using Prism.Commands;
using Prism.Mvvm;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using TeamAAS.FlowEditor.Execution;
using TeamAAS.FlowEditor.Models;
using TeamAAS.FlowEditor.Plugins;
using TeamAAS.FlowEngine.Execution;
using TeamAAS.FlowEngine;

namespace TeamAAS.FlowEditor
{

    /// <summary>
    /// 流程编辑器 ViewModel（单流程）
    /// </summary>
    public class FlowEditorViewModel : TeamAAS.BindableBase
    {
        #region 属性
        private FlowGraph _graph;
        public FlowGraph Graph
        {
            get => _graph;
            set
            {
                if (SetProperty(ref _graph, value))
                    HookGraph(_graph);
            }
        }

        public PropertyChangedEventHandler GraphDataChanged { get; set; }

        #region 脏标记（决定"切换产品时是否提示保存"）

        private bool _isDirty;
        /// <summary>流程是否被修改过（点击保存或加载后恢复为 false）</summary>
        public bool IsDirty
        {
            get => _isDirty;
            private set => SetProperty(ref _isDirty, value);
        }

        /// <summary>标记流程已修改（节点增删/移动/连线/属性编辑等）</summary>
        public void MarkDirty()
        {
            IsDirty = true;
        }

        /// <summary>标记流程已保存/刚加载（清除修改标记）</summary>
        public void MarkClean()
        {
            IsDirty = false;
        }

        private bool _dirtyTrackingHooked;

        private void HookGraph(FlowGraph graph)
        {
            if (graph == null) return;
            if (_dirtyTrackingHooked)
            {
                graph.Nodes.CollectionChanged -= OnNodesCollectionChanged;
                graph.Connections.CollectionChanged -= OnConnectionsCollectionChanged;
                foreach (var node in graph.Nodes)
                    node.PropertyChanged -= OnNodePropertyChanged;
            }

            graph.Nodes.CollectionChanged += OnNodesCollectionChanged;
            graph.Connections.CollectionChanged += OnConnectionsCollectionChanged;
            foreach (var node in graph.Nodes)
                node.PropertyChanged += OnNodePropertyChanged;
            _dirtyTrackingHooked = true;
        }

        private void OnNodesCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
        {
            if (e.OldItems != null)
                foreach (FlowNode node in e.OldItems)
                    node.PropertyChanged -= OnNodePropertyChanged;
            if (e.NewItems != null)
                foreach (FlowNode node in e.NewItems)
                    node.PropertyChanged += OnNodePropertyChanged;

            MarkDirty();
        }

        private void OnConnectionsCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
        {
            MarkDirty();
        }

        // 只有"用户编辑类"属性才计入脏标记；运行状态（Status/CostTime/结果等）不算
        private static readonly HashSet<string> EditProperties = new HashSet<string>
        {
            nameof(FlowNode.X),
            nameof(FlowNode.Y),
            nameof(FlowNode.NodeName),
            nameof(FlowNode.IsEnabled),
            nameof(FlowNode.IsSkipWarning),
            nameof(FlowNode.NodeWidth),
            nameof(FlowNode.NodeHeight),
        };

        private void OnNodePropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            if (EditProperties.Contains(e.PropertyName))
                MarkDirty();
        }

        #endregion

        private bool _isSubFlowEditor;
        /// <summary>
        /// 是否为子流程编辑器
        /// </summary>
        public bool IsSubFlowEditor
        {
            get => _isSubFlowEditor;
            set
            {
                if (SetProperty(ref _isSubFlowEditor, value))
                {
                    RunFlowCommand?.RaiseCanExecuteChanged();
                }
            }
        }

        public ObservableCollection<ToolboxGroup> ToolboxGroups { get; private set; }

        private FlowNode _selectedNode;
        public FlowNode SelectedNode
        {
            get => _selectedNode;
            set
            {
                if (SetProperty(ref _selectedNode, value))
                {
                    // 切换节点时，自动选中最新历史记录（倒序，最新在 index 0）
                    if (_selectedNode != null && _selectedNode.ExecutionHistory?.Count > 0)
                        _selectedNode.SelectedHistoryEntry = _selectedNode.ExecutionHistory[0];
                }
            }
        }

