module Logistics
  module Core
    class ContractService < ApplicationRecord
      belongs_to :contract
      belongs_to :chargeable_service_unit_of_charge
      belongs_to :chargeable_service
      belongs_to :unit_of_charge
      belongs_to :service_delivery_unit

      delegate(:name, to: :chargeable_service, prefix: true, allow_nil: true)
      delegate(:contract_number, to: :contract, prefix: false, allow_nil: true)
      def unit_of_charge_name
        chargeable_service_unit_of_charge&.unit_of_charge&.name
      end
      def service_delivery_unit_name
        chargeable_service_unit_of_charge&.service_delivery_unit&.name
      end
      def service_delivery_unit_id
        chargeable_service_unit_of_charge&.service_delivery_unit_id
      end
    end
  end
end