package org.apache.helix.tools;

/*
 * 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.
 */

import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import org.I0Itec.zkclient.DataUpdater;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.OptionGroup;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.helix.HelixAdmin;
import org.apache.helix.HelixConstants;
import org.apache.helix.HelixException;
import org.apache.helix.PropertyKey.Builder;
import org.apache.helix.ZNRecord;
import org.apache.helix.manager.zk.ZKHelixAdmin;
import org.apache.helix.manager.zk.ZKHelixDataAccessor;
import org.apache.helix.manager.zk.ZNRecordSerializer;
import org.apache.helix.manager.zk.ZkBaseDataAccessor;
import org.apache.helix.manager.zk.client.HelixZkClient;
import org.apache.helix.manager.zk.client.SharedZkClientFactory;
import org.apache.helix.model.BuiltInStateModelDefinitions;
import org.apache.helix.model.ClusterConfig;
import org.apache.helix.model.ClusterConstraints;
import org.apache.helix.model.ClusterConstraints.ConstraintType;
import org.apache.helix.model.ConstraintItem;
import org.apache.helix.model.ExternalView;
import org.apache.helix.model.HelixConfigScope;
import org.apache.helix.model.HelixConfigScope.ConfigScopeProperty;
import org.apache.helix.model.IdealState;
import org.apache.helix.model.IdealState.RebalanceMode;
import org.apache.helix.model.InstanceConfig;
import org.apache.helix.model.LiveInstance;
import org.apache.helix.model.StateModelDefinition;
import org.apache.helix.model.builder.ConstraintItemBuilder;
import org.apache.helix.model.builder.HelixConfigScopeBuilder;
import org.apache.helix.util.HelixUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ClusterSetup {
  private static Logger logger = LoggerFactory.getLogger(ClusterSetup.class);
  public static final String zkServerAddress = "zkSvr";

  // List info about the cluster / resource / Instances
  public static final String listClusters = "listClusters";
  public static final String listResources = "listResources";
  public static final String listInstances = "listInstances";

  // Add, drop, and rebalance
  public static final String addCluster = "addCluster";
  public static final String activateCluster = "activateCluster";
  public static final String dropCluster = "dropCluster";
  public static final String dropResource = "dropResource";
  public static final String addInstance = "addNode";
  public static final String addResource = "addResource";
  public static final String addStateModelDef = "addStateModelDef";
  public static final String addIdealState = "addIdealState";
  public static final String swapInstance = "swapInstance";
  public static final String dropInstance = "dropNode";
  public static final String rebalance = "rebalance";
  public static final String expandCluster = "expandCluster";
  public static final String expandResource = "expandResource";
  public static final String mode = "mode";
  public static final String tag = "tag";
  public static final String instanceGroupTag = "instanceGroupTag";
  public static final String bucketSize = "bucketSize";
  public static final String resourceKeyPrefix = "key";
  public static final String maxPartitionsPerNode = "maxPartitionsPerNode";

  public static final String addResourceProperty = "addResourceProperty";
  public static final String removeResourceProperty = "removeResourceProperty";

  public static final String addInstanceTag = "addInstanceTag";
  public static final String removeInstanceTag = "removeInstanceTag";

  public static final String enableResource = "enableResource";

  // Query info (TBD in V2)
  public static final String listClusterInfo = "listClusterInfo";
  public static final String listInstanceInfo = "listInstanceInfo";
  public static final String listResourceInfo = "listResourceInfo";
  public static final String listPartitionInfo = "listPartitionInfo";
  public static final String listStateModels = "listStateModels";
  public static final String listStateModel = "listStateModel";

  // enable/disable/reset instances/cluster/resource/partition
  public static final String enableInstance = "enableInstance";
  public static final String enablePartition = "enablePartition";
  public static final String enableCluster = "enableCluster";
  public static final String resetPartition = "resetPartition";
  public static final String resetInstance = "resetInstance";
  public static final String resetResource = "resetResource";

  // help
  public static final String help = "help";

  // get/set/remove configs
  public static final String getConfig = "getConfig";
  public static final String setConfig = "setConfig";
  public static final String removeConfig = "removeConfig";

  // get/set/remove constraints
  public static final String getConstraints = "getConstraints";
  public static final String setConstraint = "setConstraint";
  public static final String removeConstraint = "removeConstraint";

  static Logger _logger = LoggerFactory.getLogger(ClusterSetup.class);
  String _zkServerAddress;
  HelixZkClient _zkClient;
  HelixAdmin _admin;

  public ClusterSetup(String zkServerAddress) {
    _zkServerAddress = zkServerAddress;
    _zkClient = SharedZkClientFactory.getInstance()
        .buildZkClient(new HelixZkClient.ZkConnectionConfig(_zkServerAddress));
    _zkClient.setZkSerializer(new ZNRecordSerializer());
    _admin = new ZKHelixAdmin(_zkClient);
  }

  public ClusterSetup(HelixZkClient zkClient) {
    _zkServerAddress = zkClient.getServers();
    _zkClient = zkClient;
    _admin = new ZKHelixAdmin(_zkClient);
  }

  public ClusterSetup(HelixZkClient zkClient, HelixAdmin zkHelixAdmin) {
    _zkServerAddress = zkClient.getServers();
    _zkClient = zkClient;
    _admin = zkHelixAdmin;
  }

  public void addCluster(String clusterName, boolean overwritePrevious) {
    _admin.addCluster(clusterName, overwritePrevious);

    for (BuiltInStateModelDefinitions def : BuiltInStateModelDefinitions.values()) {
      addStateModelDef(clusterName, def.getStateModelDefinition().getId(),
                       def.getStateModelDefinition(), overwritePrevious);
    }
  }

  public void activateCluster(String clusterName, String grandCluster, boolean enable) {
    if (enable) {
      _admin.addClusterToGrandCluster(clusterName, grandCluster);
    } else {
      _admin.dropResource(grandCluster, clusterName);
    }
  }

  public void deleteCluster(String clusterName) {
    _admin.dropCluster(clusterName);
  }

  public void addInstancesToCluster(String clusterName, String[] instanceInfoArray) {
    for (String instanceInfo : instanceInfoArray) {
      if (instanceInfo.length() > 0) {
        addInstanceToCluster(clusterName, instanceInfo);
      }
    }
  }

  public void addInstanceToCluster(String clusterName, String instanceId) {
    InstanceConfig config = InstanceConfig.toInstanceConfig(instanceId);
    _admin.addInstance(clusterName, config);
  }

  public void addInstanceTag(String clusterName, String instanceName, String tag) {
    _admin.addInstanceTag(clusterName, instanceName, tag);
  }

  public void dropInstancesFromCluster(String clusterName, String[] instanceInfoArray) {
    for (String instanceInfo : instanceInfoArray) {
      if (instanceInfo.length() > 0) {
        dropInstanceFromCluster(clusterName, instanceInfo);
      }
    }
  }

  public void dropInstanceFromCluster(String clusterName, String instanceId) {
    ZKHelixDataAccessor accessor =
        new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(_zkClient));
    Builder keyBuilder = accessor.keyBuilder();

    InstanceConfig instanceConfig = InstanceConfig.toInstanceConfig(instanceId);
    instanceId = instanceConfig.getInstanceName();

    // ensure node is not live
    LiveInstance liveInstance = accessor.getProperty(keyBuilder.liveInstance(instanceId));
    if (liveInstance != null) {
      throw new HelixException(String
          .format("Cannot drop instance %s as it is still live. Please stop it first", instanceId));
    }

    InstanceConfig config = accessor.getProperty(keyBuilder.instanceConfig(instanceId));
    if (config == null) {
      String error = "Node " + instanceId + " does not exist, cannot drop";
      _logger.warn(error);
      throw new HelixException(error);
    }

    ClusterConfig clusterConfig = accessor.getProperty(keyBuilder.clusterConfig());
    // ensure node is disabled, otherwise fail
    if (config.getInstanceEnabled() && (clusterConfig.getDisabledInstances() == null
        || !clusterConfig.getDisabledInstances().containsKey(instanceId))) {
      String error = "Node " + instanceId + " is enabled, cannot drop";
      _logger.warn(error);
      throw new HelixException(error);
    }
    _admin.dropInstance(clusterName, config);
  }

