package org.apache.lucene.search.vectorhighlight;
/*
 * 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.
 */

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.ConstantScoreQuery;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.search.Filter;
import org.apache.lucene.search.FilteredQuery;
import org.apache.lucene.search.PhraseQuery;
import org.apache.lucene.search.PrefixQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.BooleanClause.Occur;
import org.apache.lucene.search.RegexpQuery;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TermRangeQuery;
import org.apache.lucene.search.WildcardQuery;
import org.apache.lucene.search.vectorhighlight.FieldQuery.QueryPhraseMap;
import org.apache.lucene.search.vectorhighlight.FieldTermStack.TermInfo;
import org.apache.lucene.util.Bits;
import org.apache.lucene.util.BytesRef;

public class FieldQueryTest extends AbstractTestCase {
  private float boost;

  /**
   * Set boost to a random value each time it is called.
   */
  private void initBoost() {
    boost = usually() ? 1F : random().nextFloat() * 10000;
  }

  public void testFlattenBoolean() throws Exception {
    initBoost();
    BooleanQuery booleanQuery = new BooleanQuery();
    booleanQuery.setBoost( boost );
    booleanQuery.add(tq("A"), Occur.MUST);
    booleanQuery.add(tq("B"), Occur.MUST);
    booleanQuery.add(tq("C"), Occur.SHOULD);

    BooleanQuery innerQuery = new BooleanQuery();
    innerQuery.add(tq("D"), Occur.MUST);
    innerQuery.add(tq("E"), Occur.MUST);
    booleanQuery.add(innerQuery, Occur.MUST_NOT);

    FieldQuery fq = new FieldQuery(booleanQuery, true, true );
    Set<Query> flatQueries = new HashSet<>();
    fq.flatten(booleanQuery, reader, flatQueries);
    assertCollectionQueries( flatQueries, tq( boost, "A" ), tq( boost, "B" ), tq( boost, "C" ) );
  }

  public void testFlattenDisjunctionMaxQuery() throws Exception {
    initBoost();
    Query query = dmq( tq( "A" ), tq( "B" ), pqF( "C", "D" ) );
    query.setBoost( boost );
    FieldQuery fq = new FieldQuery( query, true, true );
    Set<Query> flatQueries = new HashSet<>();
    fq.flatten( query, reader, flatQueries );
    assertCollectionQueries( flatQueries, tq( boost, "A" ), tq( boost, "B" ), pqF( boost, "C", "D" ) );
  }

  public void testFlattenTermAndPhrase() throws Exception {
    initBoost();
    BooleanQuery booleanQuery = new BooleanQuery();
    booleanQuery.setBoost( boost );
    booleanQuery.add(tq("A"), Occur.MUST);
    booleanQuery.add(pqF("B", "C"), Occur.MUST);

    FieldQuery fq = new FieldQuery(booleanQuery, true, true );
    Set<Query> flatQueries = new HashSet<>();
    fq.flatten(booleanQuery, reader, flatQueries);
    assertCollectionQueries( flatQueries, tq( boost, "A" ), pqF( boost, "B", "C" ) );
  }

  public void testFlattenTermAndPhrase2gram() throws Exception {
    BooleanQuery query = new BooleanQuery();
    query.add(new TermQuery(new Term(F, "AA")), Occur.MUST);
    query.add(toPhraseQuery(analyze("BCD", F, analyzerB), F), Occur.MUST);
    query.add(toPhraseQuery(analyze("EFGH", F, analyzerB), F), Occur.SHOULD);

    FieldQuery fq = new FieldQuery( query, true, true );
    Set<Query> flatQueries = new HashSet<>();
    fq.flatten( query, reader, flatQueries );
    assertCollectionQueries( flatQueries, tq( "AA" ), pqF( "BC", "CD" ), pqF( "EF", "FG", "GH" ) );
  }

  public void testFlatten1TermPhrase() throws Exception {
    Query query = pqF( "A" );
    FieldQuery fq = new FieldQuery( query, true, true );
    Set<Query> flatQueries = new HashSet<>();
    fq.flatten( query, reader, flatQueries );
    assertCollectionQueries( flatQueries, tq( "A" ) );
  }

  public void testExpand() throws Exception {
    Query dummy = pqF( "DUMMY" );
    FieldQuery fq = new FieldQuery( dummy, true, true );

    // "a b","b c" => "a b","b c","a b c"
    Set<Query> flatQueries = new HashSet<>();
    flatQueries.add( pqF( "a", "b" ) );
    flatQueries.add( pqF( "b", "c" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pqF( "a", "b" ), pqF( "b", "c" ), pqF( "a", "b", "c" ) );

    // "a b","b c d" => "a b","b c d","a b c d"
    flatQueries = new HashSet<>();
    flatQueries.add( pqF( "a", "b" ) );
    flatQueries.add( pqF( "b", "c", "d" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pqF( "a", "b" ), pqF( "b", "c", "d" ), pqF( "a", "b", "c", "d" ) );

