/* 
 * 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.
 */

using System;

using NUnit.Framework;

using SimpleAnalyzer = Lucene.Net.Analysis.SimpleAnalyzer;
using Lucene.Net.Documents;
using IndexReader = Lucene.Net.Index.IndexReader;
using IndexWriter = Lucene.Net.Index.IndexWriter;
using Term = Lucene.Net.Index.Term;
using RAMDirectory = Lucene.Net.Store.RAMDirectory;
using LuceneTestCase = Lucene.Net.Util.LuceneTestCase;

namespace Lucene.Net.Search
{
    
    /// <summary>Document boost unit test.</summary>
    /// <version>$Revision: 832972 $</version>
    [TestFixture]
    public class TestSetNorm:LuceneTestCase
    {
        private class AnonymousClassCollector:Collector
        {
            public AnonymousClassCollector(float[] scores, TestSetNorm enclosingInstance)
            {
                InitBlock(scores, enclosingInstance);
            }
            private void  InitBlock(float[] scores, TestSetNorm enclosingInstance)
            {
                this.scores = scores;
                this.enclosingInstance = enclosingInstance;
            }
            private float[] scores;
            private TestSetNorm enclosingInstance;
            public TestSetNorm Enclosing_Instance
            {
                get
                {
                    return enclosingInstance;
                }
                
            }
            private int base_Renamed = 0;
            private Scorer scorer;
            public override void  SetScorer(Scorer scorer)
            {
                this.scorer = scorer;
            }
            public override void  Collect(int doc)
            {
                scores[doc + base_Renamed] = scorer.Score();
            }
            public override void  SetNextReader(IndexReader reader, int docBase)
            {
                base_Renamed = docBase;
            }

            public override bool AcceptsDocsOutOfOrder
            {
                get { return true; }
            }
        }
        
        [Test]
        public virtual void  TestSetNorm_Renamed()
        {
            RAMDirectory store = new RAMDirectory();
            IndexWriter writer = new IndexWriter(store, new SimpleAnalyzer(), true, IndexWriter.MaxFieldLength.LIMITED);
            
            // add the same document four times
            IFieldable f1 = new Field("field", "word", Field.Store.YES, Field.Index.ANALYZED);
            Document d1 = new Document();
            d1.Add(f1);
            writer.AddDocument(d1);
            writer.AddDocument(d1);
            writer.AddDocument(d1);
            writer.AddDocument(d1);
            writer.Close();
            
            // reset the boost of each instance of this document
            IndexReader reader = IndexReader.Open(store, false);
            reader.SetNorm(0, "field", 1.0f);
            reader.SetNorm(1, "field", 2.0f);
            reader.SetNorm(2, "field", 4.0f);
            reader.SetNorm(3, "field", 16.0f);
            reader.Close();
            
            // check that searches are ordered by this boost
            float[] scores = new float[4];
            
            new IndexSearcher(store, true).Search(new TermQuery(new Term("field", "word")), new AnonymousClassCollector(scores, this));
            
            float lastScore = 0.0f;
            
            for (int i = 0; i < 4; i++)
            {
                Assert.IsTrue(scores[i] > lastScore);
                lastScore = scores[i];
            }
        }
    }
}