define([
	"sugar-web/activity/activity",
	"activity/palettes/format-text-palette",
	"activity/palettes/list-palette",
	"activity/palettes/paragraph-palette",
	"activity/palettes/font-palette",
	"sugar-web/graphics/colorpalette",
	"sugar-web/datastore",
	"sugar-web/graphics/journalchooser",
	"sugar-web/env",
	"sugar-web/graphics/presencepalette",
	"activity/palettes/export-palette",
	"webL10n",
], function (activity,formatpalette,listpalette,parapalette,fontPalette,colorpalette , datastore , journalchooser,env,presencepalette,exportpalette,webL10n) {

	// Manipulate the DOM only when it is ready.
	requirejs(['domReady!','humane'], function (doc,humane) {

		// Initialize the activity.
		activity.setup();

		var options = {
			modules: {
			  toolbar: '#main-toolbar',
			  history: {
				maxStack: 500,
			  },
			  imageResize: {},
			  cursors: {
				transformOnTextChange: true,
			  },
			  clipboard: true
			},
		};
		Quill.register('modules/cursors', QuillCursors);
		var container = document.getElementById('editor');
		var editor = new Quill(container,options);
		editor.focus();
		editor.format('size','24px');
		const cursors = editor.getModule('cursors');
		const Delta =  Quill.import('delta');
		// Journal Handling (Load)
		env.getEnvironment(function(err, environment) {

			currentenv = environment;
			// Language Settings
			var defaultLanguage = (typeof chrome != 'undefined' && chrome.app && chrome.app.runtime) ? chrome.i18n.getUILanguage() : navigator.language;
			var language = environment.user ? environment.user.language : defaultLanguage;
			webL10n.language.code = language;
			window.addEventListener("localized", function() {
				document.getElementById("network-button").title = webL10n.get("Network");
				document.getElementById("color-button-1").title = webL10n.get("ForegroundColor");
				document.getElementById("color-button-2").title = webL10n.get("BackgroundColor");
				document.getElementById("format-text").title = webL10n.get("Formattext");
				document.getElementById("paragraph").title = webL10n.get("Paragraph");
				document.getElementById("list").title = webL10n.get("List");
				document.getElementById("resize-inc").title = webL10n.get("Increasefontsize");
				document.getElementById("font-button").title = webL10n.get("ChooseFont");
				document.getElementById("resize-dec").title = webL10n.get("Decreasefontsize");
				document.getElementById("insert-picture").title = webL10n.get("Image");
				document.getElementById("edit-undo").title = webL10n.get("Undo");
				document.getElementById("edit-redo").title = webL10n.get("Redo");
				document.getElementById("edit-copy").title = webL10n.get("Copy");
				document.getElementById("edit-paste").title = webL10n.get("Paste");
				document.getElementById("export").title = webL10n.get("Export");
				document.getElementById(5).title = webL10n.get("Bold");
				document.getElementById(6).title = webL10n.get("Italic");
				document.getElementById(7).title = webL10n.get("Underline");
				document.getElementById(8).title = webL10n.get("Strike");
				document.getElementById(9).title = webL10n.get("OrderedList");
				document.getElementById(10).title = webL10n.get("UnorderedList");
				document.getElementById(11).title = webL10n.get("JustifyLeft");
				document.getElementById(12).title = webL10n.get("JustifyRight");
				document.getElementById(13).title = webL10n.get("JustifyCenter");
				document.getElementById(19).title = webL10n.get("ExportToTxt");
				document.getElementById(20).title = webL10n.get("ExportToPdf");
				document.getElementById(21).title = webL10n.get("ExportToDoc");
				document.getElementById(22).title = webL10n.get("ExportToOdt");
			});