  /**
   * For CUSTOMIZED and SEMI_AUTO resources, this tool is used to change instance mapping
   * in the cluster. When a node is replaced in the cluster, we just change preference list
   * and map field in IdealState lf all resource, to replace old instance with new instance
   *
   * This method will ignore all resource with FULL_AUTO.
   * This method will ensure that old instance is disabled AND not alive, but it's OK that new
   * instance is just created, not live / enabled yet
   *
   * @param clusterName cluster name
   * @param oldInstanceName old instance to swap out
   * @param newInstanceName new instance to add to
   */
  public void swapInstance(String clusterName, final String oldInstanceName, final String newInstanceName) {
    if (oldInstanceName.equals(newInstanceName)) {
      _logger.info("Old instance has same name as new instance, no need to swap");
      return;
    }

    ZKHelixDataAccessor accessor =
        new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(_zkClient));
    Builder keyBuilder = accessor.keyBuilder();

    // If new instance config is missing, new instance is not in good state and therefore
    // should not perform swap.
    // It is OK that we miss old instance config for idempotency of this method
    InstanceConfig newConfig = accessor.getProperty(keyBuilder.instanceConfig(newInstanceName));
    if (newConfig == null) {
      String error = "New instance " + newInstanceName + " does not exist, cannot swap";
      _logger.warn(error);
      throw new HelixException(error);
    }

    try {
      // drop instance will ensure the old instance is disabled, and not live, or it will
      // throw exception
      dropInstanceFromCluster(clusterName, oldInstanceName);
    } catch (HelixException e) {
      // If old instance is already gone, continue to swap. Note that it is possible
      // that do to some error, we still keep a disabled record of old instance in
      // cluster config, we don't strictly check and fix that
      if (e.toString().contains("does not exist")) {
        _logger.warn("Instance {} does not exist, continue to swap instance for cluster {}",
            oldInstanceName, clusterName);
      } else {
        _logger.warn("Failed to drop instance {} from cluster {}", oldInstanceName, clusterName, e);
        throw e;
      }
    }

    // When the amount of ideal state data is huge, we might only read partially from ZK
    // so the safest way is to list first and read each individual ideal state
    List<String> existingIdealStateNames =
        accessor.getChildNames(accessor.keyBuilder().idealStates());

    for (final String resourceName : existingIdealStateNames) {
      IdealState resourceIdealState =
          accessor.getProperty(accessor.keyBuilder().idealStates(resourceName));
      if (resourceIdealState.getRebalanceMode().equals(RebalanceMode.FULL_AUTO)) {
        _logger.warn("Resource {} is in FULL_AUTO rebalance mode, don't swap", resourceName);
        continue;
      }
      // For CUSTOMIZED and SEMI_AUTO rebalance mode, swap instance
      swapInstanceInIdealState(resourceIdealState, oldInstanceName, newInstanceName);

      // Update ideal state
      accessor.updateProperty(accessor.keyBuilder().idealStates(resourceName),
          new DataUpdater<ZNRecord>() {
            @Override
            public ZNRecord update(ZNRecord znRecord) {
              if (znRecord == null) {
                throw new HelixException(String.format(
                    "swapInstance DataUpdater: IdealState for resource %s no longer exists!",
                    resourceName));
              }
              // Need to swap again in case there are added partition with old instance
              swapInstanceInIdealState(new IdealState(znRecord), oldInstanceName, newInstanceName);
              return znRecord;
            }
          }, resourceIdealState);
      _logger.info("Successfully swapped instance for resource {}", resourceName);
    }
  }

  /**
   * Replace old instance name in map field and list field with new instance name
   * @param idealState ideal state object
   * @param oldInstance old instance name
   * @param newInstance new instance name
   */
  void swapInstanceInIdealState(IdealState idealState, String oldInstance, String newInstance) {
    for (String partition : idealState.getRecord().getMapFields().keySet()) {
      Map<String, String> valMap = idealState.getRecord().getMapField(partition);
      if (valMap.containsKey(oldInstance)) {
        valMap.put(newInstance, valMap.get(oldInstance));
        valMap.remove(oldInstance);
      }
    }

    for (String partition : idealState.getRecord().getListFields().keySet()) {
      List<String> valList = idealState.getRecord().getListField(partition);
      for (int i = 0; i < valList.size(); i++) {
        if (valList.get(i).equals(oldInstance)) {
          valList.remove(i);
          valList.add(i, newInstance);
        }
      }
    }
  }

  public HelixAdmin getClusterManagementTool() {
    return _admin;
  }

  public void addStateModelDef(String clusterName, String stateModelDef,
      StateModelDefinition record) {
    _admin.addStateModelDef(clusterName, stateModelDef, record);
  }

  public void addStateModelDef(String clusterName, String stateModelDef,
      StateModelDefinition record, boolean overwritePrevious) {
    _admin.addStateModelDef(clusterName, stateModelDef, record, overwritePrevious);
  }

  public void addResourceToCluster(String clusterName, String resourceName, IdealState idealState) {
    _admin.addResource(clusterName, resourceName, idealState);
  }

  public void addResourceToCluster(String clusterName, String resourceName, int numPartitions,
      String stateModelRef) {
    addResourceToCluster(clusterName, resourceName, numPartitions, stateModelRef,
        RebalanceMode.SEMI_AUTO.toString());
  }

  public void addResourceToCluster(String clusterName, String resourceName, int numPartitions,
      String stateModelRef, String rebalancerMode) {
    _admin.addResource(clusterName, resourceName, numPartitions, stateModelRef, rebalancerMode);
  }

  public void addResourceToCluster(String clusterName, String resourceName, int numPartitions,
      String stateModelRef, String rebalancerMode, String rebalanceStrategy) {
    _admin.addResource(clusterName, resourceName, numPartitions, stateModelRef, rebalancerMode,
        rebalanceStrategy);
  }

  public void addResourceToCluster(String clusterName, String resourceName, int numPartitions,
      String stateModelRef, String rebalancerMode, int bucketSize) {
    _admin.addResource(clusterName, resourceName, numPartitions, stateModelRef, rebalancerMode,
        bucketSize);
  }

  public void addResourceToCluster(String clusterName, String resourceName, int numPartitions,
      String stateModelRef, String rebalancerMode, int bucketSize, int maxPartitionsPerInstance) {
    _admin.addResource(clusterName, resourceName, numPartitions, stateModelRef, rebalancerMode,
        bucketSize, maxPartitionsPerInstance);
  }

  /**
   * Get the mangled IdealState name if resourceGroup/resourceTag is enable.
   */
  public static String genIdealStateNameWithResourceTag(String resourceName, String resourceTag) {
    return resourceName + "$" + resourceTag;
  }

  /**
   * Create an IdealState for a resource that belongs to a resource group We use
   * "resourceGroupName$resourceInstanceTag" as the IdealState znode name to differetiate different
   * resources from the same resourceGroup.
   */
  public IdealState createIdealStateForResourceGroup(String resourceGroupName,
      String resourceTag, int numPartition, int replica, String rebalanceMode, String stateModelDefName) {
    String idealStateId = genIdealStateNameWithResourceTag(resourceGroupName, resourceTag);
    IdealState idealState = new IdealState(idealStateId);
    idealState.setNumPartitions(numPartition);
    idealState.setStateModelDefRef(stateModelDefName);
    IdealState.RebalanceMode mode =
        idealState.rebalanceModeFromString(rebalanceMode, IdealState.RebalanceMode.SEMI_AUTO);
    idealState.setRebalanceMode(mode);
    idealState.setReplicas("" + replica);
    idealState.setStateModelFactoryName(HelixConstants.DEFAULT_STATE_MODEL_FACTORY);
    idealState.setResourceGroupName(resourceGroupName);
    idealState.setInstanceGroupTag(resourceTag);
    idealState.enableGroupRouting(true);

    return idealState;
  }

  /**
   * Enable or disable a resource within a resource group associated with a given resource tag
   *
   * @param clusterName
   * @param resourceName
   * @param resourceTag
   */
  public void enableResource(String clusterName, String resourceName, String resourceTag,
      boolean enabled) {
    String idealStateId = genIdealStateNameWithResourceTag(resourceName, resourceTag);
    _admin.enableResource(clusterName, idealStateId, enabled);
  }

  public void dropResourceFromCluster(String clusterName, String resourceName) {
    _admin.dropResource(clusterName, resourceName);
  }

