using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Windows.Forms;
using AGVMapEditor.Models;
using AGVNavigationCore.Models;

namespace AGVMapEditor.Controls
{
    /// <summary>
    /// 대화형 맵 편집 캔버스 컨트롤
    /// 마우스로 노드 추가, 드래그 이동, 연결 등의 기능 제공
    /// </summary>
    public partial class MapCanvasInteractive : UserControl
    {
        #region Constants

        private const int NODE_SIZE = 24;
        private const int NODE_RADIUS = NODE_SIZE / 2;
        private const int GRID_SIZE = 20;
        private const float CONNECTION_WIDTH = 2.0f;
        private const int SNAP_DISTANCE = 10;

        #endregion

        #region Enums

        /// <summary>
        /// 편집 모드 열거형
        /// </summary>
        public enum EditMode
        {
            Select,     // 선택 모드
            Move,       // 이동 모드
            AddNode,    // 노드 추가 모드
            Connect,    // 연결 모드
            Delete,     // 삭제 모드
            AddLabel,   // 라벨 추가 모드
            AddImage    // 이미지 추가 모드
        }

        #endregion

        #region Fields

        private List<MapNode> _nodes;
        private MapNode _selectedNode;
        
        // UI 요소들
        private Image _companyLogo;
        private string _companyLogoPath = string.Empty;
        private string _measurementInfo = "스케일: 1:100\n면적: 1000㎡\n최종 수정: " + DateTime.Now.ToString("yyyy-MM-dd");
        
        private MapNode _hoveredNode;
        private bool _isDragging;
        private Point _dragOffset;
        private Point _lastMousePosition;

        // 연결 모드 관련
        private bool _isConnectionMode;
        private MapNode _connectionStartNode;
        private Point _connectionEndPoint;

        // 편집 모드
        private EditMode _editMode = EditMode.Select;

        // 그리드 및 줌 관련
        private bool _showGrid = true;
        private float _zoomFactor = 1.0f;
        private Point _panOffset = Point.Empty;
        private bool _isPanning;

        // 자동 증가 카운터
        private int _nodeCounter = 1;

        // 브러쉬 및 펜
        private Brush _normalNodeBrush;
        private Brush _rotationNodeBrush;
        private Brush _dockingNodeBrush;
        private Brush _chargingNodeBrush;
        private Brush _selectedNodeBrush;
        private Brush _hoveredNodeBrush;
        private Brush _gridBrush;
        private Pen _connectionPen;
        private Pen _gridPen;
        private Pen _tempConnectionPen;
        private Pen _selectedNodePen;

        // 컨텍스트 메뉴
        private ContextMenuStrip _contextMenu;

        #endregion

        #region Properties

        /// <summary>
        /// 현재 편집 모드
        /// </summary>
        public EditMode CurrentEditMode
        {
            get => _editMode;
            set
            {
                _editMode = value;
                // 모드 변경시 연결 모드 해제
                if (_editMode != EditMode.Connect)
                {
                    CancelConnection();
                }
                Cursor = GetCursorForMode(_editMode);
                Invalidate();
            }
        }

        /// <summary>
        /// 그리드 표시 여부
        /// </summary>
        public bool ShowGrid
        {
            get => _showGrid;
            set
            {
                _showGrid = value;
                Invalidate();
            }
        }

        /// <summary>
        /// 줌 팩터
        /// </summary>
        public float ZoomFactor
        {
            get => _zoomFactor;
            set
            {
                _zoomFactor = Math.Max(0.1f, Math.Min(5.0f, value));
                Invalidate();
            }
        }


        /// <summary>
        /// 선택된 노드
        /// </summary>
        public MapNode SelectedNode => _selectedNode;

        /// <summary>
        /// 노드 목록
        /// </summary>
        public List<MapNode> Nodes
        {
            get => _nodes;
            set
            {
                _nodes = value ?? new List<MapNode>();
                UpdateNodeCounter();
                Invalidate();
            }
        }

        #endregion

        #region Events

        /// <summary>
        /// 노드가 추가되었을 때 발생하는 이벤트
        /// </summary>
        public event EventHandler<MapNode> NodeAdded;

        /// <summary>
        /// 노드가 선택되었을 때 발생하는 이벤트
        /// </summary>
        public event EventHandler<MapNode> NodeSelected;

        /// <summary>
        /// 노드가 이동되었을 때 발생하는 이벤트
        /// </summary>
        public event EventHandler<MapNode> NodeMoved;

        /// <summary>
        /// 노드가 삭제되었을 때 발생하는 이벤트
        /// </summary>
        public event EventHandler<MapNode> NodeDeleted;


        /// <summary>
        /// 노드 연결이 생성되었을 때 발생하는 이벤트
        /// </summary>
        public event EventHandler<(MapNode From, MapNode To)> ConnectionCreated;

        /// <summary>
        /// 맵이 변경되었을 때 발생하는 이벤트
        /// </summary>
        public event EventHandler MapChanged;

        #endregion

        #region Constructor

        public MapCanvasInteractive()
        {
            InitializeComponent();


            // Set Optimized Double Buffer to reduce flickering
            this.SetStyle(ControlStyles.UserPaint, true);
            this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
            this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
            this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);

            // Redraw when resized
            this.SetStyle(ControlStyles.ResizeRedraw, true);
            this.Resize += arLabel_Resize;

