###
# be.bastelstu.WCF.Chat
# 
# @author	Tim Düsterhus
# @copyright	2010-2012 Tim Düsterhus
# @license	Creative Commons Attribution-NonCommercial-ShareAlike <http://creativecommons.org/licenses/by-nc-sa/3.0/legalcode>
# @package	be.bastelstu.wcf.chat
###

window.console ?= 
	log: () ->,
	warn: () ->,
	error: () ->
(($, window, windowConsole) ->
	window.be ?= {}
	be.bastelstu ?= {}
	be.bastelstu.WCF ?= {}
	
	console =
		log: (message) ->
			windowConsole.log '[be.bastelstu.WCF.Chat] '+message
		warn: (message) ->
			windowConsole.warn '[be.bastelstu.WCF.Chat] '+message
		error: (message) ->
			windowConsole.error '[be.bastelstu.WCF.Chat] '+message
		
	
	be.bastelstu.WCF.Chat =
		# Tims Chat stops loading when this reaches zero
		# TODO: We need an explosion animation
		shields: 3
		
		# Are we currently loading messages?
		loading: false
		
		# Templates
		titleTemplate: null
		messageTemplate: null
		
		# Notifications
		newMessageCount: null
		isActive: true
		
		# Autocompleter
		autocompleteOffset: 0
		autocompleteValue: null
		
		# Autoscroll
		oldScrollTop: null
		
		# Events
		events: 
			newMessage: $.Callbacks()
			userMenu: $.Callbacks()
			
		# socket.io
		socket: null
		
		pe:
			getMessages: null
			refreshRoomList: null
			fish: null
		init: () ->
			console.log 'Initializing'
			@bindEvents()
			@events.newMessage.add $.proxy @notify, @
			
			@pe.refreshRoomList = new WCF.PeriodicalExecuter $.proxy(@refreshRoomList, @), 60e3
			@pe.getMessages = new WCF.PeriodicalExecuter $.proxy(@getMessages, @), @config.reloadTime * 1e3
			@refreshRoomList()
			@getMessages()
			@initPush()
			
			console.log 'Finished initializing - Shields at 104 percent'
		###
		# Autocompletes a username
		###
		autocomplete: (firstChars, offset = @autocompleteOffset) ->
			users = []
			
			# Search all matching users
			for user in $ '.timsChatUser'
				username = $(user).data 'username'
				if username.indexOf(firstChars) is 0
					users.push username
			
			# None found -> return firstChars
			# otherwise return the user at the current offset
			return if users.length is 0 then firstChars else users[offset % users.length] + ', '
		###
		# Binds all the events needed for Tims Chat.
		###
		bindEvents: () ->
			# Mark window as focused
			$(window).focus $.proxy () ->
				document.title = @titleTemplate.fetch
					title: $('#timsChatRoomList .activeMenuItem a').text()
				@newMessageCount = 0
				@isActive = true
			, @
			
			# Mark window as blurred
			$(window).blur $.proxy () ->
				@isActive = false
			, @
			
			# Unload the chat
			window.onbeforeunload = $.proxy () ->
				@unload()
				return undefined
			, @
			
			# Insert a smiley
			$('.jsSmiley').click $.proxy (event) ->
				@insertText ' ' + $(event.target).attr('alt') + ' '
			, @
			
			# Switch sidebar tab
			$('.timsChatSidebarTabs li').click $.proxy (event) ->
				event.preventDefault()
				@toggleSidebarContents $ event.target
			, @
			
			# Submit Handler
			$('#timsChatForm').submit $.proxy (event) ->
				event.preventDefault()
				@submit $ event.target
			, @
			
			# Autocompleter
			$('#timsChatInput').keydown $.proxy (event) ->
				# tab key
				if event.keyCode is 9
					event.preventDefault()
					if @autocompleteValue is null
						@autocompleteValue = $('#timsChatInput').val()
					
					firstChars = @autocompleteValue.substring(@autocompleteValue.lastIndexOf(' ')+1)
					
					console.log 'Autocompleting "' + firstChars + '"'
					return if firstChars.length is 0
					
					# Insert name and increment offset
					$('#timsChatInput').val(@autocompleteValue.substring(0, @autocompleteValue.lastIndexOf(' ') + 1) + @autocomplete(firstChars))
					@autocompleteOffset++
				else
					@autocompleteOffset = 0
					@autocompleteValue = null
			, @
			
			# Refreshes the roomlist
			$('#timsChatRoomList button').click $.proxy(@refreshRoomList, @)
			
			# Clears the stream
			$('#timsChatClear').click (event) ->
				event.preventDefault()
				$('.timsChatMessage').remove()
				@oldScrollTop = null
				$('.timsChatMessageContainer').scrollTop $('.timsChatMessageContainer ul').height()
				$('#timsChatInput').focus()
			
