# == Schema Information
#
# Table name: categories
#
#  id                     :bigint           not null, primary key
#  description            :text
#  locale                 :string           default("en")
#  name                   :string
#  position               :integer
#  slug                   :string           not null
#  created_at             :datetime         not null
#  updated_at             :datetime         not null
#  account_id             :integer          not null
#  associated_category_id :bigint
#  parent_category_id     :bigint
#  portal_id              :integer          not null
#
# Indexes
#
#  index_categories_on_associated_category_id         (associated_category_id)
#  index_categories_on_locale                         (locale)
#  index_categories_on_locale_and_account_id          (locale,account_id)
#  index_categories_on_parent_category_id             (parent_category_id)
#  index_categories_on_slug_and_locale_and_portal_id  (slug,locale,portal_id) UNIQUE
#
# Foreign Keys
#
#  fk_rails_...  (associated_category_id => categories.id)
#  fk_rails_...  (parent_category_id => categories.id)
#
class Category < ApplicationRecord
  belongs_to :account
  belongs_to :portal
  has_many :folders, dependent: :destroy_async
  has_many :articles, dependent: :nullify
  has_many :category_related_categories,
           class_name: :RelatedCategory,
           dependent: :destroy_async
  has_many :related_categories,
           through: :category_related_categories,
           class_name: :Category,
           dependent: :nullify
  has_many :sub_categories,
           class_name: :Category,
           foreign_key: :parent_category_id,
           dependent: :nullify,
           inverse_of: 'parent_category'
  has_many :associated_categories,
           class_name: :Category,
           foreign_key: :associated_category_id,
           dependent: :nullify,
           inverse_of: 'root_category'
  belongs_to :parent_category, class_name: :Category, optional: true
  belongs_to :root_category,
             class_name: :Category,
             foreign_key: :associated_category_id,
             inverse_of: :associated_categories,
             optional: true

  before_validation :ensure_account_id
  validates :account_id, presence: true
  validates :slug, presence: true
  validates :name, presence: true
  validate :allowed_locales
  validates :locale, uniqueness: { scope: %i[slug portal_id],
                                   message: 'should be unique in the category and portal' }
  accepts_nested_attributes_for :related_categories

  scope :search_by_locale, ->(locale) { where(locale: locale) if locale.present? }

  def self.search(params)
    search_by_locale(params[:locale]).page(current_page(params)).order(position: :asc)
  end

  def self.current_page(params)
    params[:page] || 1
  end

  private

  def ensure_account_id
    self.account_id = portal&.account_id
  end

  def allowed_locales
    return if portal.blank?

    allowed_locales = portal.config['allowed_locales']

    return true if allowed_locales.include?(locale)

    errors.add(:locale, "#{locale} of category is not part of portal's #{allowed_locales}.")
  end
end