using Aging.Infrastructure.Drivers;
using log4net;
using Plugin.DeviceDebug.Entity;
using System;
using System.Collections.ObjectModel;
using System.Globalization;
using System.Linq;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Threading;

namespace Plugin.DeviceDebug.Panels
{
    /// <summary>
    /// CAN 帧显示模型
    /// </summary>
    public class CanFrameDisplay
    {
        public DateTime Timestamp { get; set; }
        public string FrameId { get; set; } = string.Empty;
        public int Dlc { get; set; }
        public string Data { get; set; } = string.Empty;
        public string Direction { get; set; } = string.Empty; // TX / RX
        public string Source { get; set; } = string.Empty;
    }

    /// <summary>
    /// 单通道 CAN 调试视图（承载连接控制/发送/接收记录/状态统计全部逻辑）。
    /// 由 <see cref="CanDebugPanel"/> 多通道壳按 Tab 托管；也可独立使用（旧单面板语义）。
    /// 驱动统一为 <see cref="CanDeviceDriver"/>，Local/Broker 差异对视图完全透明。
    /// </summary>
    public partial class CanChannelView : UserControl
    {
        private static readonly ILog log = LogManager.GetLogger(typeof(CanChannelView));

        /// <summary>是否为维护模式（控制输入可用性）</summary>
        public static readonly DependencyProperty IsMaintenanceModeProperty =
            DependencyProperty.Register(nameof(IsMaintenanceMode), typeof(bool), typeof(CanChannelView),
                new PropertyMetadata(false));

        public bool IsMaintenanceMode
        {
            get => (bool)GetValue(IsMaintenanceModeProperty);
            set => SetValue(IsMaintenanceModeProperty, value);
        }

        /// <summary>命令执行事件</summary>
        public event EventHandler<DebugCommand>? OnCommandExecute;

        /// <summary>接收帧列表</summary>
        public ObservableCollection<CanFrameDisplay> ReceivedFrames { get; } = new();

        /// <summary>
        /// CAN 驱动：优先复用 DeviceManager 已注册驱动（Broker 共享设备为代理驱动），
        /// 无则自建统一驱动（Local TCP NodeChannel 连模拟器）
        /// </summary>
        private Aging.Infrastructure.Contracts.IDeviceDriver? _driver;

        /// <summary>驱动所有权：外部注入的代理驱动归 DeviceManager，断开时不得 Dispose</summary>
        private bool _ownsDriver;

        /// <summary>外部已注册驱动（共享设备由 DeviceDebug 传入统一 CanDeviceDriver，禁止自建物理会话）</summary>
        public Aging.Infrastructure.Contracts.IDeviceDriver? ExistingDriver { get; set; }

        /// <summary>轮询定时器（代理驱动兜底补显接收帧）</summary>
        private DispatcherTimer? _pollTimer;

        private bool _isConnected;

        /// <summary>设备ID（从 DeviceDebug 传入）</summary>
        public string DeviceId
        {
            get => _deviceId;
            set
            {
                _deviceId = value;
                if (!string.IsNullOrEmpty(value))
                {
                    UpdateDeviceIdDisplay();
                }
            }
        }
        private string _deviceId = string.Empty;

        /// <summary>从设备 Endpoint 解析出的总线名称</summary>
        public string InitialBusName { get; set; }

        /// <summary>从设备 Endpoint 解析出的节点编号</summary>
        public int? InitialNodeIndex { get; set; }

        /// <summary>是否自动连接（从 DeviceDebug 打开时=true）</summary>
        public bool AutoConnectOnLoad { get; set; }

        public CanChannelView()
        {
            InitializeComponent();
            receiveList.ItemsSource = ReceivedFrames;
            InitializePollTimer();
            Loaded += CanChannelView_Loaded;
        }

        private void CanChannelView_Loaded(object sender, RoutedEventArgs e)
        {
            Loaded -= CanChannelView_Loaded;

            if (!string.IsNullOrEmpty(InitialBusName))
                busNameInput.Text = InitialBusName;
            if (InitialNodeIndex.HasValue)
                nodeIndexInput.Text = InitialNodeIndex.Value.ToString();

            if (AutoConnectOnLoad)
            {
                Dispatcher.BeginInvoke(new Action(() =>
                {
                    try { DoConnect(); }
                    catch (Exception ex) { log.Warn($"自动连接失败: {ex.Message}"); }
                }), DispatcherPriority.Background);
            }
        }

