/*
 * 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.druid.indexing.common;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.Function;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Maps;
import com.google.common.collect.Multimap;
import com.google.common.collect.Multimaps;
import com.google.inject.Provider;
import org.apache.commons.io.FileUtils;
import org.apache.druid.client.cache.Cache;
import org.apache.druid.client.cache.CacheConfig;
import org.apache.druid.client.cache.CachePopulatorStats;
import org.apache.druid.client.coordinator.CoordinatorClient;
import org.apache.druid.client.indexing.IndexingServiceClient;
import org.apache.druid.discovery.DataNodeService;
import org.apache.druid.discovery.DruidNodeAnnouncer;
import org.apache.druid.discovery.LookupNodeService;
import org.apache.druid.indexing.common.actions.SegmentInsertAction;
import org.apache.druid.indexing.common.actions.TaskActionClient;
import org.apache.druid.indexing.common.config.TaskConfig;
import org.apache.druid.indexing.common.task.IndexTaskClientFactory;
import org.apache.druid.indexing.common.task.batch.parallel.ParallelIndexSupervisorTaskClient;
import org.apache.druid.indexing.common.task.batch.parallel.ShuffleClient;
import org.apache.druid.indexing.worker.shuffle.IntermediaryDataManager;
import org.apache.druid.java.util.emitter.service.ServiceEmitter;
import org.apache.druid.java.util.metrics.Monitor;
import org.apache.druid.java.util.metrics.MonitorScheduler;
import org.apache.druid.query.QueryProcessingPool;
import org.apache.druid.query.QueryRunnerFactoryConglomerate;
import org.apache.druid.segment.IndexIO;
import org.apache.druid.segment.IndexMergerV9;
import org.apache.druid.segment.handoff.SegmentHandoffNotifierFactory;
import org.apache.druid.segment.incremental.RowIngestionMetersFactory;
import org.apache.druid.segment.join.JoinableFactory;
import org.apache.druid.segment.loading.DataSegmentArchiver;
import org.apache.druid.segment.loading.DataSegmentKiller;
import org.apache.druid.segment.loading.DataSegmentMover;
import org.apache.druid.segment.loading.DataSegmentPusher;
import org.apache.druid.segment.loading.SegmentCacheManager;
import org.apache.druid.segment.loading.SegmentLoadingException;
import org.apache.druid.segment.realtime.appenderator.AppenderatorsManager;
import org.apache.druid.segment.realtime.firehose.ChatHandlerProvider;
import org.apache.druid.server.DruidNode;
import org.apache.druid.server.coordination.DataSegmentAnnouncer;
import org.apache.druid.server.coordination.DataSegmentServerAnnouncer;
import org.apache.druid.server.security.AuthorizerMapper;
import org.apache.druid.timeline.DataSegment;
import org.joda.time.Interval;

import javax.annotation.Nullable;
import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.List;
import java.util.Map;

/**
 * Stuff that may be needed by a Task in order to conduct its business.
 */
public class TaskToolbox
{
  private final TaskConfig config;
  private final DruidNode taskExecutorNode;
  private final TaskActionClient taskActionClient;
  private final ServiceEmitter emitter;
  private final DataSegmentPusher segmentPusher;
  private final DataSegmentKiller dataSegmentKiller;
  private final DataSegmentArchiver dataSegmentArchiver;
  private final DataSegmentMover dataSegmentMover;
  private final DataSegmentAnnouncer segmentAnnouncer;
  private final DataSegmentServerAnnouncer serverAnnouncer;
  private final SegmentHandoffNotifierFactory handoffNotifierFactory;
  /**
   * Using Provider, not {@link QueryRunnerFactoryConglomerate} directly, to not require {@link
   * org.apache.druid.indexing.overlord.TaskRunner} implementations that create TaskToolboxes to inject query stuff eagerly,
   * because it may be unavailable, e. g. for batch tasks running in Spark or Hadoop.
   */
  private final Provider<QueryRunnerFactoryConglomerate> queryRunnerFactoryConglomerateProvider;
  @Nullable
  private final Provider<MonitorScheduler> monitorSchedulerProvider;
  private final QueryProcessingPool queryProcessingPool;
  private final JoinableFactory joinableFactory;
  private final SegmentCacheManager segmentCacheManager;
  private final ObjectMapper jsonMapper;
  private final File taskWorkDir;
  private final IndexIO indexIO;
  private final Cache cache;
  private final CacheConfig cacheConfig;
  private final CachePopulatorStats cachePopulatorStats;
  private final IndexMergerV9 indexMergerV9;
  private final TaskReportFileWriter taskReportFileWriter;

  private final DruidNodeAnnouncer druidNodeAnnouncer;
  private final DruidNode druidNode;
  private final LookupNodeService lookupNodeService;
  private final DataNodeService dataNodeService;

  private final AuthorizerMapper authorizerMapper;
  private final ChatHandlerProvider chatHandlerProvider;
  private final RowIngestionMetersFactory rowIngestionMetersFactory;
  private final AppenderatorsManager appenderatorsManager;
  private final IndexingServiceClient indexingServiceClient;
  private final CoordinatorClient coordinatorClient;

