var presentation = ["<word>March Hare and the Hatter<\/word>","<word>Dormouse<\/word>","<word>fast asleep<\/word>","<word>crowded together<\/word>","<word>indignantly<\/word>","<word>arm-chair<\/word>","<phrase>There was a table set out under a tree in front of the house, and the <strong data-readahead=\"March Hare and the Hatter\" class=\"presentation_word\">March Hare and the Hatter<\/strong> were having tea at it; a <strong data-readahead=\"Dormouse\" class=\"presentation_word\">Dormouse<\/strong> was sitting between them, <strong data-readahead=\"fast asleep\" class=\"presentation_word\">fast asleep<\/strong>.\nThe table was a large one, but the three were all <strong data-readahead=\"crowded together\" class=\"presentation_word\">crowded together<\/strong> at one corner of it. \"No room! No room!\" they cried out when they saw Alice coming. \"There's plenty of room!\" said Alice <strong data-readahead=\"indignantly\" class=\"presentation_word\">indignantly<\/strong>, and she sat down in a large <strong data-readahead=\"arm-chair\" class=\"presentation_word\">arm-chair<\/strong> at one end of the table.<\/phrase>","<word>Why is a raven like a writing-desk?<\/word>","<word>riddles<\/word>","<word>aloud<\/word>","<word>Exactly<\/word>","<word>hastily<\/word>","<phrase>The Hatter opened his eyes very wide on hearing this, but all he said was \"<strong data-readahead=\"Why is a raven like a writing-desk?\" class=\"presentation_word\">Why is a raven like a writing-desk?<\/strong>\"\n\"I'm glad they've begun asking <strong data-readahead=\"riddles\" class=\"presentation_word\">riddles<\/strong>-I believe I can guess that,\" she added <strong data-readahead=\"aloud\" class=\"presentation_word\">aloud<\/strong>.\n\"Do you mean that you think you can find out the answer to it?\" said the March Hare.\n\"<strong data-readahead=\"Exactly\" class=\"presentation_word\">Exactly<\/strong> so,\" said Alice.\n\"Then you should say what you mean,\" the March Hare went on.\n\"I do,\" Alice <strong data-readahead=\"hastily\" class=\"presentation_word\">hastily<\/strong> replied; \"at least at least I mean what I say that's the same thing, you know.\"<\/phrase>","<word>Dormouse<\/word>","<word>poured<\/word>","<word>impatiently<\/word>","<word>remark<\/word>","<phrase>\"You might just as well say,\" added the <strong data-readahead=\"Dormouse\" class=\"presentation_word\">Dormouse<\/strong>, which seemed to be talking in its sleep, \"that 'I breathe when I sleep' is the same thing as 'I sleep when I breathe!'\"\n\"It is the same thing with you,\" said the Hatter, and he <strong data-readahead=\"poured\" class=\"presentation_word\">poured<\/strong> a little hot tea upon its nose. The <strong data-readahead=\"Dormouse\">Dormouse<\/strong> shook its head <strong data-readahead=\"impatiently\" class=\"presentation_word\">impatiently<\/strong> and said, without opening its eyes, \"Of course, of course; just what I was going to <strong data-readahead=\"remark\" class=\"presentation_word\">remark<\/strong> myself.\"<\/phrase>","<word>guessed<\/word>","<word>haven't the slightest idea<\/word>","<word>weary sigh<\/word>","<word>do something better with the time<\/word>","<word>riddles<\/word>","<phrase>\"Have you <strong data-readahead=\"guessed\" class=\"presentation_word\">guessed<\/strong> the riddle yet?\" the Hatter said, turning to Alice again.\n\"No, I give it up,\" Alice replied. \"What's the answer?\"\n\"I <strong data-readahead=\"haven't the slightest idea\" class=\"presentation_word\">haven't the slightest idea<\/strong>,\" said the Hatter.\n\"Nor I,\" said the March Hare.\nAlice gave a <strong data-readahead=\"weary sigh\" class=\"presentation_word\">weary sigh<\/strong>. \"I think you might <strong data-readahead=\"do something better with the time\" class=\"presentation_word\">do something better with the time<\/strong>,\" she said, \"than wasting it in asking <strong data-readahead=\"riddles\" class=\"presentation_word\">riddles<\/strong> that have no answers.