        private double _zoom = 1.0;
        public double Zoom
        {
            get => _zoom;
            set => SetProperty(ref _zoom, value);
        }

        private bool _isRunning;
        public bool IsRunning
        {
            get => _isRunning;
            set => SetProperty(ref _isRunning, value);
        }

        private bool _isReadOnly;
        /// <summary>
        /// 只读监控模式（运行产品运行中）：可选中节点查看结果，禁止一切修改与编辑器内运行。
        /// </summary>
        public bool IsReadOnly
        {
            get => _isReadOnly;
            private set => SetProperty(ref _isReadOnly, value);
        }

        /// <summary>由 Shell/产品级状态设置只读模式</summary>
        public void SetReadOnly(bool value)
        {
            IsReadOnly = value;
            RunFlowCommand?.RaiseCanExecuteChanged();
            StopFlowCommand?.RaiseCanExecuteChanged();
        }

        private bool _isLoading;
        /// <summary>导入流程时是否正在加载（画布显示转圈动画）</summary>
        public bool IsLoading
        {
            get => _isLoading;
            set => SetProperty(ref _isLoading, value);
        }

        private double _canvasWidth = 3500;
        /// <summary>画布宽度</summary>
        public double CanvasWidth
        {
            get => _canvasWidth;
            set => SetProperty(ref _canvasWidth, value);
        }

        private double _canvasHeight = 3500;
        /// <summary>画布高度</summary>
        public double CanvasHeight
        {
            get => _canvasHeight;
            set => SetProperty(ref _canvasHeight, value);
        }
        #endregion

        #region 命令
        [field: NonSerialized]
        public DelegateCommand ClearSelectionCommand { get; private set; }
        public DelegateCommand DeleteSelectedCommand { get; private set; }
        public DelegateCommand RunFlowCommand { get; private set; }
        public DelegateCommand StopFlowCommand { get; private set; }
        public DelegateCommand ImportFlowCommand { get; private set; }
        public DelegateCommand ExportFlowCommand { get; private set; }
        #endregion

        #region 节点创建
        /// <summary>
        /// 从插件描述符创建节点
        /// </summary>
        public static FlowNode CreateNodeFromPlugin(string NodeName,FlowGraph flowGraph, NodePluginInfo info, double x, double y)
        {
            var desc = PluginLoader.Instance.GetDescriptor(info.PluginId);
            var node = new FlowNode
            {
                NodeName = NodeName,
                Category = desc?.NodeShape ?? info.Category,
                FlowName = flowGraph.GraphName,
                FlowId = flowGraph.GraphId,
                PluginId = info.PluginId,
                X = x,
                Y = y,
                IconGeometry = info.IconGeometry
            };

            // 创建插件实例并获取默认模型
            var plugin = PluginLoader.Instance.CreateInstance(info.DisplayName);
            if (plugin != null)
            {
                plugin.GetModel.NodeId = node.NodeId;
                plugin.GetModel.ToolName = info.DisplayName;
                plugin.GetModel.NodeName = node.NodeName;
                plugin.GetModel.PluginId = node.PluginId;
                plugin.GetModel.FlowName = flowGraph.GraphName;
                plugin.GetModel.FlowId = flowGraph.GraphId;
                node.Registry = flowGraph.Registry;
                plugin.Registry = flowGraph.Registry;   // InitRun 前需就绪，使默认输出注册到正确的注册表

                // 新建节点立即执行一次初始化运行：触发 DeclareOutputs 生成默认输出、注册到 ResultRegistry(供绑定树可见)、
                // 并填充 LastResults；随后 PluginModel setter 会用 LastResults 刷新节点输出列表。
                // 修复：从工具箱新拖入的节点不显示输出(此前仅 InitializeNode 加载/粘贴路径才 InitRun)。
                plugin.InitRun();

                node.PluginModel = plugin;
                
            }
            return node;
        }
        #endregion

        #region 构造函数
        public FlowEditorViewModel(FlowGraph graph = null, bool isSubFlowEditor = false, FlowToolboxScope toolboxScope = FlowToolboxScope.Main)
        {
            Graph = graph ?? new FlowGraph { GraphName = "流程" };
            IsSubFlowEditor = isSubFlowEditor;
            ToolboxScope = toolboxScope;

