class Tram.Contact extends Backbone.Model
  idAttribute: 'jid'
  optimizeSide: 96
  optimizeThreshold: 10000
  defaults:
    presence: 'unavailable'
    show: 'offline'
  initialize: ->
    @on('add change:avatar', @optimizeAvatar)
    @on 'add change:fullname change:nickname change:bjid', ->
      @set('d/handle', @get('fullname') or @get('nickname') or @get('bjid'))
    @on 'add change:type change:presence change:callstate', ->
      if @get('type') is 'self' then return @unset('d/actions')
      if @get('presence') is 'subscribe' then return @set('d/actions', ['authorize', 'unauthorize'])
      actions = ['remove']
      if @get('presence') isnt 'unavailable'
        switch @get 'callstate'
          when 'established'
            actions.push('hang-up')
          when 'outgoing'
            actions.push('wait', 'hang-up')
          when 'incoming'
            actions.push('accept', 'decline')
          else
            actions.push('call')
      @set('d/actions', actions)
  optimizeAvatar: ->
    avatar = @get('avatar')
    if not (avatar?.mime and avatar?.data)
      return @unset('avatar/url')
    data = "data:#{ avatar.mime };base64,#{ avatar.data }"
    if data.length < @optimizeThreshold
      return @set('avatar/url', data)
    img = new Image()
    img.addEventListener 'load', =>
      if img.width < @optimizeSide and img.height < @optimizeSide
        return @set('avatar/url', data)
      ratio = Math.min(@optimizeSide / img.width, @optimizeSide / img.height)
      canvas = document.createElement('canvas')
      canvas.height = Math.round(img.height * ratio)
      canvas.width = Math.round(img.width * ratio)
      ctx = canvas.getContext('2d')
      ctx.drawImage(img, 0, 0, canvas.width, canvas.height)
      mime = 'image/png'
      if avatar.mime is 'image/jpeg'
        mime = avatar.mime
      optimized = canvas.toDataURL(mime)
      if img.src.length < optimized.length
        @set('avatar/url', data)
      else
        @set('avatar/url', optimized)
    img.src = data
class Tram.Contacts extends Backbone.Collection
  model: Tram.Contact
  comparator: (model) ->
    if model.get('presence') is 'unavailable'
      return 1
    else if model.get('type') is 'self'
      return -1
    else
      return 0
  initialize: ->
    @on('change:presence change:type', @sort)
class Tram.AvatarView extends Backbone.View
  tagName: 'div'
  className: 'vignette'
  template: $('#avatar-template').html()
  colors: Tram.colors.avatar
  getColors: (hash) =>
    ci = hash % @colors.length
    "color: white; background: #{ @colors[ci] };"
  render: ->
    @$el.html(@template)
    @rivet = rivets.bind(@el, model: @model, view: this)
    @
  remove: ->
    @rivet.unbind()
    super
class Tram.ContactView extends Backbone.View
  tagName: 'li'
  className: 'contact'
  template: $('#contact-template').html()
  colors: Tram.colors.show
  events:
    'click [data-authorize]': -> @model.trigger('authorize')
    'click [data-unauthorize]': -> @model.trigger('unauthorize')
    'click [data-call]': (event) -> @model.trigger('call', event.currentTarget.getAttribute('data-call'))
    'click [data-accept]': (event) -> @model.trigger('accept', event.currentTarget.getAttribute('data-accept'))
    'click [data-decline]': -> @model.trigger('decline')
    'click [data-hang-up]': -> @model.trigger('hangup')
    'click [data-remove]': -> @model.trigger('remove')
  initialize: ->
    @$el.attr('data-jid', @model.get('jid'))
    @$el.html(@template)
    @$avatarColumn = @$('.avatar-column')
    @bind()
  bind: ->
  getPipColor: (show) =>
    "background: #{ @colors[show] || @colors['default'] };"
  render: ->
    @rivet = rivets.bind(@el, model: @model, view: this)
    av = new Tram.AvatarView(model: @model)
    @$avatarColumn.prepend(av.render().el)
    @
  remove: ->
    @rivet.unbind()
    super
class Tram.ContactsApp extends Backbone.View
  initialize: ->
    @listenTo(@collection, 'add', @onAdd)
    @listenTo(@collection, 'remove', @onRemove)
    @listenTo(@collection, 'sort', @onSort)
  onAdd: (model, collection) ->
    mi = collection.indexOf(model)
    model.view = new Tram.ContactView(model: model)
    el = model.view.render().el
    if mi is 0
      @$el.prepend(el)
    else
      @$el.children().eq(mi - 1).after(el)
  onRemove: (model) ->
    model.view?.remove()
  onSort: (collection, options) ->
    if not options.add
      collection.each (model) =>
        model.view.$el.detach()
        @$el.append(model.view.el)