/*
 * 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.internal.cache;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import java.io.File;
import java.util.Collections;

import org.jmock.Expectations;
import org.jmock.Mockery;
import org.jmock.lib.concurrent.Synchroniser;
import org.jmock.lib.legacy.ClassImposteriser;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;

import org.apache.geode.StatisticsFactory;
import org.apache.geode.internal.cache.persistence.DiskRegionView;

public class DiskInitFileJUnitTest {

  private File testDirectory;
  private Mockery context = new Mockery() {
    {
      setImposteriser(ClassImposteriser.INSTANCE);
      setThreadingPolicy(new Synchroniser());
    }
  };

  @Rule
  public TemporaryFolder temporaryFolder = new TemporaryFolder();

  @Before
  public void setUp() throws Exception {
    testDirectory = temporaryFolder.newFolder("_" + getClass().getSimpleName());
  }

  /**
   * Test the behavior of canonical ids in the init file.
   */
  @Test
  public void testCanonicalIds() {
    // create a mock statistics factory for creating directory holders
    final StatisticsFactory sf = context.mock(StatisticsFactory.class);
    context.checking(new Expectations() {
      {
        ignoring(sf);
      }
    });

    // Create a mock disk store impl. All we need to do is return
    // this init file directory.
    final DiskStoreImpl parent = context.mock(DiskStoreImpl.class);
    context.checking(new Expectations() {
      {
        allowing(parent).getInfoFileDir();
        will(returnValue(new DirectoryHolder(sf, testDirectory, 0, 0)));
        ignoring(parent);
      }
    });

    // Create an init file and add some canonical ids
    DiskInitFile dif = new DiskInitFile("testFile", parent, false, Collections.<File>emptySet());
    assertEquals(null, dif.getCanonicalObject(5));
    assertNull(dif.getCanonicalObject(0));
    int id1 = dif.getOrCreateCanonicalId("object1");
    int id2 = dif.getOrCreateCanonicalId("object2");

    assertEquals("object1", dif.getCanonicalObject(id1));
    assertEquals("object2", dif.getCanonicalObject(id2));
    assertEquals(id2, dif.getOrCreateCanonicalId("object2"));


    // Add a mock region to the init file so it doesn't
    // delete the file when the init file is closed
    final DiskRegionView drv = context.mock(DiskRegionView.class);
    context.checking(new Expectations() {
      {
        ignoring(drv);
      }
    });
    dif.createRegion(drv);

    // close the init file
    dif.close();

    // recover the init file from disk
    dif = new DiskInitFile("testFile", parent, true, Collections.<File>emptySet());

    // make sure we can recover the ids from disk
    assertEquals("object1", dif.getCanonicalObject(id1));
    assertEquals("object2", dif.getCanonicalObject(id2));
    assertEquals(id2, dif.getOrCreateCanonicalId("object2"));

    // Make sure we can add new ids
    int id3 = dif.getOrCreateCanonicalId("object3");
    assertTrue(id3 > id2);
    assertEquals("object1", dif.getCanonicalObject(id1));
    assertEquals("object2", dif.getCanonicalObject(id2));
    assertEquals("object3", dif.getCanonicalObject(id3));

    dif.close();
  }

  @Test
  public void testKrfIds() {
    // create a mock statistics factory for creating directory holders
    final StatisticsFactory sf = context.mock(StatisticsFactory.class);
    context.checking(new Expectations() {
      {
        ignoring(sf);
      }
    });
    // Add a mock region to the init file so it doesn't
    // delete the file when the init file is closed
    final DiskRegionView drv = context.mock(DiskRegionView.class);
    context.checking(new Expectations() {
      {
        ignoring(drv);
      }
    });
    // Create a mock disk store impl. All we need to do is return
    // this init file directory.
    final DiskStoreImpl parent = context.mock(DiskStoreImpl.class);
    context.checking(new Expectations() {
      {
        allowing(parent).getInfoFileDir();
        will(returnValue(new DirectoryHolder(sf, testDirectory, 0, 0)));
        ignoring(parent);
      }
    });

    DiskInitFile dif = new DiskInitFile("testKrfIds", parent, false, Collections.<File>emptySet());
    assertEquals(false, dif.hasKrf(1));
    dif.cmnKrfCreate(1);
    assertEquals(true, dif.hasKrf(1));
    assertEquals(false, dif.hasKrf(2));
    dif.cmnKrfCreate(2);
    assertEquals(true, dif.hasKrf(2));
    dif.createRegion(drv);
    dif.forceCompaction();
    dif.close();

    dif = new DiskInitFile("testKrfIds", parent, true, Collections.<File>emptySet());
    assertEquals(true, dif.hasKrf(1));
    assertEquals(true, dif.hasKrf(2));
    dif.cmnCrfDelete(1);
    assertEquals(false, dif.hasKrf(1));
    assertEquals(true, dif.hasKrf(2));
    dif.cmnCrfDelete(2);
    assertEquals(false, dif.hasKrf(2));
    dif.createRegion(drv);
    dif.forceCompaction();
    dif.close();

    dif = new DiskInitFile("testKrfIds", parent, true, Collections.<File>emptySet());
    assertEquals(false, dif.hasKrf(1));
    assertEquals(false, dif.hasKrf(2));
    dif.destroy();
  }

}
