using Common.Attributes;
using DeviceCommand.Base;
using Logger;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DeviceCommand.Device
{
    [BOBCommand]
    public class IOBoard : ModbusTcp
    {
        public IOBoard(string Ip地址, int 端口, int 发送超时, int 接收超时)
        {
            ConfigureDevice(Ip地址, 端口, 发送超时, 接收超时);
        }
        #region 心跳
        private CancellationTokenSource _cancellationTokenSource;
        private Task? _heartbeatTask;
        private const int HeartbeatInterval = 3000;
        public bool IsActive = false;
        public int ReConnectionAttempts = 0;
        public const int MaxReconnectAttempts = 10;
        public override async Task<bool> ConnectAsync(CancellationToken ct = default)
        {
            await _commLock.WaitAsync(ct);
            try
            {
                if (TcpClient != null && !TcpClient.Connected) TcpClient = new();
                if (TcpClient.Connected)
                {
                    return true;
                }
                await TcpClient.ConnectAsync(IPAddress, Port, ct);
                IsActive = true;
                StartHeartbeat();
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }
            finally
            {
                _commLock.Release();
            }
        }
        public override void Close()
        {
            if (!TcpClient.Connected)
            {
                throw new InvalidOperationException("TCP 没有连接成功");
            }
            if (TcpClient.Connected)
            {
                TcpClient.Close();
                StopHeartbeat();
            }
        }
        // 启动设备的心跳
        public void StartHeartbeat()
        {
            if (_heartbeatTask != null)
                return;
            if (_cancellationTokenSource == null || _cancellationTokenSource.IsCancellationRequested)
                _cancellationTokenSource = new();
            _heartbeatTask = Task.Run(() => HeartbeatLoop(_cancellationTokenSource.Token));
        }

        // 停止设备的心跳
        public void StopHeartbeat()
        {
            IsActive = false;
            _cancellationTokenSource.Cancel();
            _heartbeatTask = null;
        }

        private async Task HeartbeatLoop(CancellationToken ct)
        {
            while (!ct.IsCancellationRequested)
            {
                await Task.Delay(HeartbeatInterval, ct);

                try
                {
                    await WriteSingleRegisterAsync(1, 0, 1);
                }
                catch (Exception ex)
                {
                    IsActive = false;
                    ReConnectionAttempts++;
                    if (MaxReconnectAttempts < ReConnectionAttempts)
                    {
                        StopHeartbeat();
                        return;
                    }
                    await ReconnectDevice(ct);
                }
            }
        }
        private async Task ReconnectDevice(CancellationToken ct)
        {
            try
            {
                bool resultConnect = await ConnectAsync(ct);
                if (resultConnect)
                {
                    ReConnectionAttempts = 0;
                }
            }
            catch (Exception ex)
            {

            }
        }
        #endregion


        public virtual async Task 写单一输出(byte 从站地址, ushort 起始地址, ushort 值)
        {
            await WriteSingleRegisterAsync(从站地址, 起始地址, 值);
        }

        public virtual async Task 写多输出(byte 从站地址, ushort 起始地址, ushort[] 值数组)
        {
            await WriteMultipleRegistersAsync(从站地址, 起始地址, 值数组);
        }
        public virtual async Task<ushort> 读单一输入(byte 从站地址, ushort 起始地址, CancellationToken ct = default)
        {
            var result = await ReadInputRegistersAsync(从站地址, 起始地址, 1, ct);
            return result[0]; 
        }
        public virtual async Task<ushort[]> 读多个输入(byte 从站地址, ushort 起始地址, ushort 数量, CancellationToken ct = default)
        {
            return await ReadInputRegistersAsync(从站地址, 起始地址, 数量, ct);
        }
    }
}