  // TODO: remove this. has moved to ZkHelixAdmin
  public void rebalanceStorageCluster(String clusterName, String resourceName, int replica) {
    rebalanceStorageCluster(clusterName, resourceName, replica, resourceName);
  }

  public void rebalanceResource(String clusterName, String resourceName, int replica) {
    rebalanceStorageCluster(clusterName, resourceName, replica, resourceName);
  }

  public void expandResource(String clusterName, String resourceName) {
    IdealState idealState = _admin.getResourceIdealState(clusterName, resourceName);
    if (idealState.getRebalanceMode() == RebalanceMode.FULL_AUTO
        || idealState.getRebalanceMode() == RebalanceMode.CUSTOMIZED) {
      _logger.info("Skipping idealState " + idealState.getResourceName() + " "
          + idealState.getRebalanceMode());
      return;
    }
    boolean anyLiveInstance = false;
    for (List<String> list : idealState.getRecord().getListFields().values()) {
      if (list.contains(IdealState.IdealStateConstants.ANY_LIVEINSTANCE.toString())) {
        _logger.info("Skipping idealState " + idealState.getResourceName()
            + " with ANY_LIVEINSTANCE");
        anyLiveInstance = true;
        continue;
      }
    }
    if (anyLiveInstance) {
      return;
    }
    try {
      int replica = Integer.parseInt(idealState.getReplicas());
    } catch (Exception e) {
      _logger.error("", e);
      return;
    }
    if (idealState.getRecord().getListFields().size() == 0) {
      _logger.warn("Resource " + resourceName + " not balanced, skip");
      return;
    }
    balanceIdealState(clusterName, idealState);
  }

  public void expandCluster(String clusterName) {
    List<String> resources = _admin.getResourcesInCluster(clusterName);
    for (String resourceName : resources) {
      expandResource(clusterName, resourceName);
    }
  }

  public void balanceIdealState(String clusterName, IdealState idealState) {
    // The new instances are added into the cluster already. So we need to find out the
    // instances that
    // already have partitions assigned to them.
    List<String> instanceNames = _admin.getInstancesInCluster(clusterName);
    rebalanceResource(clusterName, idealState, instanceNames);

  }

  private void rebalanceResource(String clusterName, IdealState idealState,
      List<String> instanceNames) {
    _admin.rebalance(clusterName, idealState, instanceNames);
  }

  public void rebalanceStorageCluster(String clusterName, String resourceName, int replica,
      String keyPrefix) {
    _admin.rebalance(clusterName, resourceName, replica, keyPrefix, "");
  }

  public void rebalanceCluster(String clusterName, String resourceName, int replica,
      String keyPrefix, String group) {
    _admin.rebalance(clusterName, resourceName, replica, keyPrefix, group);
  }

  public void rebalanceStorageCluster(String clusterName, String resourceName, String group,
      int replica) {
    _admin.rebalance(clusterName, resourceName, replica, resourceName, group);
  }

  /**
   * set configs
   * @param type config-scope type, e.g. CLUSTER, RESOURCE, etc.
   * @param scopeArgsCsv scopeArgsCsv csv-formatted scope-args, e.g myCluster,testDB
   * @param keyValuePairs csv-formatted key-value pairs. e.g. k1=v1,k2=v2
   */
  public void setConfig(ConfigScopeProperty type, String scopeArgsCsv, String keyValuePairs) {
    // ConfigScope scope = new ConfigScopeBuilder().build(scopesKeyValuePairs);
    String[] scopeArgs = scopeArgsCsv.split("[\\s,]");
    HelixConfigScope scope = new HelixConfigScopeBuilder(type, scopeArgs).build();

    Map<String, String> keyValueMap = HelixUtil.parseCsvFormatedKeyValuePairs(keyValuePairs);
    _admin.setConfig(scope, keyValueMap);
  }

  /**
   * remove configs
   * @param type config-scope type, e.g. CLUSTER, RESOURCE, etc.
   * @param scopeArgsCsv csv-formatted scope-args, e.g myCluster,testDB
   * @param keysCsv csv-formatted keys. e.g. k1,k2
   */
  public void removeConfig(ConfigScopeProperty type, String scopeArgsCsv, String keysCsv) {
    // ConfigScope scope = new ConfigScopeBuilder().build(scopesStr);
    //
    // // parse keys
    // String[] keys = keysStr.split("[\\s,]");
    // Set<String> keysSet = new HashSet<String>(Arrays.asList(keys));

    String[] scopeArgs = scopeArgsCsv.split("[\\s,]");
    HelixConfigScope scope = new HelixConfigScopeBuilder(type, scopeArgs).build();

    String[] keys = keysCsv.split("[\\s,]");

    _admin.removeConfig(scope, Arrays.asList(keys));
  }

  /**
   * get configs
   * @param type config-scope-type, e.g. CLUSTER, RESOURCE, etc.
   * @param scopeArgsCsv csv-formatted scope-args, e.g myCluster,testDB
   * @param keysCsv csv-formatted keys. e.g. k1,k2
   * @return json-formated key-value pairs, e.g. {k1=v1,k2=v2}
   */
  public String getConfig(ConfigScopeProperty type, String scopeArgsCsv, String keysCsv) {
    // ConfigScope scope = new ConfigScopeBuilder().build(scopesStr);

    String[] scopeArgs = scopeArgsCsv.split("[\\s,]");
    HelixConfigScope scope = new HelixConfigScopeBuilder(type, scopeArgs).build();

    String[] keys = keysCsv.split("[\\s,]");
    // parse keys
    // String[] keys = keysStr.split("[\\s,]");
    // Set<String> keysSet = new HashSet<String>(Arrays.asList(keys));

    Map<String, String> keyValueMap = _admin.getConfig(scope, Arrays.asList(keys));
    ZNRecord record = new ZNRecord(type.toString());
    // record.setMapField(scopesStr, propertiesMap);
    record.getSimpleFields().putAll(keyValueMap);
    ZNRecordSerializer serializer = new ZNRecordSerializer();
    return new String(serializer.serialize(record));
  }

  /**
   * set constraint
   * @param clusterName
   * @param constraintType
   * @param constraintId
   * @param constraintAttributesMap : csv-formated constraint key-value pairs
   */
  public void setConstraint(String clusterName, String constraintType, String constraintId,
      String constraintAttributesMap) {
    if (clusterName == null || constraintType == null || constraintId == null
        || constraintAttributesMap == null) {
      throw new IllegalArgumentException(
          "fail to set constraint. missing clusterName|constraintType|constraintId|constraintAttributesMap");
    }

    ConstraintType type = ConstraintType.valueOf(constraintType);
    ConstraintItemBuilder builder = new ConstraintItemBuilder();
    Map<String, String> constraintAttributes =
        HelixUtil.parseCsvFormatedKeyValuePairs(constraintAttributesMap);
    ConstraintItem constraintItem = builder.addConstraintAttributes(constraintAttributes).build();
    _admin.setConstraint(clusterName, type, constraintId, constraintItem);
  }

  /**
   * remove constraint
   * @param clusterName
   * @param constraintType
   * @param constraintId
   */
  public void removeConstraint(String clusterName, String constraintType, String constraintId) {
    if (clusterName == null || constraintType == null || constraintId == null) {
      throw new IllegalArgumentException(
          "fail to remove constraint. missing clusterName|constraintType|constraintId");
    }

    ConstraintType type = ConstraintType.valueOf(constraintType);
    _admin.removeConstraint(clusterName, type, constraintId);
  }