			if (!environment.objectId && !environment.sharedId) {
				// New instance
				// Intentionally added setTimeout to allow locale.ini file to be loaded
				setTimeout(function(){
					editor.setContents([
						{insert:  webL10n.get('Welcome',{username: environment.user.name}) + '\n' , attributes: { size: "40px" , color : environment.user.colorvalue.stroke , bold: true }},
					]);
					var length = editor.getLength();
					editor.clipboard.dangerouslyPasteHTML(length,webL10n.get('Write'));
					length = editor.getLength();
					editor.clipboard.dangerouslyPasteHTML(length,webL10n.get('Writefeatures'));
					length = editor.getLength();
					editor.clipboard.dangerouslyPasteHTML(length,webL10n.get('Enjoy'));
					length = editor.getLength();
					editor.clipboard.dangerouslyPasteHTML(length,"<br></br>");
					length = editor.getLength();
					editor.updateContents(
						new Delta()
						.retain(editor.getSelection().index+1)
						.insert({
							image: window.initialImageDataUrl
							})
					);
				},200);
			} else {
				// Existing instance
				activity.getDatastoreObject().loadAsText(function(error, metadata, data) {
					if (error==null && data!=null) {
						var delta = JSON.parse(data);
						console.log(delta);
						editor.setContents(delta);
					}
				});
			}
			// Shared instances
			if (environment.sharedId) {
				console.log("Shared instance");

				// Hide GUI of undo and redo for non host users
				document.getElementById("edit-undo").style.display = "none";
				document.getElementById("edit-redo").style.display = "none";
				document.getElementById("shared-button").click();
				presence = activity.getPresenceObject(function(error, network) {
					network.onDataReceived(onNetworkDataReceived);
					network.onSharedActivityUserChanged(onNetworkUserChanged);
				});
			}

		});

		// Save in Journal on Stop
		document.getElementById("stop-button").addEventListener('click', function (event) {

			// Journal handling
			var data = editor.getContents();
			var jsondata = JSON.stringify(data);
			activity.getDatastoreObject().setDataAsText(jsondata);
			activity.getDatastoreObject().save(function (error) {
				if (error === null) {
					console.log("write done.");
				} else {
					console.log("write failed.");
				}
			});

		});

		var changeMadebyUser=false;

		var copiedContent = null ;

		document.getElementById("edit-copy").addEventListener('click',function(){
			var range = editor.getSelection();
			copiedContent = editor.getContents(range.index,range.length);
			document.execCommand('copy');
		});
		document.getElementById("edit-paste").addEventListener('click',function(){
			if(document.execCommand('paste')){
				// Your browser supports execCommand('paste')
			} else if(copiedContent!=null) {
					// Your browser does not support execCommand('paste')
					changeMadebyUser=true;
					editor.updateContents(
						new Delta()
						.retain(editor.getSelection().index)
						.concat(copiedContent)
					);
			}
		});

		// Sync Keyboard Shortcut of copy with custom events
		editor.keyboard.addBinding({ key: 'C', shortKey: true }, function(){document.getElementById("edit-copy").click()});

		document.getElementById("edit-undo").addEventListener('click',function(){
			editor.history.undo();
		});
		document.getElementById("edit-redo").addEventListener('click',function(){
			editor.history.redo();
		});

		// Initiating format-text-palette ( for cut/copy/undo/redo )
		var formatButton = document.getElementById("format-text");
		var formatoptions = [
			{"id": 5, "title": "bold", "cmd":"bold"},
			{"id": 6, "title": "italic", "cmd":"italic"},
			{"id": 7, "title": "underline", "cmd":"underline"},
			{"id": 8, "title": "strike", "cmd":"strikeThrough"}
		];
		formatpalette = new formatpalette.Formatpalette(formatButton, undefined);
		formatpalette.setCategories(formatoptions);
		formatpalette.addEventListener('format', function () {
			formatpalette.popDown();
			editor.focus();
		});
		document.getElementById(5).addEventListener('click',function(){
			document.getElementById("bold").click();
		});
		document.getElementById(6).addEventListener('click',function(){
			document.getElementById("italic").click();
		});
		document.getElementById(7).addEventListener('click',function(){
			document.getElementById("underline").click();
		});
		document.getElementById(8).addEventListener('click',function(){
			document.getElementById("strike").click();
		});


