module DocumentSearch
  def document_search(search_params)
    search_params.each { |k, v| params[k] = v.gsub(/“|”/, '"') if v.is_a?(String) }
    fulltext_fields = %i[reference_number title short_title].freeze

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

      fulltext_fields.each do |field|
        fulltext search_params[field], fields: [field], query_phrase_slop: 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(sanitize_citer_finder_param(search_params[:citation_finder])) if search_params[:citation_finder].present?

      if search_params[:sort_by].blank?
        order_by :search_year, :desc
        order_by :search_doc_date, :desc
        order_by :reference_number, :desc
      end

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

    search
  end

  def sanitize_citer_finder_param(citation_finder_param)
    citation_finder = []
    params_vol = []
    params_type = []
    params_page = []
    params[:citation_finder].scan(/\b((\d+\-?\w?)\s(SCRA|PhilRep|Phil|\S+)\.?,?\s?([-,\d\s]+)?)\b/i).map do |cit_fin|
      params_vol << cit_fin[1].gsub(/\s+/, "").gsub(/\A0*/, "")
      params_type.concat(case cit_fin[2]
                          when /SCRA/i
                            ["SCRA"]
                          when /(PhilRep|Phil)\.?,?/i
                            ["Phil"]
                          else
                            []
      end
                        )
      cit_fin[3].scan(/\d+-?\d*/).each do |page|
        if page.match?(/-/)
          page_range = []
          page.scan(/\d+?\d*/).each do |each_page|
            page_range << each_page.to_i
          end
          params_page.concat((page_range[0]..page_range[1]).to_a)
        else
          params_page << page.to_i if params_page.index(page.to_i).blank?
        end
      end if cit_fin[3].present?
    end

    params_type.compact.each do |type|
      citation_finder << "#{params_vol[0] if params_vol.present?} #{type}" if params_page.blank?
      params_page.compact.uniq.each do |page|
        citation_finder << "#{params_vol[0] if params_vol.present?} #{type} #{page}"
      end
    end

    return [] if citation_finder.blank?
    citation_finder
  end
end