class PictureFile < ApplicationRecord
  scope :attached, -> { where('picture_attachable_id IS NOT NULL') }
  belongs_to :picture_attachable, polymorphic: true
  before_save :extract_dimensions

  if ENV['ENJU_STORAGE'] == 's3'
    has_attached_file :picture, storage: :s3, styles: { medium: "600x600>", thumb: "100x100>" },
      s3_credentials: {
        access_key: ENV['AWS_ACCESS_KEY_ID'],
        secret_access_key: ENV['AWS_SECRET_ACCESS_KEY'],
        bucket: ENV['S3_BUCKET_NAME'],
        s3_host_name: ENV['S3_HOST_NAME'],
        s3_region: ENV['S3_REGION']
      },
      s3_permissions: :private
  else
    has_attached_file :picture, styles: { medium: "600x600>", thumb: "100x100>" },
      path: ":rails_root/private/system/:class/:attachment/:id_partition/:style/:filename"
  end
  validates_attachment_presence :picture
  validates_attachment_content_type :picture, content_type: /\Aimage\/.*\Z/

  validates :picture_attachable_type, presence: true, inclusion: { in: ['Event', 'Manifestation', 'Agent', 'Shelf'] }
  validates_associated :picture_attachable
  default_scope { order('picture_files.position') }
  # http://railsforum.com/viewtopic.php?id=11615
  acts_as_list scope: 'picture_attachable_type=\'#{picture_attachable_type}\''
  strip_attributes only: :picture_attachable_type

  paginates_per 10

  private
  def extract_dimensions
    return nil unless picture.queued_for_write[:original]
    geometry = Paperclip::Geometry.from_file(picture.queued_for_write[:original])
    self.picture_width = geometry.width.to_i
    self.picture_height = geometry.height.to_i
  end
end

# == Schema Information
#
# Table name: picture_files
#
#  id                      :integer          not null, primary key
#  picture_attachable_id   :integer
#  picture_attachable_type :string
#  title                   :text
#  position                :integer
#  created_at              :datetime
#  updated_at              :datetime
#  picture_file_name       :string
#  picture_content_type    :string
#  picture_file_size       :integer
#  picture_updated_at      :datetime
#  picture_meta            :text
#  picture_fingerprint     :string
#  picture_width           :integer
#  picture_height          :integer
#