/******************************
* 说明：日志输入Socket协议
* 创建人：龚宇超
* 创建日期：2018-01-23
* 修改人：
* 修改日期：
* 修改备注：
* 版本：1.0.0.0
******************************/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Sockets;
using System.IO;
using log4net.Core;
using System.Windows.Forms;

namespace Lskj.SocketService
{
    /// <summary>
    /// 日志输入Socket协议
    /// </summary>
    public class LogOutputSocketProtocol : BaseSocketProtocol
    {
        private LogFixedBuffer _logFixedBuffer;
        public LogFixedBuffer LogFixedBuffer { get { return _logFixedBuffer; } }

        public LogOutputSocketProtocol(AsyncSocketServer asyncSocketServer, AsyncSocketUserToken asyncSocketUserToken)
            : base(asyncSocketServer, asyncSocketUserToken)
        {
            _socketFlag = "LogOutput";
            _logFixedBuffer = new LogFixedBuffer();
            lock (SocketApp.AsyncSocketSvr.LogOutputSocketProtocolMgr)
            {
                SocketApp.AsyncSocketSvr.LogOutputSocketProtocolMgr.Add(this);
            }

            SendResponse();
        }

        public override void Close()
        {
            lock (SocketApp.AsyncSocketSvr.LogOutputSocketProtocolMgr)
            {
                SocketApp.AsyncSocketSvr.LogOutputSocketProtocolMgr.Remove(this);
            }
        }

        public override bool ProcessReceive(byte[] buffer, int offset, int count)
        {
            _activeDT = DateTime.UtcNow;
            if (count == 1)
            {
                if (buffer[0] == (byte)Keys.Escape)
                    return false;
                else
                    return SendResponse();
            }
            else
                return SendResponse();
        }

        public override bool SendCallback()
        {
            bool result = base.SendCallback();
            if (_logFixedBuffer.DataCount > 0)
            {
                result = DoSendBuffer(_logFixedBuffer.FixedBuffer, 0, _logFixedBuffer.DataCount);
                _logFixedBuffer.Clear();
            }
            return result;
        }

        //主动发送，如果没有回调的时候，需要主动下发，否则等待回调
        public bool InitiativeSend()
        {
            if (!_sendAsync)
            {
                return SendCallback();
            }
            else
                return true;
        }

        public bool SendResponse()
        {
            return InitiativeSend();
        }
    }

    public class LogOutputSocketProtocolMgr : Object
    {
        private List<LogOutputSocketProtocol> _list;

        public LogOutputSocketProtocolMgr()
        {
            _list = new List<LogOutputSocketProtocol>();
        }

        public int Count()
        {
            return _list.Count;
        }

        public LogOutputSocketProtocol ElementAt(int index)
        {
            return _list.ElementAt(index);
        }

        public void Add(LogOutputSocketProtocol value)
        {
            _list.Add(value);
        }

        public void Remove(LogOutputSocketProtocol value)
        {
            _list.Remove(value);
        }
    }

    public class LogFixedBuffer : Object
    {
        private byte[] _fixedBuffer;
        public byte[] FixedBuffer { get { return _fixedBuffer; } }
        private int _dataCount;
        public int DataCount { get { return _dataCount; } }

        public LogFixedBuffer()
        {
            _fixedBuffer = new byte[1024 * 16]; //申请大小为16K
            _dataCount = 0;
        }

        public void WriteBuffer(byte[] buffer, int offset, int count)
        {
            if ((_fixedBuffer.Length - _dataCount) >= count) //如果长度够，则复制内存
            {
                Array.Copy(buffer, offset, _fixedBuffer, _dataCount, count);
                _dataCount = _dataCount + count;
            }
        }

        public void WriteBuffer(byte[] buffer)
        {
            WriteBuffer(buffer, 0, buffer.Length);
        }

        public void WriteString(string value)
        {
            byte[] tmpBuffer = Encoding.ASCII.GetBytes(value);
            WriteBuffer(tmpBuffer);
        }

        public void Clear()
        {
            _dataCount = 0;
        }
    }

    //扩展log4net的日志输出
    class LogSocketAppender : log4net.Appender.AppenderSkeleton
    {
        public LogSocketAppender()
        {
            Name = "LogSocketAppender";
        }

        protected override void Append(LoggingEvent loggingEvent)
        {
            string strLoggingMessage = RenderLoggingEvent(loggingEvent);
            byte[] tmpBuffer = Encoding.Default.GetBytes(strLoggingMessage);
            lock (SocketApp.AsyncSocketSvr.LogOutputSocketProtocolMgr)
            {
                for (int i = 0; i < SocketApp.AsyncSocketSvr.LogOutputSocketProtocolMgr.Count(); i++)
                {
                    SocketApp.AsyncSocketSvr.LogOutputSocketProtocolMgr.ElementAt(i).LogFixedBuffer.WriteBuffer(tmpBuffer);
                    SocketApp.AsyncSocketSvr.LogOutputSocketProtocolMgr.ElementAt(i).InitiativeSend();
                }
            }
        }
    }
}