			# Toggle Buttons
			$('.timsChatToggle').click (event) ->
				element = $ @
				icon = element.find 'img'
				if element.data('status') is 1
					element.data 'status', 0
					icon.attr 'src', icon.attr('src').replace /enabled(\d?).([a-z]{3})$/, 'disabled$1.$2'
					element.attr 'title', element.data 'enableMessage'
				else
					element.data 'status', 1
					icon.attr 'src', icon.attr('src').replace /disabled(\d?).([a-z]{3})$/, 'enabled$1.$2'
					element.attr 'title', element.data 'disableMessage'
			
			# Enable fullscreen-mode on #main
			$('#timsChatFullscreen').click (event) ->
				if $(this).data 'status'
					main = $('#main')[0]
					if typeof main.requestFullscreen isnt 'undefined'
						main.requestFullscreen()
					else if typeof main.mozRequestFullScreen isnt 'undefined'
						main.mozRequestFullScreen()
					else if typeof main.webkitRequestFullScreen isnt 'undefined'
						main.webkitRequestFullScreen()
				else
					if typeof document.exitFullscreen isnt 'undefined'
						document.exitFullscreen()
					else if typeof document.mozCancelFullScreen isnt 'undefined'
						document.mozCancelFullScreen()
					else if typeof document.webkitCancelFullScreen isnt 'undefined'
						document.webkitCancelFullScreen()
			
			# Immediatly scroll down when activating autoscroll
			$('#timsChatAutoscroll').click (event) ->
				$(this).removeClass 'active'
				if $(this).data 'status'
					$('.timsChatMessageContainer').scrollTop $('.timsChatMessageContainer ul').height()
					@oldScrollTop = $('.timsChatMessageContainer').scrollTop()
					
			# Desktop Notifications
			unless typeof window.webkitNotifications is 'undefined'
				$('#timsChatNotify').click (event) ->
					window.webkitNotifications.requestPermission() if $(this).data 'status'
					
		###
		# Changes the chat-room.
		# 
		# @param	jQuery-object	target
		###
		changeRoom: (target) ->
			window.history.replaceState {}, '', target.attr('href')
				
			$.ajax target.attr('href'), 
				dataType: 'json'
				data: 
					ajax: 1
				type: 'POST'
				success: $.proxy((data, textStatus, jqXHR) ->
					@loading = false
					target.parent().removeClass 'ajaxLoad'
					
					# Mark as active
					$('.activeMenuItem .timsChatRoom').parent().removeClass 'activeMenuItem'
					target.parent().addClass 'activeMenuItem'
					
					# Set new topic
					if data.topic is ''
						return if $('#timsChatTopic').text().trim() is ''
						
						$('#timsChatTopic').wcfBlindOut 'vertical', () ->
							$(@).text ''
					else
						$('#timsChatTopic').text data.topic
						$('#timsChatTopic').wcfBlindIn() if $('#timsChatTopic').text().trim() isnt '' and $('#timsChatTopic').is(':hidden')
					
					$('.timsChatMessage').addClass 'unloaded', 800
					@handleMessages data.messages
					document.title = @titleTemplate.fetch data
				, @)
				error: () ->
					# Reload the page to change the room the old fashion-way
					# inclusive the error-message :)
					window.location.reload true
				beforeSend: $.proxy(() ->
					return false if target.parent().hasClass('ajaxLoad') or target.parent().hasClass 'activeMenuItem'
					
					@loading = true
					target.parent().addClass 'ajaxLoad'
				, @)
		###
		# Frees the fish
		###
		freeTheFish: () ->
			return if $.wcfIsset 'fish'
			console.warn 'Freeing the fish'
			fish = $ '<div id="fish">' + WCF.String.escapeHTML('><((((\u00B0>') + '</div>'
			fish.css
				position: 'absolute'
				top: '150px'
				left: '400px'
				color: 'black'
				textShadow: '1px 1px white'
				zIndex: 9999
			
			fish.appendTo $ 'body'
			@pe.fish = new WCF.PeriodicalExecuter(() ->
				left = Math.random() * 100 - 50
				top = Math.random() * 100 - 50
				fish = $ '#fish'
				
				left *= -1 unless fish.width() < (fish.position().left + left) < ($(document).width() - fish.width())
				top *= -1 unless fish.height() < (fish.position().top + top) < ($(document).height() - fish.height())
				
				fish.text '><((((\u00B0>' if left > 0
				fish.text '<\u00B0))))><' if left < 0
				
				fish.animate
					top: '+=' + top
					left: '+=' + left
				, 1e3
			, 1.5e3)
		###
		# Loads new messages.
		###
		getMessages: () ->
			$.ajax 'index.php/Chat/Message/',
				dataType: 'json'
				type: 'POST'
				success: $.proxy((data, textStatus, jqXHR) ->
					@loading = false
					@handleMessages(data.messages)
					@handleUsers(data.users)
				, @)
				error: $.proxy((jqXHR, textStatus, errorThrown) ->
					console.error 'Battle Station hit - shields at ' + (--@shields / 3 * 104) + ' percent'
					if @shields is 0
						@pe.refreshRoomList.stop()
						@pe.getMessages.stop()
						@freeTheFish()
						console.error 'We got destroyed, but could free our friend the fish before he was killed as well. Have a nice life in freedom!'
						alert 'herp i cannot load messages'
				, @)
				beforeSend: $.proxy(() ->
					return false if @loading
					
