/*
    * Copyright 2012-2025 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.score;
  
  import java.util.Map;
  
  import org.codelibs.core.lang.StringUtil;
  import org.codelibs.fess.mylasta.direction.FessConfig;
  import org.codelibs.fess.opensearch.query.StoredLtrQueryBuilder;
  import org.codelibs.fess.util.ComponentUtil;
  import org.opensearch.search.rescore.QueryRescorerBuilder;
  import org.opensearch.search.rescore.RescorerBuilder;
  
  /**
   * Learning to Rank query rescorer implementation.
   */
  public class LtrQueryRescorer implements QueryRescorer {
  
      /**
       * Default constructor.
       */
      public LtrQueryRescorer() {
          // Default constructor
      }
  
      @Override
      public RescorerBuilder<?> evaluate(final Map<String, Object> params) {
          final FessConfig fessConfig = ComponentUtil.getFessConfig();
          final String modelName = fessConfig.getLtrModelName();
          if (StringUtil.isBlank(modelName)) {
              return null;
          }
          return new QueryRescorerBuilder(new StoredLtrQueryBuilder().modelName(modelName).params(params))
                  .windowSize(fessConfig.getLtrWindowSize());
      }
  }