        private void UpdateDeviceIdDisplay()
        {
            if (!string.IsNullOrEmpty(_deviceId) && busNameInput != null)
                log.Info($"[CanChannelView] 关联设备: {_deviceId}");
        }

        private void InitializePollTimer()
        {
            _pollTimer = new DispatcherTimer { Interval = TimeSpan.FromMilliseconds(100) };
            _pollTimer.Tick += PollTimer_Tick;
        }

        private void PollTimer_Tick(object? sender, EventArgs e)
        {
            if (!_isConnected || _driver == null) return;
            try
            {
                // 统计每 tick 刷新；STATUS 查询同时触发 Broker 宿主捎带回推（事件链路）
                UpdateStats();
            }
            catch (Exception ex)
            {
                log.Error($"轮询更新失败: {ex.Message}");
            }
        }

        /// <summary>
        /// 兜底补显（仅当事件链路未覆盖时手动调用）：统一驱动已对 Local/Broker 均提供
        /// DriverFrameReceived 事件，面板默认只走事件显示，避免与轮询双报重复。
        /// </summary>
        private void DrainBrokerMailbox()
        {
            string resp;
            try
            {
                resp = _driver!.QueryAsync("RECV_ALL", CancellationToken.None).GetAwaiter().GetResult();
            }
            catch (Exception ex)
            {
                log.Debug($"接收兜底查询失败（不影响事件链路，下轮重试）: {ex.Message}");
                return;
            }

            if (string.IsNullOrEmpty(resp) || !resp.StartsWith("RECV_ALL:")) return;
            var head = resp.Substring("RECV_ALL:".Length);
            var split = head.IndexOf(':');
            string body = split >= 0 ? head.Substring(split + 1) : "";
            if (!int.TryParse(split >= 0 ? head.Substring(0, split) : head, out int count) || count <= 0) return;

            foreach (var entry in body.Split('|'))
            {
                var f = entry.Split(':');
                if (f.Length < 2 || string.IsNullOrEmpty(f[0])) continue;
                AddReceivedFrame(f[0], f[1], "RX", "BUS");
            }
        }

        private void ConnectBtn_Click(object sender, RoutedEventArgs e)
        {
            try { DoConnect(); }
            catch (Exception ex)
            {
                log.Error($"CAN 连接失败: {ex.Message}", ex);
                MessageBox.Show($"连接失败: {ex.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                UpdateConnectionStatus(false);
            }
        }

        private void DoConnect()
        {
            if (_isConnected) return;

            string busName = busNameInput.Text.Trim();
            if (!int.TryParse(nodeIndexInput.Text.Trim(), out int nodeIndex))
                throw new ArgumentException("节点编号格式错误");

            string deviceId = string.IsNullOrEmpty(_deviceId)
                ? $"CAN_Test_{nodeIndex}_{DateTime.Now:HHmmss}"
                : _deviceId;

            if (ExistingDriver != null)
            {
                // 共享/代理设备：复用宿主通路，不新建本地物理会话
                _driver = ExistingDriver;
                _ownsDriver = false;
                if (!_driver.IsConnected)
                    _driver.ConnectAsync(CancellationToken.None).GetAwaiter().GetResult();
                // 统一驱动对 Broker 也提供接收事件（经宿主捎带回流），与本地一致地订阅
                if (_driver is CanDeviceDriver shared)
                    shared.DriverFrameReceived += OnDriverFrameReceived;
                log.Info($"[CanChannelView] 复用已注册驱动: {deviceId} ({_driver.GetType().Name})");
            }
            else
            {
                var adapter = new CanDeviceDriver(deviceId, $"{busName}:{nodeIndex}");
                adapter.DriverFrameReceived += OnDriverFrameReceived;
                _driver = adapter;
                _ownsDriver = true;
                adapter.ConnectAsync(CancellationToken.None).GetAwaiter().GetResult();
            }
            _isConnected = true;

            // 模拟器模式下连接后自动启用维护模式（允许发送）
            IsMaintenanceMode = true;
            if (maintenanceToggleBtn != null)
            {
                maintenanceToggleBtn.IsChecked = true;
                maintenanceToggleBtn.IsEnabled = true;
            }

