module RegenerationStatus
  extend ActiveSupport::Concern

  READY                     = 0
  WAITING_FOR_REGENERATION  = 100
  REGENERATING              = 200

  HUMAN_STATUSES = {
    READY                     => :ready,
    WAITING_FOR_REGENERATION  => :waiting_for_regeneration,
    REGENERATING              => :regenerating
  }

  HUMAN_REGENERATION_STATUSES = {
    AbfWorker::BaseObserver::COMPLETED  => :completed,
    AbfWorker::BaseObserver::FAILED     => :failed,
    AbfWorker::BaseObserver::CANCELED   => :canceled
  }.freeze

  included do
    after_update :cleanup_file_store

    def sha1_of_file_store_files
      files = []
      files << last_regenerated_log_sha1 if last_regenerated_log_sha1.present?
      files
    end

    def human_regeneration_status
      self.class::HUMAN_REGENERATION_STATUSES[last_regenerated_status] || :no_data
    end

    def human_status
      self.class::HUMAN_STATUSES[status] || :no_data
    end

    def cleanup_file_store
      old_log_sha1 = last_regenerated_log_sha1_was
      if old_log_sha1.present? && old_log_sha1 != last_regenerated_log_sha1
        later_destroy_files_from_file_store([old_log_sha1])
      end
    end
  end
end