=\"presentation_word\">car crash<\/strong> at the age of eight. During the <strong data-readahead=\"first season\" class=\"presentation_word\">first season<\/strong>, he begins to <strong data-readahead=\"accept his disability\" class=\"presentation_word\">accept his disability<\/strong> and the <strong data-readahead=\"fact\" class=\"presentation_word\">fact<\/strong> <strong data-readahead=\"he will never achieve his dream\" class=\"presentation_word\">he will never achieve his dream<\/strong> of <strong data-readahead=\"becoming a dancer\" class=\"presentation_word\">becoming a dancer<\/strong>.<\/phrase>","<word>relationship<\/word>","<word>breaks up with him<\/word>","<word>beginning of the second season<\/word>","<word>Artie begins dating cheerleader<\/word>","<word>two remain a couple<\/word>","<word>most of the season<\/word>","<word>breaking up<\/word>","<word>first season<\/word>","<word>New Directions<\/word>","<word>Tina Cohen-Chang<\/word>","<word>Brittany Pierce<\/word>","<phrase>In the <strong data-readahead=\"first season\" class=\"presentation_word\">first season<\/strong>, he has a <strong data-readahead=\"relationship\" class=\"presentation_word\">relationship<\/strong> with fellow <strong data-readahead=\"New Directions\" class=\"presentation_word\">New Directions<\/strong> member <strong data-readahead=\"Tina Cohen-Chang\" class=\"presentation_word\">Tina Cohen-Chang<\/strong>, who <strong data-readahead=\"breaks up with him\" class=\"presentation_word\">breaks up with him<\/strong> at the <strong data-readahead=\"beginning of the second season\" class=\"presentation_word\">beginning of the second season<\/strong>. Then, <strong data-readahead=\"Artie begins dating cheerleader\" class=\"presentation_word\">Artie begins dating cheerleader<\/strong> <strong data-readahead=\"Brittany Pierce\" class=\"presentation_word\">Brittany Pierce<\/strong>. The <strong data-readahead=\"two remain a couple\" class=\"presentation_word\">two remain a couple<\/strong> for <strong data-readahead=\"most of the season\" class=\"presentation_word\">most of the season<\/strong> before <strong data-readahead=\"breaking up\" class=\"presentation_word\">breaking up<\/strong>.<\/phrase>","<word>third season<\/word>","<word>directs the school musical<\/word>","<word>television special<\/word>","<word>directs Grease<\/word>","<word>Finn Hudson<\/word>","<word>senior year<\/word>","<word>accepted<\/word>","<word>glee club<\/word>","<word>film school<\/word>","<word>New York<\/word>","<phrase>In the <strong data-readahead=\"third season\" class=\"presentation_word\">third season<\/strong>, Artie, then a junior, <strong data-readahead=\"directs the school musical\" class=\"presentation_word\">directs the school musical<\/strong> and a <strong data-readahead=\"television special\" class=\"presentation_word\">television special<\/strong> featuring the <strong data-readahead=\"glee club\" class=\"presentation_word\">glee club<\/strong> for the local PBS station. He also <strong data-readahead=\"directs Grease\" class=\"presentation_word\">directs Grease<\/strong> along with <strong data-readahead=\"Finn Hudson\" class=\"presentation_word\">Finn Hudson<\/strong> during his <strong data-readahead=\"senior year\" class=\"presentation_word\">senior year<\/strong>. He gets <strong data-readahead=\"accepted\" class=\"presentation_word\">accepted<\/strong> into a <strong data-readahead=\"film school\" class=\"presentation_word\">film school<\/strong> in <strong data-readahead=\"New York\" class=\"presentation_word\">New York<\/strong>.