            UpdateConnectionStatus(true);
            _pollTimer?.Start();
            log.Info($"CAN 驱动已连接: Bus={busName}, Node={nodeIndex}, DeviceId={deviceId}");
        }

        private void OnDriverFrameReceived(object? sender, CanSimulator.CanFrame frame)
        {
            try
            {
                AddReceivedFrame(frame.FrameIdHex, frame.DataHex, "RX", frame.SourceNodeId);
                log.Debug($"[即时显示] 接收帧: {frame}");
            }
            catch (Exception ex)
            {
                log.Error($"即时显示帧失败: {ex.Message}", ex);
            }
        }

        private void DisconnectBtn_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                _pollTimer?.Stop();
                if (_driver != null)
                {
                    if (_driver is CanDeviceDriver adapter)
                        adapter.DriverFrameReceived -= OnDriverFrameReceived;
                    _driver.DisconnectAsync().GetAwaiter().GetResult();
                    if (_ownsDriver)
                        _driver.Dispose();
                }
                _driver = null;
                _ownsDriver = false;
                _isConnected = false;
                IsMaintenanceMode = false;
                UpdateConnectionStatus(false);
                log.Info("CAN 驱动已断开");
            }
            catch (Exception ex)
            {
                log.Error($"CAN 断开失败: {ex.Message}", ex);
            }
        }

        private void PromiscuousBtn_Click(object sender, RoutedEventArgs e)
        {
            if (!_isConnected || _driver == null) return;
            try
            {
                _driver.QueryAsync("PROMISCUOUS", CancellationToken.None).GetAwaiter().GetResult();
                log.Info("已设置混杂模式（接收所有帧）");
                MessageBox.Show("已设置混杂模式，将接收所有 CAN 帧", "提示", MessageBoxButton.OK, MessageBoxImage.Information);
            }
            catch (Exception ex)
            {
                log.Error($"设置混杂模式失败: {ex.Message}");
            }
        }

        private void MaintenanceToggleBtn_Click(object sender, RoutedEventArgs e)
        {
            bool isOn = maintenanceToggleBtn.IsChecked == true;
            IsMaintenanceMode = isOn;
            if (isOn)
            {
                maintenanceToggleBtn.Content = "维护模式: 开";
                maintenanceToggleBtn.Background = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#4CAF50"));
                log.Info("维护模式已开启（可发送 CAN 帧）");
            }
            else
            {
                maintenanceToggleBtn.Content = "维护模式: 关";
                maintenanceToggleBtn.Background = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#9E9E9E"));
                log.Info("维护模式已关闭（只读监控）");
            }
        }

        private void AutoResponseToggleBtn_Click(object sender, RoutedEventArgs e)
        {
            if (!_isConnected || _driver == null) return;
            try
            {
                bool isOn = autoResponseToggleBtn.IsChecked == true;
                string cmd = isOn ? "AUTO_RESPONSE:ON" : "AUTO_RESPONSE:OFF";
                _driver.QueryAsync(cmd, CancellationToken.None).GetAwaiter().GetResult();

                if (isOn)
                {
                    autoResponseToggleBtn.Content = "自动响应: 开";
                    autoResponseToggleBtn.Background = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#FF9800"));
                    log.Info("自动响应模式已开启（收到帧将自动回复）");
                }
                else
                {
                    autoResponseToggleBtn.Content = "自动响应: 关";
                    autoResponseToggleBtn.Background = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#9E9E9E"));
                    log.Info("自动响应模式已关闭");
                }
            }
            catch (Exception ex)
            {
                log.Error($"切换自动响应模式失败: {ex.Message}");
                MessageBox.Show($"切换失败: {ex.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
            }
        }

        private void UpdateConnectionStatus(bool connected)
        {
            _isConnected = connected;
            if (connected)
            {
                statusIndicator.Fill = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#4CAF50"));
                statusText.Text = "已连接";
                connectBtn.IsEnabled = false;
                disconnectBtn.IsEnabled = true;
                promiscuousBtn.IsEnabled = true;
                maintenanceToggleBtn.IsEnabled = true;
                autoResponseToggleBtn.IsEnabled = true;
                busNameInput.IsEnabled = false;
                nodeIndexInput.IsEnabled = false;
            }
            else
            {
                statusIndicator.Fill = new SolidColorBrush((Color)ColorConverter.ConvertFromString("#9E9E9E"));
                statusText.Text = "未连接";
                connectBtn.IsEnabled = true;
                disconnectBtn.IsEnabled = false;
                promiscuousBtn.IsEnabled = false;
                maintenanceToggleBtn.IsEnabled = false;
                autoResponseToggleBtn.IsEnabled = false;
                busNameInput.IsEnabled = true;
                nodeIndexInput.IsEnabled = true;
            }
        }