    // "a b c","b c d" => "a b c","b c d","a b c d"
    flatQueries = new HashSet<>();
    flatQueries.add( pqF( "a", "b", "c" ) );
    flatQueries.add( pqF( "b", "c", "d" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pqF( "a", "b", "c" ), pqF( "b", "c", "d" ), pqF( "a", "b", "c", "d" ) );

    // "a b c","c d e" => "a b c","c d e","a b c d e"
    flatQueries = new HashSet<>();
    flatQueries.add( pqF( "a", "b", "c" ) );
    flatQueries.add( pqF( "c", "d", "e" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pqF( "a", "b", "c" ), pqF( "c", "d", "e" ), pqF( "a", "b", "c", "d", "e" ) );

    // "a b c d","b c" => "a b c d","b c"
    flatQueries = new HashSet<>();
    flatQueries.add( pqF( "a", "b", "c", "d" ) );
    flatQueries.add( pqF( "b", "c" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pqF( "a", "b", "c", "d" ), pqF( "b", "c" ) );

    // "a b b","b c" => "a b b","b c","a b b c"
    flatQueries = new HashSet<>();
    flatQueries.add( pqF( "a", "b", "b" ) );
    flatQueries.add( pqF( "b", "c" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pqF( "a", "b", "b" ), pqF( "b", "c" ), pqF( "a", "b", "b", "c" ) );

    // "a b","b a" => "a b","b a","a b a", "b a b"
    flatQueries = new HashSet<>();
    flatQueries.add( pqF( "a", "b" ) );
    flatQueries.add( pqF( "b", "a" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pqF( "a", "b" ), pqF( "b", "a" ), pqF( "a", "b", "a" ), pqF( "b", "a", "b" ) );

    // "a b","a b c" => "a b","a b c"
    flatQueries = new HashSet<>();
    flatQueries.add( pqF( "a", "b" ) );
    flatQueries.add( pqF( "a", "b", "c" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pqF( "a", "b" ), pqF( "a", "b", "c" ) );
  }

  public void testNoExpand() throws Exception {
    Query dummy = pqF( "DUMMY" );
    FieldQuery fq = new FieldQuery( dummy, true, true );

    // "a b","c d" => "a b","c d"
    Set<Query> flatQueries = new HashSet<>();
    flatQueries.add( pqF( "a", "b" ) );
    flatQueries.add( pqF( "c", "d" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pqF( "a", "b" ), pqF( "c", "d" ) );

    // "a","a b" => "a", "a b"
    flatQueries = new HashSet<>();
    flatQueries.add( tq( "a" ) );
    flatQueries.add( pqF( "a", "b" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        tq( "a" ), pqF( "a", "b" ) );

    // "a b","b" => "a b", "b"
    flatQueries = new HashSet<>();
    flatQueries.add( pqF( "a", "b" ) );
    flatQueries.add( tq( "b" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pqF( "a", "b" ), tq( "b" ) );

    // "a b c","b c" => "a b c","b c"
    flatQueries = new HashSet<>();
    flatQueries.add( pqF( "a", "b", "c" ) );
    flatQueries.add( pqF( "b", "c" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pqF( "a", "b", "c" ), pqF( "b", "c" ) );

    // "a b","a b c" => "a b","a b c"
    flatQueries = new HashSet<>();
    flatQueries.add( pqF( "a", "b" ) );
    flatQueries.add( pqF( "a", "b", "c" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pqF( "a", "b" ), pqF( "a", "b", "c" ) );

    // "a b c","b d e" => "a b c","b d e"
    flatQueries = new HashSet<>();
    flatQueries.add( pqF( "a", "b", "c" ) );
    flatQueries.add( pqF( "b", "d", "e" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pqF( "a", "b", "c" ), pqF( "b", "d", "e" ) );
  }

  public void testExpandNotFieldMatch() throws Exception {
    Query dummy = pqF( "DUMMY" );
    FieldQuery fq = new FieldQuery( dummy, true, false );

    // f1:"a b",f2:"b c" => f1:"a b",f2:"b c",f1:"a b c"
    Set<Query> flatQueries = new HashSet<>();
    flatQueries.add( pq( F1, "a", "b" ) );
    flatQueries.add( pq( F2, "b", "c" ) );
    assertCollectionQueries( fq.expand( flatQueries ),
        pq( F1, "a", "b" ), pq( F2, "b", "c" ), pq( F1, "a", "b", "c" ) );
  }

  public void testGetFieldTermMap() throws Exception {
    Query query = tq( "a" );
    FieldQuery fq = new FieldQuery( query, true, true );
    
