require 'berkeley_library/util'

require 'berkeley_library/av/track'
require 'berkeley_library/av/metadata'
require 'berkeley_library/av/metadata/source'

module BerkeleyLibrary
  module AV
    class Record
      include BerkeleyLibrary::Util

      attr_reader :collection, :tracks, :metadata

      # TODO: stop passing in track list & just get it from metadata & collection
      def initialize(collection:, tracks:, metadata:)
        @collection = collection
        @tracks = tracks.sort
        @metadata = metadata
      end

      def title
        metadata.title
      end

      def bib_number
        metadata.bib_number
      end

      def tind_id
        metadata.tind_id
      end

      def record_id
        metadata.record_id
      end

      def calnet_or_ip?
        metadata.calnet_or_ip?
      end

      def calnet_only?
        metadata.calnet_only?
      end

      def type_label
        @type_label ||= begin
          file_types = Set.new(tracks.map(&:file_type)).to_a.sort
          file_types = AV::Types::FileType.to_a if file_types.empty?

          file_types.map(&:label).join(' / ')
        end
      end

      def player_uri
        @player_uri ||= URIs.append(AV::Config.avplayer_base_uri, collection, record_id)
      end

      def display_uri
        metadata.display_uri
      end

      def description
        metadata.description
      end

      class << self
        # Loads the metadata for the specified record and creates a record object from it.
        #
        # Note that for TIND records the record ID is *not* the TIND internal ID
        # (MARC field 001) but rather the ID assigned by the UC Berkeley Library
        # (MARC field 035).
        #
        # @param collection [String] The collection name (Wowza application id).
        # @param record_id [String] The record ID.
        def from_metadata(collection:, record_id:)
          metadata = Metadata.for_record(record_id:)
          Record.new(
            collection:,
            metadata:,
            tracks: Track.tracks_from(metadata.marc_record, collection:)
          )
        end
      end
    end
  end
end