/*
 * 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 java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Collections;
import java.util.Set;

import org.apache.logging.log4j.Logger;

import org.apache.geode.cache.CacheException;
import org.apache.geode.distributed.internal.DM;
import org.apache.geode.distributed.internal.DistributionManager;
import org.apache.geode.distributed.internal.DistributionStats;
import org.apache.geode.distributed.internal.ReplyMessage;
import org.apache.geode.distributed.internal.ReplyProcessor21;
import org.apache.geode.distributed.internal.ReplySender;
import org.apache.geode.distributed.internal.membership.InternalDistributedMember;
import org.apache.geode.internal.Assert;
import org.apache.geode.internal.i18n.LocalizedStrings;
import org.apache.geode.internal.logging.LogService;
import org.apache.geode.internal.logging.log4j.LogMarker;

/**
 * This message is used be a replicate region to perform region-level ops like clear() and
 * invalidateRegion(). It is used when the target region has concurrency control enabled so that
 * region-version-vectors must be used to execute these operations.
 * 
 * @since GemFire 7.0
 */
public final class RemoteRegionOperation extends RemoteOperationMessageWithDirectReply {
  private static final Logger logger = LogService.getLogger();

  private enum Operation {
    CLEAR,
    // INVALIDATE
  }

  transient private DistributedRegion region;
  private Operation op;

  public RemoteRegionOperation() {}

  public static RemoteRegionOperation clear(InternalDistributedMember recipient,
      DistributedRegion region) {
    return new RemoteRegionOperation(recipient, region, Operation.CLEAR);
  }

  // public static RemoteRegionOperation invalidate(InternalDistributedMember recipient,
  // DistributedRegion region) {
  // return new RemoteRegionOperation(recipient, region, Operation.INVALIDATE);
  // }

  private RemoteRegionOperation(InternalDistributedMember recipient, DistributedRegion region,
      Operation op) {
    super(recipient, region.getFullPath(),
        new RemoteOperationResponse(region.getSystem(), Collections.singleton(recipient)));
    this.op = op;
    this.region = region;
  }

  /**
   */
  public void distribute() throws RemoteOperationException {
    RemoteOperationResponse p = (RemoteOperationResponse) this.processor;

    Set failures = region.getDistributionManager().putOutgoing(this);
    if (failures != null && failures.size() > 0) {
      throw new RemoteOperationException(LocalizedStrings.FAILED_SENDING_0.toLocalizedString(this));
    }

    p.waitForCacheException();
  }

  @Override
  protected boolean operateOnRegion(DistributionManager dm, LocalRegion r, long startTime)
      throws CacheException, RemoteOperationException {
    if (logger.isTraceEnabled(LogMarker.DM)) {
      logger.trace(LogMarker.DM, "DistributedRemoteRegionOperation operateOnRegion: {}",
          r.getFullPath());
    }


    if (!(r instanceof PartitionedRegion)) {
      r.waitOnInitialization(); // bug #43371 - accessing a region before it's initialized
    }

    if (op.equals(Operation.CLEAR)) {
      r.clear();
      // } else {
      // r.invalidateRegion();
    }

    // r.getPrStats().endPartitionMessagesProcessing(startTime);
    RemoteRegionOperationReplyMessage.send(getSender(), getProcessorId(), getReplySender(dm));

    // Unless there was an exception thrown, this message handles sending the
    // response
    return false;
  }

  @Override
  protected void appendFields(StringBuffer buff) {
    super.appendFields(buff);
    buff.append("; operation=").append(this.op);
  }

  public int getDSFID() {
    return R_REGION_OP;
  }

  @Override
  public void fromData(DataInput in) throws IOException, ClassNotFoundException {
    super.fromData(in);
    this.op = Operation.values()[in.readByte()];
  }

  @Override
  public void toData(DataOutput out) throws IOException {
    super.toData(out);
    out.writeByte(this.op.ordinal());
  }

  public static final class RemoteRegionOperationReplyMessage extends ReplyMessage {

    /**
     * Empty constructor to conform to DataSerializable interface
     */
    public RemoteRegionOperationReplyMessage() {}

    private RemoteRegionOperationReplyMessage(int processorId) {
      this.processorId = processorId;
    }

    /** Send an ack */
    public static void send(InternalDistributedMember recipient, int processorId,
        ReplySender replySender) {
      Assert.assertTrue(recipient != null, "RemoteRegionOperationReplyMessage NULL reply message");
      RemoteRegionOperationReplyMessage m = new RemoteRegionOperationReplyMessage(processorId);
      m.setRecipient(recipient);
      replySender.putOutgoing(m);
    }

    /**
     * Processes this message. This method is invoked by the receiver of the message.
     * 
     * @param dm the distribution manager that is processing the message.
     */
    @Override
    public void process(final DM dm, ReplyProcessor21 processor) {
      final long startTime = getTimestamp();

      if (processor == null) {
        if (logger.isTraceEnabled(LogMarker.DM)) {
          logger.trace(LogMarker.DM, "RemoteRegionOperationReplyMessage processor not found");
        }
        return;
      }
      processor.process(this);

      dm.getStats().incReplyMessageTime(DistributionStats.getStatTime() - startTime);
    }

    @Override
    public int getDSFID() {
      return R_REGION_OP_REPLY;
    }

    @Override
    public void fromData(DataInput in) throws IOException, ClassNotFoundException {
      super.fromData(in);
    }

    @Override
    public void toData(DataOutput out) throws IOException {
      super.toData(out);
    }

    @Override
    public String toString() {
      StringBuffer sb = new StringBuffer();
      sb.append("RemoteRegionOperationReplyMessage ").append("processorid=")
          .append(this.processorId).append(" reply to sender ").append(this.getSender());
      return sb.toString();
    }

  }


}