    QueryPhraseMap pqm = fq.getFieldTermMap( F, "a" );
    assertNotNull( pqm );
    assertTrue( pqm.isTerminal() );
    
    pqm = fq.getFieldTermMap( F, "b" );
    assertNull( pqm );
    
    pqm = fq.getFieldTermMap( F1, "a" );
    assertNull( pqm );
  }

  public void testGetRootMap() throws Exception {
    Query dummy = pqF( "DUMMY" );
    FieldQuery fq = new FieldQuery( dummy, true, true );

    QueryPhraseMap rootMap1 = fq.getRootMap( tq( "a" ) );
    QueryPhraseMap rootMap2 = fq.getRootMap( tq( "a" ) );
    assertTrue( rootMap1 == rootMap2 );
    QueryPhraseMap rootMap3 = fq.getRootMap( tq( "b" ) );
    assertTrue( rootMap1 == rootMap3 );
    QueryPhraseMap rootMap4 = fq.getRootMap( tq( F1, "b" ) );
    assertFalse( rootMap4 == rootMap3 );
  }

  public void testGetRootMapNotFieldMatch() throws Exception {
    Query dummy = pqF( "DUMMY" );
    FieldQuery fq = new FieldQuery( dummy, true, false );

    QueryPhraseMap rootMap1 = fq.getRootMap( tq( "a" ) );
    QueryPhraseMap rootMap2 = fq.getRootMap( tq( "a" ) );
    assertTrue( rootMap1 == rootMap2 );
    QueryPhraseMap rootMap3 = fq.getRootMap( tq( "b" ) );
    assertTrue( rootMap1 == rootMap3 );
    QueryPhraseMap rootMap4 = fq.getRootMap( tq( F1, "b" ) );
    assertTrue( rootMap4 == rootMap3 );
  }

  public void testGetTermSet() throws Exception {
    BooleanQuery query = new BooleanQuery();
    query.add(new TermQuery(new Term(F, "A")), Occur.MUST);
    query.add(new TermQuery(new Term(F, "B")), Occur.MUST);
    query.add(new TermQuery(new Term("x", "C")), Occur.SHOULD);

    BooleanQuery innerQuery = new BooleanQuery();
    innerQuery.add(new TermQuery(new Term(F, "D")), Occur.MUST);
    innerQuery.add(new TermQuery(new Term(F, "E")), Occur.MUST);
    query.add(innerQuery, Occur.MUST_NOT);

    FieldQuery fq = new FieldQuery( query, true, true );
    assertEquals( 2, fq.termSetMap.size() );
    Set<String> termSet = fq.getTermSet( F );
    assertEquals( 2, termSet.size() );
    assertTrue( termSet.contains( "A" ) );
    assertTrue( termSet.contains( "B" ) );
    termSet = fq.getTermSet( "x" );
    assertEquals( 1, termSet.size() );
    assertTrue( termSet.contains( "C" ) );
    termSet = fq.getTermSet( "y" );
    assertNull( termSet );
  }
  
  public void testQueryPhraseMap1Term() throws Exception {
    Query query = tq( "a" );
    
    // phraseHighlight = true, fieldMatch = true
    FieldQuery fq = new FieldQuery( query, true, true );
    Map<String, QueryPhraseMap> map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( null ) );
    assertNotNull( map.get( F ) );
    QueryPhraseMap qpm = map.get( F );
    assertEquals( 1, qpm.subMap.size() );
    assertTrue( qpm.subMap.get( "a" ) != null );
    assertTrue( qpm.subMap.get( "a" ).terminal );
    assertEquals( 1F, qpm.subMap.get( "a" ).boost, 0);
    
    // phraseHighlight = true, fieldMatch = false
    fq = new FieldQuery( query, true, false );
    map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( F ) );
    assertNotNull( map.get( null ) );
    qpm = map.get( null );
    assertEquals( 1, qpm.subMap.size() );
    assertTrue( qpm.subMap.get( "a" ) != null );
    assertTrue( qpm.subMap.get( "a" ).terminal );
    assertEquals( 1F, qpm.subMap.get( "a" ).boost, 0);
    
    // phraseHighlight = false, fieldMatch = true
    fq = new FieldQuery( query, false, true );
    map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( null ) );
    assertNotNull( map.get( F ) );
    qpm = map.get( F );
    assertEquals( 1, qpm.subMap.size() );
    assertTrue( qpm.subMap.get( "a" ) != null );
    assertTrue( qpm.subMap.get( "a" ).terminal );
    assertEquals( 1F, qpm.subMap.get( "a" ).boost, 0);
    
    // phraseHighlight = false, fieldMatch = false
    fq = new FieldQuery( query, false, false );
    map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( F ) );
    assertNotNull( map.get( null ) );
    qpm = map.get( null );
    assertEquals( 1, qpm.subMap.size() );
    assertTrue( qpm.subMap.get( "a" ) != null );
    assertTrue( qpm.subMap.get( "a" ).terminal );
    assertEquals( 1F, qpm.subMap.get( "a" ).boost, 0);
    
