module Spotlight
  ##
  # Spotlight's catalog controller. Note that this subclasses
  # the host application's CatalogController to get its configuration,
  # partial overrides, etc
  # rubocop:disable Metrics/ClassLength
  class CatalogController < ::CatalogController
    include Spotlight::Concerns::ApplicationController
    load_and_authorize_resource :exhibit, class: Spotlight::Exhibit, prepend: true
    include Spotlight::Catalog
    include Spotlight::Concerns::CatalogSearchContext

    before_action :authenticate_user!, only: [:admin, :edit, :make_public, :make_private]
    before_action :check_authorization, only: [:admin, :edit, :make_public, :make_private]
    before_action :redirect_to_exhibit_home_without_search_params!, only: :index
    before_action :add_breadcrumb_with_search_params, only: :index

    before_action :attach_breadcrumbs

    before_action only: :show do
      blacklight_config.show.partials.unshift 'tophat'
      blacklight_config.show.partials.unshift 'curation_mode_toggle'
    end

    before_action only: :admin do
      blacklight_config.view.select! { |k, _v| k == :admin_table }
      blacklight_config.view.admin_table.partials = [:index_compact]
      blacklight_config.view.admin_table.document_actions = []

      unless blacklight_config.sort_fields.key? :timestamp
        blacklight_config.add_sort_field :timestamp, sort: "#{blacklight_config.index.timestamp_field} desc"
      end
    end

    before_action only: :edit do
      blacklight_config.view.edit.partials = blacklight_config.view_config(:show).partials.dup
      blacklight_config.view.edit.partials.insert(2, :edit)
    end

    def show
      super

      if @document.private? current_exhibit
        authenticate_user! && authorize!(:curate, current_exhibit)
      end

      add_document_breadcrumbs(@document)
    end

    # "id_ng" and "full_title_ng" should be defined in the Solr core's schema.xml.
    # It's expected that these fields will be set up to have  EdgeNGram filter
    # setup within their index analyzer. This will ensure that this method returns
    # results when a partial match is passed in the "q" parameter.
    def autocomplete
      search_params = params.merge(search_field: Spotlight::Engine.config.autocomplete_search_field)
      (_, @document_list) = search_results(search_params.merge(public: true, rows: 100))

      respond_to do |format|
        format.json do
          render json: { docs: autocomplete_json_response(@document_list) }
        end
      end
    end

    def admin
      add_breadcrumb t(:'spotlight.curation.sidebar.header'), exhibit_dashboard_path(@exhibit)
      add_breadcrumb t(:'spotlight.curation.sidebar.items'), admin_exhibit_catalog_path(@exhibit)
      (@response, @document_list) = search_results(params)
      @filters = params[:f] || []

      respond_to do |format|
        format.html
      end
    end

    def update
      @response, @document = fetch params[:id]
      @document.update(current_exhibit, solr_document_params)
      @document.save

      try_solr_commit!

      redirect_to polymorphic_path([current_exhibit, @document])
    end

    def edit
      @response, @document = fetch params[:id]
    end

    def make_private
      @response, @document = fetch params[:id]
      @document.make_private!(current_exhibit)
      @document.save

      respond_to do |format|
        format.html { redirect_back(fallback_location: [spotlight, current_exhibit, @document]) }
        format.json { render json: true }
      end
    end

    def make_public
      @response, @document = fetch params[:id]
      @document.make_public!(current_exhibit)
      @document.save

      respond_to do |format|
        format.html { redirect_back(fallback_location: [spotlight, current_exhibit, @document]) }
        format.json { render json: true }
      end
    end

    protected

    # TODO: move this out of app/helpers/blacklight/catalog_helper_behavior.rb and into blacklight/catalog.rb
    # rubocop:disable Style/PredicateName
    def has_search_parameters?
      !params[:q].blank? || !params[:f].blank? || !params[:search_field].blank?
    end
    # rubocop:enable Style/PredicateName

