/**
 * 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 com.alibaba.jstorm.blobstore;

import backtype.storm.Config;
import backtype.storm.LocalUtils;
import backtype.storm.nimbus.NimbusInfo;
import backtype.storm.utils.Utils;
import com.alibaba.jstorm.zk.Factory;
import org.apache.commons.io.FileUtils;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.retry.ExponentialBackoffRetry;
import org.apache.zookeeper.server.NIOServerCnxnFactory;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.util.*;

import static org.junit.Assert.assertTrue;

/**
 *  Unit tests for most of the testable utility methods
 *  and BlobSynchronizer class methods
 */
public class BlobSynchronizerTest {
  private URI base;
  private File baseFile;
  private static Map conf = new HashMap();
  private NIOServerCnxnFactory factory;

  @Before
  public void init() throws Exception {
    initializeConfigs();
    baseFile = new File("target/blob-store-test-"+ UUID.randomUUID());
    base = baseFile.toURI();
  }

  @After
  public void cleanUp() throws IOException {
    FileUtils.deleteDirectory(baseFile);
    if (factory != null) {
      factory.shutdown();
    }
  }

  // Method which initializes nimbus admin
  public static void initializeConfigs() {
    conf.put(Config.NIMBUS_ADMINS,"admin");
    conf.put(Config.NIMBUS_SUPERVISOR_USERS,"supervisor");
  }

  private LocalFsBlobStore initLocalFs() {
    LocalFsBlobStore store = new LocalFsBlobStore();
    Map conf = Utils.readStormConfig();
    conf.put(Config.STORM_LOCAL_DIR, baseFile.getAbsolutePath());
    conf.put(Config.STORM_PRINCIPAL_TO_LOCAL_PLUGIN,"org.apache.storm.security.auth.DefaultPrincipalToLocal");
    this.conf = conf;
    store.prepare(conf, null, null);
    return store;
  }

  @Test
  public void testBlobSynchronizerForKeysToDownload() {
    BlobStore store = initLocalFs();
    BlobSynchronizer sync = new BlobSynchronizer(store, conf);
    // test for keylist to download
    Set<String> zkSet = new HashSet<String>();
    zkSet.add("key1");
    Set<String> blobStoreSet = new HashSet<String>();
    blobStoreSet.add("key1");
    Set<String> resultSet = sync.getKeySetToDownload(blobStoreSet, zkSet);
    assertTrue("Not Empty", resultSet.isEmpty());
    zkSet.add("key1");
    blobStoreSet.add("key2");
    resultSet =  sync.getKeySetToDownload(blobStoreSet, zkSet);
    assertTrue("Not Empty", resultSet.isEmpty());
    blobStoreSet.remove("key1");
    blobStoreSet.remove("key2");
    zkSet.add("key1");
    resultSet =  sync.getKeySetToDownload(blobStoreSet, zkSet);
    assertTrue("Unexpected keys to download", (resultSet.size() == 1) && (resultSet.contains("key1")));
  }

  @Test
  public void testGetLatestSequenceNumber() throws Exception {
    List<String> stateInfoList = new ArrayList<String>();
    stateInfoList.add("nimbus1:8000-2");
    stateInfoList.add("nimbus-1:8000-4");
    assertTrue("Failed to get the latest version", BlobStoreUtils.getLatestSequenceNumber(stateInfoList)==4);
  }



  @Test
  public void testNormalizeVersionInfo () throws Exception {
    BlobKeySequenceInfo info1 = BlobStoreUtils.normalizeNimbusHostPortSequenceNumberInfo("nimbus1:7800-1");
    assertTrue(info1.getNimbusHostPort().equals("nimbus1:7800"));
    assertTrue(info1.getSequenceNumber().equals("1"));
    BlobKeySequenceInfo info2 = BlobStoreUtils.normalizeNimbusHostPortSequenceNumberInfo("nimbus-1:7800-1");
    assertTrue(info2.getNimbusHostPort().equals("nimbus-1:7800"));
    assertTrue(info2.getSequenceNumber().equals("1"));
  }
}