module Comee
  module Core
    class SupplierInvoiceItem < ApplicationRecord
      before_save { self.total_price = unit_price * quantity }
      after_save :update_invoice_price

      belongs_to :purchase_order_item
      belongs_to :supplier_invoice
      belongs_to :unit

      validates :quantity, :unit_price, presence: true, numericality: {greater_than: 0}
      validates :total_price, numericality: {greater_than_or_equal_to: 0, allow_nil: true}

      def update_invoice_price
        supplier_invoice.total_price = supplier_invoice.supplier_invoice_items.sum(:total_price)
        supplier_invoice.save!
      end
    end
  end
end