﻿// Lucene version compatibility level 8.2.0
using Lucene.Net.Analysis.Payloads;
using Lucene.Net.Analysis.Util;
using NUnit.Framework;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Lucene.Net.Analysis.OpenNlp
{
    /*
     * 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.
     */

    /// <summary>
    /// Needs the OpenNLP Tokenizer because it creates full streams of punctuation.
    /// Needs the OpenNLP POS tagger for the POS tags.
    /// <para/>
    /// Tagging models are created from tiny test data in opennlp/tools/test-model-data/ and are not very accurate.
    /// </summary>
    public class TestOpenNLPChunkerFilterFactory : BaseTokenStreamTestCase
    {
        private const String SENTENCES = "Sentence number 1 has 6 words. Sentence number 2, 5 words.";
        private static readonly String[] SENTENCES_punc
            = { "Sentence", "number", "1", "has", "6", "words", ".", "Sentence", "number", "2", ",", "5", "words", "." };
        private static readonly int[] SENTENCES_startOffsets = { 0, 9, 16, 18, 22, 24, 29, 31, 40, 47, 48, 50, 52, 57 };
        private static readonly int[] SENTENCES_endOffsets = { 8, 15, 17, 21, 23, 29, 30, 39, 46, 48, 49, 51, 57, 58 };
        private static readonly String[] SENTENCES_chunks
            = { "B-NP", "I-NP", "I-NP", "B-VP", "B-NP", "I-NP", "O", "B-NP", "I-NP", "I-NP", "O", "B-NP", "I-NP", "O" };

        private const String sentenceModelFile = "en-test-sent.bin";
        private const String tokenizerModelFile = "en-test-tokenizer.bin";
        private const String posTaggerModelFile = "en-test-pos-maxent.bin";
        private const String chunkerModelFile = "en-test-chunker.bin";

        private static byte[][] ToPayloads(params string[] strings)
        {
            return strings.Select(s => s == null ? null : Encoding.UTF8.GetBytes(s)).ToArray();
        }

        [Test]
        public void TestBasic()
        {
            //    CustomAnalyzer analyzer = CustomAnalyzer.builder(new ClasspathResourceLoader(getClass()))
            //.withTokenizer("opennlp", "tokenizerModel", tokenizerModelFile, "sentenceModel", sentenceModelFile)
            //.addTokenFilter("opennlpPOS", "posTaggerModel", posTaggerModelFile)
            //.addTokenFilter("opennlpChunker", "chunkerModel", chunkerModelFile)
            //.build();

            Analyzer analyzer = Analyzer.NewAnonymous(createComponents: (fieldName, reader) =>
            {
                var loader = new ClasspathResourceLoader(GetType());

                var opennlpFactory = new OpenNLPTokenizerFactory(new Dictionary<string, string> { { "tokenizerModel", tokenizerModelFile }, { "sentenceModel", sentenceModelFile } });
                opennlpFactory.Inform(loader);
                var opennlp = opennlpFactory.Create(NewAttributeFactory(), reader); //new OpenNLPTokenizer(reader, new Tools.NLPSentenceDetectorOp(sentenceModelFile), new Tools.NLPTokenizerOp(tokenizerModelFile));

                var opennlpPOSFilterFactory = new OpenNLPPOSFilterFactory(new Dictionary<string, string> { { "posTaggerModel", posTaggerModelFile } });
                opennlpPOSFilterFactory.Inform(loader);
                var opennlpPOSFilter = opennlpPOSFilterFactory.Create(opennlp);  //new OpenNLPPOSFilter(opennlp, new Tools.NLPPOSTaggerOp(posTaggerModelFile));

                var opennlpChunkerFilterFactory = new OpenNLPChunkerFilterFactory(new Dictionary<string, string> { { "chunkerModel", chunkerModelFile } });
                opennlpChunkerFilterFactory.Inform(loader);
                var opennlpChunkerFilter = opennlpChunkerFilterFactory.Create(opennlpPOSFilter);  //new OpenNLPChunkerFilter(filter1, new Tools.NLPChunkerOp(chunkerModelFile));

                return new TokenStreamComponents(opennlp, opennlpChunkerFilter);
            });

            AssertAnalyzesTo(analyzer, SENTENCES, SENTENCES_punc, SENTENCES_startOffsets, SENTENCES_endOffsets,
                SENTENCES_chunks, null, null, true);
        }

        [Test]
        public void TestPayloads()
        {
            //CustomAnalyzer analyzer = CustomAnalyzer.builder(new ClasspathResourceLoader(getClass()))
            //.withTokenizer("opennlp", "tokenizerModel", tokenizerModelFile, "sentenceModel", sentenceModelFile)
            //.addTokenFilter("opennlpPOS", "posTaggerModel", posTaggerModelFile)
            //.addTokenFilter("opennlpChunker", "chunkerModel", chunkerModelFile)
            //.addTokenFilter(TypeAsPayloadTokenFilterFactory.class)
            //.build();

            Analyzer analyzer = Analyzer.NewAnonymous(createComponents: (fieldName, reader) =>
            {
                var loader = new ClasspathResourceLoader(GetType());

                var opennlpFactory = new OpenNLPTokenizerFactory(new Dictionary<string, string> { { "tokenizerModel", tokenizerModelFile }, { "sentenceModel", sentenceModelFile } });
                opennlpFactory.Inform(loader);
                var opennlp = opennlpFactory.Create(NewAttributeFactory(), reader); //new OpenNLPTokenizer(reader, new Tools.NLPSentenceDetectorOp(sentenceModelFile), new Tools.NLPTokenizerOp(tokenizerModelFile));

                var opennlpPOSFilterFactory = new OpenNLPPOSFilterFactory(new Dictionary<string, string> { { "posTaggerModel", posTaggerModelFile } });
                opennlpPOSFilterFactory.Inform(loader);
                var opennlpPOSFilter = opennlpPOSFilterFactory.Create(opennlp);  //new OpenNLPPOSFilter(opennlp, new Tools.NLPPOSTaggerOp(posTaggerModelFile));

                var opennlpChunkerFilterFactory = new OpenNLPChunkerFilterFactory(new Dictionary<string, string> { { "chunkerModel", chunkerModelFile } });
                opennlpChunkerFilterFactory.Inform(loader);
                var opennlpChunkerFilter = opennlpChunkerFilterFactory.Create(opennlpPOSFilter);  //new OpenNLPChunkerFilter(filter1, new Tools.NLPChunkerOp(chunkerModelFile));

                var typeAsPayloadFilterFactory = new TypeAsPayloadTokenFilterFactory(new Dictionary<string, string>());
                var typeAsPayloadFilter = typeAsPayloadFilterFactory.Create(opennlpChunkerFilter);

                return new TokenStreamComponents(opennlp, typeAsPayloadFilter);
            });
            AssertAnalyzesTo(analyzer, SENTENCES, SENTENCES_punc, SENTENCES_startOffsets, SENTENCES_endOffsets,
                null, null, null, true, ToPayloads(SENTENCES_chunks));
        }
    }
}