class Language < ApplicationRecord
  include WorksOwner
  validates :short, presence: true, uniqueness: true, length: { maximum: 4 }
  validates :name, presence: true, uniqueness: true

  has_many :works
  has_many :locales
  has_many :admin_posts
  has_many :archive_faqs

  scope :default_order, -> { order(Arel.sql("COALESCE(NULLIF(sortable_name,''), short)")) }

  def to_param
    short
  end

  def self.default
    self.find_or_create_by(short: ArchiveConfig.DEFAULT_LANGUAGE_SHORT, name: ArchiveConfig.DEFAULT_LANGUAGE_NAME)
  end

  def work_count
    self.works.where(posted: true).count
  end

  def fandom_count
    Fandom.joins(:works).where(works: { id: self.works.posted.collect(&:id) }).distinct.select("tags.id").count
  end
end