            InitCommands();
            MarkClean();
        }

        /// <summary>
        /// 工具箱作用域：决定本编辑器工具箱展示哪一批插件、按什么分组。
        /// Main=主流程（排除 IsSubFlowNode 子节点，按 PluginCategory 分组）；
        /// Halcon=Halcon 子流程（只显 IsSubFlowNode 子节点，按 VisionPlugin 分组）。
        /// </summary>
        public FlowToolboxScope ToolboxScope { get; private set; } = FlowToolboxScope.Main;

        private void InitCommands()
        {
            // 从 PluginLoader 构建工具箱（按作用域过滤/分组）
            ToolboxGroups = new ObservableCollection<ToolboxGroup>();
            var infos = PluginLoader.Instance.GetAllPluginInfos();
            if (ToolboxScope != FlowToolboxScope.Main)
            {
                // 平台子流程编辑器（Halcon/Vpp/Vm）：只取标记为子流程节点的插件，并按平台
                // （PluginCategory: Halocn模块/Vpp模块/Vm模块）隔离 —— 各平台只见到自己的算子，
                // 平台内按 VisionPlugin 枚举分组
                PluginCategory platform;
                switch (ToolboxScope)
                {
                    case FlowToolboxScope.VisionVpp: platform = PluginCategory.Vpp模块; break;
                    case FlowToolboxScope.VisionVm: platform = PluginCategory.Vm模块; break;
                    default: platform = PluginCategory.Halocn模块; break;
                }
                var subInfos = infos.Where(i => i.IsSubFlowNode && i.Group == platform).ToList();
                foreach (var g in subInfos.GroupBy(i => i.VisionCategory).OrderBy(g => g.Key))
                {
                    ToolboxGroups.Add(new ToolboxGroup
                    {
                        GroupName = g.Key.ToString(),
                        Category = platform,
                        GroupIcon = VisionCategoryIconMap.GetIcon(g.Key),
                        Items = g.ToList()
                    });
                }
            }
            else
            {
                // 主流程：排除子流程专用节点（保持既有行为——现有插件 IsSubFlowNode 均为 false，不受影响）
                var mainInfos = infos.Where(i => !i.IsSubFlowNode).ToList();
                foreach (var g in mainInfos.GroupBy(i => i.Group))
                {
                    ToolboxGroups.Add(new ToolboxGroup
                    {
                        GroupName = g.Key.ToString(),
                        Category = g.Key,
                        GroupIcon = CategoryIconMap.GetIcon(g.Key),
                        Items = g.ToList()
                    });
                }
            }

            ClearSelectionCommand = new DelegateCommand(() => SelectedNode = null);
            DeleteSelectedCommand = new DelegateCommand(() =>
            {
                if (SelectedNode != null)
                {
                    Graph.RemoveNode(SelectedNode.NodeId);
                    SelectedNode = null;
                }
            });

            RunFlowCommand = new DelegateCommand(async () => await RunFlowAsync(), () => !IsRunning && !IsSubFlowEditor && !IsReadOnly);
            StopFlowCommand = new DelegateCommand(() => StopFlow(), () => IsRunning);

            // 导入/导出统一走命令（工具栏按钮与 Shell 右键菜单共用，避免重复代码）
            ImportFlowCommand = new DelegateCommand(async () =>
            {
                if (IsReadOnly)
                {
                    DialogHelper.Info("运行产品监控中，无法导入流程");
                    return;
                }

                var dlg = new Microsoft.Win32.OpenFileDialog
                {
                    Filter = "流程文件|*.aas|所有文件|*.*",
                    Title = "导入流程"
                };
                if (dlg.ShowDialog() == true)
                {
                    if (Graph != null && await ImportFlowAsync(Graph.GraphName, dlg.FileName) == true)
                        DialogHelper.Success("导入成功");
                    else
                        DialogHelper.Error("导入失败");
                }
            });

