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

namespace POSV.Utils
{
    public class CardOperateUtils
    {

        private static NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();

        private int _mifare_handle = 0;

        private const int TIMER_INTERVAL = 1000;

        private static CardOperateUtils _instance = null;

        private bool _termination = false;

        private bool _isUsing = false;

        public static CardOperateUtils Instance
        {
            get
            {
                if(_instance == null)
                {
                    _instance = new CardOperateUtils();
                }
                return _instance;
            }
        }

        /// <summary>
        /// 中止
        /// </summary>
        public void TerminationCardRead()
        {
            if (_isUsing)
            {
                _termination = true;
            }
        }

        public void InitReader()
        {
            InitReader(0, 9600);
        }

        /// <summary>
        /// 初始化
        /// </summary>
        /// <returns></returns>
        public void InitReader(short port, int baud)
        {
            if(_mifare_handle == 0)
            {
                _mifare_handle = MifareCardUtils.Init(port, baud);
            }
        }

        /// <summary>
        /// 自动初始化单次读卡
        /// </summary>
        /// <returns></returns>
        public Tuple<bool, string> ReadCardNo()
        {
            InitReader();
            return ReadCardNo(true);
        }

        public Tuple<bool, string> ReadCardNoContinue()
        {
            if (_isUsing)
            {
                return new Tuple<bool, string>(false, "正在读卡，请稍后重试！");
            }
            _isUsing = true;
            _termination = false;
            Tuple<bool, string> result = new Tuple<bool, string>(false, "读卡失败");
            try
            {
                InitReader();
                if (_mifare_handle > 0)
                {
                    
                    
                    var res = ReadCardNo(false);
                    if (res.Item1)
                    {
                        result = res;
                    }
                    
                    
                }
                else
                {
                    result = new Tuple<bool, string>(false, "读卡器打开失败！");
                }
            }
            catch(Exception ex)
            {
                logger.Error(ex, "持续读卡发生异常");
                result = new Tuple<bool, string>(false, "读卡发生异常！");
            }
            finally
            {
                CloseCardReader();
                _termination = false;
                _isUsing = false;
            }
            return result;
        }

        /// <summary>
        /// 单次读卡 初始化读卡器 - 读卡 - 关闭读卡器
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        public Tuple<bool, string> ReadCardNo(bool autoClose)
        {
            try
            {
                if (_mifare_handle > 0)
                {
                    logger.Info("读卡器连接成功! 开始寻找会员卡!");
                    Tuple<int, string> status = MifareCardUtils.Card(_mifare_handle);

                    if (status.Item1 == 0)
                    {
                        logger.Info("检测到会员卡");

                        //开始读卡
                        Tuple<int, string> data31 = MifareCardUtils.Read(_mifare_handle, 0, 0, 1);

                        //卡号第一部分
                        Tuple<int, string> data1 = MifareCardUtils.Read(_mifare_handle, 0, 1, 0);
                        //卡号第二部分
                        Tuple<int, string> data2 = MifareCardUtils.Read(_mifare_handle, 0, 1, 1);
                        if (data31.Item1 == 0 && data1.Item1 == 0 && data2.Item1 == 0)
                        {
                            var cardNo = data1.Item2 + data2.Item2;
                            logger.Info("读卡成功！卡号为[{0}]", cardNo);

                            //是否蜂鸣
                            MifareCardUtils.Beep(_mifare_handle, 25);
                            MifareCardUtils.Halt(_mifare_handle);

                            return new Tuple<bool, string>(true, cardNo.Replace("\0", ""));
                        }
                        else
                        {
                            MifareCardUtils.Halt(_mifare_handle);
                            return new Tuple<bool, string>(false, "读卡失败,请移开后重试");
                        }
                    }
                    else
                    {
                        
                        return new Tuple<bool, string>(false, "请将会员卡放置在读卡区");
                    }

                }
                else
                {
                    return new Tuple<bool, string>(false, "读卡器连接失败！");
                }
            }
            catch(Exception ex)
            {
                logger.Error(ex, "读卡发生异常");
                return new Tuple<bool, string>(false, "读卡发生异常");
            }
            finally
            {
                if (autoClose) CloseCardReader();
            }
        }

        /// <summary>
        /// 关闭读卡器
        /// </summary>
        /// <param name="mifare_handle"></param>
        public void CloseCardReader()
        {
            try
            {
                logger.Info("关闭读卡器!");
                if (_mifare_handle > 0)
                {
                    int status = MifareCardUtils.Exit(_mifare_handle);
                    if (status == 0)
                    {
                        logger.Info("断开读卡器连接!");
                    }
                    else
                    {
                        logger.Info("读卡器连接断开失败:{0}", status);
                    }
                }
                else
                {
                    logger.Info("没有连接读卡器");
                }
            }
            catch(Exception ex)
            {
                logger.Error(ex, "关闭读卡器发生异常！");
            }
            finally
            {
                _mifare_handle = 0;
            }
        }
    }
}