using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;

namespace HPSocketCS.Extended
{
    /// <summary>
    /// 客户端接收数据缓存对象
    /// </summary>
   public class ReceiveCacheBuffer
    {
       public ReceiveCacheBuffer() { 
     
       }
       public ReceiveCacheBuffer(Int64 _generateId)
       {
           this.generateId = _generateId;
       }
       Int64 generateId;
       /// <summary>
       /// 标识ID
       /// </summary>
       public Int64 GenerateId
       {
           get { return generateId; }
           set { generateId = value; }
       }

       string saveToFileName;
       /// <summary>
       /// 下载文件时，下载的文件要保存的路径文件名
       /// </summary>
       public string SaveToFileName
       {
           get { return saveToFileName; }
           set { saveToFileName = value; }
       }

       System.IO.MemoryStream dataBuffer = new System.IO.MemoryStream();
       /// <summary>
       /// 数据缓存
       /// </summary>
       public System.IO.MemoryStream DataBuffer
       {
           get { return dataBuffer; }
           set { dataBuffer = value; }
       }

       long length;
       /// <summary>
       /// 数据长度
       /// </summary>
       public long Length
       {
           get { return length; }
           set { length = value; }
       }

     /*  long _dataBufferLength;
       /// <summary>
       /// 数据到缓存区和数据长度
       /// </summary>
       public long DataBufferLength
       {
           get { return _dataBufferLength; }
       }*/

       /// <summary>
       /// 添加数据到缓存区
       /// </summary>
       /// <param name="bytes"></param>
       public void AddDataToBuffer(byte[] bytes)
       {
           dataBuffer.Write(bytes,0,bytes.Length);
           //dataBuffer.Flush();
          // this._dataBufferLength = bytes.Length;
          // dataBuffer = Marshal.AllocHGlobal(bytes.Length);
          // Marshal.Copy(bytes, 0, dataBuffer, bytes.Length);
       }
       /// <summary>
       /// 获取缓存区中的数据
       /// </summary>
       /// <returns></returns>
       public byte[] GetBufferInData()
       {
           try
           {
              // byte[] retBytes = new byte[DataBufferLength];
              // Marshal.Copy(dataBuffer, retBytes, 0, retBytes.Length);
               return dataBuffer.GetBuffer();
           }
           catch {
               return null;
           }
       }
       /// <summary>
       /// 接收完成
       /// </summary>
       /// <param name="recBytes"></param>
       public bool ReceiveComplete(byte[] recBytes, bool isComplete)
       {
           try
           {
               this.IsReceiveComplete = isComplete;
               this.AddDataToBuffer(recBytes);
               if (this.IsReceiveComplete)
               {
                   this.MEvent.Set();
                   if (this.CallbackFunction != null)
                   {
                       this.CallbackFunction(new ReturnResultObject(generateId, dataBuffer.GetBuffer()));
                   }
               }
               return true;
           }
           catch {
               return false;
           }
       }


       System.ComponentModel.BackgroundWorker backgroundWorker;
       /// <summary>
       /// 线程操作对象
       /// </summary>
       public System.ComponentModel.BackgroundWorker BackgroundWorker
       {
           get { return backgroundWorker; }
           set { backgroundWorker = value; }
       }

       DelegateExecuteThreadStart callbackFunction;
       /// <summary>
       /// 回调函数
       /// </summary>
       public DelegateExecuteThreadStart CallbackFunction
       {
           get { return callbackFunction; }
           set { callbackFunction = value; }
       }

       bool isReceiveComplete = false;
       /// <summary>
       /// 是否接收完成
       /// </summary>
       public bool IsReceiveComplete
       {
           get { return isReceiveComplete; }
           set { isReceiveComplete = value; }
       }

       AutoResetEvent mEvent = new AutoResetEvent(false);
       /// <summary>
       /// 线程通知
       /// </summary>
       public AutoResetEvent MEvent
       {
           get { return mEvent; }
           set { mEvent = value; }
       }
       /// <summary>
       /// 释放当前对象使用的资源
       /// </summary>
       public void Dispose()
       {
           try
           {
              /* if (dataBuffer != IntPtr.Zero)
               {
                   Marshal.FreeHGlobal(dataBuffer);
               }*/
               this.dataBuffer.Close();
               this.dataBuffer.Dispose();
               this.dataBuffer = null;
           }
           catch { 
             
           }
           try
           {
               mEvent.Set();
               mEvent.Close();
               mEvent.Dispose();
               mEvent = null;
           }
           catch { }
       }
    }
}