  /**
   * get constraints associated with given type
   * @param constraintType : constraint-type. e.g. MESSAGE_CONSTRAINT
   * @return json-formated constraints
   */
  public String getConstraints(String clusterName, String constraintType) {
    if (clusterName == null || constraintType == null) {
      throw new IllegalArgumentException(
          "fail to get constraint. missing clusterName|constraintType");
    }

    ConstraintType type = ConstraintType.valueOf(constraintType);
    ClusterConstraints constraints = _admin.getConstraints(clusterName, type);
    return new String(constraints.serialize(new ZNRecordSerializer()));
  }

  /**
   * Sets up a cluster<br/>
   * 6 Instances[localhost:8900 to localhost:8905], <br/>
   * 1 resource[TestDB] with a replication factor of 3 and using MasterSlave state model<br/>
   * @param clusterName
   */
  public void setupTestCluster(String clusterName) {
    addCluster(clusterName, true);
    String instanceInfoArray[] = new String[6];
    for (int i = 0; i < instanceInfoArray.length; i++) {
      instanceInfoArray[i] = "localhost_" + (8900 + i);
    }
    addInstancesToCluster(clusterName, instanceInfoArray);
    addResourceToCluster(clusterName, "TestDB", 10, "MasterSlave");
    rebalanceStorageCluster(clusterName, "TestDB", 3);
  }

  public static void printUsage(Options cliOptions) {
    HelpFormatter helpFormatter = new HelpFormatter();
    helpFormatter.setWidth(1000);
    helpFormatter.printHelp("java " + ClusterSetup.class.getName(), cliOptions);
  }

  @SuppressWarnings("static-access")
  private static Options constructCommandLineOptions() {
    Option helpOption =
        OptionBuilder.withLongOpt(help).withDescription("Prints command-line options info")
            .create();

    Option zkServerOption =
        OptionBuilder.withLongOpt(zkServerAddress).withDescription("Provide zookeeper address")
            .create();
    zkServerOption.setArgs(1);
    zkServerOption.setRequired(true);
    zkServerOption.setArgName("ZookeeperServerAddress(Required)");

    Option listClustersOption =
        OptionBuilder.withLongOpt(listClusters).withDescription("List existing clusters").create();
    listClustersOption.setArgs(0);
    listClustersOption.setRequired(false);

    Option listResourceOption =
        OptionBuilder.withLongOpt(listResources)
            .withDescription("List resources hosted in a cluster").create();
    listResourceOption.setArgs(1);
    listResourceOption.setRequired(false);
    listResourceOption.setArgName("clusterName <-tag TagValue>");

    Option listInstancesOption =
        OptionBuilder.withLongOpt(listInstances).withDescription("List Instances in a cluster")
            .create();
    listInstancesOption.setArgs(1);
    listInstancesOption.setRequired(false);
    listInstancesOption.setArgName("clusterName <-tag tagName>");

    Option addClusterOption =
        OptionBuilder.withLongOpt(addCluster).withDescription("Add a new cluster").create();
    addClusterOption.setArgs(1);
    addClusterOption.setRequired(false);
    addClusterOption.setArgName("clusterName");

    Option activateClusterOption =
        OptionBuilder.withLongOpt(activateCluster)
            .withDescription("Enable/disable a cluster in distributed controller mode").create();
    activateClusterOption.setArgs(3);
    activateClusterOption.setRequired(false);
    activateClusterOption.setArgName("clusterName grandCluster true/false");

    Option deleteClusterOption =
        OptionBuilder.withLongOpt(dropCluster).withDescription("Delete a cluster").create();
    deleteClusterOption.setArgs(1);
    deleteClusterOption.setRequired(false);
    deleteClusterOption.setArgName("clusterName");

    Option addInstanceOption =
        OptionBuilder.withLongOpt(addInstance).withDescription("Add a new Instance to a cluster")
            .create();
    addInstanceOption.setArgs(2);
    addInstanceOption.setRequired(false);
    addInstanceOption.setArgName("clusterName InstanceId");

    Option addResourceOption =
        OptionBuilder.withLongOpt(addResource).withDescription("Add a resource to a cluster")
            .create();
    addResourceOption.setArgs(4);
    addResourceOption.setRequired(false);
    addResourceOption
        .setArgName("clusterName resourceName partitionNum stateModelRef <-mode modeValue>");

    Option expandResourceOption =
        OptionBuilder.withLongOpt(expandResource)
            .withDescription("Expand resource to additional nodes").create();
    expandResourceOption.setArgs(2);
    expandResourceOption.setRequired(false);
    expandResourceOption.setArgName("clusterName resourceName");

    Option expandClusterOption =
        OptionBuilder.withLongOpt(expandCluster)
            .withDescription("Expand a cluster and all the resources").create();
    expandClusterOption.setArgs(1);
    expandClusterOption.setRequired(false);
    expandClusterOption.setArgName("clusterName");

    Option resourceModeOption =
        OptionBuilder.withLongOpt(mode)
            .withDescription("Specify resource mode, used with addResourceGroup command").create();
    resourceModeOption.setArgs(1);
    resourceModeOption.setRequired(false);
    resourceModeOption.setArgName("IdealState mode");

    Option resourceTagOption =
        OptionBuilder.withLongOpt(tag)
            .withDescription("Specify resource tag, used with listResources command").create();
    resourceTagOption.setArgs(1);
    resourceTagOption.setRequired(false);
    resourceTagOption.setArgName("tag");

    Option resourceBucketSizeOption =
        OptionBuilder.withLongOpt(bucketSize)
            .withDescription("Specify size of a bucket, used with addResourceGroup command")
            .create();
    resourceBucketSizeOption.setArgs(1);
    resourceBucketSizeOption.setRequired(false);
    resourceBucketSizeOption.setArgName("Size of a bucket for a resource");

    Option maxPartitionsPerNodeOption =
        OptionBuilder.withLongOpt(maxPartitionsPerNode)
            .withDescription("Specify max partitions per node, used with addResourceGroup command")
            .create();
    maxPartitionsPerNodeOption.setArgs(1);
    maxPartitionsPerNodeOption.setRequired(false);
    maxPartitionsPerNodeOption.setArgName("Max partitions per node for a resource");

    Option resourceKeyOption =
        OptionBuilder.withLongOpt(resourceKeyPrefix)
            .withDescription("Specify resource key prefix, used with rebalance command").create();
    resourceKeyOption.setArgs(1);
    resourceKeyOption.setRequired(false);
    resourceKeyOption.setArgName("Resource key prefix");

    Option instanceGroupTagOption =
        OptionBuilder.withLongOpt(instanceGroupTag)
            .withDescription("Specify instance group tag, used with rebalance command").create();
    instanceGroupTagOption.setArgs(1);
    instanceGroupTagOption.setRequired(false);
    instanceGroupTagOption.setArgName("Instance group tag");

    Option addStateModelDefOption =
        OptionBuilder.withLongOpt(addStateModelDef)
            .withDescription("Add a State model to a cluster").create();
    addStateModelDefOption.setArgs(2);
    addStateModelDefOption.setRequired(false);
    addStateModelDefOption.setArgName("clusterName <filename>");

    Option addIdealStateOption =
        OptionBuilder.withLongOpt(addIdealState).withDescription("Add a State model to a cluster")
            .create();
    addIdealStateOption.setArgs(3);
    addIdealStateOption.setRequired(false);
    addIdealStateOption.setArgName("clusterName resourceName <filename>");

    Option dropInstanceOption =
        OptionBuilder.withLongOpt(dropInstance)
            .withDescription("Drop an existing Instance from a cluster").create();
    dropInstanceOption.setArgs(2);
    dropInstanceOption.setRequired(false);
    dropInstanceOption.setArgName("clusterName InstanceId");

    Option swapInstanceOption =
        OptionBuilder.withLongOpt(swapInstance)
            .withDescription("Swap an old instance from a cluster with a new instance").create();
    swapInstanceOption.setArgs(3);
    swapInstanceOption.setRequired(false);
    swapInstanceOption.setArgName("clusterName oldInstance newInstance");

