# frozen_string_literal: true

require 'json'

module Cocina
  module Models
    # A digital repository object.  See http://sul-dlss.github.io/cocina-models/maps/DRO.json
    class DRO < Dry::Struct
      include Checkable

      TYPES = [
        Vocab.object,
        Vocab.three_dimensional,
        Vocab.agreement,
        Vocab.book,
        Vocab.document,
        Vocab.geo,
        Vocab.image,
        Vocab.page,
        Vocab.photograph,
        Vocab.manuscript,
        Vocab.map,
        Vocab.media,
        Vocab.track,
        Vocab.webarchive_binary,
        Vocab.webarchive_seed
      ].freeze

      # Subschema for access concerns
      class Access < Dry::Struct
        attribute :embargoReleaseDate, Types::Params::DateTime.meta(omittable: true)

        def self.from_dynamic(dyn)
          params = {}
          params[:embargoReleaseDate] = dyn['embargoReleaseDate'] if dyn['embargoReleaseDate']
          Access.new(params)
        end
      end

      # Subschema for administrative concerns
      class Administrative < Dry::Struct
        attribute :releaseTags, Types::Strict::Array.of(ReleaseTag).meta(omittable: true).default([].freeze)
        # Allowing hasAdminPolicy to be omittable for now (until rolled out to consumers),
        # but I think it's actually required for every DRO
        attribute :hasAdminPolicy, Types::Coercible::String.optional.default(nil)

        def self.from_dynamic(dyn)
          params = {}
          params[:releaseTags] = dyn['releaseTags'].map { |rt| ReleaseTag.from_dynamic(rt) } if dyn['releaseTags']
          params[:hasAdminPolicy] = dyn['hasAdminPolicy']
          Administrative.new(params)
        end
      end

      class Identification < Dry::Struct
      end

      # Structural sub-schema for the DRO
      class Structural < Dry::Struct
        attribute :contains, Types::Strict::Array.of(FileSet).meta(omittable: true)
        attribute :isMemberOf, Types::Strict::String.meta(omittable: true)

        def self.from_dynamic(dyn)
          params = {}
          params[:isMemberOf] = dyn['isMemberOf'] if dyn['isMemberOf']
          params[:contains] = dyn['contains'].map { |fs| FileSet.from_dynamic(fs) } if dyn['contains']
          Structural.new(params)
        end
      end

      attribute :externalIdentifier, Types::Strict::String
      attribute :type, Types::String.enum(*TYPES)
      attribute :label, Types::Strict::String
      attribute :version, Types::Coercible::Integer
      attribute(:access, Access.default { Access.new })
      attribute(:administrative, Administrative.default { Administrative.new })
      attribute(:identification, Identification.default { Identification.new })
      attribute(:structural, Structural.default { Structural.new })

      def self.from_dynamic(dyn)
        params = {
          externalIdentifier: dyn['externalIdentifier'],
          type: dyn['type'],
          label: dyn['label'],
          version: dyn['version']
        }

        params[:access] = Access.from_dynamic(dyn['access']) if dyn['access']
        params[:administrative] = Administrative.from_dynamic(dyn['administrative']) if dyn['administrative']
        params[:structural] = Structural.from_dynamic(dyn['structural']) if dyn['structural']

        DRO.new(params)
      end

      def self.from_json(json)
        from_dynamic(JSON.parse(json))
      end

      def image?
        type == Vocab.image
      end
    end
  end
end