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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
 *
 * Licensed 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. See accompanying
 * LICENSE file.
 */

package com.gemstone.gemfire.internal.admin.remote;

import com.gemstone.gemfire.DataSerializable;
import com.gemstone.gemfire.DataSerializer;
import com.gemstone.gemfire.cache.*;
import com.gemstone.gemfire.internal.admin.*;

import java.util.*;
import java.io.*;

public class RemoteRegionSnapshot implements RegionSnapshot, DataSerializable {
  private static final long serialVersionUID = -2006079857403000280L;
  private String name;
  private RemoteRegionAttributes attributes;
  private RemoteCacheStatistics stats;
  private int entryCount;
  private int subregionCount;
  private Object userAttribute;

  public RemoteRegionSnapshot(Region r) throws CacheException {

    this.name = r.getName();    
    RegionAttributes rAttr = r.getAttributes();
    this.attributes = new RemoteRegionAttributes(rAttr);
    if (rAttr.getStatisticsEnabled()) {
      this.stats = new RemoteCacheStatistics(r.getStatistics());
    } else {
      this.stats = new RemoteCacheStatistics();
    }
    this.attributes = new RemoteRegionAttributes(r.getAttributes());
    Set nameSet = r.keys();
    this.entryCount = nameSet.size();
    Set subRegions = r.subregions(false);
    this.subregionCount = subRegions.size();
    Object attr = r.getUserAttribute();
    if (attr != null) {
      this.userAttribute = attr.getClass().getName() + "\"" + attr.toString() + "\"";
    } else {
      this.userAttribute = null;
    }
  }

  /**
   * This constructor is only for use by the DataSerializableMechanism
   */
  public RemoteRegionSnapshot() {}

  public Object getName() {
    return this.name;
  }

  public long getLastModifiedTime() {     
    return stats.getLastModifiedTime();
  }

  public long getLastAccessTime() {
    return stats.getLastAccessedTime();
  }

  public long getNumberOfHits() {
    return stats.getHitCount();
  }

  public long getNumberOfMisses() {
    return stats.getMissCount();
  }

  public float getHitRatio() {
    return stats.getHitRatio();
  }
  
  public RegionAttributes getAttributes() {
    return this.attributes;
//     if (rUserAttributes != null) {
//       Iterator it = rUserAttributes.entrySet().iterator();
//       while (it.hasNext()) {
//         Map.Entry me = (Map.Entry)it.next();
//         result.setUserAttribute(me.getKey(), me.getValue());
//       }
//     }
  }

  public int getEntryCount() {
    return entryCount;
  }

  public int getSubregionCount() {
    return subregionCount;
  }

  public Object getUserAttribute() {
    return userAttribute;
  }

//  private String getDesc(Object o) {
//    if (o == null) {
//      return "";
//    } else {
//      return o.getClass().getName();
//    }
//  }

  @Override
  public boolean equals(Object other) {
    if (other == this) return true;
    if (other instanceof RemoteRegionSnapshot) {
      RemoteRegionSnapshot snap = (RemoteRegionSnapshot)other;
      return this.name.equals(snap.name);
    }
    return false;    
  }

  @Override
  public int hashCode() {
    return this.name.hashCode();
  }

  @Override
  public String toString() {
    return getName().toString();
  }

  public void toData(DataOutput out) throws IOException {
    DataSerializer.writeString(this.name, out);
    DataSerializer.writeObject(this.stats, out);
    DataSerializer.writeObject(this.attributes, out);
    out.writeInt(this.entryCount);
    out.writeInt(this.subregionCount);
    DataSerializer.writeObject(this.userAttribute, out);
  }

  public void fromData(DataInput in) throws IOException,
      ClassNotFoundException {
    this.name = DataSerializer.readString(in);
    this.stats = (RemoteCacheStatistics)DataSerializer.readObject(in);
    this.attributes = (RemoteRegionAttributes)DataSerializer.readObject(in);
    this.entryCount = in.readInt();
    this.subregionCount = in.readInt();
    this.userAttribute = DataSerializer.readObject(in);
  }
}