/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch 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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/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.common.lucene.search;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.store.ByteBuffersDirectory;
import org.opensearch.common.lucene.Lucene;
import org.opensearch.test.OpenSearchTestCase;

import static org.hamcrest.Matchers.equalTo;

public class MultiPhrasePrefixQueryTests extends OpenSearchTestCase {
    public void testSimple() throws Exception {
        IndexWriter writer = new IndexWriter(new ByteBuffersDirectory(), new IndexWriterConfig(Lucene.STANDARD_ANALYZER));
        Document doc = new Document();
        doc.add(new Field("field", "aaa bbb ccc ddd", TextField.TYPE_NOT_STORED));
        writer.addDocument(doc);
        IndexReader reader = DirectoryReader.open(writer);
        IndexSearcher searcher = new IndexSearcher(reader);

        MultiPhrasePrefixQuery query = new MultiPhrasePrefixQuery("field");
        query.add(new Term("field", "aa"));
        assertThat(searcher.count(query), equalTo(1));

        query = new MultiPhrasePrefixQuery("field");
        query.add(new Term("field", "aaa"));
        query.add(new Term("field", "bb"));
        assertThat(searcher.count(query), equalTo(1));

        query = new MultiPhrasePrefixQuery("field");
        query.setSlop(1);
        query.add(new Term("field", "aaa"));
        query.add(new Term("field", "cc"));
        assertThat(searcher.count(query), equalTo(1));

        query = new MultiPhrasePrefixQuery("field");
        query.setSlop(1);
        query.add(new Term("field", "xxx"));
        assertThat(searcher.count(query), equalTo(0));
    }
}