class Order < ApplicationRecord
  validates :status, presence: true
  validates :total, numericality: { greater_than: 0 }, if: :paid?

  before_validation :normalize_status
  before_save :calculate_total
  after_create :send_confirmation
  after_commit :notify_warehouse

  private

  def normalize_status
    self.status = status&.strip&.downcase
  end

  def calculate_total
    # placeholder
  end

  def send_confirmation
    # placeholder
  end

  def notify_warehouse
    # placeholder
  end

  def paid?
    status == "paid"
  end
end