module Mks
  module Rate
    class ServiceRate < ApplicationRecord
      validates :base_rate, :utilization_rate, :chargeable_service_id, presence: true
      belongs_to :chargeable_service
      belongs_to :equipment_item, class_name: 'Mks::Edm::EquipmentItem', optional: true

      delegate(:name, to: :chargeable_service, prefix: true)
      delegate(:name, to: :equipment_item, prefix: true, allow_nil: true)
      delegate(:service_delivery_unit_id, to: :chargeable_service, prefix: false)
      delegate(:service_delivery_unit_name, to: :chargeable_service, prefix: false)

      alias_method :sdu_id, :service_delivery_unit_id
      alias_method :sdu_name, :service_delivery_unit_name
    end
  end
end