class Dscf::Marketplace::Category

def self.ransackable_associations(_auth_object = nil)
  %w[parent subcategories products]
end

def self.ransackable_attributes(_auth_object = nil)
  %w[id name description parent_id created_at updated_at]
end

def descendants
  descendants = []
  subcategories.each do |subcategory|
    descendants << subcategory
    descendants.concat(subcategory.descendants)
  end
  descendants
end

def parent_not_self_or_descendant
  return unless parent_id
  if parent_id == id
    errors.add(:parent_id, "cannot be self-referencing")
    return
  end
  # Check for circular reference in descendants
  current = self.class.find_by(id: parent_id)
  while current
    if current.id == id
      errors.add(:parent_id, "creates circular reference")
      break
    end
    current = current.parent
  end
end

def root?
  parent_id.nil?
end