            ExportFlowCommand = new DelegateCommand(() =>
            {
                if (Graph == null) return;
                var dlg = new Microsoft.Win32.SaveFileDialog
                {
                    Filter = "流程文件|*.aas|所有文件|*.*",
                    Title = "导出流程",
                    FileName = Graph.GraphName + ".aas"
                };
                if (dlg.ShowDialog() == true)
                {
                    if (ExportFlow(Graph.GraphName, dlg.FileName) == true)
                        DialogHelper.Success("导出成功");
                    else
                        DialogHelper.Error("导出失败");
                }
            });
        }
        #endregion

        #region 执行
        private CancellationTokenSource _cts;
        private FlowExecutor _executor;

        public async Task RunFlowAsync()
        {
            if (IsRunning) return;

            _cts = new CancellationTokenSource();
            _executor = new FlowExecutor(Graph);

            IsRunning = true;
            RunFlowCommand.RaiseCanExecuteChanged();
            StopFlowCommand.RaiseCanExecuteChanged();

            _executor.ExecutionCompleted += (success) =>
            {
                IsRunning = false;
                RunFlowCommand.RaiseCanExecuteChanged();
                StopFlowCommand.RaiseCanExecuteChanged();
            };

            try
            {
                await _executor.ExecuteAsync(_cts.Token);
            }
            finally
            {
                // 兜底：即使 ExecutionCompleted 因 UI 线程繁忙被延迟、或执行器抛异常，
                // 也保证运行态复位，避免"执行完仍被锁住、无法再次运行"。
                IsRunning = false;
                RunFlowCommand?.RaiseCanExecuteChanged();
                StopFlowCommand?.RaiseCanExecuteChanged();
            }
        }

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

        /// <summary>
        /// 仅运行单个节点（不启动后继）
        /// </summary>
        public async Task RunSingleNodeAsync(FlowNode node)
        {
            if (IsRunning || IsReadOnly || node == null) return;

            _cts = new CancellationTokenSource();
            _executor = new FlowExecutor(Graph);

            IsRunning = true;
            RunFlowCommand?.RaiseCanExecuteChanged();
            StopFlowCommand?.RaiseCanExecuteChanged();

            _executor.ExecutionCompleted += (success) =>
            {
                IsRunning = false;
                RunFlowCommand?.RaiseCanExecuteChanged();
                StopFlowCommand?.RaiseCanExecuteChanged();
            };

            try
            {
                await _executor.ExecuteSingleNodeAsync(node, _cts.Token);
            }
            finally
            {
                IsRunning = false;
                RunFlowCommand?.RaiseCanExecuteChanged();
                StopFlowCommand?.RaiseCanExecuteChanged();
            }
        }

        /// <summary>
        /// 从指定节点开始运行（向下流转）
        /// </summary>
        public async Task RunFromNodeAsync(FlowNode node)
        {
            if (IsRunning || IsReadOnly || node == null) return;

            _cts = new CancellationTokenSource();
            _executor = new FlowExecutor(Graph);

            IsRunning = true;
            RunFlowCommand?.RaiseCanExecuteChanged();
            StopFlowCommand?.RaiseCanExecuteChanged();

            _executor.ExecutionCompleted += (success) =>
            {
                IsRunning = false;
                RunFlowCommand?.RaiseCanExecuteChanged();
                StopFlowCommand?.RaiseCanExecuteChanged();
            };

            try
            {
                await _executor.ExecuteFromNodeAsync(node, _cts.Token);
            }
            finally
            {
                IsRunning = false;
                RunFlowCommand?.RaiseCanExecuteChanged();
                StopFlowCommand?.RaiseCanExecuteChanged();
            }
        }

        /// <summary>
        /// 右键属性 - 显示节点通用属性（非插件编辑器）
        /// </summary>
        public void ShowNodeProperties(FlowNode node)
        {
            if (node == null) return;
            string oldName = node.NodeName;
            if (DialogHelper.EditProperties(node, $"节点属性 - {node.NodeName}"))
            {
                // 重命名后确保唯一性
                if (node.NodeName != oldName)
                {
                    string newName = node.NodeName;
                    int suffix = 1;
                    while (Graph.Nodes.Any(n => n != node && n.NodeName == newName))
                        newName = $"{node.NodeName}_{suffix++}";
                    if (newName != node.NodeName)
                    {
                        node.NodeName = newName;
                        DialogHelper.Info($"名称已存在，自动改为: {newName}");
                    }
                }
            }
        }
        #endregion