    def attach_breadcrumbs
      # The "q: ''" is necessary so that the breadcrumb builder recognizes that a path like this:
      # /exhibits/1?f%5Bgenre_sim%5D%5B%5D=map&q= is not the same as /exhibits/1
      # Otherwise the exhibit breadcrumb won't be a link.
      # see http://api.rubyonrails.org/classes/ActionView/Helpers/UrlHelper.html#method-i-current_page-3F
      add_breadcrumb t(:'spotlight.exhibits.breadcrumb', title: @exhibit.title), exhibit_root_path(@exhibit, q: '')
    end

    ##
    # Override Blacklight's #setup_next_and_previous_documents to handle
    # browse categories too
    def setup_next_and_previous_documents
      if current_search_session_from_browse_category?
        setup_next_and_previous_documents_from_browse_category if current_browse_category
      elsif current_search_session_from_page? || current_search_session_from_home_page?
        # TODO: figure out how to construct previous/next documents
      else
        super
      end
    end

    def setup_next_and_previous_documents_from_browse_category
      index = search_session['counter'].to_i - 1
      response, _docs = get_previous_and_next_documents_for_search index, current_browse_category.query_params.with_indifferent_access

      return unless response

      search_session['total'] = response.total
      @previous_document = response.documents.first
      @next_document = response.documents.last
    end

    def _prefixes
      @_prefixes ||= super + ['catalog']
    end

    ##
    # Admin catalog controller should not create a new search
    # session in the blacklight context
    def start_new_search_session?
      super || params[:action] == 'admin'
    end

    def solr_document_params
      params.require(:solr_document).permit(:exhibit_tag_list,
                                            uploaded_resource: [:url],
                                            sidecar: [:public, data: [editable_solr_document_params]])
    end

    def editable_solr_document_params
      custom_field_params + uploaded_resource_params
    end

    def uploaded_resource_params
      if @document.uploaded_resource?
        [{ configured_fields: Spotlight::Resources::Upload.fields(current_exhibit).map(&:field_name) }]
      else
        []
      end
    end

    def custom_field_params
      current_exhibit.custom_fields.writeable.pluck(:field)
    end

    def check_authorization
      authorize! :curate, @exhibit
    end

    def redirect_to_exhibit_home_without_search_params!
      redirect_to spotlight.exhibit_root_path(@exhibit) unless has_search_parameters?
    end

    def add_breadcrumb_with_search_params
      add_breadcrumb t(:'spotlight.catalog.breadcrumb.index'), spotlight.search_exhibit_catalog_path(params.to_unsafe_h) if has_search_parameters?
    end

    # rubocop:disable Metrics/AbcSize
    def add_document_breadcrumbs(document)
      if current_browse_category
        add_breadcrumb current_browse_category.exhibit.main_navigations.browse.label_or_default, exhibit_browse_index_path(current_browse_category.exhibit)
        add_breadcrumb current_browse_category.title, exhibit_browse_path(current_browse_category.exhibit, current_browse_category)
      elsif current_page_context && current_page_context.title.present? && !current_page_context.is_a?(Spotlight::HomePage)
        add_breadcrumb current_page_context.title, [current_page_context.exhibit, current_page_context]
      elsif current_search_session
        add_breadcrumb t(:'spotlight.catalog.breadcrumb.index'), search_action_url(current_search_session.query_params)
      end

      add_breadcrumb Array(document[blacklight_config.view_config(:show).title_field]).join(', '), polymorphic_path([current_exhibit, document])
    end
    # rubocop:enable Metrics/AbcSize

    def additional_export_formats(document, format)
      super

      format.solr_json do
        authorize! :update_solr, @exhibit
        render json: document.to_solr.merge(@exhibit.solr_data)
      end
    end

    def try_solr_commit!
      repository.connection.commit
    rescue => e
      Rails.logger.info "Failed to commit document updates: #{e}"
    end
  end
end