<\/phrase>","<word>starts dating Kitty<\/word>","<word>encourages him to keep their affair secret<\/word>","<word>reveals it to the Glee Club<\/word>","<word>sure about her love for him<\/word>","<word>primary candidate<\/word>","<word>valedictorian<\/word>","<word>loses it to Blaine<\/word>","<phrase>He later <strong data-readahead=\"starts dating Kitty\" class=\"presentation_word\">starts dating Kitty<\/strong>, who <strong data-readahead=\"encourages him to keep their affair secret\" class=\"presentation_word\">encourages him to keep their affair secret<\/strong>. But later, she <strong data-readahead=\"reveals it to the Glee Club\" class=\"presentation_word\">reveals it to the Glee Club<\/strong> as she is <strong data-readahead=\"sure about her love for him\" class=\"presentation_word\">sure about her love for him<\/strong>. Though he is the <strong data-readahead=\"primary candidate\" class=\"presentation_word\">primary candidate<\/strong> for being the <strong data-readahead=\"valedictorian\" class=\"presentation_word\">valedictorian<\/strong>, he <strong data-readahead=\"loses it to Blaine\" class=\"presentation_word\">loses it to Blaine<\/strong> as a result of his sacrifice for Tina.<\/phrase>","<word>season six<\/word>","<word>Brittany and Santana<\/word>","<word>plan their wedding<\/word>","<word>Tina's proposal to Mike Chang<\/word>","<word>rejected<\/word>","<word>Artie promises<\/word>","<word>they are both single<\/word>","<word>ten years<\/word>","<word>should marry each other<\/word>","<word>series finale<\/word>","<word>they are dating once again<\/word>","<word>New York<\/word>","<word>film school<\/word>","<word>Lima<\/word>","<word>help<\/word>","<phrase>He goes to <strong data-readahead=\"New York\" class=\"presentation_word\">New York<\/strong> after his graduation and joins <strong data-readahead=\"film school\" class=\"presentation_word\">film school<\/strong>. He returns to <strong data-readahead=\"Lima\" class=\"presentation_word\">Lima<\/strong> in <strong data-readahead=\"season six\" class=\"presentation_word\">season six<\/strong> to <strong data-readahead=\"help\" class=\"presentation_word\">help<\/strong> <strong data-readahead=\"Brittany and Santana\" class=\"presentation_word\">Brittany and Santana<\/strong> <strong data-readahead=\"plan their wedding\" class=\"presentation_word\">plan their wedding<\/strong>. After <strong data-readahead=\"Tina's proposal to Mike Chang\" class=\"presentation_word\">Tina's proposal to Mike Chang<\/strong> is <strong data-readahead=\"rejected\" class=\"presentation_word\">rejected<\/strong>, <strong data-readahead=\"Artie promises\" class=\"presentation_word\">Artie promises<\/strong> that if <strong data-readahead=\"they are both single\" class=\"presentation_word\">they are both single<\/strong> in <strong data-readahead=\"ten years\" class=\"presentation_word\">ten years<\/strong> that they <strong data-readahead=\"should marry each other\" class=\"presentation_word\">should marry each other<\/strong>. In the <strong data-readahead=\"series finale\" class=\"presentation_word\">series finale<\/strong>, <strong data-readahead=\"they are dating once again\" class=\"presentation_word\">they are dating once again<\/strong>.<\/phrase>"];
	var currentPosition = 0;
	var totalPositions = 0;
	var timePerWord = 1500;
	var timePerPhraseWord = 120
	var readAheadPlayerTimer;
	var autoPlay = true;
	var setMinimized = false;