    // boost != 1
    query = tq( 2, "a" );
    fq = new FieldQuery( query, true, true );
    map = fq.rootMaps;
    qpm = map.get( F );
    assertEquals( 2F, qpm.subMap.get( "a" ).boost, 0);
  }
  
  public void testQueryPhraseMap1Phrase() throws Exception {
    Query query = pqF( "a", "b" );
    
    // phraseHighlight = true, fieldMatch = true
    FieldQuery fq = new FieldQuery( query, true, true );
    Map<String, QueryPhraseMap> map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( null ) );
    assertNotNull( map.get( F ) );
    QueryPhraseMap qpm = map.get( F );
    assertEquals( 1, qpm.subMap.size() );
    assertNotNull( qpm.subMap.get( "a" ) );
    QueryPhraseMap qpm2 = qpm.subMap.get( "a" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "b" ) );
    QueryPhraseMap qpm3 = qpm2.subMap.get( "b" );
    assertTrue( qpm3.terminal );
    assertEquals( 1F, qpm3.boost, 0);
    
    // phraseHighlight = true, fieldMatch = false
    fq = new FieldQuery( query, true, false );
    map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( F ) );
    assertNotNull( map.get( null ) );
    qpm = map.get( null );
    assertEquals( 1, qpm.subMap.size() );
    assertNotNull( qpm.subMap.get( "a" ) );
    qpm2 = qpm.subMap.get( "a" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "b" ) );
    qpm3 = qpm2.subMap.get( "b" );
    assertTrue( qpm3.terminal );
    assertEquals( 1F, qpm3.boost, 0);
    
    // phraseHighlight = false, fieldMatch = true
    fq = new FieldQuery( query, false, true );
    map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( null ) );
    assertNotNull( map.get( F ) );
    qpm = map.get( F );
    assertEquals( 2, qpm.subMap.size() );
    assertNotNull( qpm.subMap.get( "a" ) );
    qpm2 = qpm.subMap.get( "a" );
    assertTrue( qpm2.terminal );
    assertEquals( 1F, qpm2.boost, 0);
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "b" ) );
    qpm3 = qpm2.subMap.get( "b" );
    assertTrue( qpm3.terminal );
    assertEquals( 1F, qpm3.boost, 0);

    assertNotNull( qpm.subMap.get( "b" ) );
    qpm2 = qpm.subMap.get( "b" );
    assertTrue( qpm2.terminal );
    assertEquals( 1F, qpm2.boost, 0);
    
    // phraseHighlight = false, fieldMatch = false
    fq = new FieldQuery( query, false, false );
    map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( F ) );
    assertNotNull( map.get( null ) );
    qpm = map.get( null );
    assertEquals( 2, qpm.subMap.size() );
    assertNotNull( qpm.subMap.get( "a" ) );
    qpm2 = qpm.subMap.get( "a" );
    assertTrue( qpm2.terminal );
    assertEquals( 1F, qpm2.boost, 0);
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "b" ) );
    qpm3 = qpm2.subMap.get( "b" );
    assertTrue( qpm3.terminal );
    assertEquals( 1F, qpm3.boost, 0);

    assertNotNull( qpm.subMap.get( "b" ) );
    qpm2 = qpm.subMap.get( "b" );
    assertTrue( qpm2.terminal );
    assertEquals( 1F, qpm2.boost, 0);

    // boost != 1
    query = pqF( 2, "a", "b" );
    // phraseHighlight = false, fieldMatch = false
    fq = new FieldQuery( query, false, false );
    map = fq.rootMaps;
    qpm = map.get( null );
    qpm2 = qpm.subMap.get( "a" );
    assertEquals( 2F, qpm2.boost, 0);
    qpm3 = qpm2.subMap.get( "b" );
    assertEquals( 2F, qpm3.boost, 0);
    qpm2 = qpm.subMap.get( "b" );
    assertEquals( 2F, qpm2.boost, 0);
  }
  
  public void testQueryPhraseMap1PhraseAnother() throws Exception {
    Query query = pqF( "search", "engines" );
    
    // phraseHighlight = true, fieldMatch = true
    FieldQuery fq = new FieldQuery( query, true, true );
    Map<String, QueryPhraseMap> map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( null ) );
    assertNotNull( map.get( F ) );
    QueryPhraseMap qpm = map.get( F );
    assertEquals( 1, qpm.subMap.size() );
    assertNotNull( qpm.subMap.get( "search" ) );
    QueryPhraseMap qpm2 = qpm.subMap.get( "search" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "engines" ) );
    QueryPhraseMap qpm3 = qpm2.subMap.get( "engines" );
    assertTrue( qpm3.terminal );
    assertEquals( 1F, qpm3.boost, 0);
  }
  
  public void testQueryPhraseMap2Phrases() throws Exception {
    BooleanQuery query = new BooleanQuery();
    query.add( pqF( "a", "b" ), Occur.SHOULD );
    query.add( pqF( 2, "c", "d" ), Occur.SHOULD );
    
