/*
 * 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.collection.impl.cpm;

import org.apache.uima.UIMAFramework;
import org.apache.uima.collection.CollectionProcessingEngine;
import org.apache.uima.collection.impl.cpm.utils.DescriptorMakeUtil;
import org.apache.uima.collection.impl.cpm.utils.FunctionErrorStore;
import org.apache.uima.collection.impl.cpm.utils.TestStatusCallbackListener;
import org.apache.uima.collection.impl.metadata.cpe.CpeDescriptorFactory;
import org.apache.uima.collection.metadata.CpeDescription;
import org.apache.uima.collection.metadata.CpeIntegratedCasProcessor;
import org.apache.uima.test.junit_extension.JUnitExtension;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Test;

public class CpmStopTest {
  private static final String separator = System.getProperties().getProperty("file.separator");

  @AfterEach
  public void tearDown() throws Exception {
    FunctionErrorStore.resetCount();
  }

  @Test
  public void testCpmStopSingleThread() throws Exception {
    int documentCount = 100000; // hopefully enough that we won't finish before we abort
    int threadCount = 1;

    // setup CPM to process 100 documents
    CollectionProcessingEngine cpe = setupCpm(documentCount, threadCount, false);

    // create and register a status callback listener
    TestStatusCallbackListener listener = new TestStatusCallbackListener();
    cpe.addStatusCallbackListener(listener);

    // run CPM
    cpe.process();

    // sleep a bit
    Thread.sleep(1000);

    // stop CPM
    cpe.stop();

    // wait until CPM has aborted
    while (!listener.isAborted()) {
      Thread.sleep(5);
    }
  }

  @Test
  public void testCpmStopMultipleThreads() throws Exception {
    int documentCount = 100000; // hopefully enough that we won't finish before we abort
    int threadCount = 5;

    // setup CPM to process 100 documents
    CollectionProcessingEngine cpe = setupCpm(documentCount, threadCount, false);

    // create and register a status callback listener
    TestStatusCallbackListener listener = new TestStatusCallbackListener();
    cpe.addStatusCallbackListener(listener);

    // run CPM
    cpe.process();

    // sleep a bit
    Thread.sleep(1000);

    // stop CPM
    cpe.stop();

    // wait until CPM has aborted
    while (!listener.isAborted()) {
      Thread.sleep(5);
    }
  }

  @Test
  public void testCpmStopSlowAnnotator() throws Exception {
    int documentCount = 1000; // hopefully enough that we won't finish before we abort
    int threadCount = 1;

    // setup CPM to process 100 documents
    final CollectionProcessingEngine cpe = setupCpm(documentCount, threadCount, true);

    // register status callback listener
    final TestStatusCallbackListener listener = new TestStatusCallbackListener();
    cpe.addStatusCallbackListener(listener);

    // run CPM
    cpe.process();

    // sleep a bit
    Thread.sleep(1000);

    // stop CPM
    cpe.stop();

    // wait until CPM has aborted
    while (!listener.isAborted()) {
      Thread.sleep(5);
    }
  }

  @Test
  public void testCpmStopImmediate() throws Exception {
    int documentCount = 100000; // hopefully enough that we won't finish before we abort
    int threadCount = 1;

    // setup CPM to process 100 documents
    CollectionProcessingEngine cpe = setupCpm(documentCount, threadCount, false);

    // create and register a status callback listener
    TestStatusCallbackListener listener = new TestStatusCallbackListener();
    cpe.addStatusCallbackListener(listener);

    // run CPM
    cpe.process();

    // stop CPM immediately
    cpe.stop();

    // wait until CPM has aborted
    while (!listener.isAborted()) {
      Thread.sleep(5);
    }
  }

  /**
   * setup the CPM with base functionality.
   * 
   * @param documentCount
   *          how many documents should be processed
   * @param threadCount
   *          how many threads are used by the cpm
   * 
   * @return CollectionProcessingEngine - initialized cpe
   */
  private CollectionProcessingEngine setupCpm(int documentCount, int threadCount,
          boolean useSlowAnnotator) throws Exception {
    CpeDescription cpeDesc = null;
    CollectionProcessingEngine cpe = null;

    String colReaderBase = JUnitExtension
            .getFile("CpmTests" + separator + "ErrorTestCollectionReader.xml").getAbsolutePath();
    String taeBase = JUnitExtension.getFile("CpmTests" + separator + "ErrorTestAnnotator.xml")
            .getAbsolutePath();
    String casConsumerBase = JUnitExtension
            .getFile("CpmTests" + separator + "ErrorTestCasConsumer.xml").getAbsolutePath();

    // created needed descriptors
    String colReaderDesc = DescriptorMakeUtil.makeCollectionReader(colReaderBase, documentCount);
    String taeDesc = DescriptorMakeUtil.makeAnalysisEngine(taeBase);
    String casConsumerDesc = DescriptorMakeUtil.makeCasConsumer(casConsumerBase);

    // create cpm descriptor
    cpeDesc = CpeDescriptorFactory.produceDescriptor();
    cpeDesc.setInputQueueSize(2);
    cpeDesc.setOutputQueueSize(2);
    cpeDesc.setProcessingUnitThreadCount(threadCount);

    // add tae
    CpeIntegratedCasProcessor integratedProcessor = CpeDescriptorFactory
            .produceCasProcessor("ErrorTestAnnotator");
    integratedProcessor.setDescriptor(taeDesc);
    cpeDesc.addCasProcessor(integratedProcessor);

    // add slow annotator if requested
    if (useSlowAnnotator) {
      CpeIntegratedCasProcessor slowProcessor = CpeDescriptorFactory
              .produceCasProcessor("SlowAnnotator");
      slowProcessor.setDescriptor(JUnitExtension
              .getFile("CpmTests" + separator + "SlowAnnotator.xml").getAbsolutePath());
      cpeDesc.addCasProcessor(slowProcessor);
    }

    // add casConsumer
    CpeIntegratedCasProcessor casConsumer = CpeDescriptorFactory
            .produceCasProcessor("ErrorTest CasConsumer");
    casConsumer.setDescriptor(casConsumerDesc);
    cpeDesc.addCasProcessor(casConsumer);

    // add collectionReader
    cpeDesc.addCollectionReader(colReaderDesc);

    // produce cpe
    cpe = UIMAFramework.produceCollectionProcessingEngine(cpeDesc, null, null);

    return cpe;
  }
}
