module Ddr
  module HasContent
    extend ActiveSupport::Concern

    included do
      attribute :content, Ddr::File.optional
      attribute :fits_file, Ddr::File.optional

      ### DDRevo ################################################
      # Extracted text factored out to separate concern -- Ddr::HasExtractedText
      ### DDRevo ################################################
      # has_file_datastream \
      #     name: Ddr::Datastreams::EXTRACTED_TEXT,
      #     type: Ddr::Datastreams::PlainTextDatastream,
      #     versionable: true,
      #     label: "Text extracted from the content file",
      #     control_group: "M"
      #

      delegate :original_filename, to: :content, allow_nil: true

      #######DDRevo#########
      # expect that the FileManagement module will go to staff app
      #######DDRevo#########
      # include FileManagement
      #
      #######DDRevo#########
      # to staff app
      #######DDRevo#########
      # delegate :validate_checksum!, to: :content
    end

    #######DDRevo#########
    # to staff app
    #######DDRevo#########
    # # Convenience method wrapping FileManagement#add_file
    # def upload file, opts={}
    #   add_file(file, Ddr::Datastreams::CONTENT, opts)
    # end
    #
    #######DDRevo#########
    # to staff app
    #######DDRevo#########
    # # Set content to file and save
    # def upload! file, opts={}
    #   upload(file, opts)
    #   save
    # end
    #
    #######DDRevo#########
    # DerivativesManager will go to staff app.  Need to determine if there is a need for a '#derivatives' method on
    # content-bearing objects and, if so, what it should return
    #######DDRevo#########
    # def derivatives
    #   @derivatives ||= Ddr::Managers::DerivativesManager.new(self)
    # end
    #
    def techmd
      @techmd ||= Ddr::Managers::TechnicalMetadataManager.new(self)
    end

    def content_size
      content&.file&.size
    end

    def content_human_size
      ActiveSupport::NumberHelper.number_to_human_size(content_size) if content_size
    end

    def content_type
      content&.media_type
    end

    def content_major_type
      content_type&.split("/")&.first
    end

    def content_sub_type
      content_type&.split("/")&.last
    end

    # def content_type= mime_type
    #   self.content.mimeType = mime_type
    # end
    #
    def image?
      content_major_type == "image"
    end

    def pdf?
      content_type == "application/pdf"
    end

    # def virus_checks
    #   Ddr::Events::VirusCheckEvent.for_object(self)
    # end
    #
    # def last_virus_check
    #   virus_checks.last
    # end
    #
    # def last_virus_check_on
    #   last_virus_check && last_virus_check.event_date_time
    # end
    #
    # def last_virus_check_outcome
    #   last_virus_check && last_virus_check.outcome
    # end
    #
    # def content_changed?
    #   content.external? ? content.dsLocation_changed? : content.content_changed?
    # end
    #
    ### DDRevo ###########################################
    # Moved to Ddr::Resource where other 'has_<file>?' methods reside
    ### DDRevo ###########################################
    # def has_extracted_text?
    #   extractedText.has_content?
    # end
    #
    # def with_content_file(&block)
    #   WithContentFile.new(self, &block)
    # end
    #
    # protected
    #
    # def default_content_type
    #   "application/octet-stream"
    # end

  end
end