class Metacode < ActiveRecord::Base
  has_many :in_metacode_sets
  has_many :metacode_sets, :through => :in_metacode_sets
  has_many :topics

  # This method associates the attribute ":aws_icon" with a file attachment
  has_attached_file :aws_icon, :styles => {
   :ninetysix => ['96x96#', :png],
  },
  :default_url => 'https://s3.amazonaws.com/metamaps-assets/metacodes/generics/96px/gen_wildcard.png'
    
  # Validate the attached icon is image/jpg, image/png, etc
  validates_attachment_content_type :aws_icon, :content_type => /\Aimage\/.*\Z/

  validate :aws_xor_manual_icon
  validate :manual_icon_https
  before_create do
    self.manual_icon = nil if self.manual_icon == ""
  end

  def icon(*args)
    if manual_icon.present?
      manual_icon
    else
      aws_icon(*args)
    end
  end

  def as_json(options={})
    default = super(options)
    default[:icon] = icon
    default.except('aws_icon_file_name', 'aws_icon_content_type', 'aws_icon_file_size', 'aws_icon_updated_at', 'manual_icon')
  end

  def hasSelected(user)
    return true if user.settings.metacodes.include? self.id.to_s
    return false
  end

  def inMetacodeSet(metacode_set)
    return true if self.metacode_sets.include? metacode_set
    return false
  end

  private

  def aws_xor_manual_icon
    if aws_icon.blank? && manual_icon.blank?
      errors.add(:base, "Either aws_icon or manual_icon is required")
    end
    if aws_icon.present? && manual_icon.present?
      errors.add(:base, "Specify aws_icon or manual_icon, not both")
    end
  end

  def manual_icon_https
    if manual_icon.present?
      unless manual_icon.starts_with? 'https'
        errors.add(:base, "Manual icon must begin with https")
      end
    end
  end
end