class IngestFileJob < ActiveJob::Base
  include CurationConcerns::Lockable

  queue_as CurationConcerns.config.ingest_queue_name

  # @param [FileSet] file_set
  # @param [String] filepath the cached file within the CurationConcerns.config.working_path
  # @param [User] user
  # @option opts [String] mime_type
  # @option opts [String] filename
  # @option opts [String] relation, ex. :original_file
  def perform(file_set, filepath, user, opts = {})
    relation = opts.fetch(:relation, :original_file).to_sym

    # Wrap in an IO decorator to attach passed-in options
    local_file = Hydra::Derivatives::IoDecorator.new(File.open(filepath, "rb"))
    local_file.mime_type = opts.fetch(:mime_type, nil)
    local_file.original_name = opts.fetch(:filename, File.basename(filepath))

    # Prevent other jobs from trying to modify the FileSet at the same time
    acquire_lock_for(file_set.id) do
      # Tell AddFileToFileSet service to skip versioning because versions will be minted by
      # VersionCommitter when necessary during save_characterize_and_record_committer.
      Hydra::Works::AddFileToFileSet.call(file_set,
                                          local_file,
                                          relation,
                                          versioning: false)
      # Persist changes to the file_set
      file_set.save!
    end

    repository_file = file_set.send(relation)

    # Do post file ingest actions
    CurationConcerns::VersioningService.create(repository_file, user)

    # TODO: this is a problem, the file may not be available at this path on another machine.
    # It may be local, or it may be in s3
    CharacterizeJob.perform_later(file_set, repository_file.id, filepath)
  end
end