module Api
  class DocumentsController < BaseController
    load_and_authorize_resource :document, class: "Cdao::Document", only: %i[show]
    authorize_resource :document, class: "Cdao::Document", only: %i[index]

    def index
      search = document_search(search_params)

      @documents = search.results

      respond_with @documents
    end

    def show
      respond_with @document
    end

    private

      def document_search(search_params)
        fulltext_fields = %i[reference_number title short_title].freeze

        search = Cdao::Document.search do
          fulltext search_params[:q], fields: fulltext_fields, query_phrase_slop: 0, minimum_match: 1 if search_params[:q].present?

          fulltext_fields.each do |field|
            fulltext search_params[field], fields: [field], query_phrase_slop: 0, minimum_match: 1 if search_params[field].present?
          end

          with(:year, search_params[:year].to_i) if search_params[:year].present?

          without(:id).any_of(search_params[:exclude_ids]) if search_params[:exclude_ids].present?

          with(:citation_finders_names).any_of(search_params[:citation_finder]) if search_params[:citation_finder].present?

          with(:is_only_in_premium_libraries, false)

          order_by :doc_date, :desc
          order_by :year, :desc

          paginate page: search_params[:page] || 1, per_page: search_params[:per_page] || 20
        end

        search
      end

      def search_params
        params.permit(:reference_number, :title, :short_title, :year, :citation_finder,
                      :q, :page, :per_page,
                      exclude_ids: [])
      end
  end
end