/*
 * 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.geode.cache.query.dunit;

import static org.apache.geode.cache.Region.SEPARATOR;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;

import java.util.Properties;

import org.junit.Test;
import org.junit.experimental.categories.Category;

import org.apache.geode.cache.CacheException;
import org.apache.geode.cache.Region;
import org.apache.geode.cache.query.QueryTestUtils;
import org.apache.geode.cache.query.data.Portfolio;
import org.apache.geode.cache.query.internal.index.IndexManager;
import org.apache.geode.cache.query.internal.index.IndexManager.TestHook;
import org.apache.geode.cache30.CacheSerializableRunnable;
import org.apache.geode.test.dunit.Assert;
import org.apache.geode.test.dunit.AsyncInvocation;
import org.apache.geode.test.dunit.DistributedTestUtils;
import org.apache.geode.test.dunit.Host;
import org.apache.geode.test.dunit.Invoke;
import org.apache.geode.test.dunit.SerializableRunnable;
import org.apache.geode.test.dunit.VM;
import org.apache.geode.test.dunit.Wait;
import org.apache.geode.test.dunit.internal.JUnit4DistributedTestCase;
import org.apache.geode.test.junit.categories.OQLIndexTest;

@Category({OQLIndexTest.class})
public class CompactRangeIndexDUnitTest extends JUnit4DistributedTestCase {

  QueryTestUtils utils;
  VM vm0;

  @Override
  public final void postSetUp() throws Exception {
    getSystem();
    Invoke.invokeInEveryVM(new SerializableRunnable("getSystem") {
      @Override
      public void run() {
        getSystem();
      }
    });
    Host host = Host.getHost(0);
    vm0 = host.getVM(0);
    utils = new QueryTestUtils();
    utils.initializeQueryMap();
    utils.createServer(vm0,
        DistributedTestUtils.getAllDistributedSystemProperties(new Properties()));
    utils.createReplicateRegion("exampleRegion", vm0);
    utils.createIndex(vm0, "type", "\"type\"", SEPARATOR + "exampleRegion");
  }

  /*
   * Tests that the message component of the exception is not null
   */
  @Test
  public void testIndexInvalidDueToExpressionOnPartitionedRegion() throws Exception {
    Host host = Host.getHost(0);
    utils.createPartitionRegion("examplePartitionedRegion", Portfolio.class, vm0);

    vm0.invoke(new CacheSerializableRunnable("Putting values") {
      @Override
      public void run2() {
        putPortfolios("examplePartitionedRegion", 100);
      }
    });
    try {
      utils.createIndex(vm0, "partitionedIndex", "\"albs\"",
          SEPARATOR + "examplePartitionedRegion");
    } catch (Exception e) {
      // expected
      assertTrue(e.getCause().toString().contains("albs"));
    }
  }


  @Test
  public void testCompactRangeIndexForIndexElemArray() throws Exception {
    doPut(200);// around 66 entries for a key in the index (< 100 so does not create a
               // ConcurrentHashSet)
    doQuery();
    doUpdate(10);
    doQuery();
    doDestroy(200);
    doQuery();
    Thread.sleep(5000);
  }

  @Test
  public void testCompactRangeIndexForConcurrentHashSet() throws Exception {
    doPut(333); // 111 entries for a key in the index (> 100 so creates a ConcurrentHashSet)
    doQuery();
    doUpdate(10);
    doQuery();
    doDestroy(200);
    doQuery();
  }

  @Test
  public void testNoSuchElemException() throws Exception {
    setHook();
    doPutSync(300);
    doDestroy(298);
    doQuery();
  }

  public void doPut(final int entries) {
    vm0.invokeAsync(new CacheSerializableRunnable("Putting values") {
      @Override
      public void run2() {
        putPortfolios("exampleRegion", entries);
      }
    });
  }

  public void doPutSync(final int entries) {
    vm0.invoke(new CacheSerializableRunnable("Putting values") {
      @Override
      public void run2() {
        putPortfolios("exampleRegion", entries);
      }
    });
  }

  public void doUpdate(final int entries) {
    vm0.invokeAsync(new CacheSerializableRunnable("Updating values") {
      @Override
      public void run2() {
        putOffsetPortfolios("exampleRegion", entries);
      }
    });
  }

  public void doQuery() throws InterruptedException {
    final String[] qarr = {"1", "519", "181"};
    AsyncInvocation<Void> as0 = vm0.invokeAsync(new CacheSerializableRunnable("Executing query") {
      @Override
      public void run2() throws CacheException {
        for (int i = 0; i < 50; i++) {
          try {
            utils.executeQueries(qarr);
          } catch (Exception e) {
            throw new CacheException(e) {};
          }
        }
      }
    });
    as0.join();
    if (as0.exceptionOccurred()) {
      Assert.fail("Query execution failed.", as0.getException());
    }

  }

  public void doDestroy(final int entries) throws Exception {
    vm0.invokeAsync(new CacheSerializableRunnable("Destroying values") {
      @Override
      public void run2() {
        try {
          Thread.sleep(500);
          // destroy entries
          Region region = utils.getRegion("exampleRegion");
          for (int i = 1; i <= entries; i++) {
            try {
              region.destroy("KEY-" + i);
            } catch (Exception e) {
              throw new Exception(e);
            }
          }
        } catch (Exception e) {
          fail("Destroy failed.");
        }
      }
    });

  }

  @Override
  public final void preTearDown() throws Exception {
    Thread.sleep(5000);
    removeHook();
    utils.closeServer(vm0);
  }

  public void setHook() {
    vm0.invoke(new CacheSerializableRunnable("Setting hook") {
      @Override
      public void run2() {
        IndexManager.testHook = new CompactRangeIndexTestHook();
      }
    });
  }

  public void removeHook() {
    vm0.invoke(new CacheSerializableRunnable("Removing hook") {
      @Override
      public void run2() {
        IndexManager.testHook = null;
      }
    });
  }

  private void putPortfolios(String regionName, int size) {
    Region region = utils.getRegion(regionName);
    for (int i = 1; i <= size; i++) {
      region.put("KEY-" + i, new Portfolio(i));
    }
  }

  private void putOffsetPortfolios(String regionName, int size) {
    Region region = utils.getRegion(regionName);
    for (int i = 1; i <= size; i++) {
      region.put("KEY-" + i, new Portfolio(i + 1));
    }
  }


  private static class CompactRangeIndexTestHook implements TestHook {
    @Override
    public void hook(int spot) throws RuntimeException {
      if (spot == 11) {
        Wait.pause(10);
      }
    }
  }

}