\"<\/phrase>","<word>earnestly<\/word>","<word>offended tone<\/word>","<word>can't take less<\/word>","<word>got up and walked off<\/word>","<word>Dormouse<\/word>","<word>instantly<\/word>","<phrase>\"Take some more tea,\" the March Hare said to Alice, very <strong data-readahead=\"earnestly\" class=\"presentation_word\">earnestly<\/strong>.\n\"I've had nothing yet,\" Alice replied in an <strong data-readahead=\"offended tone\" class=\"presentation_word\">offended tone<\/strong>, \"so I can't take more.\"\n\"You mean you <strong data-readahead=\"can't take less\" class=\"presentation_word\">can't take less<\/strong>,\" said the Hatter; \"it's very easy to take more than nothing.\"\nAt this, Alice <strong data-readahead=\"got up and walked off\" class=\"presentation_word\">got up and walked off<\/strong>. The <strong data-readahead=\"Dormouse\" class=\"presentation_word\">Dormouse<\/strong> fell asleep <strong data-readahead=\"instantly\" class=\"presentation_word\">instantly<\/strong> and neither of the others took the least notice of her going, though she looked back once or twice; the last time she saw them, they were trying to put the <strong data-readahead=\"Dormouse\">Dormouse<\/strong> into the tea-pot.<\/phrase>","<word>picked her way<\/word>","<word>stupidest tea-party<\/word>","<word>noticed<\/word>","<word>leading<\/word>","<word>curious<\/word>","<phrase>\"At any rate, I'll never go there again!\" said Alice, as she <strong data-readahead=\"picked her way\" class=\"presentation_word\">picked her way<\/strong> through the wood. \"It's the <strong data-readahead=\"stupidest tea-party\" class=\"presentation_word\">stupidest tea-party<\/strong> I ever was at in all my life!\" Just as she said this, she <strong data-readahead=\"noticed\" class=\"presentation_word\">noticed<\/strong> that one of the trees had a door <strong data-readahead=\"leading\" class=\"presentation_word\">leading<\/strong> right into it. \"That's very <strong data-readahead=\"curious\" class=\"presentation_word\">curious<\/strong>!\" she thought. \"I think I may as well go in at once.\" And in she went.<\/phrase>","<word>long hall<\/word>","<word>little glass table<\/word>","<word>little golden key<\/word>","<word>nibbling<\/word>","<word>mushroom<\/word>","<word>a foot high<\/word>","<word>beautiful garden<\/word>","<word>bright flower-beds<\/word>","<word>cool fountains<\/word>","<phrase>Once more she found herself in the <strong data-readahead=\"long hall\" class=\"presentation_word\">long hall<\/strong> and close to the <strong data-readahead=\"little glass table\" class=\"presentation_word\">little glass table<\/strong>. Taking the <strong data-readahead=\"little golden key\" class=\"presentation_word\">little golden key<\/strong>, she unlocked the door that led into the garden. Then she set to work <strong data-readahead=\"nibbling\" class=\"presentation_word\">nibbling<\/strong> at the <strong data-readahead=\"mushroom\" class=\"presentation_word\">mushroom<\/strong> (she had kept a piece of it in her pocket) till she was about <strong data-readahead=\"a foot high\" class=\"presentation_word\">a foot high<\/strong>; then she walked down the little passage; and then she found herself at last in the <strong data-readahead=\"beautiful garden\" class=\"presentation_word\">beautiful garden<\/strong>, among the <strong data-readahead=\"bright flower-beds\" class=\"presentation_word\">bright flower-beds<\/strong> and the <strong data-readahead=\"cool fountains\" class=\"presentation_word\">cool fountains<\/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:
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				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':2290,
					'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':2290,
					'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':2290,
					'userId':0,
					'playerAction':action,
					'playerArea':area,
					'details':details,
					'timestamp': t
				}
		})
		.done(function(results){
		})
		.fail(function( jqXHR, textStatus ) {
			alert( "Request failed: " + textStatus );
		});

	}