/*
 * 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 org.apache.uima.cas.test;

import static java.nio.charset.StandardCharsets.UTF_8;
import static org.assertj.core.api.Assertions.assertThat;
import static org.junit.Assert.assertTrue;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;

import org.apache.uima.UIMAFramework;
import org.apache.uima.analysis_engine.AnalysisEngine;
import org.apache.uima.cas.CAS;
import org.apache.uima.cas.CASException;
import org.apache.uima.cas.FSIterator;
import org.apache.uima.cas.FeatureStructure;
import org.apache.uima.cas.Type;
import org.apache.uima.cas.TypeSystem;
import org.apache.uima.cas.admin.CASFactory;
import org.apache.uima.cas.admin.CASMgr;
import org.apache.uima.cas.admin.FSIndexRepositoryMgr;
import org.apache.uima.cas.admin.LinearTypeOrderBuilder;
import org.apache.uima.cas.admin.TypeSystemMgr;
import org.apache.uima.cas.impl.CASImpl;
import org.apache.uima.cas.text.AnnotationFS;
import org.apache.uima.resource.ResourceInitializationException;
import org.apache.uima.resource.ResourceSpecifier;
import org.apache.uima.test.junit_extension.FileCompare;
import org.apache.uima.test.junit_extension.JUnitExtension;
import org.apache.uima.util.InvalidXMLException;
import org.apache.uima.util.XMLInputSource;
import org.apache.uima.util.XMLParser;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

public class TypeOrderTest {

  // Index name constants.
  public static final String ANNOT_SET_INDEX = "Annotation Set Index";

  public static final String ANNOT_BAG_INDEX = "Annotation Bag Index";

  public static final String TYPE_ORDER_INDEX = "TypeOrderIndex";

  public static final String TOKEN_TYPE = "Token";

  public static final String TOKEN_TYPE_FEAT = "type";

  public static final String TOKEN_TYPE_FEAT_Q = TOKEN_TYPE + TypeSystem.FEATURE_SEPARATOR
          + TOKEN_TYPE_FEAT;

  public static final String TOKEN_TYPE_TYPE = "TokenType";

  public static final String WORD_TYPE = "Word";

  public static final String SEP_TYPE = "Separator";

  public static final String EOS_TYPE = "EndOfSentence";

  public static final String SENT_TYPE = "Sentence";

  // private CASMgr casMgr;

  private CAS cas;

  private Type annotationType;

  private Type tokenType;

  private Type sentenceType;

  @BeforeEach
  public void setUp() throws Exception {
    // this.casMgr = initCAS();
    File descriptorFile = JUnitExtension
            .getFile("CASTests/desc/typePriorityTestCaseDescriptor.xml");
    assertTrue("Descriptor must exist: " + descriptorFile.getAbsolutePath(),
            descriptorFile.exists());

    try {
      XMLParser parser = UIMAFramework.getXMLParser();
      ResourceSpecifier spec = (ResourceSpecifier) parser.parse(new XMLInputSource(descriptorFile));
      AnalysisEngine ae = UIMAFramework.produceAnalysisEngine(spec);
      cas = ae.newCAS();
      assertTrue(cas != null);
    } catch (IOException e) {
      e.printStackTrace();
      assertTrue(false);
    } catch (InvalidXMLException e) {
      e.printStackTrace();
      assertTrue(false);
    } catch (ResourceInitializationException e) {
      e.printStackTrace();
      assertTrue(false);
    }

    TypeSystem ts = cas.getTypeSystem();
    // assert(wordType != null);
    tokenType = ts.getType(TOKEN_TYPE);
    sentenceType = ts.getType(SENT_TYPE);
    annotationType = ts.getType(CAS.TYPE_NAME_ANNOTATION);
    assertTrue(annotationType != null);
  }

  @AfterEach
  public void tearDown() {
    // this.casMgr = null;
    cas = null;
    tokenType = null;
    sentenceType = null;
    annotationType = null;
  }

