class Locale < ApplicationRecord
  after_save :generate_tag_names!, if: :needs_tag_names?

  belongs_to :language, foreign_key: :language_code, primary_key: :code
  belongs_to :script, foreign_key: :script_code, primary_key: :code

  enum :code, ja: 'ja', ain_kana: 'ain-Kana'

  def self.nipponese = Locale.find('ja')

  private

  def needs_tag_names?
    deprecated_at.nil? && (saved_change_to_code? || saved_change_to_deprecated_at?)
  end

  def generate_tag_names! = TagNameCompletion.for_locale!(self)
end