					@loading = true
				, @)
		###
		# Inserts the new messages.
		#
		# @param	array<object>	messages
		###
		handleMessages: (messages) ->
			# Disable scrolling automagically when user manually scrolled
			unless @oldScrollTop is null
				if $('.timsChatMessageContainer').scrollTop() < @oldScrollTop
					if $('#timsChatAutoscroll').data('status') is 1
						$('#timsChatAutoscroll').click()
						$('#timsChatAutoscroll').addClass 'active'
						$('#timsChatAutoscroll').parent().fadeOut('slow').fadeIn 'slow'
			
			# Insert the messages
			for message in messages
				continue if $.wcfIsset 'timsChatMessage' + message.messageID # Prevent problems with race condition
				@events.newMessage.fire message
				
				output = @messageTemplate.fetch message
				li = $ '<li></li>'
				li.attr 'id', 'timsChatMessage'+message.messageID
				li.addClass 'timsChatMessage timsChatMessage'+message.type
				li.addClass 'ownMessage' if message.sender is WCF.User.userID
				li.append output
				
				li.appendTo $ '.timsChatMessageContainer > ul'
				
			# Autoscroll down
			if $('#timsChatAutoscroll').data('status') is 1
				$('.timsChatMessageContainer').scrollTop $('.timsChatMessageContainer ul').height()
			@oldScrollTop = $('.timsChatMessageContainer').scrollTop()
		###
		# Builds the userlist.
		#
		# @param	array<object>	users
		###
		handleUsers: (users) ->
			foundUsers = { }
			for user in users
				id = 'timsChatUser-'+user.userID
				element = $ '#'+id
				
				# Move the user to the correct position
				if element[0]
					console.log 'Moving User: "' + user.username + '"'
					element = element.detach()
					if user.awayStatus?
						element.addClass 'timsChatAway'
						element.attr 'title', user.awayStatus
					else
						element.removeClass 'timsChatAway'
						element.removeAttr 'title'
						element.data 'tooltip', ''
					$('#timsChatUserList').append element
				# Insert the user
				else
					console.log 'Inserting User: "' + user.username + '"'
					li = $ '<li></li>'
					li.attr 'id', id
					li.addClass 'timsChatUser'
					li.addClass 'jsTooltip'
					if user.awayStatus?
						li.addClass 'timsChatAway'
						li.attr 'title', user.awayStatus
					li.data 'username', user.username
					a = $ '<a href="javascript:;">'+user.username+'</a>'
					a.click $.proxy (event) ->
						event.preventDefault()
						@toggleUserMenu $ event.target
					, @
					li.append a
					menu = $ '<ul></ul>'
					menu.addClass 'timsChatUserMenu'
					menu.append $ '<li><a href="javascript:;">' + WCF.Language.get('wcf.chat.query') + '</a></li>'
					menu.append $ '<li><a href="javascript:;">' + WCF.Language.get('wcf.chat.kick') + '</a></li>'
					menu.append $ '<li><a href="javascript:;">' + WCF.Language.get('wcf.chat.ban') + '</a></li>'
					menu.append $ '<li><a href="index.php/User/' + user.userID + '-' + encodeURI(user.username) + '/">' + WCF.Language.get('wcf.chat.profile') + '</a></li>'
					@events.userMenu.fire user, menu
					li.append menu
					li.appendTo $ '#timsChatUserList'
				
				foundUsers[id] = true
			
			# Remove users that were not found
			$('.timsChatUser').each () ->
				if typeof foundUsers[$(@).attr('id')] is 'undefined'
					console.log 'Removing User: "' + $(@).data('username') + '"'
					$(@).remove();
					
