/*
 * 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.
 */

package opennlp.tools.similarity.apps.taxo_builder;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;

import opennlp.tools.similarity.apps.utils.FileHandler;
import opennlp.tools.textsimilarity.chunker2matcher.ParserChunker2MatcherProcessor;

import com.thoughtworks.xstream.XStream;


/**
 * This class can be used to generate scores based on the overlapping between a text and a given taxonomy.
 *
 */
public class TaxoQuerySnapshotMatcher {
	
	ParserChunker2MatcherProcessor sm ;
    //XStream xStream= new XStream();
    Map<String, List<List<String>>> lemma_ExtendedAssocWords;
    TaxonomySerializer taxo;
    private static Logger LOG = Logger.getLogger("opennlp.tools.similarity.apps.taxo_builder.TaxoQuerySnapshotMatcher");
    
    
    public TaxoQuerySnapshotMatcher() {
    	sm = ParserChunker2MatcherProcessor.getInstance();
        taxo = TaxonomySerializer.readTaxonomy("src/test/resources/taxonomies/irs_domTaxo.dat");    	
	}
	/**
	 * Can be used to generate scores based on the overlapping between a text and a given taxonomy.
	 * @param query The query string the user used for ask a question.
	 * @param snapshot The abstract of a hit the system gave back
	 * @return
	 */
	public int getTaxoScore(String query, String snapshot){
   
		lemma_ExtendedAssocWords=(HashMap<String, List<List<String>>>) taxo.getLemma_ExtendedAssocWords();
	   
		query=query.toLowerCase();
		snapshot=snapshot.toLowerCase();
		String[] queryWords = sm.getTokenizer().tokenize(query);
		String[] snapshotWords = sm.getTokenizer().tokenize(snapshot);
		
		List<String> queryList = Arrays.asList(queryWords);
		List<String> snapshotList = Arrays.asList(snapshotWords);
		
		List<String> commonBetweenQuerySnapshot = (new ArrayList<String>(queryList));
		commonBetweenQuerySnapshot.retainAll(snapshotList);//Still could be duplicated words (even more if I would retain all the opposite ways)
	
		int score = 0;
		List<String> accumCommonParams = new ArrayList<String>(); 
		for(String qWord: commonBetweenQuerySnapshot){
			if (!lemma_ExtendedAssocWords.containsKey(qWord))
				continue;
			List<List<String>> foundParams = new ArrayList<List<String>>(); 
			foundParams=lemma_ExtendedAssocWords.get(qWord);
		
			for(List<String> paramsForGivenMeaning: foundParams){
				paramsForGivenMeaning.retainAll(queryList);
				paramsForGivenMeaning.retainAll(snapshotList);
				int size = paramsForGivenMeaning.size();
				
				if (size>0 && !accumCommonParams.containsAll(paramsForGivenMeaning)){
					score+=size;
					accumCommonParams.addAll(paramsForGivenMeaning);
				}
			}
		}	
		return score;
	}
	
	/**
	 * It loads a serialized taxonomy in .dat format and serializes it into a much more readable XML format. 
	 * @param taxonomyPath
	 * @param taxonomyXML_Path
	 * */
	 
	public void convertDatToXML(String taxonomyXML_Path, TaxonomySerializer taxo){
		XStream xStream = new XStream();
		FileHandler fileHandler = new FileHandler();
		try {
			fileHandler.writeToTextFile(xStream.toXML(taxo), taxonomyXML_Path, false);
		} catch (Exception e) {
				e.printStackTrace();
				LOG.info(e.toString());
		}
			
	} 
	
	public void xmlWork (){
		TaxoQuerySnapshotMatcher matcher = new TaxoQuerySnapshotMatcher();
		XStream xStream = new XStream();
		FileHandler fileHandler = new FileHandler();
		matcher.taxo = (TaxonomySerializer)xStream.fromXML(fileHandler.readFromTextFile("src/test/resources/taxo_English.xml"));
	}
	/**
	 * demonstrates the usage of the taxonomy matcher
	 * @param args
	 */
	static public void main(String[] args){

		TaxoQuerySnapshotMatcher matcher = new TaxoQuerySnapshotMatcher();

		System.out.println("The score is: "+matcher.getTaxoScore("Can Form 1040 EZ be used to claim the earned income credit.",
				"Can Form 1040EZ be used to claim the earned income credit? . Must I be entitled to claim a child as a dependent to claim the earned income credit based on the child being "));
		
		
	}
}