  // Used by only native parallel tasks
  private final IntermediaryDataManager intermediaryDataManager;
  private final IndexTaskClientFactory<ParallelIndexSupervisorTaskClient> supervisorTaskClientFactory;
  private final ShuffleClient shuffleClient;

  public TaskToolbox(
      TaskConfig config,
      DruidNode taskExecutorNode,
      TaskActionClient taskActionClient,
      ServiceEmitter emitter,
      DataSegmentPusher segmentPusher,
      DataSegmentKiller dataSegmentKiller,
      DataSegmentMover dataSegmentMover,
      DataSegmentArchiver dataSegmentArchiver,
      DataSegmentAnnouncer segmentAnnouncer,
      DataSegmentServerAnnouncer serverAnnouncer,
      SegmentHandoffNotifierFactory handoffNotifierFactory,
      Provider<QueryRunnerFactoryConglomerate> queryRunnerFactoryConglomerateProvider,
      QueryProcessingPool queryProcessingPool,
      JoinableFactory joinableFactory,
      @Nullable Provider<MonitorScheduler> monitorSchedulerProvider,
      SegmentCacheManager segmentCacheManager,
      ObjectMapper jsonMapper,
      File taskWorkDir,
      IndexIO indexIO,
      Cache cache,
      CacheConfig cacheConfig,
      CachePopulatorStats cachePopulatorStats,
      IndexMergerV9 indexMergerV9,
      DruidNodeAnnouncer druidNodeAnnouncer,
      DruidNode druidNode,
      LookupNodeService lookupNodeService,
      DataNodeService dataNodeService,
      TaskReportFileWriter taskReportFileWriter,
      IntermediaryDataManager intermediaryDataManager,
      AuthorizerMapper authorizerMapper,
      ChatHandlerProvider chatHandlerProvider,
      RowIngestionMetersFactory rowIngestionMetersFactory,
      AppenderatorsManager appenderatorsManager,
      IndexingServiceClient indexingServiceClient,
      CoordinatorClient coordinatorClient,
      IndexTaskClientFactory<ParallelIndexSupervisorTaskClient> supervisorTaskClientFactory,
      ShuffleClient shuffleClient
  )
  {
    this.config = config;
    this.taskExecutorNode = taskExecutorNode;
    this.taskActionClient = taskActionClient;
    this.emitter = emitter;
    this.segmentPusher = segmentPusher;
    this.dataSegmentKiller = dataSegmentKiller;
    this.dataSegmentMover = dataSegmentMover;
    this.dataSegmentArchiver = dataSegmentArchiver;
    this.segmentAnnouncer = segmentAnnouncer;
    this.serverAnnouncer = serverAnnouncer;
    this.handoffNotifierFactory = handoffNotifierFactory;
    this.queryRunnerFactoryConglomerateProvider = queryRunnerFactoryConglomerateProvider;
    this.queryProcessingPool = queryProcessingPool;
    this.joinableFactory = joinableFactory;
    this.monitorSchedulerProvider = monitorSchedulerProvider;
    this.segmentCacheManager = segmentCacheManager;
    this.jsonMapper = jsonMapper;
    this.taskWorkDir = taskWorkDir;
    this.indexIO = Preconditions.checkNotNull(indexIO, "Null IndexIO");
    this.cache = cache;
    this.cacheConfig = cacheConfig;
    this.cachePopulatorStats = cachePopulatorStats;
    this.indexMergerV9 = Preconditions.checkNotNull(indexMergerV9, "Null IndexMergerV9");
    this.druidNodeAnnouncer = druidNodeAnnouncer;
    this.druidNode = druidNode;
    this.lookupNodeService = lookupNodeService;
    this.dataNodeService = dataNodeService;
    this.taskReportFileWriter = taskReportFileWriter;
    this.taskReportFileWriter.setObjectMapper(this.jsonMapper);
    this.intermediaryDataManager = intermediaryDataManager;
    this.authorizerMapper = authorizerMapper;
    this.chatHandlerProvider = chatHandlerProvider;
    this.rowIngestionMetersFactory = rowIngestionMetersFactory;
    this.appenderatorsManager = appenderatorsManager;
    this.indexingServiceClient = indexingServiceClient;
    this.coordinatorClient = coordinatorClient;
    this.supervisorTaskClientFactory = supervisorTaskClientFactory;
    this.shuffleClient = shuffleClient;
  }

  public TaskConfig getConfig()
  {
    return config;
  }

  public DruidNode getTaskExecutorNode()
  {
    return taskExecutorNode;
  }

  public TaskActionClient getTaskActionClient()
  {
    return taskActionClient;
  }

  public ServiceEmitter getEmitter()
  {
    return emitter;
  }

  public DataSegmentPusher getSegmentPusher()
  {
    return segmentPusher;
  }

  public DataSegmentKiller getDataSegmentKiller()
  {
    return dataSegmentKiller;
  }

  public DataSegmentMover getDataSegmentMover()
  {
    return dataSegmentMover;
  }

