class UserAttributeModel
  
  include Mongoid::Document
  include Mongoid::Timestamps
  
  field :key
  field :i18n_variable_id, :type => BSON::ObjectId, :index => true
  
  embeds_many :attribute_models
  
  after_update :destroy_attrs
  
  # Update or create the attribute_model records
  def attribute_models=(*attrs)
    attrs[0].each do |attributes|
      if attributes[:id].blank?
        attribute_models.build(attributes)
      else
        attribute_model = attribute_models.detect {|a| a.id.to_s == attributes[:id].to_s }
        attribute_model.update_attributes(attributes)
      end
    end
  end
  
  # Destroy the i18n_variables
  def destroy_i18n_variables
    self.i18n_variable.destroy rescue nil
    self.attribute_models.each do |attr|
      attr.destroy_i18n_variable
    end
  end
  
  # Update or create the i18n_variable record
  def i18n_variable=(attr)
    if self.i18n_variable_id
      self.i18n_variable.update_attributes(attr) rescue nil
    else
      var = I18nVariable.new(attr.merge({:key => self.key, :document_class => self.class}))
      var.save
      self.i18n_variable_id = var.id
    end
  end
  
   # Get the i18n_variable
  def i18n_variable
    @i18n_variable ||= I18nVariable.find(self.i18n_variable_id) rescue nil
  end
  
  protected
  
  # Destroy the i18n_variable for each attribute_models if marked to destroy
  def destroy_attrs
    attribute_models.each do |a|
      if a.should_destroy?
        a.destroy_i18n_variable
      end
    end
  end
  
end