/*
    * Copyright 2012-2017 CodeLibs Project and the Others.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *     http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied. See the License for the specific language
   * governing permissions and limitations under the License.
   */
  package org.codelibs.fess.entity;
  
  import static org.codelibs.core.stream.StreamUtil.stream;
  
  import java.util.Locale;
  import java.util.Map;
  
  import javax.servlet.http.HttpServletRequest;
  
  import org.codelibs.core.lang.StringUtil;
  
  public interface SearchRequestParams {
  
      String getQuery();
  
      Map<String, String[]> getFields();
  
      String[] getLanguages();
  
      GeoInfo getGeoInfo();
  
      FacetInfo getFacetInfo();
  
      String getSort();
  
      int getStartPosition();
  
      int getPageSize();
  
      String[] getExtraQueries();
  
      Object getAttribute(String name);
  
      Locale getLocale();
  
      SearchRequestType getType();
  
      String getSimilarDocHash();
  
      public default String[] simplifyArray(final String[] values) {
          return stream(values).get(stream -> stream.filter(StringUtil::isNotBlank).distinct().toArray(n -> new String[n]));
      }
  
      public default String[] getParamValueArray(final HttpServletRequest request, final String param) {
          return simplifyArray(request.getParameterValues(param));
      }
  
      public default FacetInfo createFacetInfo(final HttpServletRequest request) {
          final String[] fields = getParamValueArray(request, "facet.field");
          final String[] queries = getParamValueArray(request, "facet.query");
          if (fields.length == 0 && queries.length == 0) {
              return null;
          }
          final FacetInfo facetInfo = new FacetInfo();
          facetInfo.field = fields;
          facetInfo.query = queries;
          final String sizeStr = request.getParameter("facet.size");
          if (StringUtil.isNotBlank(sizeStr)) {
              facetInfo.size = Integer.parseInt(sizeStr);
          }
          final String minDocCountStr = request.getParameter("facet.minDocCount");
          if (StringUtil.isNotBlank(minDocCountStr)) {
              facetInfo.minDocCount = Long.parseLong(minDocCountStr);
          }
          final String sort = request.getParameter("facet.sort");
          if (StringUtil.isNotBlank(sort)) {
              facetInfo.sort = sort;
          }
          final String missing = request.getParameter("facet.missing");
          if (StringUtil.isNotBlank(missing)) {
              facetInfo.missing = missing;
          }
          return facetInfo;
      }
  
      public default GeoInfo createGeoInfo(final HttpServletRequest request) {
          return new GeoInfo(request);
      }
  
      public enum SearchRequestType {
          SEARCH, ADMIN_SEARCH, JSON, GSA, SUGGEST;
      }
  }