/*
 * 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.facet.range;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.NumericDocValuesField;
import org.apache.lucene.facet.FacetResult;
import org.apache.lucene.facet.FacetsCollector;
import org.apache.lucene.facet.FacetsCollectorManager;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.LongValuesSource;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.store.ByteBuffersDirectory;
import org.apache.lucene.store.Directory;
import org.apache.lucene.tests.util.LuceneTestCase;

public class TestLongRangeFacetFastMatchTotal extends LuceneTestCase {

  public void testFastMatchQueryDoesNotInflateTotal() throws Exception {
    try (Directory dir = new ByteBuffersDirectory()) {
      try (IndexWriter w = new IndexWriter(dir, new IndexWriterConfig())) {
        for (long v : new long[] {0, 10, 20}) {
          Document doc = new Document();
          doc.add(new NumericDocValuesField("v", v));
          w.addDocument(doc);
        }
      }
      try (DirectoryReader reader = DirectoryReader.open(dir)) {
        FacetsCollector fc =
            new IndexSearcher(reader).search(MatchAllDocsQuery.INSTANCE, new FacetsCollectorManager());
        FacetResult result =
            new LongRangeFacetCounts(
                    "v",
                    LongValuesSource.fromLongField("v"),
                    fc,
                    NumericDocValuesField.newSlowRangeQuery("v", 0, 5),
                    new LongRange("0-5", 0, true, 5, true))
                .getAllChildren("v");
        // only v=0 is in a range, so expected total 1; actual 3 (the 2 hits the fastMatchQuery rejects are kept)
        assertEquals(1, result.value.intValue());
      }
    }
  }
}