        #region 方法
        public void CreateNode(double x, double y, NodePluginInfo info)
        {
            string baseName = info.DisplayName;
            int suffix = 1;
            string candidate = baseName + suffix;
            while (Graph.Nodes.Any(n => n.NodeName == candidate))
            {
                suffix++;
                candidate = baseName + suffix;
            }
            var node = CreateNodeFromPlugin(candidate,Graph, info, x, y);
            // 重名加序号
            
            
            Graph.AddNode(node);
        }

        /// <summary>
        /// 双击节点 - 打开属性编辑器或插件自定义窗体
        /// </summary>
        public void OpenNodeEditor(FlowNode node)
        {
            if (node == null) return;

            // 异常分支节点：无属性可编辑，双击不弹任何窗
            if (node.Category == NodeCategory.ExceptionBranch) return;

            // 只读监控模式：禁止打开编辑器修改节点（允许选中查看结果）
            if (IsReadOnly)
            {
                DialogHelper.Info("运行产品监控中，节点处于只读状态");
                return;
            }

            var desc = PluginLoader.Instance.GetDescriptor(node.ToolName ?? node.PluginId);
            if (desc == null) return;

            var plugin = PluginLoader.Instance.CreateInstance(desc.DisplayName);
            if (plugin == null) return;

            if (node.PluginModel is IFlowNodePlugin savedModel)
                plugin.GetModel = savedModel.GetModel;
            PluginLoader.Instance.SelectFlow = node;

            if (desc.HasCustomView)
            {
                try
                {
                    var view = System.Activator.CreateInstance(desc.Attribute.ViewType) as System.Windows.FrameworkElement;
                    if (view != null)
                    {
                        view.DataContext = plugin.GetModel;

                        System.Action<object, System.Threading.CancellationToken> execAction = (obj, token) =>
                        {
                            // 承载内嵌流程画布的自定义视图（如组合模块编辑器）实现 IPluginRunFeedback：
                            // 执行前后同步其运行态，使"窗体执行"与"画布内 ▶ 运行"的反馈完全一致
                            // （执行中：运行/停止按钮切换、画布锁定编辑、子流程节点依次亮灯可见）。
                            var feedback = view as IPluginRunFeedback;
                            feedback?.BeginRun();
                            try
                            {
                                // 执行前先把视图当前编辑回写模型（如脚本编辑器），
                                // 让「窗体执行」运行编辑器所见代码，而非上次「确定」时的旧代码。
                                // execAction 在后台线程触发，编辑器控件读取必须封送回 UI 线程。
                                var pendingSave = view as IPluginViewSave;
                                if (pendingSave != null)
                                    System.Windows.Application.Current?.Dispatcher.Invoke(() => pendingSave.SaveChanges());

                                plugin.GetModel = obj as BasePluginModel;
                                var status = plugin.Run(token);
                                var costMs = plugin.CostTime;
                                System.Windows.Application.Current?.Dispatcher.Invoke(() =>
                                {
                                    // 执行完成的 CT 信息优先写入承载窗体底部提示栏（组合模块等实现
                                    // 了 IPluginViewTip 的视图），不再弹全局 Growl；无提示栏时退回 Growl。
                                    var ctText = $"执行完成: {status}, 耗时 {costMs}ms";
                                    if (view is IPluginViewTip tipView)
                                        tipView.ShowTip(ctText);
                                    else
                                        DialogHelper.Info(ctText);
                                });
                            }
                            finally
                            {
                                feedback?.EndRun();
                            }
                        };