    // phraseHighlight = true, fieldMatch = true
    FieldQuery fq = new FieldQuery( query, true, true );
    Map<String, QueryPhraseMap> map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( null ) );
    assertNotNull( map.get( F ) );
    QueryPhraseMap qpm = map.get( F );
    assertEquals( 2, qpm.subMap.size() );

    // "a b"
    assertNotNull( qpm.subMap.get( "a" ) );
    QueryPhraseMap qpm2 = qpm.subMap.get( "a" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "b" ) );
    QueryPhraseMap qpm3 = qpm2.subMap.get( "b" );
    assertTrue( qpm3.terminal );
    assertEquals( 1F, qpm3.boost, 0);

    // "c d"^2
    assertNotNull( qpm.subMap.get( "c" ) );
    qpm2 = qpm.subMap.get( "c" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "d" ) );
    qpm3 = qpm2.subMap.get( "d" );
    assertTrue( qpm3.terminal );
    assertEquals( 2F, qpm3.boost, 0);
  }
  
  public void testQueryPhraseMap2PhrasesFields() throws Exception {
    BooleanQuery query = new BooleanQuery();
    query.add( pq( F1, "a", "b" ), Occur.SHOULD );
    query.add( pq( 2F, F2, "c", "d" ), Occur.SHOULD );
    
    // phraseHighlight = true, fieldMatch = true
    FieldQuery fq = new FieldQuery( query, true, true );
    Map<String, QueryPhraseMap> map = fq.rootMaps;
    assertEquals( 2, map.size() );
    assertNull( map.get( null ) );

    // "a b"
    assertNotNull( map.get( F1 ) );
    QueryPhraseMap qpm = map.get( F1 );
    assertEquals( 1, qpm.subMap.size() );
    assertNotNull( qpm.subMap.get( "a" ) );
    QueryPhraseMap qpm2 = qpm.subMap.get( "a" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "b" ) );
    QueryPhraseMap qpm3 = qpm2.subMap.get( "b" );
    assertTrue( qpm3.terminal );
    assertEquals( 1F, qpm3.boost, 0);

    // "c d"^2
    assertNotNull( map.get( F2 ) );
    qpm = map.get( F2 );
    assertEquals( 1, qpm.subMap.size() );
    assertNotNull( qpm.subMap.get( "c" ) );
    qpm2 = qpm.subMap.get( "c" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "d" ) );
    qpm3 = qpm2.subMap.get( "d" );
    assertTrue( qpm3.terminal );
    assertEquals( 2F, qpm3.boost, 0);
    
    // phraseHighlight = true, fieldMatch = false
    fq = new FieldQuery( query, true, false );
    map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( F1 ) );
    assertNull( map.get( F2 ) );
    assertNotNull( map.get( null ) );
    qpm = map.get( null );
    assertEquals( 2, qpm.subMap.size() );

    // "a b"
    assertNotNull( qpm.subMap.get( "a" ) );
    qpm2 = qpm.subMap.get( "a" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "b" ) );
    qpm3 = qpm2.subMap.get( "b" );
    assertTrue( qpm3.terminal );
    assertEquals( 1F, qpm3.boost, 0);

    // "c d"^2
    assertNotNull( qpm.subMap.get( "c" ) );
    qpm2 = qpm.subMap.get( "c" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "d" ) );
    qpm3 = qpm2.subMap.get( "d" );
    assertTrue( qpm3.terminal );
    assertEquals( 2F, qpm3.boost, 0);
  }
  
  /*
   * <t>...terminal
   * 
   * a-b-c-<t>
   *     +-d-<t>
   * b-c-d-<t>
   * +-d-<t>
   */
  public void testQueryPhraseMapOverlapPhrases() throws Exception {
    BooleanQuery query = new BooleanQuery();
    query.add( pqF( "a", "b", "c" ), Occur.SHOULD );
    query.add( pqF( 2, "b", "c", "d" ), Occur.SHOULD );
    query.add( pqF( 3, "b", "d" ), Occur.SHOULD );
    
    // phraseHighlight = true, fieldMatch = true
    FieldQuery fq = new FieldQuery( query, true, true );
    Map<String, QueryPhraseMap> map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( null ) );
    assertNotNull( map.get( F ) );
    QueryPhraseMap qpm = map.get( F );
    assertEquals( 2, qpm.subMap.size() );

    // "a b c"
    assertNotNull( qpm.subMap.get( "a" ) );
    QueryPhraseMap qpm2 = qpm.subMap.get( "a" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "b" ) );
    QueryPhraseMap qpm3 = qpm2.subMap.get( "b" );
    assertFalse( qpm3.terminal );
    assertEquals( 1, qpm3.subMap.size() );
    assertNotNull( qpm3.subMap.get( "c" ) );
    QueryPhraseMap qpm4 = qpm3.subMap.get( "c" );
    assertTrue( qpm4.terminal );
    assertEquals( 1F, qpm4.boost, 0);
    assertNotNull( qpm4.subMap.get( "d" ) );
    QueryPhraseMap qpm5 = qpm4.subMap.get( "d" );
    assertTrue( qpm5.terminal );
    assertEquals( 1F, qpm5.boost, 0);

