/* $Id$
 *
 * Copyright 2007-2008 Cisco Systems Inc.
 *
 * 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.
 */

using System;
using System.Collections.Generic;

using etch.examples.distmap.types.DistributedHashTable;

///<summary>Your custom implementation of BaseDistributedHashTableServer. Add methods here to provide
///implementation of messages from the client. </summary>
namespace etch.examples.distmap
{
    ///<summary>Implementation for ImplDistributedHashTableServer</summary>
    public class ImplDistributedHashTableServer : BaseDistributedHashTableServer
    {
        /// <summary>Constructs the ImplDistributedHashTableServer.</summary>
        /// <param name="client">a connection to the client session. Use this to
        /// send a message to the client.</param>
        /// <param name="map"></param>
        public ImplDistributedHashTableServer(RemoteDistributedHashTableClient client, IDictionary<string, object> map)
        {
            this.map = map;
        }

        private IDictionary<string, object> map;


        /// <summary>
        /// Gets all elements in DHT
        /// </summary>
        /// <returns>An array of entries</returns>
        public override Entry[] getAll()
        {
            lock (map)
            {
                Entry[] list = new Entry[map.Count];
                int index = 0;
                foreach (string str in map.Keys)
                {
                    list[index++] = new Entry(str, map[str]);
                }
                return list;
            }
        }
        /// <summary>
        /// Gets an object from DHT
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public override object getObject(string key)
        {
            object value;
            if (!map.TryGetValue(key, out value))
            {
                Console.WriteLine(" {0} not found in DHT ", key);
            }

            return value;
        }

        /// <summary>
        /// Puts object in Map
        /// </summary>
        /// <param name="key"></param>
        /// <param name="value"></param>
        /// <returns></returns>
        public override object putObject(string key, object value)
        {
            map.Add(key, value);
            return value;
        }


        /// <summary>
        /// Removes Object from DHT
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public override object removeObject(string key)
        {
            map.Remove(key);
            return null;
        }
    
        /// <summary>
        /// Gets Size of DHT
        /// </summary>
        /// <returns></returns>
        public override int? size()
        {
            return map.Count;
        }
    }
}