using Modbus.Device;
using Prism.Commands;
using Prism.Mvvm;
using System;
using System.Collections.Generic;
using System.IO.Ports;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace ModbusDemo.VIewModel
{
    public class AttachUCViewModel : BindableBase
    {

        private SerialPort _serialPort;
        public DelegateCommand ReadOddRegisterCmm { get; set; }
        //读取的结果
        private string _readResult;

        public string ReadResult
        {
            get { return _readResult; }
            set
            {
                _readResult = value;
                RaisePropertyChanged();
            }
        }
        //显示操作的时间
        private int _time;

        public int Time
        {
            get { return _time; }
            set
            {
                _time = value;
                RaisePropertyChanged();
            }
        }


        public AttachUCViewModel()
        {

        }
        public AttachUCViewModel(SerialPort serialPort)
        {
            ReadOddRegisterCmm = new DelegateCommand(ReadOddRegister);
            _serialPort = serialPort;
        }

        private void ReadOddRegister()
        {
            // 创建 Modbus RTU 主站

            IModbusSerialMaster master = ModbusSerialMaster.CreateRtu(_serialPort);
            byte slaveId = 1;
            ushort totalRegisters = 1000;
            ushort chunkSize = 100;
            int numChunks = (int)Math.Ceiling((double)totalRegisters / chunkSize);

            ushort[] allRegisters = new ushort[totalRegisters];
            Task[] tasks = new Task[numChunks];
            DateTime startTime = DateTime.Now;
            for (int i = 0; i < numChunks; i++)
            {
                ushort startAddress = (ushort)(10300 + i * chunkSize);
                ushort currentChunkSize = 100;

                int chunkIndex = i;
                tasks[i] = Task.Run(() =>
                {
                    try
                    {
                        ushort[] registers = master.ReadHoldingRegisters(slaveId, startAddress, currentChunkSize);
                        Array.Copy(registers, 0, allRegisters, chunkIndex * chunkSize, currentChunkSize);
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine($"线程 {chunkIndex} 读取寄存器时出错: {ex.Message}");
                    }
                });
            }

            // 等待所有任务完成
            Task.WaitAll(tasks);
            Time = (int)(DateTime.Now - startTime).TotalMilliseconds;
            StringBuilder result = new StringBuilder();
            int count = 0;
            for (int i = 1; i < totalRegisters; i += 2)
            {
                result.Append(allRegisters[i].ToString()+" ");
                count++;
                if (count % 50 == 0)
                {
                    result.AppendLine();
                }
            }
            ReadResult = result.ToString();

        }
    }

}