using System;
using System.Collections.ObjectModel;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;
using Prism.Commands;
using TeamAAS.Feeder.Interfaces;
using TeamAAS.Feeder.Models;
using TeamAAS.Views;

namespace TeamAAS.ViewModels
{
    /// <summary>
    /// 供料器扩展功能（partial SettingViewModel）：
    /// 系统参数(超时)、料斗输入输出、输入触发、收发通讯日志、Feeder IP 自动搜索。
    /// 命令均采用懒加载，避免改动主构造函数。
    /// </summary>
    public partial class SettingViewModel
    {
        private const string FeederLogSource = "Feeder";

        #region 收发通讯日志(SendLog/ReceiveLog)

        /// <summary>收发报文日志（仅界面显示，不落文件）。</summary>
        public ObservableCollection<FeederCommLogEntry> CommLogs { get; }
            = new ObservableCollection<FeederCommLogEntry>();

        private const int MaxCommLogEntries = 500;

        /// <summary>订阅自 IFeeder.MessageExchanged，可能在非 UI 线程触发。</summary>
        private void OnFeederMessageExchanged(IFeeder dev, string content, bool isSend)
        {
            var entry = new FeederCommLogEntry
            {
                Time = DateTime.Now,
                IsSend = isSend,
                Content = content
            };
            var dispatcher = Application.Current?.Dispatcher;
            if (dispatcher != null && !dispatcher.CheckAccess())
                dispatcher.BeginInvoke(new Action(() => AppendCommLog(entry)));
            else
                AppendCommLog(entry);
        }

        private void AppendCommLog(FeederCommLogEntry entry)
        {
            CommLogs.Add(entry);
            while (CommLogs.Count > MaxCommLogEntries)
                CommLogs.RemoveAt(0);
        }

        private DelegateCommand _clearCommLogCommand;
        public DelegateCommand ClearCommLogCommand =>
            _clearCommLogCommand ?? (_clearCommLogCommand = new DelegateCommand(() => CommLogs.Clear()));

        #endregion

        #region 系统参数(超时/背光)

        private FeederSystemParam _systemParam = new FeederSystemParam();
        public FeederSystemParam SystemParam
        {
            get { return _systemParam; }
            set { SetProperty(ref _systemParam, value); }
        }

        private DelegateCommand _readSystemParamCommand;
        public DelegateCommand ReadSystemParamCommand =>
            _readSystemParamCommand ?? (_readSystemParamCommand = new DelegateCommand(async () => await ReadSystemParamAsync()));

        private DelegateCommand _writeSystemParamCommand;
        public DelegateCommand WriteSystemParamCommand =>
            _writeSystemParamCommand ?? (_writeSystemParamCommand = new DelegateCommand(async () => await WriteSystemParamAsync()));

        private async Task ReadSystemParamAsync()
        {
            if (!EnsureFeederConnected()) return;
            try
            {
                FeederStatusText = "读取系统参数...";
                var p = await _activeDevice.GetSystemParamAsync();
                SystemParam = p;
                FeederStatusText = "系统参数已读取";
                AppLogger.Info($"读取系统参数: 背光超时={p.LightTimeout} 亮度={p.LightBrightness} 闪烁={p.LightFlashTime} 平台振动超时={p.PlatShakeTimeout} 料斗振动超时={p.HopperShakeTimeout}", FeederLogSource);
            }
            catch (Exception ex)
            {
                FeederStatusText = "读取系统参数失败";
                AppLogger.Error("读取供料器系统参数失败", ex, FeederLogSource);
                DialogHelper.ShowError("读取系统参数失败", ex);
            }
        }

        private async Task WriteSystemParamAsync()
        {
            if (!EnsureFeederConnected()) return;
            try
            {
                FeederStatusText = "写入系统参数...";
                var p = SystemParam;
                await _activeDevice.SetSystemParamAsync(p);
                FeederStatusText = "系统参数已写入并保存";
                AppLogger.Info($"写入系统参数: 背光超时={p.LightTimeout} 亮度={p.LightBrightness} 闪烁={p.LightFlashTime} 平台振动超时={p.PlatShakeTimeout} 料斗振动超时={p.HopperShakeTimeout}", FeederLogSource);
                DialogHelper.Success("系统参数已写入设备");
            }
            catch (Exception ex)
            {
                FeederStatusText = "写入系统参数失败";
                AppLogger.Error("写入供料器系统参数失败", ex, FeederLogSource);
                DialogHelper.ShowError("写入系统参数失败", ex);
            }
        }

