using DeviceCommand.Device;
using Prism.Commands;
using Prism.Ioc;
using System;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Input;
using UIShare.GlobalVariable;
using UIShare.ViewModelBase;

namespace DeviceEditModule.ViewModels
{
    /// <summary>
    /// PW8001 功率分析仪 控制面板 ViewModel
    /// </summary>
    public class PW8001ViewModel : NavigateViewModelBase, IDisposable
    {
        private readonly DeviceManager _dm;
        private PW8001? _dev;
        private CancellationTokenSource? _cts;

        private string _deviceName = "PW8001";
        public string DeviceName { get => _deviceName; set => SetProperty(ref _deviceName, value); }
        private bool _isConnected;
        public bool IsConnected { get => _isConnected; set => SetProperty(ref _isConnected, value); }
        private bool _isBusy;
        public bool IsBusy { get => _isBusy; set => SetProperty(ref _isBusy, value); }

        #region 输入参数
        private int _channel = 1; public int Channel { get => _channel; set => SetProperty(ref _channel, value); }
        #endregion

        #region 测量结果
        private double _measuredVoltage;
        public double MeasuredVoltage { get => _measuredVoltage; set => SetProperty(ref _measuredVoltage, value); }
        private double _measuredCurrent;
        public double MeasuredCurrent { get => _measuredCurrent; set => SetProperty(ref _measuredCurrent, value); }
        private double _measuredPower;
        public double MeasuredPower { get => _measuredPower; set => SetProperty(ref _measuredPower, value); }
        private double _voltageTHD;
        public double VoltageTHD { get => _voltageTHD; set => SetProperty(ref _voltageTHD, value); }
        private double _currentTHD;
        public double CurrentTHD { get => _currentTHD; set => SetProperty(ref _currentTHD, value); }
        private double _totalPower;
        public double TotalPower { get => _totalPower; set => SetProperty(ref _totalPower, value); }
        private string _responseLog = "";
        public string ResponseLog { get => _responseLog; set => SetProperty(ref _responseLog, value); }
        #endregion

        #region 命令
        public ICommand QueryIdn { get; } public ICommand Reset { get; } public ICommand Clear { get; }
        public ICommand ModeWIDE { get; } public ICommand ModeIEC { get; }
        public ICommand QV { get; } public ICommand QI { get; } public ICommand QP { get; }
        public ICommand QP123 { get; } public ICommand QTHD { get; }
        #endregion

        public PW8001ViewModel(IContainerProvider cp) : base(cp)
        {
            _dm = cp.Resolve<DeviceManager>();
            QueryIdn = new DelegateCommand(async () => await Exec(async () => Log("IDN:" + await _dev!.查询机器信息(Ct()))));
            Reset = new DelegateCommand(async () => await Exec(async () => { await _dev!.复位仪器(Ct()); Log("仪器已复位"); }));
            Clear = new DelegateCommand(async () => await Exec(async () => { await _dev!.清除状态(Ct()); Log("状态已清除"); }));
            ModeWIDE = new DelegateCommand(async () => await Exec(async () => { await _dev!.设置测试模式_WIDE(Ct()); Log("WIDE模式"); }));
            ModeIEC = new DelegateCommand(async () => await Exec(async () => { await _dev!.设置测试模式_IEC(Ct()); Log("IEC模式"); }));
            QV = new DelegateCommand(async () => await Exec(async () => { MeasuredVoltage = await _dev!.查询电压_不含变比(Channel, Ct()); Log($"CH{Channel}电压={MeasuredVoltage}V"); }));
            QI = new DelegateCommand(async () => await Exec(async () => { MeasuredCurrent = await _dev!.查询电流_不含变比(Channel, Ct()); Log($"CH{Channel}电流={MeasuredCurrent}A"); }));
            QP = new DelegateCommand(async () => await Exec(async () => { MeasuredPower = await _dev!.查询功率_不含变比(Channel, Ct()); Log($"CH{Channel}功率={MeasuredPower}W"); }));
            QP123 = new DelegateCommand(async () => await Exec(async () => { TotalPower = await _dev!.查询总功率P123(Ct()); Log($"三相总功率={TotalPower}W"); }));
            QTHD = new DelegateCommand(async () => await Exec(async () =>
            {
                VoltageTHD = await _dev!.查询电压THD(Channel, Ct());
                CurrentTHD = await _dev!.查询电流THD(Channel, Ct());
                Log($"CH{Channel} THD→U:{VoltageTHD}% I:{CurrentTHD}%");
            }));
            Initialize();
        }

        #region 初始化 / Navigation

        public void Initialize(string? deviceName = null)
        {
            PW8001? found = null; string? fn = null;
            if (deviceName != null && _dm.DeviceMap.TryGetValue(deviceName, out var d) && d is PW8001 e)
            { found = e; fn = deviceName; }
            else
            {
                foreach (var kv in _dm.DeviceMap)
                    if (kv.Value is PW8001 it) { found = it; fn = kv.Key; break; }
            }
            _dev = found;
            DeviceName = fn ?? "PW8001 (未找到)";
            IsConnected = _dev?.IsConnected ?? false;
            Log(found != null
                ? $"已关联设备 [{DeviceName}]，连接:{(IsConnected ? "已连接" : "未连接")}"
                : "未在 DeviceManager 中找到 PW8001 设备");
        }

        public override void OnNavigatedTo(NavigationContext context)
        {
            var pName = context.Parameters.GetValue<string?>("DeviceName");
            Initialize(pName);
        }

        #endregion

        #region 辅助

        private CancellationToken Ct() => (_cts = new CancellationTokenSource(TimeSpan.FromSeconds(10))).Token;

        private async Task Exec(Func<Task> action)
        {
            if (_dev == null) { Log("错误：未关联到设备实例，请检查设备配置。"); return; }
            if (IsBusy) return;
            IsBusy = true;
            try
            {
                await action();
                IsConnected = _dev.IsConnected;
            }
            catch (OperationCanceledException) { Log("命令超时或已取消。"); }
            catch (Exception ex) { Log($"错误：{ex.Message}"); }
            finally { IsBusy = false; }
        }

        private void Log(string message)
        {
            var line = $"[{DateTime.Now:HH:mm:ss}] {message}";
            ResponseLog = ResponseLog.Length > 4000
                ? line + "\n" + ResponseLog[..3000]
                : line + "\n" + ResponseLog;
        }

        #endregion

        public void Dispose()
        {
            _cts?.Cancel();
            _cts?.Dispose();
        }
    }
}