                        // 用户点击"确定"才回写模型并标记已修改
                        bool confirmed = DialogHelper.ShowPluginView(view, desc.DisplayName, execAction);
                        if (confirmed)
                        {
                            if (view is IPluginViewSave saveable)
                                saveable.SaveChanges();
                            node.PluginModel = plugin;
                            MarkDirty();
                        }
                    }
                }
                catch (System.Exception ex)
                {
                    DialogHelper.Error($"打开插件窗体失败: {ex.Message}");
                }
            }
            else
            {
                var model = plugin.GetModel;
                System.Action<object, System.Threading.CancellationToken> execAction = (obj, token) =>
                {
                    plugin.GetModel = obj as BasePluginModel;
                    var status = plugin.Run(token);
                    System.Windows.Application.Current?.Dispatcher.Invoke(() =>
                        DialogHelper.Info($"执行完成: {status}, 耗时 {plugin.CostTime}ms"));
                };
                // 无自定义视图的插件走属性编辑器:设置公式数据源上下文(与自定义视图的
                // BtnProperties_Click 行为对齐),否则 FormulaEditor 拿不到前序节点输出候选
                // 例外:视觉平台子流程编辑器(Halcon/Vpp/Vm)内编辑子节点时,若已挂容器
                // ParentGroupModel(含 ModuleInputs),保留它以便公式树显示容器「输入」变量(&{输入.图像});
                // 主流程与组合模块(ToolboxScope=Main)行为完全不变。
                bool keepParent = ToolboxScope != FlowToolboxScope.Main
                    && PluginLoader.Instance.ParentGroupModel != null
                    && PluginLoader.Instance.ParentGroupModel.GetType().GetProperty("ModuleInputs") != null;
                if (!keepParent)
                    PluginLoader.Instance.ParentGroupModel = model;
                try
                {
                    if (DialogHelper.EditProperties(model, $"属性编辑 - {node.NodeName}", execAction))
                    {
                        node.PluginModel = plugin;
                        node.NotifyStatusChanged();
                        MarkDirty(); // 确认修改 → 标记流程已更改
                    }
                }
                finally
                {
                    if (!keepParent)
                        PluginLoader.Instance.ParentGroupModel = null;
                }
            }
        }
        #endregion

        #region 导入/导出
        /// <summary>
        /// 导出当前流程到文件(.aas，二进制格式)
        /// </summary>
        public bool ExportFlow(string FlowName, string filePath)
        {
            return FlowFileStore.Save(Graph, filePath);
        }

        /// <summary>
        /// 从文件(.aas)导入流程（异步：后台反序列化 + 画布加载动画）
        /// </summary>
        public async System.Threading.Tasks.Task<bool> ImportFlowAsync(string FlowName, string filePath)
        {
            IsLoading = true;
            try
            {
                // 清理当前流程的旧执行结果，防止新节点引用到残留数据
                Graph.Registry?.ClearFlow(Graph.GraphId);

                // 后台线程反序列化，避免卡 UI（让加载动画正常转动）
                FlowGraph Result = await System.Threading.Tasks.Task.Run(() => FlowFileStore.Load(filePath));
                if (Result != null)
                {
                    Result.GraphId = Graph.GraphId;
                    Result.GraphName = Graph.GraphName;
                    var idMap = new Dictionary<string, string>();
                    foreach (var item in Result.Nodes)
                    {
                        string oldNodeId = item.NodeId;
                        item.InitializeNode(Graph.GraphId, Graph.GraphName, Graph.Registry);
                        if (!string.IsNullOrEmpty(oldNodeId))
                            idMap[oldNodeId] = item.NodeId;
                    }
                    // 重映射顶层连接线的 SourceNodeId/TargetNodeId
                    if (Result.Connections != null && idMap.Count > 0)
                    {
                        foreach (var conn in Result.Connections)
                        {
                            if (idMap.TryGetValue(conn.SourceNodeId, out var newSrcId))
                                conn.SourceNodeId = newSrcId;
                            if (idMap.TryGetValue(conn.TargetNodeId, out var newTgtId))
                                conn.TargetNodeId = newTgtId;
                        }
                    }
                    // 将导入内容复制到现有 Graph，保持对象引用不变
                    // （FlowTabItem.Graph、FlowCanvas._graph 等不会失效）
                    // 释放被替换掉的旧节点插件资源（相机/图像等大对象），配合开头 ClearFlow 彻底清掉旧节点运行数据
                    foreach (var oldNode in Graph.Nodes)
                    {
                        try { oldNode.PluginModel?.Dispose(); } catch { }
                    }
                    Graph.Nodes.Clear();
                    foreach (var n in Result.Nodes)
                        Graph.Nodes.Add(n);
                    Graph.Connections.Clear();
                    foreach (var c in Result.Connections)
                        Graph.Connections.Add(c);
                    GraphDataChanged?.Invoke(Graph, null);
                    MarkDirty(); // 导入的新内容尚未保存
                }
                return Result != null;
            }
            finally
            {
                IsLoading = false;
            }
        }

