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

namespace LangGuan.Services
{
    public class HJ212_2017
    {
        /// <summary>
        /// 数据帧头
        /// </summary>
        public string header { get; set; }
        /// <summary>
        /// 数据长度
        /// </summary>
        public string data_length { get; set; }

        /// <summary>
        /// 数据头
        /// </summary>
        public Dictionary<string, string> DATA_HEAD { get; set; }
        /// <summary>
        /// 
        /// </summary>
        public Dictionary<string, string> CP { get; set; }
        /// <summary>
        /// CRC校验
        /// </summary>
        public string CRC { get; set; }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="Text"></param>
        /// <returns></returns>
        public bool DecodeData(string Text)
        {
            try
            {
                if (Text.Length < 12 || !Text.StartsWith("##"))
                {
                    Console.WriteLine("不是HJ212协议的报文!");
                    return false;
                }
                Console.WriteLine($"开始解码数据");
                Text = Text.ToUpper().Replace(";CP=", "").Replace(" ", "");//有些厂家协议不很标准，有的大小写不一致，此处强制转大写字母
                header = Text.Substring(0, 2);
                data_length = Text.Substring(2, 4);
                string[] data_0 = Text.Substring(6, Text.Length - 6).Split(new char[] { '&', '&' }, StringSplitOptions.RemoveEmptyEntries);
                string[] data_1 = data_0[0].Split(new char[] { ';' });
                DATA_HEAD = new Dictionary<string, string>();
                for (int h = 0; h < data_1.Length; h++)
                {
                    string[] d_1 = data_1[h].Split(new char[] { '=' });
                    DATA_HEAD.Add(d_1[0], d_1[1]);
                }
                string[] data_2 = data_0[1].Split(new char[] { ';' });
                CP = new Dictionary<string, string>();
                for (int i = 0; i < data_2.Length; i++)
                {
                    string[] d_6 = data_2[i].Split(new char[] { ',' });
                    for (int j = 0; j < d_6.Length; j++)
                    {
                        string[] d_7 = d_6[j].Split(new char[] { '=' });
                        CP.Add(d_7[0].Replace("-RTD", ""), d_7[1]);
                    }
                }
                CRC = data_0[2];
                return true;
            }
            catch (Exception ex)
            {
                //数据接收不完整
                Console.WriteLine($" 解码失败：err：{ex},数据有问题，" + Text);
                //throw;
                return false;
            }
        }


        /// <summary>
        /// 判断数据是否通过校验
        /// </summary>
        /// <param name="Text">原始数据</param>
        /// <returns>是否通过</returns>
        public bool Crc16(string Text)
        {
            try
            {
                string CRC = Text.Substring(Text.Length - 4, 4);

                Text = Text.Substring(Text.IndexOf("QN"));
                Text = Text.Substring(0, Text.Length - 4);

                byte[] bytes = Encoding.ASCII.GetBytes(Text);
                int crcRegister = 0xFFFF;
                for (int i = 0; i < bytes.Length; i++)
                {
                    crcRegister = (crcRegister >> 8) ^ bytes[i];
                    for (int j = 0; j < 8; j++)
                    {
                        int check = crcRegister & 0x0001;
                        crcRegister >>= 1;
                        if (check == 0x0001)
                        {
                            crcRegister ^= 0xA001;
                        }
                    }
                }
                string result = string.Format("{0:X}", crcRegister);//转十六进制
                for (int i = result.Length; i < 4; i++)//补足 4 位
                {
                    result = "0" + result;
                }
                //LogApi.WriteLog("计算校验码：" + result);
                if (result == CRC)
                {
                    return true;
                }
                else
                {
                    Console.WriteLine("校验码有误，" + CRC);
                    Console.WriteLine("待校验数据：" + Text);
                    Console.WriteLine("计算校验码：" + result);
                    //LogApi.WriteLog("校验码有误：" + CRC);
                    //LogApi.WriteLog("待校验数据：" + Text);
                    //LogApi.WriteLog("计算校验码：" + result);
                    return false;


                }
            }
            catch (Exception)
            {
                Console.WriteLine("数据校验：数据有问题：" + Text);
                //数据接收不完整
                return false;
                //throw;
            }

        }
    }
}