Xmpp.Views.Chat ||= {}
 
 class Xmpp.Views.Chat.WindowView extends Backbone.View
   template: JST["backbone/templates/chat/window"]
   el: $('#conversation-js')

   inputSelector: 'input[type=text]'

   maxHistoryLength: 20

   savingHistory: true

   historyStep: 0

   events:
     'submit #msg-writer': (e) -> @sendMessage(e)

     'change .history-settings input': 'changeHistorySettings'

     'click .history-settings .load-history': 'loadHistory'

   initialize: (options) ->

     _.bindAll(this)

     @historyStack = []

     @tab = options.tab
 
     chatId = @tab.getChatId()

     attendant = if not chatId then @tab.getAttendant().get('jid') else null
 

     App.Com.checkSavingHistory(App.Models.me.get('jid'), chatId, attendant, (canSave) =>
       @savingHistory = canSave
       @_changeHistoryVisibly(@savingHistory)
     )

     @loadHistory()
 

   render: ->

     historyStackHtml = _.map(@historyStack, (view) ->
       view.render().el.outerHTML
     )

     $(@el).html(@template(hideHistoryLoading: @tab.getChatId() != null, history: historyStackHtml))

     @_changeHistoryVisibly(@savingHistory)
 

     @show()
     return this
 
   hide: ->
     $(@el).addClass('hidden')

     @undelegateEvents()

     this
 
   show: ->
     $(@el).removeClass('hidden')

     @delegateEvents()

     $(@el).find(@inputSelector).focus()

     this
 
   remove: ->
     @undelegateEvents()
     $(@el).empty()

     @stopListening()
     _.each(@historyStack, (item)->
       item.remove()
     )
     return this

 
   sendMessage: (e) ->
     e.preventDefault()
     $this = $(e.currentTarget)

     input = $this.find(@inputSelector)

     message = input.val()

     input.val('').focus()

     if (message.trim())
       chatId = @tab.getChatId()

       attendant = if not chatId then @tab.getAttendant().getPreferredResource() else null

 
       App.Models.me.sendMessage(message, chatId, attendant

       , (message) =>

         @sendSuccess(App.Models.me, message)

       , (message) =>

         @sendFail(message))
 
   sendSuccess: (me, msg) ->
     @appendMessage(me, new Date(), msg)
 
   sendFail: ->
     @appendEvent(I18n.t('chat.window.sendFailed'), false)
 
   appendEvent: (msg, logMe) ->
     App.debug ['append event', msg]
 #    @log(eventView) if logMe == true
 
   appendMessage: (user, date, msg) ->

     messageView = new Xmpp.Views.Chat.MessageView(user: user, date: date, message: msg, fromMe: user.get('jid') == App.Models.me.get('jid'))

     $(@el).find('.messages').append(messageView.render().el)

     @log(messageView)

     Backbone.Events.trigger('resizeWorkspace')

   log: (view, isHistoryMessage) ->

     if (@historyStack.length + 1 >= @maxHistoryLength)
       @historyStack = @historyStack.slice(@historyStack.length - @maxHistoryLength + 1)
 

     if not isHistoryMessage? || isHistoryMessage == false
       @historyStack.push(view)
     else
       @historyStack.unshift(view)

 
   changeHistorySettings: (e) ->
     $input = $(e.currentTarget)
     state = $input.is(':checked')
 
     chatId = @tab.getChatId()
     attendant = if not chatId then @tab.getAttendant().getPreferredResource() else null
     App.Com.setHistory(App.Models.me.get('jid'), chatId, attendant, state, =>
       @savingHistory = state
       @_changeHistoryVisibly(state)
     )
 
   _changeHistoryVisibly: (currentState) ->
     if currentState
       toEnable = '.enabled'
       toDisable = '.disabled'
     else
       toEnable = '.disabled'
       toDisable = '.enabled'
 
     $(@el).find(".action#{toEnable}, .current#{toEnable}").show()

     $(@el).find(".action#{toDisable}, .current#{toDisable}").hide()
 
   prependHistoryMessage: (user, date, msg) ->
     messageView = new Xmpp.Views.Chat.MessageView(user: user, date: date, message: msg, fromMe: user.get('jid') == App.Models.me.get('jid'))
     $(@el).find('.messages').prepend(messageView.render().el)
     @log(messageView, true)
 
   loadHistory: ->
     chatId = @tab.getChatId()
     attendant = if not chatId then @tab.getAttendant().get('jid') else null
 
     App.Com.loadHistory(App.Models.me.get('jid'), chatId, attendant, @historyStep, (result) =>
       App.debug result
 
       _.each(result.history.reverse(), (message) =>
         jid = App.stripJid(message.from)
         if App.Models.me.get('jid') == jid
           contact = App.Models.me
         else
           contact = App.Collections.contacts.findByJid(jid) || Xmpp.Collections.ChatsCollection.createTempContact(jid)
 
         @prependHistoryMessage(contact, new Date(message.created_at), message.message)
       )
 
       @historyStep++ unless _.isEmpty(result.history)
     )