        #endregion

        #region 料斗输入输出

        /// <summary>料斗输出参数组序号(0~25)。</summary>
        public int[] HopperGroupList { get; } = Enumerable.Range(0, 26).ToArray();

        private int _selectedHopperGroup;
        public int SelectedHopperGroup
        {
            get { return _selectedHopperGroup; }
            set { SetProperty(ref _selectedHopperGroup, value); }
        }

        private HopperOutputParam _hopperParam = new HopperOutputParam();
        public HopperOutputParam HopperParam
        {
            get { return _hopperParam; }
            set { SetProperty(ref _hopperParam, value); }
        }

        private DelegateCommand _readHopperParamCommand;
        public DelegateCommand ReadHopperParamCommand =>
            _readHopperParamCommand ?? (_readHopperParamCommand = new DelegateCommand(async () => await ReadHopperParamAsync()));

        private DelegateCommand _writeHopperParamCommand;
        public DelegateCommand WriteHopperParamCommand =>
            _writeHopperParamCommand ?? (_writeHopperParamCommand = new DelegateCommand(async () => await WriteHopperParamAsync()));

        private DelegateCommand _runHopperOutputCommand;
        public DelegateCommand RunHopperOutputCommand =>
            _runHopperOutputCommand ?? (_runHopperOutputCommand = new DelegateCommand(async () => await RunHopperOutputAsync()));

        private DelegateCommand _stopHopperOutputCommand;
        public DelegateCommand StopHopperOutputCommand =>
            _stopHopperOutputCommand ?? (_stopHopperOutputCommand = new DelegateCommand(async () => await StopHopperOutputAsync()));

        private async Task ReadHopperParamAsync()
        {
            if (!EnsureFeederConnected()) return;
            try
            {
                FeederStatusText = $"读取料斗输出参数(组 {SelectedHopperGroup})...";
                HopperParam = await _activeDevice.GetHopperParamAsync(SelectedHopperGroup);
                FeederStatusText = "料斗输出参数已读取";
                AppLogger.Info($"读取料斗输出参数 组={SelectedHopperGroup}", FeederLogSource);
            }
            catch (Exception ex)
            {
                FeederStatusText = "读取料斗参数失败";
                AppLogger.Error("读取料斗输出参数失败", ex, FeederLogSource);
                DialogHelper.ShowError("读取料斗参数失败", ex);
            }
        }

        private async Task WriteHopperParamAsync()
        {
            if (!EnsureFeederConnected()) return;
            try
            {
                FeederStatusText = $"下载料斗输出参数(组 {SelectedHopperGroup})...";
                await _activeDevice.SetHopperParamAsync(SelectedHopperGroup, HopperParam);
                FeederStatusText = "料斗输出参数已下载";
                AppLogger.Info($"下载料斗输出参数 组={SelectedHopperGroup} 数字1={HopperParam.HopperDigitalOutput1} 模拟1={HopperParam.HopperAnalogOutput1} 数字2={HopperParam.HopperDigitalOutput2} 模拟2={HopperParam.HopperAnalogOutput2} 持续={HopperParam.HopperDuration}ms", FeederLogSource);
                DialogHelper.Success("料斗输出参数已下载到设备");
            }
            catch (Exception ex)
            {
                FeederStatusText = "下载料斗参数失败";
                AppLogger.Error("下载料斗输出参数失败", ex, FeederLogSource);
                DialogHelper.ShowError("下载料斗参数失败", ex);
            }
        }

        private async Task RunHopperOutputAsync()
        {
            if (!EnsureFeederConnected()) return;
            try
            {
                int id = SelectedHopperGroup + 1;
                FeederStatusText = $"执行料斗动作 {id}...";
                await _activeDevice.RunHopperOutputAsync(id, HopperParam.HopperDuration > 0 ? HopperParam.HopperDuration : (int?)null);
                FeederStatusText = $"料斗动作 {id} 执行完成";
                AppLogger.Info($"执行料斗动作 id={id} 持续={HopperParam.HopperDuration}ms", FeederLogSource);
            }
            catch (Exception ex)
            {
                FeederStatusText = "料斗动作执行失败";
                AppLogger.Error("执行料斗动作失败", ex, FeederLogSource);
                DialogHelper.ShowError("料斗动作执行失败", ex);
            }
        }

        private async Task StopHopperOutputAsync()
        {
            if (_activeDevice == null) return;
            try
            {
                await _activeDevice.StopHopperOutputAsync();
                FeederStatusText = "料斗振动已停止";
                AppLogger.Info("停止料斗振动", FeederLogSource);
            }
            catch (Exception ex)
            {
                AppLogger.Error("停止料斗振动失败", ex, FeederLogSource);
                DialogHelper.ShowError("停止料斗振动失败", ex);
            }
        }

