/*
 * 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.misc.index;

import java.nio.file.Path;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.KnnFloatVectorField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.FSDirectory;
import org.apache.lucene.tests.util.LuceneTestCase;
import org.apache.lucene.util.Version;

public class TestBpVectorReorderEarlierMajorIndex extends LuceneTestCase {

  public void testReorderIndexCreatedByPreviousMajor() throws Exception {
    Path path = createTempDir();
    try (Directory dir = FSDirectory.open(path)) {
      IndexWriterConfig iwc =
          new IndexWriterConfig().setIndexCreatedVersionMajor(Version.LATEST.major - 1);
      try (IndexWriter w = new IndexWriter(dir, iwc)) {
        Document doc = new Document();
        doc.add(new KnnFloatVectorField("f", new float[] {1, 1}));
        w.addDocument(doc);
      }
      // expected: the 10.x-created index is reordered; actual: IllegalArgumentException
      BpVectorReorderer.main(path.toString(), "f", "--thread-count", "1");
      try (DirectoryReader reader = DirectoryReader.open(dir)) {
        assertEquals(1, reader.numDocs());
      }
    }
  }
}