module InternalAffairs
  class PendingOperation < ::ActiveRecord::Base
    serialize :target_attributes

    self.table_name = "internal_affairs_pending_operations"

    validates :operation_uuid, :target_class, presence: true

    def target=(_target)
      # use separate class and attributes serialization to support non-ar cases

      if _target.present?
        self.target_class = _target.class.to_s
        self.target_attributes = _target.attributes_for_operation_serialization
      else
        self.target_class = self.target_attributes = nil
      end

      @target = _target
    end

    def target
      @target ||= load_target
    end

    private

    def load_target
      return nil if target_class.nil?

      if target_attributes.is_a? Hash
        target_class.constantize.load_from_operation_serialized_attributes(**target_attributes)
      else
        target_class.constantize.load_from_operation_serialized_attributes(target_attributes)
      end
    end
  end
end