    // "b c d"^2, "b d"^3
    assertNotNull( qpm.subMap.get( "b" ) );
    qpm2 = qpm.subMap.get( "b" );
    assertFalse( qpm2.terminal );
    assertEquals( 2, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "c" ) );
    qpm3 = qpm2.subMap.get( "c" );
    assertFalse( qpm3.terminal );
    assertEquals( 1, qpm3.subMap.size() );
    assertNotNull( qpm3.subMap.get( "d" ) );
    qpm4 = qpm3.subMap.get( "d" );
    assertTrue( qpm4.terminal );
    assertEquals( 2F, qpm4.boost, 0);
    assertNotNull( qpm2.subMap.get( "d" ) );
    qpm3 = qpm2.subMap.get( "d" );
    assertTrue( qpm3.terminal );
    assertEquals( 3F, qpm3.boost, 0);
  }
  
  /*
   * <t>...terminal
   * 
   * a-b-<t>
   *   +-c-<t>
   */
  public void testQueryPhraseMapOverlapPhrases2() throws Exception {
    BooleanQuery query = new BooleanQuery();
    query.add( pqF( "a", "b" ), Occur.SHOULD );
    query.add( pqF( 2, "a", "b", "c" ), Occur.SHOULD );
    
    // phraseHighlight = true, fieldMatch = true
    FieldQuery fq = new FieldQuery( query, true, true );
    Map<String, QueryPhraseMap> map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( null ) );
    assertNotNull( map.get( F ) );
    QueryPhraseMap qpm = map.get( F );
    assertEquals( 1, qpm.subMap.size() );

    // "a b"
    assertNotNull( qpm.subMap.get( "a" ) );
    QueryPhraseMap qpm2 = qpm.subMap.get( "a" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "b" ) );
    QueryPhraseMap qpm3 = qpm2.subMap.get( "b" );
    assertTrue( qpm3.terminal );
    assertEquals( 1F, qpm3.boost, 0);

    // "a b c"^2
    assertEquals( 1, qpm3.subMap.size() );
    assertNotNull( qpm3.subMap.get( "c" ) );
    QueryPhraseMap qpm4 = qpm3.subMap.get( "c" );
    assertTrue( qpm4.terminal );
    assertEquals( 2F, qpm4.boost, 0);
  }
  
  /*
   * <t>...terminal
   * 
   * a-a-a-<t>
   *     +-a-<t>
   *       +-a-<t>
   *         +-a-<t>
   */
  public void testQueryPhraseMapOverlapPhrases3() throws Exception {
    BooleanQuery query = new BooleanQuery();
    query.add( pqF( "a", "a", "a", "a" ), Occur.SHOULD );
    query.add( pqF( 2, "a", "a", "a" ), Occur.SHOULD );
    
    // phraseHighlight = true, fieldMatch = true
    FieldQuery fq = new FieldQuery( query, true, true );
    Map<String, QueryPhraseMap> map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( null ) );
    assertNotNull( map.get( F ) );
    QueryPhraseMap qpm = map.get( F );
    assertEquals( 1, qpm.subMap.size() );

    // "a a a"
    assertNotNull( qpm.subMap.get( "a" ) );
    QueryPhraseMap qpm2 = qpm.subMap.get( "a" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "a" ) );
    QueryPhraseMap qpm3 = qpm2.subMap.get( "a" );
    assertFalse( qpm3.terminal );
    assertEquals( 1, qpm3.subMap.size() );
    assertNotNull( qpm3.subMap.get( "a" ) );
    QueryPhraseMap qpm4 = qpm3.subMap.get( "a" );
    assertTrue( qpm4.terminal );

    // "a a a a"
    assertEquals( 1, qpm4.subMap.size() );
    assertNotNull( qpm4.subMap.get( "a" ) );
    QueryPhraseMap qpm5 = qpm4.subMap.get( "a" );
    assertTrue( qpm5.terminal );

    // "a a a a a"
    assertEquals( 1, qpm5.subMap.size() );
    assertNotNull( qpm5.subMap.get( "a" ) );
    QueryPhraseMap qpm6 = qpm5.subMap.get( "a" );
    assertTrue( qpm6.terminal );

    // "a a a a a a"
    assertEquals( 1, qpm6.subMap.size() );
    assertNotNull( qpm6.subMap.get( "a" ) );
    QueryPhraseMap qpm7 = qpm6.subMap.get( "a" );
    assertTrue( qpm7.terminal );
  }
  
  public void testQueryPhraseMapOverlap2gram() throws Exception {
    BooleanQuery query = new BooleanQuery();
    query.add(toPhraseQuery(analyze("abc", F, analyzerB), F), Occur.MUST);
    query.add(toPhraseQuery(analyze("bcd", F, analyzerB), F), Occur.MUST);