  public DataSegmentArchiver getDataSegmentArchiver()
  {
    return dataSegmentArchiver;
  }

  public DataSegmentAnnouncer getSegmentAnnouncer()
  {
    return segmentAnnouncer;
  }

  public DataSegmentServerAnnouncer getDataSegmentServerAnnouncer()
  {
    return serverAnnouncer;
  }

  public SegmentHandoffNotifierFactory getSegmentHandoffNotifierFactory()
  {
    return handoffNotifierFactory;
  }

  public QueryRunnerFactoryConglomerate getQueryRunnerFactoryConglomerate()
  {
    return queryRunnerFactoryConglomerateProvider.get();
  }

  public QueryProcessingPool getQueryProcessingPool()
  {
    return queryProcessingPool;
  }

  public JoinableFactory getJoinableFactory()
  {
    return joinableFactory;
  }

  @Nullable
  public MonitorScheduler getMonitorScheduler()
  {
    return monitorSchedulerProvider == null ? null : monitorSchedulerProvider.get();
  }

  /**
   * Adds a monitor to the monitorScheduler if it is configured
   * @param monitor
   */
  public void addMonitor(Monitor monitor)
  {
    MonitorScheduler scheduler = getMonitorScheduler();
    if (scheduler != null) {
      scheduler.addMonitor(monitor);
    }
  }

  /**
   * Adds a monitor to the monitorScheduler if it is configured
   * @param monitor
   */
  public void removeMonitor(Monitor monitor)
  {
    MonitorScheduler scheduler = getMonitorScheduler();
    if (scheduler != null) {
      scheduler.removeMonitor(monitor);
    }
  }

  public ObjectMapper getJsonMapper()
  {
    return jsonMapper;
  }

  public Map<DataSegment, File> fetchSegments(List<DataSegment> segments)
      throws SegmentLoadingException
  {
    Map<DataSegment, File> retVal = Maps.newLinkedHashMap();
    for (DataSegment segment : segments) {
      retVal.put(segment, segmentCacheManager.getSegmentFiles(segment));
    }

    return retVal;
  }

  public void publishSegments(Iterable<DataSegment> segments) throws IOException
  {
    // Request segment pushes for each set
    final Multimap<Interval, DataSegment> segmentMultimap = Multimaps.index(
        segments,
        new Function<DataSegment, Interval>()
        {
          @Override
          public Interval apply(DataSegment segment)
          {
            return segment.getInterval();
          }
        }
    );
    for (final Collection<DataSegment> segmentCollection : segmentMultimap.asMap().values()) {
      getTaskActionClient().submit(new SegmentInsertAction(ImmutableSet.copyOf(segmentCollection)));
    }
  }

  public IndexIO getIndexIO()
  {
    return indexIO;
  }

  public Cache getCache()
  {
    return cache;
  }

  public CacheConfig getCacheConfig()
  {
    return cacheConfig;
  }

  public CachePopulatorStats getCachePopulatorStats()
  {
    return cachePopulatorStats;
  }

  public IndexMergerV9 getIndexMergerV9()
  {
    return indexMergerV9;
  }

  public File getIndexingTmpDir()
  {
    final File tmpDir = new File(taskWorkDir, "indexing-tmp");
    try {
      FileUtils.forceMkdir(tmpDir);
    }
    catch (IOException e) {
      throw new RuntimeException(e);
    }
    return tmpDir;
  }

  public File getMergeDir()
  {
    return new File(taskWorkDir, "merge");
  }

  public File getPersistDir()
  {
    return new File(taskWorkDir, "persist");
  }

  public DruidNodeAnnouncer getDruidNodeAnnouncer()
  {
    return druidNodeAnnouncer;
  }

  public LookupNodeService getLookupNodeService()
  {
    return lookupNodeService;
  }

  public DataNodeService getDataNodeService()
  {
    return dataNodeService;
  }

  public DruidNode getDruidNode()
  {
    return druidNode;
  }

  public TaskReportFileWriter getTaskReportFileWriter()
  {
    return taskReportFileWriter;
  }

  public IntermediaryDataManager getIntermediaryDataManager()
  {
    return intermediaryDataManager;
  }

  public AuthorizerMapper getAuthorizerMapper()
  {
    return authorizerMapper;
  }

  public ChatHandlerProvider getChatHandlerProvider()
  {
    return chatHandlerProvider;
  }

  public RowIngestionMetersFactory getRowIngestionMetersFactory()
  {
    return rowIngestionMetersFactory;
  }

  public AppenderatorsManager getAppenderatorsManager()
  {
    return appenderatorsManager;
  }

  public IndexingServiceClient getIndexingServiceClient()
  {
    return indexingServiceClient;
  }

  public CoordinatorClient getCoordinatorClient()
  {
    return coordinatorClient;
  }

  public IndexTaskClientFactory<ParallelIndexSupervisorTaskClient> getSupervisorTaskClientFactory()
  {
    return supervisorTaskClientFactory;
  }

  public ShuffleClient getShuffleClient()
  {
    return shuffleClient;
  }
}