	var wordSpeedOptions = {'Slower':2000,'Moderate':1200,'Fast':800};
	var phraseSpeedOptions = {'Slower':280,'Moderate':200,'Fast':80};
	var defaultWordSpeedOption = 'Moderate';
	var defaultPhraseSpeedOption = 'Moderate';
	var logToLTI = false;

	$(window).load(function(){
		totalPositions = presentation.length;
		if (totalPositions > 0){
			$('body').prepend('<div id="read_ahead_player_back"></div>');
			$('body').prepend('<div id="read_ahead_player"></div>');
			$('#read_ahead_player').prepend('<div id="read_ahead_player_field" class="read_ahead_word_section"></div>');
			initializeReadAheadControls();
			initializeReadAheadSlider();
			initializeReadAheadSpeedOptions();
			currentReadAheadControls();
			resumeReadAheadPlayback();
		}
	});

	$(document).keyup(function(e){
		switch(e.which) {
			case 37: 
				pauseReadAheadPresentation();
				priorReadAheadPresentationItem();
				break;
			case 39:
				pauseReadAheadPresentation();
				nextReadAheadPresentationItem();
				break;
			default:
				break;
		}

	});

	function initializeReadAheadControls(){
		var s = '';
		s += '<a href="javascript:void(0)" onclick="read_ahead_switch_min_max(true);" id="read_ahead_player_max_min" class="player-icons" aria-label="minimize/maximize player">';
		s += '<span class="fa-stack fa-lg " aria-hidden><i class="fa fa-circle fa-stack-2x"></i><i class="fa fa-minus fa-stack-1x fa-inverse"></i></span>';
		s += '</a>';
		s += '<div id="read_ahead_controls">';
		s += '<a href="javascript:void(0)" onclick="priorReadAheadPresentationItem()" id="read_ahead_player_previous_word" class="player-icons" aria-label="previous keyword">';
		s += '<span class="fa-stack fa-lg " aria-hidden><i class="fa fa-circle fa-stack-2x"></i><i class="fa fa-backward fa-stack-1x fa-inverse"></i></span>';
		s += '</a>';
		s += '<a href="javascript:void(0)" onclick="pauseReadAheadPresentation()" id="read_ahead_player_pause_play" class="player-icons" aria-label="play/pause">';
		s += '<span class="fa-stack fa-lg " aria-hidden><i class="fa fa-circle fa-stack-2x"></i><i class="fa fa-pause fa-stack-1x fa-inverse"></i></span>';
		s += '</a>';
		s += '<a href="javascript:void(0)" onclick="nextReadAheadPresentationItem()" id="read_ahead_player_next_word" class="player-icons" aria-label="next keyword">';
		s += '<span class="fa-stack fa-lg " aria-hidden><i class="fa fa-circle fa-stack-2x"></i><i class="fa fa-forward fa-stack-1x fa-inverse"></i></span>';
		s += '</a>';
		s += '</div>';
		$('#read_ahead_player').append(s);
	}

	function initializeReadAheadSlider(){
		var s = '';
		s += '<div class="read_ahead_slider" id="readAheadSlider">';
		s += '<div class="read_ahead_slider_bar" id="readAheadSliderBar"></div>';
		s += '</div>';
		$('#read_ahead_controls').prepend(s);
		updateReadAheadSliderPosition();
	}

	function initializeReadAheadSpeedOptions(){
		var s = '<div id="read_ahead_player_options">';
		s += '<div class="slider_control" id="slider_control_word_speed">';
		s += ' Word Speed<br/>';
		s += '<div class="slider_bar">';
		optionCount = 0;
		for (index in wordSpeedOptions) { optionCount++; }
		optionWidth = 100 / optionCount;
		for (index in wordSpeedOptions) {
			var option = wordSpeedOptions[index];
			if (index == defaultWordSpeedOption) {
				s += '<a href="javascript:void(0)" id="slider_control_word_speed_'+option+'" onclick="updateReadAheadWordSpeed('+option+',this)" style="width:'+optionWidth+'%;" title="'+index+'" data-speed="'+option+'" class="current_speed" aria-label="'+index+'"></a>';
				updateReadAheadWordSpeed(option);
			} else {
				s += '<a href="javascript:void(0)" id="slider_control_word_speed_'+option+'" onclick="updateReadAheadWordSpeed('+option+',this)" style="width:'+optionWidth+'%;" title="'+index+'" data-speed="'+option+'" aria-label="'+index+'"></a>';
			}
		}
		s += '</div>';
		s += '</div>';
		s += '<div class="slider_control" id="slider_control_phrase_speed">';
		s += ' Phrase Speed<br/>';
		s += '<div class="slider_bar">';
		optionCount = 0;
		for (index in phraseSpeedOptions) { optionCount++; }
		optionWidth = 100 / optionCount;
		for (index in phraseSpeedOptions) {
			var option = phraseSpeedOptions[index];
			if (index == defaultWordSpeedOption) {
				s += '<a href="javascript:void(0)" id="slider_control_phrase_speed_'+option+'" onclick="updateReadAheadPhraseSpeed('+option+',this)" style="width:'+optionWidth+'%;" title="'+index+'" data-speed="'+option+'" class="current_speed" aria-label="'+index+'"></a>';
				updateReadAheadPhraseSpeed(option);
			} else {
				s += '<a href="javascript:void(0)" id="slider_control_phrase_speed_'+option+'" onclick="updateReadAheadPhraseSpeed('+option+',this)" style="width:'+optionWidth+'%;" title="'+index+'" data-speed="'+option+'" aria-label="'+index+'"></a>';
			}
		}
		s += '</div>';
		s += '</div>';
		s += '</div>';
		$('#read_ahead_controls').append(s);
	}

	function updateReadAheadWordSpeed(microseconds,sender) {
		microseconds = microseconds != undefined && microseconds > 0 ? microseconds : 0;
		if (microseconds > 0) { timePerWord = microseconds; }
		if (sender!=undefined) { 
			$('#slider_control_word_speed').find('a').removeClass('current_speed');
			$(sender).addClass('current_speed');
		}
		logReadAheadPlayerAction('updateReadAheadWordSpeed','Presentation',microseconds);
	}

