/*
 * 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.management.internal.cli.commands;

import java.util.Set;

import javax.management.ObjectName;

import org.springframework.shell.standard.ShellMethod;
import org.springframework.shell.standard.ShellOption;

import org.apache.geode.cache.Cache;
import org.apache.geode.distributed.DistributedMember;
import org.apache.geode.management.GatewaySenderMXBean;
import org.apache.geode.management.cli.CliMetaData;
import org.apache.geode.management.cli.GfshCommand;
import org.apache.geode.management.internal.SystemManagementService;
import org.apache.geode.management.internal.cli.result.model.ResultModel;
import org.apache.geode.management.internal.cli.result.model.TabularResultModel;
import org.apache.geode.management.internal.i18n.CliStrings;
import org.apache.geode.management.internal.security.ResourceOperation;
import org.apache.geode.security.ResourcePermission;

public class LoadBalanceGatewaySenderCommand extends GfshCommand {

  @ShellMethod(value = CliStrings.LOAD_BALANCE_GATEWAYSENDER__HELP,
      key = CliStrings.LOAD_BALANCE_GATEWAYSENDER)
  @CliMetaData(relatedTopic = CliStrings.TOPIC_GEODE_WAN)
  @ResourceOperation(resource = ResourcePermission.Resource.CLUSTER,
      operation = ResourcePermission.Operation.MANAGE, target = ResourcePermission.Target.GATEWAY)
  public ResultModel loadBalanceGatewaySender(
      @ShellOption(value = CliStrings.LOAD_BALANCE_GATEWAYSENDER__ID,
          help = CliStrings.LOAD_BALANCE_GATEWAYSENDER__ID__HELP) String senderId) {

    if (senderId != null) {
      senderId = senderId.trim();
    }

    Cache cache = getCache();
    SystemManagementService service = getManagementService();

    Set<DistributedMember> dsMembers = getAllNormalMembers();
    if (dsMembers.isEmpty()) {
      return ResultModel.createInfo(CliStrings.GATEWAY_MSG_MEMBERS_NOT_FOUND);
    }

    ResultModel resultModel = new ResultModel();
    TabularResultModel resultData = resultModel.addTable(CliStrings.LOAD_BALANCE_GATEWAYSENDER);

    boolean gatewaySenderExists = false;
    for (DistributedMember member : dsMembers) {
      GatewaySenderMXBean bean;
      if (cache.getDistributedSystem().getDistributedMember().getId().equals(member.getId())) {
        bean = service.getLocalGatewaySenderMXBean(senderId);
      } else {
        ObjectName objectName = service.getGatewaySenderMBeanName(member, senderId);
        bean = service.getMBeanProxy(objectName, GatewaySenderMXBean.class);
      }
      if (bean != null) {
        gatewaySenderExists = true;
        bean.rebalance();
        resultData.addMemberStatusResultRow(member.getId(),
            CliStrings.GATEWAY_OK, CliStrings.format(
                CliStrings.GATEWAY_SENDER_0_IS_REBALANCED_ON_MEMBER_1, senderId, member.getId()));
      } else {
        resultData.addMemberStatusResultRow(member.getId(),
            CliStrings.GATEWAY_ERROR,
            CliStrings.format(CliStrings.GATEWAY_SENDER_0_IS_NOT_AVAILABLE_ON_MEMBER_1, senderId,
                member.getId()));
      }
    }

    if (!gatewaySenderExists) {
      return ResultModel.createInfo(CliStrings.format(
          CliStrings.GATEWAY_SENDER_0_IS_NOT_FOUND_ON_ANY_MEMBER, new Object[] {senderId}));
    }

    return resultModel;
  }
}
