# frozen_string_literal: true

module API
  class GroupExport < ::API::Base
    before do
      authorize! :admin_group, user_group
    end

    feature_category :importers
    urgency :low

    params do
      requires :id, type: String, desc: 'The ID of a group'
    end
    resource :groups, requirements: { id: %r{[^/]+} } do
      desc 'Download export' do
        detail 'This feature was introduced in GitLab 12.5.'
        tags %w[group_export]
        produces %w[application/octet-stream application/json]
        success code: 200
        failure [
          { code: 400, message: 'Bad request' },
          { code: 401, message: 'Unauthorized' },
          { code: 403, message: 'Forbidden' },
          { code: 404, message: 'Not found' },
          { code: 503, message: 'Service unavailable' }
        ]
      end
      get ':id/export/download' do
        check_rate_limit! :group_download_export, scope: [current_user, user_group]

        if user_group.export_file_exists?
          if user_group.export_archive_exists?
            present_carrierwave_file!(user_group.export_file)
          else
            render_api_error!('The group export file is not available yet', 404)
          end
        else
          render_api_error!('404 Not found or has expired', 404)
        end
      end

      desc 'Start export' do
        detail 'This feature was introduced in GitLab 12.5.'
        tags %w[group_export]
        success code: 202
        failure [
          { code: 401, message: 'Unauthorized' },
          { code: 403, message: 'Forbidden' },
          { code: 404, message: 'Not found' },
          { code: 429, message: 'Too many requests' },
          { code: 503, message: 'Service unavailable' }
        ]
      end
      post ':id/export' do
        check_rate_limit! :group_export, scope: current_user

        export_service = ::Groups::ImportExport::ExportService.new(group: user_group, user: current_user)

        if export_service.async_execute
          accepted!
        else
          render_api_error!(message: 'Group export could not be started.')
        end
      end

      desc 'Start relations export' do
        detail 'This feature was introduced in GitLab 13.12'
        tags %w[group_export]
        success code: 202
        failure [
          { code: 401, message: 'Unauthorized' },
          { code: 403, message: 'Forbidden' },
          { code: 404, message: 'Not found' },
          { code: 503, message: 'Service unavailable' }
        ]
      end
      post ':id/export_relations' do
        response = ::BulkImports::ExportService.new(portable: user_group, user: current_user).execute

        if response.success?
          accepted!
        else
          render_api_error!(message: 'Group relations export could not be started.')
        end
      end

      desc 'Download relations export' do
        detail 'This feature was introduced in GitLab 13.12'
        produces %w[application/octet-stream application/json]
        tags %w[group_export]
        success code: 200
        failure [
          { code: 401, message: 'Unauthorized' },
          { code: 403, message: 'Forbidden' },
          { code: 404, message: 'Not found' },
          { code: 503, message: 'Service unavailable' }
        ]
      end
      params do
        requires :relation, type: String, desc: 'Group relation name'
      end
      get ':id/export_relations/download' do
        export = user_group.bulk_import_exports.find_by_relation(params[:relation])
        file = export&.upload&.export_file

        if file
          present_carrierwave_file!(file)
        else
          render_api_error!('404 Not found', 404)
        end
      end

      desc 'Relations export status' do
        detail 'This feature was introduced in GitLab 13.12'
        is_array true
        tags %w[group_export]
        success code: 200, model: Entities::BulkImports::ExportStatus
        failure [
          { code: 401, message: 'Unauthorized' },
          { code: 403, message: 'Forbidden' },
          { code: 404, message: 'Not found' },
          { code: 503, message: 'Service unavailable' }
        ]
      end
      get ':id/export_relations/status' do
        present user_group.bulk_import_exports, with: Entities::BulkImports::ExportStatus
      end
    end
  end
end