module Sis
  module Core
    class Exam < ApplicationRecord
      belongs_to :exam_setup

      validates :title, :start, :finish, :pass_point, :points, presence: true

      before_validation :set_pass_point

      def set_pass_point
        self.pass_point = points / 2 unless pass_point || !points
      end

      delegate(:name, to: :exam_setup, prefix: true, allow_nil: false)

      scope :by_application_setup, (lambda do |app_setup_id|
        joins(:exam_setup).where('sis_core_exam_setups.application_setup_id': app_setup_id)
      end)
    end
  end
end