		// Initiating lists palette
		var listButton = document.getElementById("list");
		var listoptions = [
			{"id": 10, "title": "unordered list", "cmd":"insertUnorderedList"},
			{"id": 9, "title": "ordered list", "cmd":"insertorderedList"},
		];
		listpalette = new listpalette.Listpalette(listButton, undefined);
		listpalette.setCategories(listoptions);
		listpalette.addEventListener('list', function () {
			listpalette.popDown();
		});
		document.getElementById("9").addEventListener("click",function(){
			document.getElementById("list-ordered").click();
		});
		document.getElementById("10").addEventListener("click",function(){
			document.getElementById("list-unordered").click();
		});

		// Initiating paragraph palette ( Alignment settings )

		var paraButton = document.getElementById("paragraph");
		var paraoptions = [
			{"id": 11, "title":"justify Left" , "cmd":"justifyLeft"},
			{"id": 13, "title":"justify Center" , "cmd":"justifyCenter"},
			{"id": 12, "title":"justify Right" , "cmd":"justifyRight"},
		];
		parapalette = new parapalette.Parapalette(paraButton, undefined);
		parapalette.setCategories(paraoptions);
		parapalette.addEventListener('para', function () {
			parapalette.popDown();
			editor.focus();
		});

		document.getElementById(11).addEventListener("click",function(){
			changeMadebyUser=true;
			editor.format('align','justify');
		})
		document.getElementById(12).addEventListener("click",function(){
			changeMadebyUser=true;
			editor.format('align','right');
		});
		document.getElementById(13).addEventListener("click",function(){
			changeMadebyUser=true;
			editor.format('align','center');
		});

		// Initialise font palette
		var fontButton = document.getElementById("font-button");
		fontPalette = new fontPalette.Fontpalette(fontButton);
		fontPalette.addEventListener('fontChange', function(e) {
			var newfont = e.detail.family;
			if(newfont=="Arial") newfont="arial";
			if(newfont=="Comic Sans MS") newfont="comic";
			changeMadebyUser=true;
			editor.format('font',newfont);
		});

		// Initiating colour palette for foreground and background
		var forecolorButton = document.getElementById("color-button-1");
		var changeForeColorPalette = new colorpalette.ColorPalette(forecolorButton);
		changeForeColorPalette.setColor('rgb(0, 0, 0)');
		changeForeColorPalette.addEventListener('colorChange', function(e) {
			changeMadebyUser=true;
			editor.format('color',e.detail.color);
		});

		var backcolorButton = document.getElementById("color-button-2");
		var changeBackColorPalette = new colorpalette.ColorPalette(backcolorButton);
		changeBackColorPalette.setColor('rgb(255,255,255)');
		changeBackColorPalette.addEventListener('colorChange', function(e) {
			changeMadebyUser=true;
			editor.format('background-color',e.detail.color);
		});


		// Initiating font-size-palette
		// For increase
		var sizes = ['16px', '24px', '32px' ,'40px', '48px' , '56px', '64px' , '72px' , '80px' , '100px'];
		var sizeIncButton = document.getElementById("resize-inc");
		sizeIncButton.addEventListener("click",function(){
			var currentSize = editor.getFormat();
			if(currentSize.size==null){
				var index = sizes.indexOf('24px');
				editor.format('size',sizes[index+1]);
			}
			else {
				var index = sizes.indexOf(currentSize.size);
				index++;
				if(index<sizes.length){
					editor.format('size',sizes[index]);
				}
			}
		});
		// For decrease
		var sizeDecButton = document.getElementById("resize-dec");
		sizeDecButton.addEventListener("click",function(){
			var currentSize = editor.getFormat();
			if(currentSize.size==null){
				var index = sizes.indexOf('24px');
				if(index>0)
				editor.format('size',sizes[index-1]);
			}
			else {
				var index = sizes.indexOf(currentSize.size);
				index--;
				if(index>=0){
					editor.format('size',sizes[index]);
				}
			}
		});

		// Insert Image handling
		document.getElementById("insert-picture").addEventListener("click",function(e){
			journalchooser.show(function (entry) {
				if (!entry) {
					return;
				}
				var dataentry = new datastore.DatastoreObject(entry.objectId);
				dataentry.loadAsText(function (err, metadata, data) {
					editor.focus();
					changeMadebyUser=true;
					editor.updateContents(
						new Delta()
						.retain(editor.getSelection().index)
						.insert({
							image: data
							})
					);
				});
			}, { mimetype: 'image/png' }, { mimetype: 'image/jpeg' });
		});