    Option dropResourceOption =
        OptionBuilder.withLongOpt(dropResource)
            .withDescription("Drop an existing resource from a cluster").create();
    dropResourceOption.setArgs(2);
    dropResourceOption.setRequired(false);
    dropResourceOption.setArgName("clusterName resourceName");

    Option enableResourceOption =
        OptionBuilder.withLongOpt(enableResource).withDescription("Enable/disable a resource")
            .hasArgs(3).isRequired(false)
            .withArgName("clusterName resourceName true/false <-tag resourceTag>")
            .create();

    Option rebalanceOption =
        OptionBuilder.withLongOpt(rebalance).withDescription("Rebalance a resource in a cluster")
            .create();
    rebalanceOption.setArgs(3);
    rebalanceOption.setRequired(false);
    rebalanceOption.setArgName("clusterName resourceName replicas");

    Option instanceInfoOption =
        OptionBuilder.withLongOpt(listInstanceInfo)
            .withDescription("Query info of a Instance in a cluster").create();
    instanceInfoOption.setArgs(2);
    instanceInfoOption.setRequired(false);
    instanceInfoOption.setArgName("clusterName InstanceName");

    Option clusterInfoOption =
        OptionBuilder.withLongOpt(listClusterInfo).withDescription("Query info of a cluster")
            .create();
    clusterInfoOption.setArgs(1);
    clusterInfoOption.setRequired(false);
    clusterInfoOption.setArgName("clusterName");

    Option resourceInfoOption =
        OptionBuilder.withLongOpt(listResourceInfo).withDescription("Query info of a resource")
            .create();
    resourceInfoOption.setArgs(2);
    resourceInfoOption.setRequired(false);
    resourceInfoOption.setArgName("clusterName resourceName");

    Option addResourcePropertyOption =
        OptionBuilder.withLongOpt(addResourceProperty).withDescription("Add a resource property")
            .create();
    addResourcePropertyOption.setArgs(4);
    addResourcePropertyOption.setRequired(false);
    addResourcePropertyOption.setArgName("clusterName resourceName propertyName propertyValue");

    Option removeResourcePropertyOption =
        OptionBuilder.withLongOpt(removeResourceProperty)
            .withDescription("Remove a resource property").create();
    removeResourcePropertyOption.setArgs(3);
    removeResourcePropertyOption.setRequired(false);
    removeResourcePropertyOption.setArgName("clusterName resourceName propertyName");

    Option partitionInfoOption =
        OptionBuilder.withLongOpt(listPartitionInfo).withDescription("Query info of a partition")
            .create();
    partitionInfoOption.setArgs(3);
    partitionInfoOption.setRequired(false);
    partitionInfoOption.setArgName("clusterName resourceName partitionName");

    Option enableInstanceOption =
        OptionBuilder.withLongOpt(enableInstance).withDescription("Enable/disable an instance")
            .create();
    enableInstanceOption.setArgs(3);
    enableInstanceOption.setRequired(false);
    enableInstanceOption.setArgName("clusterName instanceName true/false");

    Option enablePartitionOption =
        OptionBuilder.hasArgs().withLongOpt(enablePartition)
            .withDescription("Enable/disable partitions").create();
    enablePartitionOption.setRequired(false);
    enablePartitionOption
        .setArgName("true/false clusterName instanceName resourceName partitionName1...");

    Option enableClusterOption =
        OptionBuilder.withLongOpt(enableCluster)
            .withDescription("pause/resume the controller of a cluster").create();
    enableClusterOption.setArgs(2);
    enableClusterOption.setRequired(false);
    enableClusterOption.setArgName("clusterName true/false");

    Option resetPartitionOption =
        OptionBuilder.withLongOpt(resetPartition)
            .withDescription("Reset a partition in error state").create();
    resetPartitionOption.setArgs(4);
    resetPartitionOption.setRequired(false);
    resetPartitionOption.setArgName("clusterName instanceName resourceName partitionName");

    Option resetInstanceOption =
        OptionBuilder.withLongOpt(resetInstance)
            .withDescription("Reset all partitions in error state for an instance").create();
    resetInstanceOption.setArgs(2);
    resetInstanceOption.setRequired(false);
    resetInstanceOption.setArgName("clusterName instanceName");

    Option resetResourceOption =
        OptionBuilder.withLongOpt(resetResource)
            .withDescription("Reset all partitions in error state for a resource").create();
    resetResourceOption.setArgs(2);
    resetResourceOption.setRequired(false);
    resetResourceOption.setArgName("clusterName resourceName");

    Option listStateModelsOption =
        OptionBuilder.withLongOpt(listStateModels)
            .withDescription("Query info of state models in a cluster").create();
    listStateModelsOption.setArgs(1);
    listStateModelsOption.setRequired(false);
    listStateModelsOption.setArgName("clusterName");

    Option listStateModelOption =
        OptionBuilder.withLongOpt(listStateModel)
            .withDescription("Query info of a state model in a cluster").create();
    listStateModelOption.setArgs(2);
    listStateModelOption.setRequired(false);
    listStateModelOption.setArgName("clusterName stateModelName");

    Option addInstanceTagOption =
        OptionBuilder.withLongOpt(addInstanceTag).withDescription("Add a tag to instance").create();
    addInstanceTagOption.setArgs(3);
    addInstanceTagOption.setRequired(false);
    addInstanceTagOption.setArgName("clusterName instanceName tag");
    Option removeInstanceTagOption =
        OptionBuilder.withLongOpt(removeInstanceTag).withDescription("Remove tag from instance")
            .create();
    removeInstanceTagOption.setArgs(3);
    removeInstanceTagOption.setRequired(false);
    removeInstanceTagOption.setArgName("clusterName instanceName tag");

    // TODO need deal with resource-names containing ","
    // set/get/remove configs options
    Option setConfOption =
        OptionBuilder
            .hasArgs(3)
            .isRequired(false)
            .withArgName(
                "ConfigScope(e.g. RESOURCE) ConfigScopeArgs(e.g. myCluster,testDB) KeyValueMap(e.g. k1=v1,k2=v2)")
            .withLongOpt(setConfig).withDescription("Set configs").create();

    Option getConfOption =
        OptionBuilder
            .hasArgs(3)
            .isRequired(false)
            .withArgName(
                "ConfigScope(e.g. RESOURCE) ConfigScopeArgs(e.g. myCluster,testDB) Keys(e.g. k1,k2)")
            .withLongOpt(getConfig).withDescription("Get configs").create();

    Option removeConfOption =
        OptionBuilder
            .hasArgs(3)
            .isRequired(false)
            .withArgName(
                "ConfigScope(e.g. RESOURCE) ConfigScopeArgs(e.g. myCluster,testDB) Keys(e.g. k1,k2)")
            .withLongOpt(removeConfig).withDescription("Remove configs").create();

    // set/get/remove constraints options
    Option setConstraintOption =
        OptionBuilder
            .hasArgs(4)
            .isRequired(false)
            .withArgName(
                "clusterName ConstraintType(e.g. MESSAGE_CONSTRAINT) ConstraintId KeyValueMap(e.g. k1=v1,k2=v2)")
            .withLongOpt(setConstraint)
            .withDescription("Set a constraint associated with a give id. create if not exist")
            .create();

    Option getConstraintsOption =
        OptionBuilder.hasArgs(2).isRequired(false)
            .withArgName("clusterName ConstraintType(e.g. MESSAGE_CONSTRAINT)")
            .withLongOpt(getConstraints)
            .withDescription("Get constraints associated with given type").create();

    Option removeConstraintOption =
        OptionBuilder.hasArgs(3).isRequired(false)
            .withArgName("clusterName ConstraintType(e.g. MESSAGE_CONSTRAINT) ConstraintId")
            .withLongOpt(removeConstraint)
            .withDescription("Remove a constraint associated with given id").create();