        #endregion
    }

    /// <summary>
    /// 工具箱作用域。决定一个流程编辑器展示哪一批插件、按什么枚举分组。
    /// </summary>
    public enum FlowToolboxScope
    {
        /// <summary>主流程：排除子流程专用节点，按 PluginCategory 分组。</summary>
        Main = 0,
        /// <summary>Halcon 子流程：只显 Halocn模块 的子流程专用节点，按 VisionPlugin 分组。</summary>
        Vision = 1,
        /// <summary>VisionPro 子流程：只显 Vpp模块 的子流程专用节点（与 Halcon 平台互相隔离）。</summary>
        VisionVpp = 2,
        /// <summary>VisionMaster 子流程：只显 Vm模块 的子流程专用节点（与 Halcon/Vpp 平台互相隔离）。</summary>
        VisionVm = 3,
    }

    /// <summary>
    /// 工具箱分组
    /// </summary>
    public class ToolboxGroup
    {
        public string GroupName { get; set; }
        public PluginCategory Category { get; set; }
        public string GroupIcon { get; set; }
        public List<NodePluginInfo> Items { get; set; } = new List<NodePluginInfo>();
    }

    internal static class CategoryIconMap
    {
        public static string GetIcon(PluginCategory category)
        {
            switch (category)
            {
                // 视觉模块：相机 Camera
                case PluginCategory.视觉模块: return "Camera";
                // 硬件模块：主板芯片 Memory
                case PluginCategory.硬件模块: return "Memory";
                // 通讯模块：信号 Wifi
                case PluginCategory.通讯模块: return "Wifi";
                // Mes模块：表格 Table
                case PluginCategory.Mes模块: return "Table";
                // 逻辑判断：分支 CallSplit
                case PluginCategory.逻辑判断: return "CallSplit";
                // 深度学习：神经网络 Brain
                case PluginCategory.深度学习: return "Brain";
                // 文件操作：文档 FileDocumentOutline
                case PluginCategory.文件操作: return "FileDocumentOutline";
                // Vpp模块：Cognex VisionPro，图像对焦检测 ImageFilterCenterFocus
                case PluginCategory.Vpp模块: return "ImageFilterCenterFocus";
                // Vm模块：VisionMaster，相机光圈 CameraIris
                case PluginCategory.Vm模块: return "CameraIris";
                // Halocn模块：HALCON，六边形 HexagonOutline
                case PluginCategory.Halocn模块: return "HexagonOutline";
                // OpenCv模块：OpenCV，代码括号 CodeBraces
                case PluginCategory.OpenCv模块: return "CodeBraces";
                // 三维视觉：立方体 CubeOutline
                case PluginCategory.三维视觉: return "CubeOutline";
                default: return "CircleOutline";
            }
        }
    }

    /// <summary>
    /// VisionPlugin 枚举 → MahApps Material 图标 Kind 名映射（子流程工具箱分组图标用）。
    /// Kind 名无法识别时 IconKindConverter 会回退 CircleOutline，不会崩溃。
    /// </summary>
    internal static class VisionCategoryIconMap
    {
        public static string GetIcon(VisionPlugin category)
        {
            switch (category)
            {
                // 图像处理：滤镜 ImageFilterVintage
                case VisionPlugin.图像处理: return "ImageFilterVintage";
                // 检测识别：目标框 SelectionEllipseArrowInside
                case VisionPlugin.检测识别: return "FeatureSearchOutline";
                // 几何测量：尺子 Ruler
                case VisionPlugin.几何测量: return "Ruler";
                // 坐标标定：坐标系 AxisArrow
                case VisionPlugin.坐标标定: return "AxisArrow";
                // 深度学习：神经网络 Brain
                case VisionPlugin.深度学习: return "Brain";
                // 三维视觉：立方体 CubeOutline
                case VisionPlugin.三维视觉: return "CubeOutline";
                default: return "HexagonOutline";
            }
        }
    }
}