		// Initiating export-palette

		var exportButton = document.getElementById("export");
		var options = [
			{"id": 19, "title": "export to txt" , "cmd":"save-as-txt"},
			{"id": 20, "title": "export to pdf", "cmd":"save-as-pdf"},
			{"id": 21, "title": "export to doc", "cmd":"doc"},
			{"id": 22, "title": "export to odt", "cmd":"odt"},
		];
		exportpalette = new exportpalette.Exportpalette(exportButton, undefined);
		exportpalette.setCategories(options);
		exportpalette.addEventListener('export', function () {
			exportpalette.popDown();
		});

		// save as txt
		document.getElementById("19").addEventListener('click',function(){
			var title = document.getElementById("title").value;
			var mimetype = 'text/plain';
			var inputData = document.getElementById("editor").textContent;
			inputData=JSON.stringify(inputData);
			var metadata = {
			mimetype: mimetype,
			title: title+".txt",
			activity: "",
			timestamp: new Date().getTime(),
			creation_time: new Date().getTime(),
			file_size: 0
		};
		datastore.create(metadata, function() {
			console.log("export done.");
			humane.log(webL10n.get("Txt"));
		}, inputData);
		});

		// save as PDF
		document.getElementById("20").addEventListener('click',function(){

			var title = document.getElementById("title").value;
			editor.scrollingContainer.style.overflowY = 'visible';
			console.log(editor.scrollingContainer.style.height);
			var h = editor.scrollingContainer.offsetHeight;
			editor.scrollingContainer.style.height="auto";
			editor.scrollingContainer.scrollTop=0;
			html2canvas(editor.scrollingContainer).then(function(canvas){
				editor.scrollingContainer.style.height=h;
				editor.scrollingContainer.style.overflowY = 'auto';
				var imgData = canvas.toDataURL('image/png');
				var imgData = canvas.toDataURL('image/png');
				var imgWidth = 210;
				var pageHeight = 295;
				var imgHeight = canvas.height * imgWidth / canvas.width;
				var heightLeft = imgHeight;

				var doc = new jsPDF('p', 'mm' , '',true);
				var position = 0;

				doc.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight , '' , 'FAST');
				heightLeft -= pageHeight;
				while (heightLeft >= 0) {
				position = heightLeft - imgHeight;
				doc.addPage();
				doc.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight , '' , 'FAST');
				heightLeft -= pageHeight;
				}
				var inputData = doc.output('dataurlstring');
				var mimetype = 'application/pdf';
				var metadata = {
					mimetype: mimetype,
					title: title+".pdf",
					activity: "",
					timestamp: new Date().getTime(),
					creation_time: new Date().getTime(),
					file_size: 0
				};
				datastore.create(metadata, function() {
					console.log("export done.");
					humane.log(webL10n.get("Pdf"));
				}, inputData);
			});
		});

		// Save as doc
		document.getElementById(21).addEventListener("click",function(){
			var title = document.getElementById("title").value;
			var content =document.getElementById("editor").innerHTML;
			var header = "<html xmlns:o='urn:schemas-microsoft-com:office:office' "+
			"xmlns:w='urn:schemas-microsoft-com:office:word' "+
			"xmlns='http://www.w3.org/TR/REC-html40'>"+
			"<head><meta charset='utf-8'></head><body>";
			var footer = "</body></html>";
			var sourceHTML = header+content+footer;
			var inputData = 'data:application/vnd.ms-word;charset=utf-8;base64,' + btoa(unescape(encodeURIComponent( sourceHTML )));
			var mimetype = 'application/msword';
			var metadata = {
				mimetype: mimetype,
				title: title+".doc",
				activity: "",
				timestamp: new Date().getTime(),
				creation_time: new Date().getTime(),
				file_size: 0
			};
			datastore.create(metadata, function() {
				console.log("export done.");
				humane.log(webL10n.get("Doc"));
			}, inputData);
		});

