using BPA.Helper;
using System.Text.RegularExpressions;

namespace BPASmartClient.Nfc
{
    public class NFCHelper
    {
        private volatile static NFCHelper _Instance;
        public static NFCHelper GetInstance => _Instance ?? (_Instance = new NFCHelper());
        private NFCHelper() { }

        public ReadResult GetReadResult { get; set; } = new ReadResult();

        public Action Update { get; set; }

        //转换卡号专用
        private byte[] convertSNR(string str, int keyN)
        {
            string regex = "[^a-fA-F0-9]";
            string tmpJudge = Regex.Replace(str, regex, "");

            //长度不对，直接退回错误
            if (tmpJudge.Length != 12) return null;

            string[] tmpResult = Regex.Split(str, regex);
            byte[] result = new byte[keyN];
            int i = 0;
            foreach (string tmp in tmpResult)
            {
                result[i] = Convert.ToByte(tmp, 16);
                i++;
            }
            return result;
        }

        //数据输入判断函数2个
        private string formatStr(string str, int num_blk)
        {

            string tmp = Regex.Replace(str, "[^a-fA-F0-9]", "");
            //长度不对直接报错
            //num_blk==-1指示不用检查位数
            if (num_blk == -1) return tmp;
            //num_blk==其它负数，为-1/num_blk
            if (num_blk < -1)
            {
                if (tmp.Length != -16 / num_blk * 2) return null;
                else return tmp;
            }
            if (tmp.Length != 16 * num_blk * 2) return null;
            else return tmp;
        }
        private void convertStr(byte[] after, string before, int length)
        {
            for (int i = 0; i < length; i++)
            {
                after[i] = Convert.ToByte(before.Substring(2 * i, 2), 16);
            }
        }

        //显示命令执行结果
        private string showStatue(int Code)
        {
            string msg = "";
            switch (Code)
            {
                case 0x00:
                    msg = "命令执行成功";
                    break;
                case 0x01:
                    msg = "命令操作失败";
                    break;
                case 0x02:
                    msg = "地址校验错误";
                    break;
                case 0x03:
                    msg = "找不到已选择的端口";
                    break;
                case 0x04:
                    msg = "读写器返回超时";
                    break;
                case 0x05:
                    msg = "数据包流水号不正确";
                    break;
                case 0x07:
                    msg = "接收异常";
                    break;
                case 0x0A:
                    msg = "参数值超出范围";
                    break;
                case 0x80:
                    msg = "参数设置成功";
                    break;
                case 0x81:
                    msg = "参数设置失败";
                    break;
                case 0x82:
                    msg = "通讯超时";
                    break;
                case 0x83:
                    msg = "卡不存在";
                    break;
                case 0x84:
                    msg = "接收卡数据出错";
                    break;
                case 0x85:
                    msg = "未知的错误";
                    break;
                case 0x87:
                    msg = "输入参数或者输入命令格式错误";
                    break;
                case 0x89:
                    msg = "输入的指令代码不存在";
                    break;
                case 0x8A:
                    msg = "在对于卡块初始化命令中出现错误";
                    break;
                case 0x8B:
                    msg = "在防冲突过程中得到错误的序列号";
                    break;
                case 0x8C:
                    msg = "密码认证没通过";
                    break;
                case 0x8F:
                    msg = "读取器接收到未知命令";
                    break;
                case 0x90:
                    msg = "卡不支持这个命令";
                    break;
                case 0x91:
                    msg = "命令格式有错误";
                    break;
                case 0x92:
                    msg = "在命令的FLAG参数中，不支持OPTION 模式";
                    break;
                case 0x93:
                    msg = "要操作的BLOCK不存在";
                    break;
                case 0x94:
                    msg = "要操作的对象已经别锁定，不能进行修改";
                    break;
                case 0x95:
                    msg = "锁定操作不成功";
                    break;
                case 0x96:
                    msg = "写操作不成功";
                    break;
                default:
                    msg = "未知错误2";
                    break;
            }
            return msg;
        }

        /// <summary>
        /// 结果显示
        /// </summary>
        /// <param name="text"></param>
        /// <param name="data"></param>
        /// <param name="s"></param>
        /// <param name="e"></param>
        private string showData(byte[] data, int s, int e)
        {
            string res = string.Empty;
            //非负转换
            for (int i = 0; i < e; i++)
            {
                if (data[s + i] < 0)
                    data[s + i] = Convert.ToByte(Convert.ToInt32(data[s + i]) + 256);
            }

            for (int i = 0; i < e; i++)
            {
                res += data[s + i].ToString("X2") + " ";
            }
            return res;
        }

        public void Init()
        {
            ThreadManage.GetInstance().StartLong(new Action(() =>
            {
                Read();
                if (GetReadResult.ErrorInfo.Length > 0) MessageLog.GetInstance.Show(GetReadResult.ErrorInfo);
                Thread.Sleep(1000);
            }), "NFC数据读取");
        }

        public void Read(ReadKeyEnum readKeyEnum = ReadKeyEnum.KeyA, ReadTypeEnum readTypeEnum = ReadTypeEnum.Idle, byte ReadStart = 16, byte ReadNum = 1)
        {
            //数据是一个64位的长整形，读取块的数量就是指第几个字

            if (ReadStart < 0 || ReadStart > 63) return;
            if (ReadNum <= 0 || ReadNum > 4) return;
            byte mode1 = (readKeyEnum == ReadKeyEnum.KeyB) ? (byte)0x01 : (byte)0x00;
            byte mode2 = (readTypeEnum == ReadTypeEnum.All) ? (byte)0x01 : (byte)0x00;
            byte mode = (byte)((mode1 << 1) | mode2);
            byte blk_add = ReadStart;
            byte num_blk = ReadNum;
            //秘钥：
            //第一组：FF FF FF FF FF FF
            //第二组：B0 B1 B2 B3 B4 B5
            //第三组：A0 A1 A2 A3 A4 A5
            byte[] snr = new byte[6];
            snr = convertSNR("FF FF FF FF FF FF", 6);
            if (snr == null)
            {
                GetReadResult.ErrorInfo = "序列号无效!";
                return;
            }

            byte[] buffer = new byte[16 * num_blk];
            try
            {
                int nRet = Reader.MF_Read(mode, blk_add, num_blk, snr, buffer);
                GetReadResult.StatueCode = showStatue(nRet);
                if (nRet != 0)
                {
                    GetReadResult.StatueCode = showStatue(buffer[0]);
                    GetReadResult.CardNum = string.Empty;
                    GetReadResult.Data = string.Empty;
                }
                else
                {
                    GetReadResult.CardNum = showData(snr, 0, 4);
                    GetReadResult.Data = showData(buffer, 0, 16 * num_blk);
                }
            }
            catch (Exception ex)
            {
                GetReadResult.CardNum = string.Empty;
                GetReadResult.Data = string.Empty;
                MessageLog.GetInstance.Show(ex.ToString());
            }
            finally
            {
                Update?.Invoke();
            }
        }
    }
}