    // phraseHighlight = true, fieldMatch = true
    FieldQuery fq = new FieldQuery( query, true, true );
    Map<String, QueryPhraseMap> map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( null ) );
    assertNotNull( map.get( F ) );
    QueryPhraseMap qpm = map.get( F );
    assertEquals( 2, qpm.subMap.size() );

    // "ab bc"
    assertNotNull( qpm.subMap.get( "ab" ) );
    QueryPhraseMap qpm2 = qpm.subMap.get( "ab" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "bc" ) );
    QueryPhraseMap qpm3 = qpm2.subMap.get( "bc" );
    assertTrue( qpm3.terminal );
    assertEquals( 1F, qpm3.boost, 0);

    // "ab bc cd"
    assertEquals( 1, qpm3.subMap.size() );
    assertNotNull( qpm3.subMap.get( "cd" ) );
    QueryPhraseMap qpm4 = qpm3.subMap.get( "cd" );
    assertTrue( qpm4.terminal );
    assertEquals( 1F, qpm4.boost, 0);

    // "bc cd"
    assertNotNull( qpm.subMap.get( "bc" ) );
    qpm2 = qpm.subMap.get( "bc" );
    assertFalse( qpm2.terminal );
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "cd" ) );
    qpm3 = qpm2.subMap.get( "cd" );
    assertTrue( qpm3.terminal );
    assertEquals( 1F, qpm3.boost, 0);
    
    // phraseHighlight = false, fieldMatch = true
    fq = new FieldQuery( query, false, true );
    map = fq.rootMaps;
    assertEquals( 1, map.size() );
    assertNull( map.get( null ) );
    assertNotNull( map.get( F ) );
    qpm = map.get( F );
    assertEquals( 3, qpm.subMap.size() );

    // "ab bc"
    assertNotNull( qpm.subMap.get( "ab" ) );
    qpm2 = qpm.subMap.get( "ab" );
    assertTrue( qpm2.terminal );
    assertEquals( 1F, qpm2.boost, 0);
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "bc" ) );
    qpm3 = qpm2.subMap.get( "bc" );
    assertTrue( qpm3.terminal );
    assertEquals( 1F, qpm3.boost, 0);

    // "ab bc cd"
    assertEquals( 1, qpm3.subMap.size() );
    assertNotNull( qpm3.subMap.get( "cd" ) );
    qpm4 = qpm3.subMap.get( "cd" );
    assertTrue( qpm4.terminal );
    assertEquals( 1F, qpm4.boost, 0);

    // "bc cd"
    assertNotNull( qpm.subMap.get( "bc" ) );
    qpm2 = qpm.subMap.get( "bc" );
    assertTrue( qpm2.terminal );
    assertEquals( 1F, qpm2.boost, 0);
    assertEquals( 1, qpm2.subMap.size() );
    assertNotNull( qpm2.subMap.get( "cd" ) );
    qpm3 = qpm2.subMap.get( "cd" );
    assertTrue( qpm3.terminal );
    assertEquals( 1F, qpm3.boost, 0);

    // "cd"
    assertNotNull( qpm.subMap.get( "cd" ) );
    qpm2 = qpm.subMap.get( "cd" );
    assertTrue( qpm2.terminal );
    assertEquals( 1F, qpm2.boost, 0);
    assertEquals( 0, qpm2.subMap.size() );
  }
  
  public void testSearchPhrase() throws Exception {
    Query query = pqF( "a", "b", "c" );

    // phraseHighlight = true, fieldMatch = true
    FieldQuery fq = new FieldQuery( query, true, true );
    
    // "a"
    List<TermInfo> phraseCandidate = new ArrayList<>();
    phraseCandidate.add( new TermInfo( "a", 0, 1, 0, 1 ) );
    assertNull( fq.searchPhrase( F, phraseCandidate ) );
    // "a b"
    phraseCandidate.add( new TermInfo( "b", 2, 3, 1, 1 ) );
    assertNull( fq.searchPhrase( F, phraseCandidate ) );
    // "a b c"
    phraseCandidate.add( new TermInfo( "c", 4, 5, 2, 1 ) );
    assertNotNull( fq.searchPhrase( F, phraseCandidate ) );
    assertNull( fq.searchPhrase( "x", phraseCandidate ) );

    // phraseHighlight = true, fieldMatch = false
    fq = new FieldQuery( query, true, false );
    
    // "a b c"
    assertNotNull( fq.searchPhrase( F, phraseCandidate ) );
    assertNotNull( fq.searchPhrase( "x", phraseCandidate ) );