	function updateReadAheadPhraseSpeed(microseconds,sender) {
		microseconds = microseconds != undefined && microseconds > 0 ? microseconds : 0;
		if (microseconds > 0 ) { timePerPhraseWord = microseconds; }
		if (sender!=undefined) { 
			$('#slider_control_phrase_speed').find('a').removeClass('current_speed');
			$(sender).addClass('current_speed');
		}
		logReadAheadPlayerAction('updateReadAheadPhraseSpeed','Presentation',microseconds);
	}

	function updateReadAheadSliderPosition(){
		var currentSliderBarWidth = 100 - (100 / totalPositions * (currentPosition + 1));
		$('#readAheadSliderBar').css('width',currentSliderBarWidth+'%');
	}

	function currentReadAheadControls(){
		$('#read_ahead_player_pause_play').show();
		if (currentPosition < totalPositions - 1)	{
			$('#read_ahead_player_next_word').removeClass('disabled');
		} else {
			$('#read_ahead_player_next_word').addClass('disabled');
		}
		if (currentPosition > 0) {
			$('#read_ahead_player_previous_word').removeClass('disabled');
		} else {
			$('#read_ahead_player_previous_word').addClass('disabled');
		}
	}

	function restartReadAheadPresentation(){
		currentPosition = 0;
		logReadAheadPlayerAction('restartReadAheadPresentation','Presentation','');
		resumeReadAheadPlayback();
	}

	function resumeReadAheadPlayback(){
		$('.fa-repeat').removeClass('fa-repeat').addClass('fa-play');
		$('#read_ahead_player_pause_play').each(function(){
			$(this).find('.fa-play').removeClass('fa-play').addClass('fa-pause');
			$(this).off('click');
			$(this).attr('onclick','pauseReadAheadPresentation()');
		});
		logReadAheadPlayerAction('resumeReadAheadPlayback','Presentation','');
		playReadAheadPresentation();
	}

	function pauseReadAheadPresentation(){
		$('#read_ahead_player_pause_play').each(function(){
			$(this).find('.fa-pause').removeClass('fa-pause').addClass('fa-play');
			$(this).off('click');
			$(this).attr('onclick','resumeReadAheadPlayback()');
		});
		logReadAheadPlayerAction('pauseReadAheadPresentation','Presentation','');
		read_ahead_pause();
	}

	function endReadAheadPresentation(){
		$('.fa-play').removeClass('fa-play').addClass('fa-repeat');
		$('.fa-pause').removeClass('fa-pause').addClass('fa-repeat');
		$('#read_ahead_player_pause_play').each(function(){
			$(this).off('click');
			$(this).attr('onclick','restartReadAheadPresentation()');
		});
		logReadAheadPlayerAction('endReadAheadPresentation','Presentation','');
		logLTIEndPresentation();
	}

	function playReadAheadPresentation(){
		autoPlay=true;
		currentPosition--;
		logReadAheadPlayerAction('playReadAheadPresentation','Presentation','');
		nextReadAheadPresentationItem(); 
	}

	function startReadAheadStepper(timeDisplayWord){
		clearInterval(readAheadPlayerTimer);
		readAheadPlayerTimer = setTimeout(function() { read_ahead_step(); },timeDisplayWord);
	}

	function stopReadAheadStepper(){
		clearInterval(readAheadPlayerTimer);
	}

	function read_ahead_step(){
		if (autoPlay) {
			nextReadAheadPresentationItem();
		}
	}

	function read_ahead_pause(){
		autoPlay=false;
		stopReadAheadStepper();
	}

	function showReadAheadPresentationItem(index){
		currentPosition = index;
		currentPresentationItem = presentation[currentPosition] != undefined ? presentation[currentPosition].trim() : "";
		if (currentPresentationItem != "") {
			currentItemWordCount = presentation[currentPosition].replace("\n","").split(" ").length;
			if (currentPresentationItem.startsWith("<word>")){
				startReadAheadStepper(currentItemWordCount*timePerWord);
				$('#read_ahead_player_field').html('<div class="read_ahead_word" style="display:block;">'+currentPresentationItem+'</div>');
				logReadAheadPlayerAction('showReadAheadPresentationItem','Word',currentPresentationItem);
		