		//Save as odt
		document.getElementById("22").addEventListener("click",function(){
			// resetXML();
			var data = document.getElementsByClassName("ql-editor");
			var xml = traverse(data[0]);
			var mimetype = 'application/vnd.oasis.opendocument.text';
			var title = document.getElementById("title").value;
			var inputData = 'data:application/vnd.oasis.opendocument.text;charset=utf-8;base64,' + btoa(unescape(encodeURIComponent( xml )));
			var metadata = {
				mimetype: mimetype,
				title: title+".odt",
				activity: "",
				timestamp: new Date().getTime(),
				creation_time: new Date().getTime(),
				file_size: 0
			};
			datastore.create(metadata, function() {
				console.log("export done.");
				humane.log(webL10n.get("Odt"));
				resetXML();
			}, inputData);

		});

		// On content change handlers , sends data to other users on content being changed

		editor.on('text-change', function(delta, oldDelta, source) {
			// Executes on text or formatting changes
			if ((source == 'user' || changeMadebyUser==true) && presence!=null) {
				var range = editor.getSelection();
				presence.sendMessage(presence.getSharedInfo().id, {
					user: presence.getUserInfo(),
					content: {
						action: 'typing',
						data: delta,
						range: range
					}
				});
				changeMadebyUser=false;
			}

		});

		editor.on('selection-change', function(range, oldRange, source) {
			// Executes when user selection changes
			if (range) {
				if (presence!=null) {
				presence.sendMessage(presence.getSharedInfo().id, {
					user: presence.getUserInfo(),
					content: {
						action: 'selection',
						range: range
					}
				});
				}
			}
		});

		// Presence Palette
		// Link presence palette
		var presence = null;
		var isHost = false;
		var myid;
		var nomoreinit = false;
		var mycursor;
		var palette = new presencepalette.PresencePalette(document.getElementById("network-button"), undefined);
		palette.addEventListener('shared', function() {
			palette.popDown();
			console.log("Want to share");
			presence = activity.getPresenceObject(function(error, network) {
				if (error) {
					console.log("Sharing error");
					return;
				}
				network.createSharedActivity('org.sugarlabs.Write', function(groupId) {
					console.log("Activity shared");
					isHost = true;
				});
				network.onDataReceived(onNetworkDataReceived);
				network.onSharedActivityUserChanged(onNetworkUserChanged);
			});
		});

		var onNetworkDataReceived = function(msg) {
			if (presence.getUserInfo().networkId === msg.user.networkId) {
				return;
			}
			if(msg.content.action=='init' && nomoreinit==false){
				editor.updateContents(msg.content.data);
				var getallcursors = msg.content.allcursors;
				for(var i = 0 ; i < getallcursors.length ; i++){
					console.log(getallcursors[i]);
					if(getallcursors[i].id!=myid){
						cursors.createCursor(getallcursors[i].id, getallcursors[i].name,getallcursors[i].color) ;
						cursors.moveCursor(getallcursors[i].id, getallcursors[i].range) ;
					}
				}
				cursors.update();
				// Create Fake event to init Cursors
				document.getElementById("list-ordered").click();
				document.getElementById("list-ordered").click();
				nomoreinit=true;
			}
			if(msg.content.action=='typing'){
				editor.updateContents(msg.content.data);
			}
			if(msg.content.action=='selection'){
				setTimeout(function() {cursors.moveCursor(msg.user.networkId,msg.content.range)} , 5);
			}

		};

