module CamaleonCms
  class NavMenuItem < CamaleonCms::TermTaxonomy
    alias_attribute :site_id, :term_group
    alias_attribute :label, :name
    alias_attribute :url, :description
    alias_attribute :kind, :slug
    alias_attribute :target, :status
    # attr_accessible :label, :url, :kind
    #
    default_scope { where(taxonomy: :nav_menu_item).order(id: :asc) }

    belongs_to :parent, class_name: 'CamaleonCms::NavMenu', inverse_of: :children, required: false
    belongs_to :parent_item, class_name: 'CamaleonCms::NavMenuItem', foreign_key: :parent_id, inverse_of: :children,
                             required: false
    has_many :children, class_name: 'CamaleonCms::NavMenuItem', foreign_key: :parent_id, dependent: :destroy,
                        inverse_of: :parent_item

    before_create :set_parent_site
    after_create :update_count
    # before_destroy :update_count

    # return the main menu
    def main_menu
      return parent if parent

      parent_item&.main_menu
    end

    # check if this menu have children
    def have_children?
      children.count != 0
    end

    # add sub menu for a menu item
    # same values of NavMenu#append_menu_item
    # return item created
    def append_menu_item(value)
      children.create({ name: value[:label], url: value[:link], kind: value[:type], target: value[:target] })
    end

    # update current menu
    # value: same as append_menu_item (label, link, target)
    def update_menu_item(value)
      update({ name: value[:label], url: value[:link], target: value[:target] })
    end

    # overwrite skip uniq slug validation
    def skip_slug_validation?
      true
    end

    def before_validating; end

    private

    def update_count
      parent&.update_column('count', parent.children.size)
      parent_item&.update_column('count', parent_item.children.size)
      update_column(:term_group, main_menu.parent_id)
      update_column(:term_order, CamaleonCms::NavMenuItem.where(parent_id: parent_id).count) # update position
    end

    # fast access from site to menu items
    def set_parent_site
      self.site_id = parent_item.site_id if parent_item
      self.site_id = parent.site_id if parent
    end

    # overwrite inherit method
    def destroy_dependencies; end
  end
end