    OptionGroup group = new OptionGroup();
    group.setRequired(true);
    group.addOption(rebalanceOption);
    group.addOption(addResourceOption);
    group.addOption(resourceModeOption);
    group.addOption(resourceTagOption);
    group.addOption(resourceBucketSizeOption);
    group.addOption(maxPartitionsPerNodeOption);
    group.addOption(expandResourceOption);
    group.addOption(expandClusterOption);
    group.addOption(resourceKeyOption);
    group.addOption(addClusterOption);
    group.addOption(activateClusterOption);
    group.addOption(deleteClusterOption);
    group.addOption(addInstanceOption);
    group.addOption(listInstancesOption);
    group.addOption(listResourceOption);
    group.addOption(listClustersOption);
    group.addOption(addIdealStateOption);
    group.addOption(rebalanceOption);
    group.addOption(dropInstanceOption);
    group.addOption(swapInstanceOption);
    group.addOption(dropResourceOption);
    group.addOption(enableResourceOption);
    group.addOption(instanceInfoOption);
    group.addOption(clusterInfoOption);
    group.addOption(resourceInfoOption);
    group.addOption(partitionInfoOption);
    group.addOption(enableInstanceOption);
    group.addOption(enablePartitionOption);
    group.addOption(enableClusterOption);
    group.addOption(resetPartitionOption);
    group.addOption(resetInstanceOption);
    group.addOption(resetResourceOption);
    group.addOption(addStateModelDefOption);
    group.addOption(listStateModelsOption);
    group.addOption(listStateModelOption);
    group.addOption(addResourcePropertyOption);
    group.addOption(removeResourcePropertyOption);

    // set/get/remove config options
    group.addOption(setConfOption);
    group.addOption(getConfOption);
    group.addOption(removeConfOption);

    // set/get/remove constraint options
    group.addOption(setConstraintOption);
    group.addOption(getConstraintsOption);
    group.addOption(removeConstraintOption);

    group.addOption(addInstanceTagOption);
    group.addOption(removeInstanceTagOption);
    group.addOption(instanceGroupTagOption);

    Options options = new Options();
    options.addOption(helpOption);
    options.addOption(zkServerOption);
    options.addOptionGroup(group);
    return options;
  }

  // TODO: remove this. has moved to ZkHelixAdmin
  private static byte[] readFile(String filePath) throws IOException {
    File file = new File(filePath);

    int size = (int) file.length();
    byte[] bytes = new byte[size];
    DataInputStream dis = new DataInputStream(new FileInputStream(file));
    int read = 0;
    int numRead = 0;
    while (read < bytes.length && (numRead = dis.read(bytes, read, bytes.length - read)) >= 0) {
      read = read + numRead;
    }
    return bytes;
  }

  public static int processCommandLineArgs(String[] cliArgs) throws Exception {
    CommandLineParser cliParser = new GnuParser();
    Options cliOptions = constructCommandLineOptions();
    CommandLine cmd = null;

    try {
      cmd = cliParser.parse(cliOptions, cliArgs);
    } catch (ParseException pe) {
      System.err.println("CommandLineClient: failed to parse command-line options: "
          + pe.toString());
      printUsage(cliOptions);
      System.exit(1);
    }

    ClusterSetup setupTool = new ClusterSetup(cmd.getOptionValue(zkServerAddress));

    if (cmd.hasOption(addCluster)) {
      String clusterName = cmd.getOptionValue(addCluster);
      setupTool.addCluster(clusterName, false);
      return 0;
    }

    if (cmd.hasOption(activateCluster)) {
      String clusterName = cmd.getOptionValues(activateCluster)[0];
      String grandCluster = cmd.getOptionValues(activateCluster)[1];
      boolean enable = Boolean.parseBoolean(cmd.getOptionValues(activateCluster)[2]);
      setupTool.activateCluster(clusterName, grandCluster, enable);
      return 0;
    }

    if (cmd.hasOption(dropCluster)) {
      String clusterName = cmd.getOptionValue(dropCluster);
      setupTool.deleteCluster(clusterName);
      return 0;
    }

    if (cmd.hasOption(addInstance)) {
      String clusterName = cmd.getOptionValues(addInstance)[0];
      String instanceAddressInfo = cmd.getOptionValues(addInstance)[1];
      String[] instanceAddresses = instanceAddressInfo.split(";");
      setupTool.addInstancesToCluster(clusterName, instanceAddresses);
      return 0;
    }

    if (cmd.hasOption(addResource)) {
      String clusterName = cmd.getOptionValues(addResource)[0];
      String resourceName = cmd.getOptionValues(addResource)[1];
      int partitions = Integer.parseInt(cmd.getOptionValues(addResource)[2]);
      String stateModelRef = cmd.getOptionValues(addResource)[3];
      String modeValue = RebalanceMode.SEMI_AUTO.toString();
      if (cmd.hasOption(mode)) {
        modeValue = cmd.getOptionValues(mode)[0];
      }

      int bucketSizeVal = 0;
      if (cmd.hasOption(bucketSize)) {
        bucketSizeVal = Integer.parseInt(cmd.getOptionValues(bucketSize)[0]);
      }

      int maxPartitionsPerNodeVal = -1;
      if (cmd.hasOption(maxPartitionsPerNode)) {
        maxPartitionsPerNodeVal = Integer.parseInt(cmd.getOptionValues(maxPartitionsPerNode)[0]);
      }
      setupTool.addResourceToCluster(clusterName, resourceName, partitions, stateModelRef,
          modeValue, bucketSizeVal, maxPartitionsPerNodeVal);
      return 0;
    }

    if (cmd.hasOption(rebalance)) {
      String clusterName = cmd.getOptionValues(rebalance)[0];
      String resourceName = cmd.getOptionValues(rebalance)[1];
      int replicas = Integer.parseInt(cmd.getOptionValues(rebalance)[2]);
      String keyPrefixVal = "";
      String instanceGroupTagVal = "";
      if (cmd.hasOption(resourceKeyPrefix)) {
        keyPrefixVal = cmd.getOptionValue(resourceKeyPrefix);
      }
      if (cmd.hasOption(instanceGroupTag)) {
        instanceGroupTagVal = cmd.getOptionValue(instanceGroupTag);
      }
      setupTool.rebalanceCluster(clusterName, resourceName, replicas, keyPrefixVal,
          instanceGroupTagVal);
      return 0;
    }

    if (cmd.hasOption(expandCluster)) {
      String clusterName = cmd.getOptionValues(expandCluster)[0];

      setupTool.expandCluster(clusterName);
      return 0;
    }

    if (cmd.hasOption(expandResource)) {
      String clusterName = cmd.getOptionValues(expandResource)[0];
      String resourceName = cmd.getOptionValues(expandResource)[1];
      setupTool.expandResource(clusterName, resourceName);
      return 0;
    }

    if (cmd.hasOption(dropInstance)) {
      String clusterName = cmd.getOptionValues(dropInstance)[0];
      String instanceAddressInfo = cmd.getOptionValues(dropInstance)[1];
      String[] instanceAddresses = instanceAddressInfo.split(";");
      setupTool.dropInstancesFromCluster(clusterName, instanceAddresses);
      return 0;
    }

    if (cmd.hasOption(listClusters)) {
      List<String> clusters = setupTool.getClusterManagementTool().getClusters();

      System.out.println("Existing clusters:");
      for (String cluster : clusters) {
        System.out.println(cluster);
      }
      return 0;
    }

    if (cmd.hasOption(listResources)) {
      String clusterName = cmd.getOptionValue(listResources);
      List<String> resourceNames = null;
      if (cmd.hasOption(tag)) {
        String tagValue = cmd.getOptionValues(tag)[0];
        resourceNames = setupTool.getClusterManagementTool()
            .getResourcesInClusterWithTag(clusterName, tagValue);
        System.out.println(
            "Existing resources in cluster " + clusterName + " with tag " + tagValue + " :");
      } else {
        resourceNames = setupTool.getClusterManagementTool().getResourcesInCluster(clusterName);
        System.out.println("Existing resources in cluster " + clusterName + ":");
      }

      for (String resourceName : resourceNames) {
        System.out.println(resourceName);
      }
      return 0;
    } else if (cmd.hasOption(listClusterInfo)) {
      String clusterName = cmd.getOptionValue(listClusterInfo);
      List<String> resourceNames =
          setupTool.getClusterManagementTool().getResourcesInCluster(clusterName);
      List<String> instances =
          setupTool.getClusterManagementTool().getInstancesInCluster(clusterName);

