/*
 * 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.disambiguator;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;

import opennlp.tools.disambiguator.datareader.SemcorReaderExtended;
import opennlp.tools.disambiguator.datareader.SensevalReader;
import opennlp.tools.util.ObjectStream;
import opennlp.tools.util.TrainingParameters;

import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.fail;

// TODO improve the tests improve parameters
public class WSDEvaluatorTest {

  static SensevalReader seReader;

  static String modelsDir = "src/test/resources/models/";
  static String trainingDataDirectory = "src/test/resources/supervised/models/";

  static WSDDefaultParameters params = new WSDDefaultParameters("");
  static WSDisambiguatorME wsdME;
  static WSDModel model;

  static ArrayList<String> testWords;

  /*
   * Setup the testing variables
   */
  public static void setUpAndTraining() {
    WSDHelper.loadTokenizer(modelsDir + "en-token.bin");
    WSDHelper.loadLemmatizer(modelsDir + "en-lemmatizer.dict");
    WSDHelper.loadTagger(modelsDir + "en-pos-maxent.bin");

    seReader = new SensevalReader();
    testWords = seReader.getSensevalWords();
    params = new WSDDefaultParameters("");
    params.setTrainingDataDirectory(trainingDataDirectory);

    TrainingParameters trainingParams = new TrainingParameters();
    SemcorReaderExtended sr = new SemcorReaderExtended();

    WSDHelper.print("Training Started");
    for (String word : testWords) {
      // don't take verbs because they are not from WordNet
      if (!word.split("\\.")[1].equals("v")) {

        ArrayList<WSDSample> instances = seReader.getSensevalData(word);
        if (instances != null && instances.size() > 1) {
          WSDHelper.print("------------------" + word + "------------------");
          ObjectStream<WSDSample> sampleStream = sr.getSemcorDataStream(word);

          WSDModel writeModel = null;
    /*
     * Tests training the disambiguator We test both writing and reading a model
     * file trained by semcor
     */
          File outFile;
          try {
            writeModel = WSDisambiguatorME
              .train("en", sampleStream, trainingParams, params);
            assertNotNull("Checking the model to be written", writeModel);
            writeModel.writeModel(params.getTrainingDataDirectory() + word);
            outFile = new File(
              params.getTrainingDataDirectory() + word + ".wsd.model");
            model = new WSDModel(outFile);
            assertNotNull("Checking the read model", model);
            wsdME = new WSDisambiguatorME(model, params);
            assertNotNull("Checking the disambiguator", wsdME);
          } catch (IOException e1) {
            e1.printStackTrace();
            fail("Exception in training");
          }
        }
      }
    }
  }

  public static void disambiguationEval() {

    WSDHelper.print("Evaluation Started");

    for (String word : testWords) {
      WSDEvaluator evaluator = new WSDEvaluator(wsdME);

      // don't take verbs because they are not from WordNet
      if (!word.split("\\.")[1].equals("v")) {

        ArrayList<WSDSample> instances = seReader.getSensevalData(word);
        if (instances != null && instances.size() > 1) {
          WSDHelper.print("------------------" + word + "------------------");
          for (WSDSample instance : instances) {
            if (instance.getSenseIDs() != null && !instance.getSenseIDs()[0]
              .equals("null")) {
              evaluator.evaluateSample(instance);
            }
          }
          WSDHelper.print(evaluator.toString());
        } else {
          WSDHelper.print("null instances");
        }
      }

    }
  }

  public static void main(String[] args) {
    setUpAndTraining();
    disambiguationEval();
  }
}