        #endregion

        #region 输入触发序列ID

        private int _inputTrigger1;
        public int InputTrigger1
        {
            get { return _inputTrigger1; }
            set { SetProperty(ref _inputTrigger1, value); }
        }

        private int _inputTrigger2;
        public int InputTrigger2
        {
            get { return _inputTrigger2; }
            set { SetProperty(ref _inputTrigger2, value); }
        }

        private DelegateCommand _readInputTriggerCommand;
        public DelegateCommand ReadInputTriggerCommand =>
            _readInputTriggerCommand ?? (_readInputTriggerCommand = new DelegateCommand(async () => await ReadInputTriggerAsync()));

        private DelegateCommand _writeInputTriggerCommand;
        public DelegateCommand WriteInputTriggerCommand =>
            _writeInputTriggerCommand ?? (_writeInputTriggerCommand = new DelegateCommand(async () => await WriteInputTriggerAsync()));

        private async Task ReadInputTriggerAsync()
        {
            if (!EnsureFeederConnected()) return;
            try
            {
                InputTrigger1 = await _activeDevice.GetInputTriggerAsync(0);
                InputTrigger2 = await _activeDevice.GetInputTriggerAsync(1);
                FeederStatusText = $"输入触发已读取: 输入1={InputTrigger1} 输入2={InputTrigger2}";
                AppLogger.Info($"读取输入触发序列ID: 输入1={InputTrigger1} 输入2={InputTrigger2}", FeederLogSource);
            }
            catch (Exception ex)
            {
                FeederStatusText = "读取输入触发失败";
                AppLogger.Error("读取输入触发序列ID失败", ex, FeederLogSource);
                DialogHelper.ShowError("读取输入触发失败", ex);
            }
        }

        private async Task WriteInputTriggerAsync()
        {
            if (!EnsureFeederConnected()) return;
            try
            {
                await _activeDevice.SetInputTriggerAsync(0, InputTrigger1);
                await _activeDevice.SetInputTriggerAsync(1, InputTrigger2);
                FeederStatusText = "输入触发已写入";
                AppLogger.Info($"写入输入触发序列ID: 输入1={InputTrigger1} 输入2={InputTrigger2}", FeederLogSource);
                DialogHelper.Success("输入触发参数已写入设备");
            }
            catch (Exception ex)
            {
                FeederStatusText = "写入输入触发失败";
                AppLogger.Error("写入输入触发序列ID失败", ex, FeederLogSource);
                DialogHelper.ShowError("写入输入触发失败", ex);
            }
        }

        #endregion

        #region Feeder IP 自动搜索

        private DelegateCommand _searchFeederIpCommand;
        public DelegateCommand SearchFeederIpCommand =>
            _searchFeederIpCommand ?? (_searchFeederIpCommand = new DelegateCommand(OpenFeederSearchDialog));

        private void OpenFeederSearchDialog()
        {
            if (SelectedFeeder == null)
            {
                DialogHelper.Warning("请先选择或添加一个供料器");
                return;
            }

            var dialog = new SearchFeederWindow { Owner = Application.Current.MainWindow };
            if (dialog.ShowDialog() == true && dialog.SelectedResult != null)
            {
                var r = dialog.SelectedResult;
                SelectedFeeder.IP = r.IP;
                SelectedFeeder.Port = r.Port;
                FeederStatusText = $"已回填 {r.IP}:{r.Port}";
                AppLogger.Info($"搜索回填 Feeder IP: {r.FeederType} {r.IP}:{r.Port} MAC={r.MAC}", FeederLogSource);
            }
        }

        #endregion

        /// <summary>确保已连接供料器；未连接则提示并返回 false。</summary>
        private bool EnsureFeederConnected()
        {
            if (_activeDevice == null || !_activeDevice.IsConnected)
            {
                DialogHelper.Warning("请先连接供料器");
                return false;
            }
            return true;
        }
    }

    /// <summary>供料器收发报文日志条目（界面 SendLog/ReceiveLog 显示用）。</summary>
    public class FeederCommLogEntry
    {
        public DateTime Time { get; set; }
        public bool IsSend { get; set; }
        public string Content { get; set; }

        public string Direction => IsSend ? "TX →" : "RX ←";
        public string TimeText => Time.ToString("HH:mm:ss.fff");
        public string Display => $"{TimeText}  {Direction}  {Content}";
    }
}