/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.lucene.search;

import org.apache.lucene.document.Document;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.store.ByteBuffersDirectory;
import org.apache.lucene.store.Directory;
import org.apache.lucene.tests.util.LuceneTestCase;

public class TestDoubleValuesSourceRescorerScores extends LuceneTestCase {

  public void testRescoreWithScoresSource() throws Exception {
    try (Directory dir = new ByteBuffersDirectory()) {
      try (IndexWriter w = new IndexWriter(dir, new IndexWriterConfig())) {
        w.addDocument(new Document());
      }
      try (DirectoryReader reader = DirectoryReader.open(dir)) {
        IndexSearcher searcher = new IndexSearcher(reader);
        TopDocs firstPass = searcher.search(MatchAllDocsQuery.INSTANCE, 1);
        try {
          new DoubleValuesSourceRescorer(DoubleValuesSource.SCORES) {
            @Override
            protected float combine(float firstPassScore, boolean valuePresent, double value) {
              return (float) value;
            }
          }.rescore(searcher, firstPass, 1);
        } catch (IllegalArgumentException rejected) {
          // rejecting a source that needs scores up front would also be a valid fix
        } catch (AssertionError | RuntimeException e) {
          throw new AssertionError(
              "expected rescore() to supply scores to SCORES or reject it with"
                  + " IllegalArgumentException, but got "
                  + e,
              e);
        }
      }
    }
  }
}