			
			$('#toggleUsers .badge').text(users.length);
		###
		# Initializes Server-Push
		###
		initPush: () ->
			if typeof window.io isnt 'undefined'
				console.log 'Initializing socket.io'
				@socket = io.connect @config.socketIOPath
				@socket.on 'connect', $.proxy((data) ->
					console.log 'Connected on socket.io'
					@pe.getMessages.stop()
				, @)
				@socket.on 'disconnect', $.proxy((data) ->
					console.log 'Losing connection to socket.io'
					@pe.getMessages = new WCF.PeriodicalExecuter $.proxy(@getMessages, @), @config.reloadTime * 1e3
				, @)
				@socket.on 'newMessage', $.proxy((data) ->
					@getMessages()
				, @)
		###
		# Inserts text into our input.
		# 
		# @param	string	text
		# @param	object	options
		###
		insertText: (text, options) ->
			options = $.extend
				append: true
				submit: false
			, options or {}
			
			text = $('#timsChatInput').val() + text if options.append
			$('#timsChatInput').val(text)
			$('#timsChatInput').keyup()
			
			if (options.submit)
				$('#timsChatForm').submit()
			else
				$('#timsChatInput').focus()
		###
		# Sends a notification about a message.
		#
		# @param	object	message
		###
		notify: (message) ->
			return if @isActive or $('#timsChatNotify').data('status') is 0
			@newMessageCount++
			
			document.title = '(' + @newMessageCount + ') ' + @titleTemplate.fetch
				 title: $('#timsChatRoomList .activeMenuItem a').text()
			
			# Desktop Notifications
			if typeof window.webkitNotifications isnt 'undefined'
				if window.webkitNotifications.checkPermission() is 0
					title = WCF.Language.get 'wcf.chat.newMessages'
					icon = WCF.Icon.get 'be.bastelstu.wcf.chat.chat'
					content = message.username + message.separator + (if message.separator is ' ' then '' else ' ') + message.message
					notification = window.webkitNotifications.createNotification icon, title, content
					notification.show()
					setTimeout(() ->
						notification.cancel()
					, 5e3)
		###
		# Refreshes the room-list.
		###
		refreshRoomList: () ->
			console.log 'Refreshing the roomlist'
			$('#toggleRooms a').addClass 'ajaxLoad'
			
			$.ajax $('#toggleRooms a').data('refreshUrl'),
				dataType: 'json'
				type: 'POST'
				success: $.proxy((data, textStatus, jqXHR) ->
					$('#timsChatRoomList li').remove()
					$('#toggleRooms a').removeClass 'ajaxLoad'
					$('#toggleRooms .badge').text data.length
					
					for room in data
						li = $ '<li></li>'
						li.addClass 'activeMenuItem' if room.active
						$('<a href="' + room.link + '">' + room.title + '</a>').addClass('timsChatRoom').appendTo li
						$('#timsChatRoomList ul').append li
						
					$('.timsChatRoom').click $.proxy (event) ->
						return if typeof window.history.replaceState is 'undefined'
						event.preventDefault()
						@changeRoom $ event.target
					, @
					
					console.log 'Found ' + data.length + ' rooms'
				, @)
		###
		# Handles submitting of messages.
		# 
		# @param	jQuery-object	target
		###
		submit: (target) ->
			# Break if input contains only whitespace
			return false if $('#timsChatInput').val().trim().length is 0
			
			# Finally free the fish
			@freeTheFish() if $('#timsChatInput').val().trim().toLowerCase() is '/free the fish'
			
			text = $('#timsChatInput').val()
			$('#timsChatInput').val('').focus().keyup()
			$.ajax $('#timsChatForm').attr('action'), 
				data:
					text: text
					smilies: $('#timsChatSmilies').data 'status'
				type: 'POST',
				beforeSend: (jqXHR) ->
					$('#timsChatInput').addClass 'ajaxLoad'
				success: $.proxy((data, textStatus, jqXHR) ->
					@getMessages()
				, @)
				complete: () ->
					$('#timsChatInput').removeClass 'ajaxLoad'
		###
		# Toggles between user- and room-list.
		# 
		# @param	jQuery-object	target
		###
		toggleSidebarContents: (target) ->
			return if target.parents('li').hasClass 'active'
			
			if target.parents('li').attr('id') is 'toggleUsers'
				$('#toggleUsers').addClass 'active'
				$('#toggleRooms').removeClass 'active'
				
				$('#timsChatRoomList').hide()
				$('#timsChatUserList').show()
			else if target.parents('li').attr('id') is 'toggleRooms'
				$('#toggleRooms').addClass 'active'
				$('#toggleUsers').removeClass 'active'
				
				$('#timsChatUserList').hide()
				$('#timsChatRoomList').show()
		###
		# Toggles the user-menu.
		#
		# @param	jQuery-object	target
		###
		toggleUserMenu: (target) ->
			li = target.parent()
			
			if li.hasClass 'activeMenuItem'
				li.find('.timsChatUserMenu').wcfBlindOut 'vertical', () ->
					li.removeClass 'activeMenuItem'
			else
				li.addClass 'activeMenuItem'
				li.find('.timsChatUserMenu').wcfBlindIn 'vertical'
		###
		# Unloads the chat.
		###
		unload: () ->
			$.ajax @config.unloadURL,
				type: 'POST'
				async: false
)(jQuery, @, console)