require 'encore/entity/input'
require 'encore/entity/output'

module Encore
  module Entity
    extend ActiveSupport::Concern

    included do
      include Input
      include Output

      # Make `object` accessible for others
      attr_accessor :object
    end

    # Initialize a new entity, linked to an ActiveRecord object
    # If no object is passed, let's try to build a new one
    def initialize(object = nil)
      @object = object || self.class.linked_class.new
    end

    # Delegate everything to the object
    def method_missing(method, *args, &blk)
      @object.send(method, *args, &blk)
    end

    module ClassMethods
      # Return the object class. If no object is present, try to
      # guess the class with our own class name (`UserEntity` would be `User`)
      def linked_class
        @object ? @object.class : self.name.split(/Entity$/).first.constantize
      end
    end
  end
end