Xmpp.Views.Tabbar ||= {}
 
 class Xmpp.Views.Tabbar.TabbarView extends Backbone.View
   template: JST["backbone/templates/tabbar/tabbar"]
   el: $('#js-tabbar')
 
   initialize: () ->
     _.bindAll(this)
 

     Backbone.Events.on('openChat', (chat) =>
       @hideCurrentChatWindow()
       @addOrSelect(chat)
     )

 
     Backbone.Events.on('closeChat', (chat) =>
       tab = _.find(@tabs, (_tab) =>
         _tab.model == chat
       )
 
       @closeTab(tab) if tab

     )

     @tabs = []

     @activeTab = null

     @render()
 
   addOrSelect: (chat) ->
     tab = _.find(@tabs, (tab) ->
       tab.hasParticipants(chat.get('who'), chat.get('withWhom'))
     )
 
     if (!! tab)
       App.debug 'selecting existing tab'
     else
       App.debug 'adding new tab'
       tab = new Xmpp.Views.Tabbar.TabView(model: chat)
       @tabs.push tab
       $(@el).append(tab.render().el)
 
     _.each(@tabs, (tab) ->
       tab.setInactive()
     )
 

     @activeTab = tab
     @activeTab.setActive()
     @activeTab.showChat()
 
   hideCurrentChatWindow: ->
     if @activeTab
       App.debug 'zakryvam chat window'
       @activeTab.hideChat()

   closeTab: (tab) ->
     @removeTab(tab)
 
     if tab == @activeTab
       firstTab = @selectFirstTab()
       if firstTab
         App.debug 'fire openChat'
         Backbone.Events.trigger('openChat', firstTab.model)
     #TODO: vybrat naposledy pouzity tab
 

   removeTab: (tab) ->
     @tabs = _.without(@tabs, tab)
 
   render: ->

     $(@el).html(@template())

     return this

 
   selectFirstTab: ->
     _.first(@tabs)