		var onNetworkUserChanged = function(msg) {
			if (isHost) {
				var data = editor.getContents();
				var range = editor.getSelection();
				mycursor.range = range;
				var allcursors = cursors.cursors();
				presence.sendMessage(presence.getSharedInfo().id, {
					user: presence.getUserInfo(),
					content: {
						action: 'init',
						data: data,
						allcursors: allcursors
					}
				});
				mycursor.range = null;
			}
			if(!myid){
				myid = msg.user.networkId;
			}
			// handle user enter/exit Notifications
			var userName = msg.user.name.replace('<', '&lt;').replace('>', '&gt;');
			var html = "<img style='height:30px;' src='" + generateXOLogoWithColor(msg.user.colorvalue) + "'>";
			presence.listSharedActivities(function(activities){
				for (var i = 0; i < activities.length; i++) {
					if (activities[i].id === presence.getSharedInfo().id) {
						getConnectedPeople(activities[i].users);
					}
					}
			});
			for (var key in connectedPeople) {
				console.log(connectedPeople[key].name,key,connectedPeople[key].networkId);
			}
			if(msg.move==1){
				humane.log(html + webL10n.get("PlayerJoin",{user: userName}));
				var c = cursors.createCursor(msg.user.networkId, userName, msg.user.colorvalue.stroke);
				if(myid==msg.user.networkId) {mycursor=c;}
			}
			if (msg.move === -1) {
				cursors.removeCursor(msg.user.networkId);
				humane.log(html + webL10n.get("PlayerLeave",{user: userName}));
				if(msg.user.networkId == connectedPeople[0].networkId){
					if(connectedPeople[1].networkId == myid){
						document.getElementById(3).style.display = "inline";
						document.getElementById(4).style.display = "inline";
						isHost=true;
					}
				}
			}
		};


		var xoLogo = '<?xml version="1.0" ?><!DOCTYPE svg  PUBLIC \'-//W3C//DTD SVG 1.1//EN\'  \'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\' [<!ENTITY stroke_color "#010101"><!ENTITY fill_color "#FFFFFF">]><svg enable-background="new 0 0 55 55" height="55px" version="1.1" viewBox="0 0 55 55" width="55px" x="0px" xml:space="preserve" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" y="0px"><g display="block" id="stock-xo_1_"><path d="M33.233,35.1l10.102,10.1c0.752,0.75,1.217,1.783,1.217,2.932   c0,2.287-1.855,4.143-4.146,4.143c-1.145,0-2.178-0.463-2.932-1.211L27.372,40.961l-10.1,10.1c-0.75,0.75-1.787,1.211-2.934,1.211   c-2.284,0-4.143-1.854-4.143-4.141c0-1.146,0.465-2.184,1.212-2.934l10.104-10.102L11.409,24.995   c-0.747-0.748-1.212-1.785-1.212-2.93c0-2.289,1.854-4.146,4.146-4.146c1.143,0,2.18,0.465,2.93,1.214l10.099,10.102l10.102-10.103   c0.754-0.749,1.787-1.214,2.934-1.214c2.289,0,4.146,1.856,4.146,4.145c0,1.146-0.467,2.18-1.217,2.932L33.233,35.1z" fill="&fill_color;" stroke="&stroke_color;" stroke-width="3.5"/><circle cx="27.371" cy="10.849" fill="&fill_color;" r="8.122" stroke="&stroke_color;" stroke-width="3.5"/></g></svg>';
		function generateXOLogoWithColor(color) {
			var coloredLogo = xoLogo;
			coloredLogo = coloredLogo.replace("#010101", color.stroke)
			coloredLogo = coloredLogo.replace("#FFFFFF", color.fill)

			return "data:image/svg+xml;base64," + btoa(coloredLogo);
		}

		var connectedPeople = {};
		// Maintain a list of connected users
		function displayConnectedPeople(){
			var presenceUsersDiv = document.getElementById("presence-users");
			var html = "<hr><ul style='list-style: none; padding:0;'>";
			for (var key in connectedPeople) {
				html += "<li><img style='height:30px;' src='" + generateXOLogoWithColor(connectedPeople[key].colorvalue) + "'>" + connectedPeople[key].name + "</li>"
			}
				html += "</ul>"
				presenceUsersDiv.innerHTML = html
		}

		function getConnectedPeople(users){
			var presenceUsersDiv = document.getElementById("presence-users");
			if (!users || !presenceUsersDiv) {
			return;
			}
			connectedPeople = {};
			presence.listSharedActivityUsers(presence.getSharedInfo().id , function(usersConnected){
				connectedPeople = {};
				for (var i = 0; i < usersConnected.length; i++) {
					var userConnected = usersConnected[i];
					connectedPeople[i] = userConnected;
				}
				displayConnectedPeople();
			});
		}

	});

});