using System;
using System.IO;
using System.IO.Ports;
using System.Threading;

namespace RailLocalMeter
{
    public class RfidRailWayNo
    {
        Log lg = Log.GetInstance();

        SerialPort serialPort1;
        bool blThreadFlag = false;
       
        private object obj = new object();
        private Thread mThread = null;

        /// <summary>
        /// comPara是配置文件中的comPara
        /// </summary>
        /// <param name="comPara"></param>
        public void StartThreadSweep(out string msg)
        {
            #region 串口采集配置
            Parity parity = Parity.None;

            switch (AppConfigCache.comParity) 
            {
                case "ODD": parity = Parity.Odd; break;
                case "EVEN": parity = Parity.Even; break;
                default: break;
            }

            StopBits stopBits = StopBits.None;

            switch (AppConfigCache.comStopBits) 
            {
                case "1": stopBits = StopBits.One; break;
                case "1.5": stopBits = StopBits.OnePointFive; break;
                case "2": stopBits = StopBits.Two; break;
                default: break;
            }
            
            serialPort1 = new SerialPort(AppConfigCache.comPort, AppConfigCache.comBaud, parity, AppConfigCache.comLength, stopBits);
            int icnt = 0;
            msg = "";
            while (!serialPort1.IsOpen)
            {
                try
                {
                    icnt++;
                    serialPort1.Open();
                }
                catch (Exception err)
                {
                    lg.WriteLog(LogType.RfidLoc, $"打开串口失败,正重试{err.Message}");
                }
                System.Threading.Thread.Sleep(500);
                if (icnt > 5)
                {
                    msg = "串口打开失败，请检查串口是否存在，且是否被占用";
                    return;
                }
            }

            #endregion
            blThreadFlag = true;
            mThread = new Thread(new ThreadStart(ThreadSweepInfo));
            mThread.Start();
        }

        /// <summary>
        /// 扫码信息读取
        /// </summary>
        /// <returns></returns>
        private void ThreadSweepInfo()
        {
            try
            {
                while (blThreadFlag)
                {
                    lock (obj)
                    {
                        Thread.Sleep(100);
                        string strtmp = "";
                        if (serialPort1.BytesToRead > 0)
                        {
                            strtmp = serialPort1.ReadExisting();
                        }
                        strtmp = strtmp.Split(new char[] { '\r' })[0];
                        if (strtmp != "")
                        { 
                            if (CacleCls.rfidCarNo != strtmp) 
                            {
                                CacleCls.rfidCarNo = strtmp;
                                lg.WriteLog(LogType.RfidLoc, $"读卡器读取的数据：{strtmp}");
                            }
                        }
                    }
                }
            }
            catch (Exception exp)
            {
                lg.WriteLog(LogType.RfidLoc, $"读卡器数据读取异常：{exp.Message}");
            }
        }
        /// <summary>
        /// 关闭线程
        /// </summary>
        /// <returns></returns>
        public bool CloseThread()
        {
            try
            {
                blThreadFlag = false;
                Close();
                return true;
            }
            catch
            {
                return false;
            }
        }


        /// <summary>
        /// 关闭扫描枪
        /// </summary>
        private void Close()
        {
            lg.WriteLog(LogType.RfidLoc, $"读卡器关闭");
            if (serialPort1 != null && serialPort1.IsOpen) serialPort1.Close();
        }
    }
}