using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace DotNettyFrom.util
{
    public class CmdUtil
    {
        public static string FilterCmd(string msg)
        {
            Regex reg = new Regex(@"\[\w+\]"); //注意里面的引号 要用双引号表示，而不是用反斜
            Match match = reg.Match(msg);
            string its = match.ToString();
            its = its.Replace("[", "").Replace("]", "");
            return its;
        }

        public static string GenetorCcid()
        {
            Random random = new Random();

            int[] ccids = new int[20];

            ccids[0] = random.Next(31, 40);
            for (int i = 1; i < ccids.Length; i++)
            {
                ccids[i] = random.Next(30, 40);
            }

            return string.Join("", ccids);
        }


        public static string FrontWithZero(string str, int len)
        {
            int delta = len - str.Length;
            string sb = "";
            for (int i = 0; i < delta; i++)
            {
                sb += "0";
            }
            return sb + str;
        }

        public static string Dec2Hex(int dec)
        {
            return Convert.ToString(dec, 16);
        }


        public static int Hex2Dec(string hex)
        {
            return int.Parse(hex, NumberStyles.HexNumber);
        }

        public static string HexToBin(string hex)
        {
            int res = Hex2Dec(hex);
            return FrontWithZero(Convert.ToString(res, 2), 8);
        }

        public static string CalcCrcCode2(string str)
        {
            List<string> list = new List<string>();
            for (int i = 0; i < str.Length; i += 2)
            {
                list.Add(str.Substring(i, 2));
            }

            int result = 0;
            for (int i = 0; i < list.Count; i++)
            {
                result ^= Hex2Dec(list[i]);
            }
            return FrontWithZero(Dec2Hex(result), 2);
        }


        public static string CalcCrcCode(string str)
        {
            List<string> list = new List<string>();
            for (int i = 0; i < str.Length; i += 2)
            {
                list.Add(str.Substring(i, 2));
            }

            int result = 0;
            for (int i = 0; i < list.Count(); i++)
            {
                result ^= Hex2Dec(list[i]);
            }
            return str + FrontWithZero(Dec2Hex(result), 2);
        }


        public static string CalcCrcCodeSkip(string str, int skip)
        {
            List<string> list = new List<string>();
            for (int i = 0; i < str.Length; i += 2)
            {
                list.Add(str.Substring(i, 2));
            }

            int result = 0;
            for (int i = skip; i < list.Count; i++)
            {
                result ^= Hex2Dec(list[i]);
            }
            return FrontWithZero(Dec2Hex(result), 2);
        }


        /// <summary>
        /// 只生成CRC16的校验码
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string CalcCrc16Code2(string str)
        {
            int value = crc16(HexUtil.hexToBytes(str));

            return FrontWithZero(Utils.tenToHex(value), 4);
        }

        public static string CalcCrc16CodeSkip(string str, int skip)
        {
            return CalcCrc16Code2(str.Substring(skip * 2));
        }


        /// <summary>
        /// 返回完整长度
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string CalcCrc16Code(string str)
        {
            int value = crc16(HexUtil.hexToBytes(str));

            return str + FrontWithZero(Utils.tenToHex(value), 4);
        }


        private static int crc16(byte[] bs)
        {
            return crc16(bs, 0, bs.Length, 0xFFFF);
        }

        private static int crc16(byte[] bs, int offset, int len, int initCRC)
        {
            byte temp;
            int index = offset;
            while (len-- > 0)
            {
                temp = (byte) (initCRC & 0xFF);
                initCRC = (initCRC >> 8) ^ crc_t_4[(temp ^ bs[index++]) & 0xFF];
            }
            return initCRC;
        }


        public static readonly int[] crc_t_4 = new int[]
        {
            0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
            0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
            0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
            0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
            0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
            0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
            0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
            0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
            0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
            0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
            0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
            0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
            0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
            0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
            0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
            0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
            0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
            0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
            0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
            0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
            0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
            0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
            0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
            0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
            0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
            0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
            0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
            0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
            0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
            0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
            0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
            0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040
        };
    }
}