using Microsoft.Extensions.Logging;
using SlnMesnac.Config;
using System;
using System.IO.Ports;
using System.Text;
using System.Threading;

namespace SlnMesnac.Common
{
    /// <summary>
    /// 光源控制类
    /// </summary>
    public sealed class LightHelper
    {
        public delegate void RefreshMessage(string message, bool isWarning = false);
        public static event RefreshMessage? RefreshMessageEvent;


        #region 单例实现
        private static readonly LightHelper lazy = new LightHelper();
        public static LightHelper Instance
        {
            get
            {
                return lazy;
            }
        }
        #endregion

        private ILogger<LightHelper> logger;


        #region 变量定义
        private static SerialPort serialPort = new SerialPort();

        #endregion 

        private DebugConfig config = DebugConfig.Instance;

        //初始化串口并启动接收数据
        public  void InstanceSerialPort()
        {
            try
            {
                SendData("CLOSE");
                serialPort.PortName = config.LightPort;// portName;
                                          
                serialPort.BaudRate = int.Parse(config.LightBaudRate);
                //奇偶校验
                serialPort.Parity = Parity.None;
                //停止位
                serialPort.StopBits = StopBits.One;
                //数据位
                serialPort.DataBits = 0x8;
                //忽略null字节
                serialPort.DiscardNull = true;

                //接收事件
                serialPort.DataReceived += new System.IO.Ports.SerialDataReceivedEventHandler(serialPort1_DataReceived);

                //开启串口
                serialPort.Open();
               
               
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message.ToString());
            }
        }

     

        /// <summary>
        /// 接收数据
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private  void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
        {
    
            string result = "";
            int bytesToRead = serialPort.BytesToRead;
            byte[] buf = new byte[bytesToRead];
            serialPort.Read(buf, 0x0, bytesToRead);
           
            for (int i = 0x0; i < buf.Length; i++)
            {
                int num = (int)buf[i];
                result =result+num.ToString("X2");
            }
            Console.WriteLine(result);
        }

        /// <summary>
        /// 发送数据方法
        ///OPEN：打开灯光,CLOSE：关闭灯光
        /// </summary>
        /// <param name="data"></param>
        public  void SendData(string data)
        {
            try
            {
                if (serialPort.IsOpen)
                {
                   
                    if (data == "OPEN")
                    {
                        // 第1通道亮度200
                        serialPort.Write(CalculateChecksum("$31"));
                        Thread.Sleep(30);
                        // 第2通道亮度200
                        serialPort.Write(CalculateChecksum("$32"));
                    }
                    else if (data == "CLOSE")
                    {
                        // 第1通道亮度0
                        serialPort.Write("$3100016");
                        Thread.Sleep(30);
                        // 第2通道亮度0
                        serialPort.Write("$3200015");
                    }    
                }
                else
                {
                    logger.LogError("灯光串口未打开，请先初始化串口并打开连接。");
                }
            }
            catch (Exception ex)
            {
                logger.LogError($"灯光发送数据时发生错误：{ex.Message}");
                RefreshMessageEvent?.Invoke("相机灯光控制失败，检查灯光参数",true);
            }

        }


        /// <summary>
        /// 校验位计算，返回指令,input==$31\32
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public string CalculateChecksum(string input)
        {
            if (input == "$31")
            {
                input = input + StringToHex(config.Ch1);
            }
            else
            {
                input = input + StringToHex(config.Ch2);
            }
            // Step 1: Convert each character to ASCII binary representation
            StringBuilder binaryBuilder = new StringBuilder();
            foreach (char c in input)
            {
                // Convert character to ASCII binary
                string asciiBinary = Convert.ToString(c, 2).PadLeft(8, '0');
                binaryBuilder.Append(asciiBinary);
            }

            string binaryString = binaryBuilder.ToString();

            // Step 2: Apply XOR operation consecutively
            int result = 0;
            for (int i = 0; i < binaryString.Length; i += 8)
            {
                // Take 8 bits (1 byte) at a time
                string segment = binaryString.Substring(i, 8);
                int segmentInt = Convert.ToInt32(segment, 2);
                result ^= segmentInt;
            }

            // Step 3: Convert the final result to hexadecimal
            string checksumHex = result.ToString("X");

            // Ensure checksumHex is 2 characters long (pad with 0 if necessary)
            checksumHex = checksumHex.PadLeft(2, '0');

            return input+checksumHex;
        }

        /// <summary>
        /// 将字符串转换为十六进制字符串
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public  string StringToHex(string input)
        {
            try
            {
                int num = int.Parse(input);
                return num.ToString("X3");
            }
            catch (Exception ex)
            {
                RefreshMessageEvent?.Invoke("检查亮度参数是否合理:0-255", true);
                return null;
            }
        
        }

    }
}