class Pettanr.GroundPicture extends Peta.Element
  url: '/ground_pictures/'
  
  @singular: () ->
    'GroundPicture'
  
  @plural: () ->
    'GroundPictures'
  
  defaults: {
    id: null,
    x: 0,
    y: 0,
    repeat: 0
  } 
  
  @repeat_texts: () -> 
    ['repeat', 'repeat-x', 'repeat-y', 'no-repeat']
  
  picture: () ->
    new Pettanr.Picture({id: @get('picture_id')})
  
  has_picture: () ->
    true
  
  style: (spot = null, opacity = 20) ->
    r = {
      position: 'absolute', 
      top: '0px', 
      left: '0px',
      'z-index': @get('z'), 
      'background-image': 'url(' + @picture().r_url() + ')', 
      'background-repeat': @repeat_text(), 
      'background-position': Pettanr.to_s(@get('x')) + 'px ' + Pettanr.to_s(@get('y')) + 'px'
    }
    @merge_opacity(r, opacity) if spot and spot != this
    r
  
  tmb_opt_img_tag: (picture) ->
    wh = Pettanr.Imager.thumbnail_size(picture.get('width'), picture.get('height'))
    new Pettanr.AppHelperImg({src: picture.r_url(), size: Math.abs(wh[0]), alt: @get('caption')})
  
  symbol_option: (cb) ->
    i = @picture()
    _this = this
    i.fetch().done ->
      cb(_this.tmb_opt_img_tag(i))
  
  repeat_text: () ->
    Pettanr.GroundPicture.repeat_texts()[@get('repeat')]
  
  initialize: () ->
    if @id
      @url = @url + @id
  
class Pettanr.GroundPicture.Collection extends Backbone.Collection
  model: Pettanr.GroundPicture
  url: '/ground_pictures'