			} else {
				startReadAheadStepper(currentItemWordCount*timePerPhraseWord);
				$('#read_ahead_player_field').html('<div class="read_ahead_text_box" style="display:block;"><div class="read_ahead_text">'+currentPresentationItem.replace("\n","<br />")+'</div></div>');
				logReadAheadPlayerAction('showReadAheadPresentationItem','Phrase','');
		
			}
		} else {
			if (currentPosition < totalPositions) {
				nextReadAheadPresentationItem();
			} else {
				endReadAheadPresentation();
				read_ahead_minimize();
			}
		}
		currentReadAheadControls();
		updateReadAheadSliderPosition();
		saveReadAheadPosition();
	}

	function priorReadAheadPresentationItem(){
		stopReadAheadStepper();
		logReadAheadPlayerAction('priorReadAheadPresentationItem','Controls','');
		showReadAheadPresentationItem(currentPosition-1);
	}


	function nextReadAheadPresentationItem(){
		stopReadAheadStepper();
		logReadAheadPlayerAction('nextReadAheadPresentationItem','Controls','');
		showReadAheadPresentationItem(currentPosition+1);
	}

	function read_ahead_playAgain(){
		currentWordIndex = 0;
		logReadAheadPlayerAction('read_ahead_playAgain','Controls','');
		playReadAheadPresentation();
	}


	function read_ahead_minimize(){
		setMinimized = true;
		logReadAheadPlayerAction('read_ahead_minimize','Controls','');
		read_ahead_switch_min_max();
	}

	function read_ahead_maximize(){
		setMinimized = false;
		logReadAheadPlayerAction('read_ahead_maximize','Controls','');
		read_ahead_switch_min_max();
	}

	function read_ahead_switch_min_max(forceSwitch){
		forceSwitch = forceSwitch != undefined ? forceSwitch : false;
		if (forceSwitch) { setMinimized = !setMinimized; }

		if (setMinimized) {
			$('#read_ahead_player_back').fadeOut();
			$('#read_ahead_player').addClass('minimize');
			$('.player-icons .fa-stack').removeClass('fa-lg').addClass('fa-sm');
			$('.player-icons .fa-minus').removeClass('fa-minus').addClass('fa-expand');
			logReadAheadPlayerAction('read_ahead_switch_min_max','Min','');
			//$('#read_ahead_player_max_min').each(function(){
			//	$(this).off('click');
			//	$(this).attr('onclick','read_ahead_maximize()');
			//});
		} else {
			$('#read_ahead_player_back').fadeIn();
			$('#read_ahead_player').removeClass('minimize');
			$('.player-icons .fa-stack').removeClass('fa-sm').addClass('fa-lg');
			$('.player-icons .fa-expand').removeClass('fa-expand').addClass('fa-minus');
			logReadAheadPlayerAction('read_ahead_switch_min_max','Max','');
			//$('#read_ahead_player_max_min').each(function(){
			//	$(this).off('click');
			//	$(this).attr('onclick','read_ahead_minimize()');
			//});
		}

	}

	function saveReadAheadPosition(){
		$.ajax({
			type:'POST',
			url:'/ajax/save_user_presentation_position.php',
			data: { 'id':2431,
					'position': currentPosition
				}
		})
		.done(function(results){
		})
		.fail(function( jqXHR, textStatus ) {
			alert( "Request failed: " + textStatus );
		});

	}

	function logLTIEndPresentation(action) {
		if (!logToLTI) {
			return;
		}

		$.ajax({
			type:'POST',
			url:'/lti/presentationEnded.php',
			data: { 'documentId':2431,
					'userId':0,
				}
		})
	}

	function logReadAheadPlayerAction(action,area,details){
		var d = new Date();
		var t = d.getTime();
		action = action != undefined ? action.trim() : 'UNKNOWN';
		area = area != undefined ? area.trim() : '';
		details = details != undefined ? details : '';

		// If we are about to show a new word, increase the number of keywords
		// reinforced so we can log that for the Dashboard page.
		if (area == 'Word') {
			window.keywordCount++;
		}

		$.ajax({
			type:'POST',
			url:'/logging/logPlayerAction.php',
			data: { 'documentId':2431,
					'userId':0,
					'playerAction':action,
					'playerArea':area,
					'details':details,
					'timestamp': t
				}
		})
		.done(function(results){
		})
		.fail(function( jqXHR, textStatus ) {
			alert( "Request failed: " + textStatus );
		});

	}