using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using CommonNetwork_ICE.Util;
using CommonNetwork_ICE.Common;
using Slice;
using CommonLang.Log;

namespace CommonNetwork_ICE.Msg
{
    /// <summary>
    /// 客户端消息包循环发送处理类
    /// </summary>
    public class ClientMessageQueue
    {
        private static Logger log = LoggerFactory.GetLogger("ClientMessageQueue");
        // 待发送消息队列
        private static Queue<TransMessage> queue = new Queue<TransMessage>();
        // 消息队列绑定线程
        private Thread thread;
        // 是否运行线程
        private bool runFlag;
        // 发送的数据包序列号
        private long sentSerial;
        // 超时时间
        private int timeout = Env.SEND_WAIT_ACK_TIME_OUT;

        public ClientMessageQueue()
        {
            this.sentSerial = 0;
            this.LastSerial = 0;
        }

        // 发送接口
        public IceConnector Connector { get; set; }
        // 服务器返回的数据包序列号
        public long LastSerial { set; get; }

        public void Start()
        {
            thread = new Thread(Run);
            runFlag = true;
            thread.Start();
        }

        public void End()
        {
            runFlag = false;
            if (thread != null)
            {
                thread.Join();
                thread.Abort();
            }
        }

        /// <summary>
        /// 加入新消息
        /// </summary>
        /// <param name="message"></param>
        public void AddMessage(TransMessage message)
        {
            queue.Enqueue(message);
        }

        /// <summary>
        /// 消息发送
        /// </summary>
        private void Run()
        {
            TransMessage preMessage = null;
            DateTime preDateTime = DateTime.Now;
            while (runFlag || queue.Count > 0)
            {
                try
                {
                    // 当前发送数据包的应答序号号未收到
                    if (sentSerial != LastSerial)
                    {
                        // 是否在发送超时时间内
                        if (preDateTime.AddSeconds(timeout) < DateTime.Now)
                        {
                            if (preMessage != null)
                            {
                                try
                                {
                                    Connector.Sender.SendData(Connector.GetConnectorConfig().LocalPort, preMessage);
                                }
                                catch (Exception e)
                                {
                                    log.Error("客户端重发数据错误:" + e.Message);
                                    continue;
                                }
                                log.Trace("没收到关键包应答，客户端重发数据:" + preMessage.serial);
                                preDateTime = DateTime.Now;
                            }
                            continue;
                        }
                        else
                        {
                            log.Trace("没收到关键包应答，等待当前序列号数据包:" + sentSerial);
                            Thread.Sleep(Env.SEND_WAIT_ACT_THREAD_SLEEP_TIME);
                            continue;
                        }
                    }
                    if (queue.Count > 0)
                    {
                        // 发送数据包
                        TransMessage outMessage = queue.Dequeue();
                        try
                        {
                            Connector.Sender.SendData(Connector.GetConnectorConfig().LocalPort, outMessage);
                        }
                        catch (Exception e)
                        {
                            log.Error("消息循环发送数据错误:" + e.Message);
                            continue;
                        }
                        preDateTime = DateTime.Now;
                        // 如果是关键数据包，记录序列号，进入下一个发送周期
                        if (outMessage.type == Constants.PACKET_HINGE)
                        {
                            sentSerial = outMessage.serial;
                            preMessage = outMessage;
                        }
                    }
                }
                catch (Exception err)
                {
                    log.Error(err.Message, err);
                }
            }
        }
    }
}