  // Initialize the first CAS.
  @Test
  public void testInitCAS() {
    // Create a CASMgr. Ensures existence of AnnotationFS type.
    CASMgr cas1 = CASFactory.createCAS();
    // Create a writable type system.
    TypeSystemMgr tsa = cas1.getTypeSystemMgr();
    // Add new types and features.
    Type topType = tsa.getTopType();
    Type annotType = tsa.getType(CAS.TYPE_NAME_ANNOTATION);
    // assert(annotType != null);
    tsa.addType(SENT_TYPE, annotType);
    tsa.addType(TOKEN_TYPE, annotType);
    Type tokenTypeType = tsa.addType(TOKEN_TYPE_TYPE, topType);
    tsa.addType(WORD_TYPE, tokenTypeType);
    tsa.addType(SEP_TYPE, tokenTypeType);
    tsa.addType(EOS_TYPE, tokenTypeType);
    // Commit the type system.
    ((CASImpl) cas1).commitTypeSystem();
    // Create the Base indexes.
    try {
      cas1.initCASIndexes();
    } catch (CASException e2) {
      e2.printStackTrace();
      assertTrue(false);
    }

    FSIndexRepositoryMgr irm = cas1.getIndexRepositoryMgr();

    // Check that appropriate exception is thrown on unknown types.
    LinearTypeOrderBuilder order = irm.createTypeSortOrder();
    boolean excCaught = false;
    try {
      order.add(new String[] { "foo", "bar" });
      order.getOrder();
    } catch (NullPointerException e) {
      assertTrue(false);
    } catch (CASException e) {
      excCaught = true;
    }
    assertTrue(excCaught);

    // Create an alternative annotation index using a type sort order.
    order = irm.createTypeSortOrder();
    try {
      order.add(new String[] { TOKEN_TYPE, SENT_TYPE, CAS.TYPE_NAME_ANNOTATION });
      order.getOrder();
    } catch (CASException e) {
      assertTrue(false);
    }
  }

  /**
   * Test driver.
   */
  @Test
  public void testMain() throws Exception {

    File refFile = JUnitExtension.getFile("CASTests/CasTypeOrderTestRef.txt");
    assertThat(refFile).isNotNull();
    File outputFile = new File(JUnitExtension.getFile("CASTests"), "CasTypeOderTest_testouput.txt");
    OutputStreamWriter fileWriter = new OutputStreamWriter(new FileOutputStream(outputFile, false),
            UTF_8);

    for (int i = 0; i < 10; i++) {
      cas.getIndexRepository().addFS(cas.createAnnotation(annotationType, i * 2, (i * 2) + 1));
      cas.getIndexRepository().addFS(cas.createAnnotation(sentenceType, i * 2, (i * 2) + 1));
      cas.getIndexRepository().addFS(cas.createAnnotation(tokenType, i * 2, (i * 2) + 1));
      cas.getIndexRepository().addFS(cas.createAnnotation(tokenType, i * 2, (i * 2) + 1));
      cas.getIndexRepository().addFS(cas.createAnnotation(tokenType, i * 2, (i * 2) + 1));
    }
    for (int i = 19; i >= 10; i--) {
      cas.getIndexRepository().addFS(cas.createAnnotation(annotationType, i * 2, (i * 2) + 1));
      cas.getIndexRepository().addFS(cas.createAnnotation(sentenceType, i * 2, (i * 2) + 1));
      cas.getIndexRepository().addFS(cas.createAnnotation(tokenType, i * 2, (i * 2) + 1));
      cas.getIndexRepository().addFS(cas.createAnnotation(tokenType, i * 2, (i * 2) + 1));
      cas.getIndexRepository().addFS(cas.createAnnotation(tokenType, i * 2, (i * 2) + 1));
    }

    FSIterator<FeatureStructure> it = cas.getIndexRepository().getIndex(TYPE_ORDER_INDEX)
            .iterator();

    // it = cas.getAnnotationIndex().iterator();
    AnnotationFS fs;
    for (it.moveToFirst(); it.isValid(); it.moveToNext()) {
      fs = (AnnotationFS) it.get();
      fileWriter.write(fs.getType().getName() + ": " + fs.getBegin() + " - " + fs.getEnd() + "\n");
    }

    fileWriter.close();
    // System.out.println(refFile.getAbsolutePath());
    // System.out.println(outputFile.getAbsolutePath());
    assertThat(FileCompare.compare(refFile, outputFile)).as("Comparing ref "
            + refFile.getAbsolutePath() + " and output " + outputFile.getAbsolutePath()).isTrue();
  }
}