    // phraseHighlight = false, fieldMatch = true
    fq = new FieldQuery( query, false, true );
    
    // "a"
    phraseCandidate.clear();
    phraseCandidate.add( new TermInfo( "a", 0, 1, 0, 1 ) );
    assertNotNull( fq.searchPhrase( F, phraseCandidate ) );
    // "a b"
    phraseCandidate.add( new TermInfo( "b", 2, 3, 1, 1 ) );
    assertNull( fq.searchPhrase( F, phraseCandidate ) );
    // "a b c"
    phraseCandidate.add( new TermInfo( "c", 4, 5, 2, 1 ) );
    assertNotNull( fq.searchPhrase( F, phraseCandidate ) );
    assertNull( fq.searchPhrase( "x", phraseCandidate ) );
  }
  
  public void testSearchPhraseSlop() throws Exception {
    // "a b c"~0
    Query query = pqF( "a", "b", "c" );

    // phraseHighlight = true, fieldMatch = true
    FieldQuery fq = new FieldQuery( query, true, true );
    
    // "a b c" w/ position-gap = 2
    List<TermInfo> phraseCandidate = new ArrayList<>();
    phraseCandidate.add( new TermInfo( "a", 0, 1, 0, 1 ) );
    phraseCandidate.add( new TermInfo( "b", 2, 3, 2, 1 ) );
    phraseCandidate.add( new TermInfo( "c", 4, 5, 4, 1 ) );
    assertNull( fq.searchPhrase( F, phraseCandidate ) );

    // "a b c"~1
    query = pqF( 1F, 1, "a", "b", "c" );

    // phraseHighlight = true, fieldMatch = true
    fq = new FieldQuery( query, true, true );
    
    // "a b c" w/ position-gap = 2
    assertNotNull( fq.searchPhrase( F, phraseCandidate ) );
    
    // "a b c" w/ position-gap = 3
    phraseCandidate.clear();
    phraseCandidate.add( new TermInfo( "a", 0, 1, 0, 1 ) );
    phraseCandidate.add( new TermInfo( "b", 2, 3, 3, 1 ) );
    phraseCandidate.add( new TermInfo( "c", 4, 5, 6, 1 ) );
    assertNull( fq.searchPhrase( F, phraseCandidate ) );
  }
  
  public void testHighlightQuery() throws Exception {
    makeIndexStrMV();
    defgMultiTermQueryTest(new WildcardQuery(new Term(F, "d*g")));
  }

  public void testPrefixQuery() throws Exception {
    makeIndexStrMV();
    defgMultiTermQueryTest(new PrefixQuery(new Term(F, "de")));
  }
  
  public void testRegexpQuery() throws Exception {
    makeIndexStrMV();
    Term term = new Term(F, "d[a-z].g");
    defgMultiTermQueryTest(new RegexpQuery (term));
  }

  public void testRangeQuery() throws Exception {
    makeIndexStrMV();
    defgMultiTermQueryTest(new TermRangeQuery (F, new BytesRef("d"), new BytesRef("e"), true, true));
  }

  private void defgMultiTermQueryTest(Query query) throws IOException {
    FieldQuery fq = new FieldQuery( query, reader, true, true );
    QueryPhraseMap qpm = fq.getFieldTermMap(F, "defg");
    assertNotNull (qpm);
    assertNull (fq.getFieldTermMap(F, "dog"));
    List<TermInfo> phraseCandidate = new ArrayList<>();
    phraseCandidate.add( new TermInfo( "defg", 0, 12, 0, 1 ) );
    assertNotNull (fq.searchPhrase(F, phraseCandidate));
  }
  
  public void testStopRewrite() throws Exception {
    Query q = new Query() {

      @Override
      public String toString(String field) {
        return "DummyQuery";
      }
      
    };
    make1d1fIndex( "a" );
    assertNotNull(reader);
    new FieldQuery(q, reader, true, true );
  }
  
  public void testFlattenFilteredQuery() throws Exception {
    initBoost();
    Query query = new FilteredQuery(pqF( "A" ), new Filter() {
      @Override
      public DocIdSet getDocIdSet(AtomicReaderContext context, Bits acceptDocs)
          throws IOException {
        return null;
      }
    });
    query.setBoost(boost);
    FieldQuery fq = new FieldQuery( query, true, true );
    Set<Query> flatQueries = new HashSet<>();
    fq.flatten( query, reader, flatQueries );
    assertCollectionQueries( flatQueries, tq( boost, "A" ) );
  }
  
  public void testFlattenConstantScoreQuery() throws Exception {
    initBoost();
    Query query = new ConstantScoreQuery(pqF( "A" ));
    query.setBoost(boost);
    FieldQuery fq = new FieldQuery( query, true, true );
    Set<Query> flatQueries = new HashSet<>();
    fq.flatten( query, reader, flatQueries );
    assertCollectionQueries( flatQueries, tq( boost, "A" ) );
  }
  
}