      System.out.println("Existing resources in cluster " + clusterName + ":");
      for (String resourceName : resourceNames) {
        System.out.println(resourceName);
      }

      System.out.println("Instances in cluster " + clusterName + ":");
      for (String InstanceName : instances) {
        System.out.println(InstanceName);
      }
      return 0;
    } else if (cmd.hasOption(listInstances)) {
      String clusterName = cmd.getOptionValue(listInstances);

      List<String> instances;
      if (cmd.hasOption(tag)) {
        String instanceTag = cmd.getOptionValues(tag)[0];
        instances = setupTool.getClusterManagementTool()
            .getInstancesInClusterWithTag(clusterName, instanceTag);
      } else {
        instances =
            setupTool.getClusterManagementTool().getInstancesInCluster(clusterName);
      }

      System.out.println("Instances in cluster " + clusterName + ":");
      for (String instanceName : instances) {
        System.out.println(instanceName);
      }
      return 0;
    } else if (cmd.hasOption(listInstanceInfo)) {
      String clusterName = cmd.getOptionValues(listInstanceInfo)[0];
      String instanceName = cmd.getOptionValues(listInstanceInfo)[1];
      InstanceConfig config =
          setupTool.getClusterManagementTool().getInstanceConfig(clusterName, instanceName);

      String result = new String(config.serialize(new ZNRecordSerializer()));
      System.out.println("InstanceConfig: " + result);
      return 0;
    } else if (cmd.hasOption(listResourceInfo)) {
      // print out partition number, resource name and replication number
      // Also the ideal states and current states
      String clusterName = cmd.getOptionValues(listResourceInfo)[0];
      String resourceName = cmd.getOptionValues(listResourceInfo)[1];
      IdealState idealState =
          setupTool.getClusterManagementTool().getResourceIdealState(clusterName, resourceName);
      ExternalView externalView =
          setupTool.getClusterManagementTool().getResourceExternalView(clusterName, resourceName);

      if (idealState != null) {
        System.out.println("IdealState for " + resourceName + ":");
        System.out.println(new String(idealState.serialize(new ZNRecordSerializer())));
      } else {
        System.out.println("No idealState for " + resourceName);
      }

      System.out.println();

      if (externalView != null) {
        System.out.println("ExternalView for " + resourceName + ":");
        System.out.println(new String(externalView.serialize(new ZNRecordSerializer())));
      } else {
        System.out.println("No externalView for " + resourceName);
      }
      return 0;

    } else if (cmd.hasOption(listPartitionInfo)) {
      // print out where the partition master / slaves locates
      String clusterName = cmd.getOptionValues(listPartitionInfo)[0];
      String resourceName = cmd.getOptionValues(listPartitionInfo)[1];
      String partitionName = cmd.getOptionValues(listPartitionInfo)[2];
      IdealState idealState =
          setupTool.getClusterManagementTool().getResourceIdealState(clusterName, resourceName);
      ExternalView externalView =
          setupTool.getClusterManagementTool().getResourceExternalView(clusterName, resourceName);

      if (idealState != null) {
        ZNRecord partInfo = new ZNRecord(resourceName + "/" + partitionName);
        ZNRecord idealStateRec = idealState.getRecord();
        partInfo.setSimpleFields(idealStateRec.getSimpleFields());
        if (idealStateRec.getMapField(partitionName) != null) {
          partInfo.setMapField(partitionName, idealStateRec.getMapField(partitionName));
        }
        if (idealStateRec.getListField(partitionName) != null) {
          partInfo.setListField(partitionName, idealStateRec.getListField(partitionName));
        }
        System.out.println("IdealState for " + resourceName + "/" + partitionName + ":");
        System.out.println(new String(new ZNRecordSerializer().serialize(partInfo)));
      } else {
        System.out.println("No idealState for " + resourceName + "/" + partitionName);
      }

      System.out.println();

      if (externalView != null) {
        ZNRecord partInfo = new ZNRecord(resourceName + "/" + partitionName);
        ZNRecord extViewRec = externalView.getRecord();
        partInfo.setSimpleFields(extViewRec.getSimpleFields());
        if (extViewRec.getMapField(partitionName) != null) {
          partInfo.setMapField(partitionName, extViewRec.getMapField(partitionName));
        }
        if (extViewRec.getListField(partitionName) != null) {
          partInfo.setListField(partitionName, extViewRec.getListField(partitionName));
        }

        System.out.println("ExternalView for " + resourceName + "/" + partitionName + ":");
        System.out.println(new String(new ZNRecordSerializer().serialize(partInfo)));
      } else {
        System.out.println("No externalView for " + resourceName + "/" + partitionName);
      }
      return 0;

    } else if (cmd.hasOption(enableInstance)) {
      String clusterName = cmd.getOptionValues(enableInstance)[0];
      String instanceName = cmd.getOptionValues(enableInstance)[1];
      if (instanceName.contains(":")) {
        instanceName = instanceName.replaceAll(":", "_");
      }
      boolean enabled = Boolean.parseBoolean(cmd.getOptionValues(enableInstance)[2].toLowerCase());

      setupTool.getClusterManagementTool().enableInstance(clusterName, instanceName, enabled);
      return 0;
    } else if (cmd.hasOption(enableResource)) {
      String clusterName = cmd.getOptionValues(enableResource)[0];
      String resourceName = cmd.getOptionValues(enableResource)[1];
      boolean enabled = Boolean.parseBoolean(cmd.getOptionValues(enableResource)[2].toLowerCase());
      if (cmd.hasOption(tag)) {
        String resourceTag = cmd.getOptionValues(tag)[0];
        setupTool.enableResource(clusterName, resourceName, resourceTag, enabled);
      } else {
        setupTool.getClusterManagementTool().enableResource(clusterName, resourceName, enabled);
      }
    } else if (cmd.hasOption(enablePartition)) {
      String[] args = cmd.getOptionValues(enablePartition);

      boolean enabled = Boolean.parseBoolean(args[0].toLowerCase());
      String clusterName = args[1];
      String instanceName = args[2];
      String resourceName = args[3];

      List<String> partitionNames = Arrays.asList(Arrays.copyOfRange(args, 4, args.length));
      setupTool.getClusterManagementTool().enablePartition(enabled, clusterName, instanceName,
          resourceName, partitionNames);
      return 0;
    } else if (cmd.hasOption(resetPartition)) {
      String[] args = cmd.getOptionValues(resetPartition);

      String clusterName = args[0];
      String instanceName = args[1];
      String resourceName = args[2];
      List<String> partitionNames = Arrays.asList(Arrays.copyOfRange(args, 3, args.length));

      setupTool.getClusterManagementTool().resetPartition(clusterName, instanceName, resourceName,
          partitionNames);
      return 0;
    } else if (cmd.hasOption(resetInstance)) {
      String[] args = cmd.getOptionValues(resetInstance);

      String clusterName = args[0];
      List<String> instanceNames = Arrays.asList(Arrays.copyOfRange(args, 1, args.length));

      setupTool.getClusterManagementTool().resetInstance(clusterName, instanceNames);
      return 0;
    } else if (cmd.hasOption(resetResource)) {
      String[] args = cmd.getOptionValues(resetResource);

      String clusterName = args[0];
      List<String> resourceNames = Arrays.asList(Arrays.copyOfRange(args, 1, args.length));

      setupTool.getClusterManagementTool().resetResource(clusterName, resourceNames);
      return 0;
    } else if (cmd.hasOption(enableCluster)) {
      String[] params = cmd.getOptionValues(enableCluster);
      String clusterName = params[0];
      boolean enabled = Boolean.parseBoolean(params[1].toLowerCase());
      setupTool.getClusterManagementTool().enableCluster(clusterName, enabled);

      return 0;
    } else if (cmd.hasOption(listStateModels)) {
      String clusterName = cmd.getOptionValues(listStateModels)[0];

