/*
 * 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.
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package org.apache.lucene.facet.taxonomy;

import org.apache.lucene.document.Document;
import org.apache.lucene.facet.FacetsCollector;
import org.apache.lucene.facet.FacetsCollectorManager;
import org.apache.lucene.facet.FacetsConfig;
import org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyReader;
import org.apache.lucene.facet.taxonomy.directory.DirectoryTaxonomyWriter;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.store.Directory;
import org.apache.lucene.tests.util.LuceneTestCase;

public class TestIntAssociationSumOverflow extends LuceneTestCase {

  public void testSumAboveIntMax() throws Exception {
    try (Directory dir = newDirectory();
        Directory taxoDir = newDirectory()) {
      FacetsConfig config = new FacetsConfig();
      try (IndexWriter w = new IndexWriter(dir, newIndexWriterConfig());
          DirectoryTaxonomyWriter tw = new DirectoryTaxonomyWriter(taxoDir)) {
        for (int value : new int[] {1_500_000_000, 1_000_000_000}) {
          Document doc = new Document();
          doc.add(new IntAssociationFacetField(value, "dim", "a"));
          w.addDocument(config.build(tw, doc));
        }
      }
      try (DirectoryReader r = DirectoryReader.open(dir);
          DirectoryTaxonomyReader tr = new DirectoryTaxonomyReader(taxoDir)) {
        FacetsCollector fc =
            new IndexSearcher(r).search(new MatchAllDocsQuery(), new FacetsCollectorManager());
        TaxonomyFacetIntAssociations facets =
            new TaxonomyFacetIntAssociations(
                FacetsConfig.DEFAULT_INDEX_FIELD_NAME,
                tr,
                config,
                fc,
                AssociationAggregationFunction.SUM);
        assertEquals(2_500_000_000L, facets.getSpecificValue("dim", "a").longValue());
      }
    }
  }
}