        private void UpdateStats()
        {
            if (_driver == null) return;
            try
            {
                var response = _driver.QueryAsync("STATUS", CancellationToken.None).GetAwaiter().GetResult();
                statsText.Text = $"TX: {GetStatValue(response, "Tx")}  RX: {GetStatValue(response, "Rx")}  Err: {GetStatValue(response, "Err")}";
            }
            catch { /* 忽略统计更新失败 */ }
        }

        private string GetStatValue(string statusStr, string key)
        {
            try
            {
                foreach (var part in statusStr.Split(','))
                {
                    var kv = part.Trim().Split('=');
                    if (kv.Length == 2 && kv[0].Trim() == key)
                        return kv[1].Trim();
                }
            }
            catch { }
            return "0";
        }

        public void AddReceivedFrame(string frameId, string data, string direction = "RX", string source = "")
        {
            try
            {
                var frame = new CanFrameDisplay
                {
                    Timestamp = DateTime.Now,
                    FrameId = frameId,
                    Dlc = data.Split(new[] { ' ', '-' }, StringSplitOptions.RemoveEmptyEntries).Length,
                    Data = data,
                    Direction = direction,
                    Source = source
                };

                // 必须用异步 BeginInvoke：推送常在驱动后台读循环线程触发，若用同步 Invoke，
                // 会与“UI 线程阻塞等待该读循环投递 RPC 响应”形成环形等待 → 开启应答器后推送骤增即冻结。
                if (Application.Current == null) return;
                Application.Current.Dispatcher.BeginInvoke(new Action(() =>
                {
                    ReceivedFrames.Insert(0, frame);
                    while (ReceivedFrames.Count > 500)
                        ReceivedFrames.RemoveAt(ReceivedFrames.Count - 1);
                }));
            }
            catch (Exception ex)
            {
                log.Error($"添加接收帧失败: {ex.Message}", ex);
            }
        }

        private void SendBtn_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                if (!IsMaintenanceMode)
                {
                    MessageBox.Show("当前为只读模式，无法发送数据", "提示", MessageBoxButton.OK, MessageBoxImage.Warning);
                    return;
                }
                if (!_isConnected || _driver == null)
                {
                    MessageBox.Show("请先连接 CAN 总线", "提示", MessageBoxButton.OK, MessageBoxImage.Warning);
                    return;
                }

                string frameIdStr = frameIdInput.Text.Trim();
                string dataStr = dataInput.Text.Trim();
                uint frameId = CanSimulator.CanFrame.ParseFrameId(frameIdStr);
                byte[] dataBytes = CanSimulator.CanFrame.ParseData(dataStr);
                if (dataBytes.Length > 8)
                {
                    MessageBox.Show("数据长度不能超过 8 字节", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                    return;
                }

                string command = $"SEND:{frameIdStr}:{dataStr}";
                var response = _driver.SendCommandAsync(command, CancellationToken.None).GetAwaiter().GetResult();
                AddReceivedFrame($"0x{frameId:X3}", BitConverter.ToString(dataBytes).Replace("-", " "), "TX", "LOCAL");
                log.Info($"发送 CAN 帧: ID=0x{frameId:X3}, Data={BitConverter.ToString(dataBytes)}, Response={response}");
            }
            catch (Exception ex)
            {
                log.Error($"发送 CAN 帧失败: {ex.Message}", ex);
                MessageBox.Show($"发送失败: {ex.Message}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
            }
        }

        /// <summary>供多通道壳在关闭标签时安全断开本通道（不弹 UI 错误）。</summary>
        public void DisconnectInternalSafe()
        {
            try
            {
                if (_isConnected) DisconnectBtn_Click(this, new RoutedEventArgs());
                _pollTimer?.Stop();
            }
            catch (Exception ex) { log.Warn($"通道安全断开异常: {ex.Message}"); }
        }

        private void ClearBtn_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                ReceivedFrames.Clear();
                log.Info("清空 CAN 接收记录");
            }
            catch (Exception ex)
            {
                log.Error($"清空接收记录失败: {ex.Message}", ex);
            }
        }
    }
}