      List<String> stateModels =
          setupTool.getClusterManagementTool().getStateModelDefs(clusterName);

      System.out.println("Existing state models:");
      for (String stateModel : stateModels) {
        System.out.println(stateModel);
      }
      return 0;
    } else if (cmd.hasOption(listStateModel)) {
      String clusterName = cmd.getOptionValues(listStateModel)[0];
      String stateModel = cmd.getOptionValues(listStateModel)[1];
      StateModelDefinition stateModelDef =
          setupTool.getClusterManagementTool().getStateModelDef(clusterName, stateModel);
      String result = new String(new ZNRecordSerializer().serialize(stateModelDef.getRecord()));
      System.out.println("StateModelDefinition: " + result);
      return 0;
    } else if (cmd.hasOption(addStateModelDef)) {
      String clusterName = cmd.getOptionValues(addStateModelDef)[0];
      String stateModelFile = cmd.getOptionValues(addStateModelDef)[1];

      ZNRecord stateModelRecord =
          (ZNRecord) (new ZNRecordSerializer().deserialize(readFile(stateModelFile)));
      if (stateModelRecord.getId() == null || stateModelRecord.getId().length() == 0) {
        throw new IllegalArgumentException("ZNRecord for state model definition must have an id");
      }
      setupTool.getClusterManagementTool().addStateModelDef(clusterName, stateModelRecord.getId(),
          new StateModelDefinition(stateModelRecord));
      return 0;
    } else if (cmd.hasOption(addIdealState)) {
      String clusterName = cmd.getOptionValues(addIdealState)[0];
      String resourceName = cmd.getOptionValues(addIdealState)[1];
      String idealStateFile = cmd.getOptionValues(addIdealState)[2];

      setupTool.addIdealState(clusterName, resourceName, idealStateFile);
      return 0;
    } else if (cmd.hasOption(dropResource)) {
      String clusterName = cmd.getOptionValues(dropResource)[0];
      String resourceName = cmd.getOptionValues(dropResource)[1];

      setupTool.getClusterManagementTool().dropResource(clusterName, resourceName);
    } else if (cmd.hasOption(swapInstance)) {
      String clusterName = cmd.getOptionValues(swapInstance)[0];
      String oldInstanceName = cmd.getOptionValues(swapInstance)[1];
      String newInstanceName = cmd.getOptionValues(swapInstance)[2];

      setupTool.swapInstance(clusterName, oldInstanceName, newInstanceName);
    }
    // set/get/remove config options
    else if (cmd.hasOption(setConfig)) {
      String values[] = cmd.getOptionValues(setConfig);
      ConfigScopeProperty type = ConfigScopeProperty.valueOf(values[0]);
      String scopeArgs = values[1];
      String keyValueMap = values[2];
      setupTool.setConfig(type, scopeArgs, keyValueMap);
    } else if (cmd.hasOption(getConfig)) {
      String values[] = cmd.getOptionValues(getConfig);
      ConfigScopeProperty type = ConfigScopeProperty.valueOf(values[0]);
      String scopeArgs = values[1];
      String keys = values[2];
      setupTool.getConfig(type, scopeArgs, keys);
    } else if (cmd.hasOption(removeConfig)) {
      String values[] = cmd.getOptionValues(removeConfig);
      ConfigScopeProperty type = ConfigScopeProperty.valueOf(values[0]);
      String scoepArgs = values[1];
      String keys = values[2];
      setupTool.removeConfig(type, scoepArgs, keys);
    }
    // set/get/remove constraint options
    else if (cmd.hasOption(setConstraint)) {
      String values[] = cmd.getOptionValues(setConstraint);
      String clusterName = values[0];
      String constraintType = values[1];
      String constraintId = values[2];
      String constraintAttributesMap = values[3];
      setupTool.setConstraint(clusterName, constraintType, constraintId, constraintAttributesMap);
    } else if (cmd.hasOption(getConstraints)) {
      String values[] = cmd.getOptionValues(getConstraints);
      String clusterName = values[0];
      String constraintType = values[1];
      setupTool.getConstraints(clusterName, constraintType);
    } else if (cmd.hasOption(removeConstraint)) {
      String values[] = cmd.getOptionValues(removeConstraint);
      String clusterName = values[0];
      String constraintType = values[1];
      String constraintId = values[2];
      setupTool.removeConstraint(clusterName, constraintType, constraintId);
    } else if (cmd.hasOption(addInstanceTag)) {
      String clusterName = cmd.getOptionValues(addInstanceTag)[0];
      String instanceName = cmd.getOptionValues(addInstanceTag)[1];
      String tag = cmd.getOptionValues(addInstanceTag)[2];
      setupTool.getClusterManagementTool().addInstanceTag(clusterName, instanceName, tag);
    } else if (cmd.hasOption(removeInstanceTag)) {
      String clusterName = cmd.getOptionValues(removeInstanceTag)[0];
      String instanceName = cmd.getOptionValues(removeInstanceTag)[1];
      String tag = cmd.getOptionValues(removeInstanceTag)[2];
      setupTool.getClusterManagementTool().removeInstanceTag(clusterName, instanceName, tag);
    }
    // help option
    else if (cmd.hasOption(help)) {
      printUsage(cliOptions);
      return 0;
    } else if (cmd.hasOption(addResourceProperty)) {
      String clusterName = cmd.getOptionValues(addResourceProperty)[0];
      String resourceName = cmd.getOptionValues(addResourceProperty)[1];
      String propertyKey = cmd.getOptionValues(addResourceProperty)[2];
      String propertyVal = cmd.getOptionValues(addResourceProperty)[3];

      setupTool.addResourceProperty(clusterName, resourceName, propertyKey, propertyVal);
      return 0;
    } else if (cmd.hasOption(removeResourceProperty)) {
      String clusterName = cmd.getOptionValues(removeResourceProperty)[0];
      String resourceName = cmd.getOptionValues(removeResourceProperty)[1];
      String propertyKey = cmd.getOptionValues(removeResourceProperty)[2];

      setupTool.removeResourceProperty(clusterName, resourceName, propertyKey);
      return 0;
    }
    return 0;
  }

  // TODO: remove this. has moved to ZkHelixAdmin
  public void addIdealState(String clusterName, String resourceName, String idealStateFile)
      throws IOException {
    ZNRecord idealStateRecord =
        (ZNRecord) (new ZNRecordSerializer().deserialize(readFile(idealStateFile)));
    if (idealStateRecord.getId() == null || !idealStateRecord.getId().equals(resourceName)) {
      throw new IllegalArgumentException("ideal state must have same id as resource name");
    }
    _admin.setResourceIdealState(clusterName, resourceName, new IdealState(idealStateRecord));
  }

  public void addResourceProperty(String clusterName, String resourceName, String propertyKey,
      String propertyVal) {
    IdealState idealState = _admin.getResourceIdealState(clusterName, resourceName);
    if (idealState == null) {
      throw new HelixException("Resource: " + resourceName + " has NOT been added yet");
    }
    idealState.getRecord().setSimpleField(propertyKey, propertyVal);
    _admin.setResourceIdealState(clusterName, resourceName, idealState);
  }

  public void removeResourceProperty(String clusterName, String resourceName, String propertyKey) {
    IdealState idealState = _admin.getResourceIdealState(clusterName, resourceName);
    if (idealState == null) {
      throw new HelixException("Resource: " + resourceName + " has NOT been added yet");
    }
    idealState.getRecord().getSimpleFields().remove(propertyKey);
    _admin.setResourceIdealState(clusterName, resourceName, idealState);
  }

  /**
   * @param args
   * @throws Exception
   */
  public static void main(String[] args) throws Exception {
    if (args.length == 1 && args[0].equals("setup-test-cluster")) {
      System.out
          .println("By default setting up TestCluster with 6 instances, 10 partitions, Each partition will have 3 replicas");
      new ClusterSetup("localhost:2181").setupTestCluster("TestCluster");
      System.exit(0);
    }

    int ret = processCommandLineArgs(args);
    System.exit(ret);
  }
}
