class Annotation < ApplicationRecord
  acts_as_list column: :rank, scope: %i[doctrine_id]

  belongs_to :annomark, optional: false

  belongs_to :doctrine, optional: false

  belongs_to :document, polymorphic: true, optional: false

  has_many :annotation_documents, inverse_of: :annotation, dependent: :destroy
  accepts_nested_attributes_for :annotation_documents, allow_destroy: true

  validates :annomark_id,
            uniqueness: { scope: %i[doctrine_id document_id document_type phil_rep] }

  def documents
    annotation_documents.collect(&:document)
  end

  def add_document(document)
    record = annotation_documents.new
    record.document = document
    record.save
  end

  def remove_document(document)
    annotation_documents.find_by(document_id: document.id).destroy
  end
end