            InitializeCanvas();
        }
        void arLabel_Resize(object sender, EventArgs e)
        {
            Invalidate();
        }

        private void InitializeCanvas()
        {
            _nodes = new List<MapNode>();

            // 더블 버퍼링 및 기타 스타일 설정
            SetStyle(ControlStyles.AllPaintingInWmPaint |
                     ControlStyles.UserPaint |
                     ControlStyles.DoubleBuffer |
                     ControlStyles.ResizeRedraw, true);

            // 포커스를 받을 수 있도록 설정
            TabStop = true;

            InitializeGraphics();
            InitializeContextMenu();

            // 이벤트 연결
            MouseDown += OnMouseDown;
            MouseMove += OnMouseMove;
            MouseUp += OnMouseUp;
            MouseWheel += OnMouseWheel;
            KeyDown += OnKeyDown;

            BackColor = Color.White;
        }

        #endregion

        #region Graphics Initialization

        private void InitializeGraphics()
        {
            _normalNodeBrush = new SolidBrush(Color.LightBlue);
            _rotationNodeBrush = new SolidBrush(Color.Yellow);
            _dockingNodeBrush = new SolidBrush(Color.Orange);
            _chargingNodeBrush = new SolidBrush(Color.Green);
            _selectedNodeBrush = new SolidBrush(Color.Red);
            _hoveredNodeBrush = new SolidBrush(Color.Pink);
            _gridBrush = new SolidBrush(Color.LightGray);

            _connectionPen = new Pen(Color.Gray, CONNECTION_WIDTH);
            _gridPen = new Pen(Color.LightGray, 1.0f) { DashStyle = DashStyle.Dot };
            _tempConnectionPen = new Pen(Color.Blue, 2.0f) { DashStyle = DashStyle.Dash };
            _selectedNodePen = new Pen(Color.Black, 2.0f);
        }

        private void InitializeContextMenu()
        {
            _contextMenu = new ContextMenuStrip();

            var addNodeItem = new ToolStripMenuItem("노드 추가");
            addNodeItem.Click += (s, e) => SetEditMode(EditMode.AddNode);

            var connectItem = new ToolStripMenuItem("노드 연결");
            connectItem.Click += (s, e) => SetEditMode(EditMode.Connect);

            var deleteItem = new ToolStripMenuItem("삭제");
            deleteItem.Click += (s, e) => SetEditMode(EditMode.Delete);

            var separator1 = new ToolStripSeparator();

            var normalNodeItem = new ToolStripMenuItem("일반 노드로 변경");
            normalNodeItem.Click += (s, e) => ChangeSelectedNodeType(NodeType.Normal);

            var rotationNodeItem = new ToolStripMenuItem("회전 노드로 변경");
            rotationNodeItem.Click += (s, e) => ChangeSelectedNodeType(NodeType.Rotation);

            var dockingNodeItem = new ToolStripMenuItem("도킹 노드로 변경");
            dockingNodeItem.Click += (s, e) => ChangeSelectedNodeType(NodeType.Docking);

            var chargingNodeItem = new ToolStripMenuItem("충전 노드로 변경");
            chargingNodeItem.Click += (s, e) => ChangeSelectedNodeType(NodeType.Charging);

            _contextMenu.Items.AddRange(new ToolStripItem[]
            {
                addNodeItem, connectItem, deleteItem, separator1,
                normalNodeItem, rotationNodeItem, dockingNodeItem, chargingNodeItem
            });

            ContextMenuStrip = _contextMenu;
        }

        #endregion

        #region Public Methods

        /// <summary>
        /// 편집 모드 설정
        /// </summary>
        public void SetEditMode(EditMode mode)
        {
            CurrentEditMode = mode;
        }

        /// <summary>
        /// 노드 추가
        /// </summary>
        public MapNode AddNode(Point location, NodeType nodeType = NodeType.Normal)
        {
            var screenLocation = ScreenToWorld(location);
            var nodeId = $"N{_nodeCounter:D3}";
            _nodeCounter++;

            var newNode = new MapNode
            {
                NodeId = nodeId,
                Name = nodeId,
                Position = screenLocation,
                Type = nodeType,
                ConnectedNodes = new List<string>(),
                CanRotate = nodeType == NodeType.Rotation
            };

            _nodes.Add(newNode);
            SelectNode(newNode);

            NodeAdded?.Invoke(this, newNode);
            MapChanged?.Invoke(this, EventArgs.Empty);

            Invalidate();
            return newNode;
        }

        /// <summary>
        /// 노드 삭제
        /// </summary>
        public void DeleteNode(MapNode node)
        {
            if (node == null) return;

            // 다른 노드들의 연결에서 이 노드 제거
            foreach (var otherNode in _nodes)
            {
                if (otherNode.ConnectedNodes.Contains(node.NodeId))
                {
                    otherNode.ConnectedNodes.Remove(node.NodeId);
                }
            }

            _nodes.Remove(node);

            if (_selectedNode == node)
            {
                _selectedNode = null;
            }

            NodeDeleted?.Invoke(this, node);
            MapChanged?.Invoke(this, EventArgs.Empty);

            Invalidate();
        }

        /// <summary>
        /// 두 노드를 연결
        /// </summary>
        public void ConnectNodes(MapNode fromNode, MapNode toNode)
        {
            if (fromNode == null || toNode == null || fromNode == toNode) return;
            
            // 라벨이나 이미지 노드는 연결 불가
            if (fromNode.Type == NodeType.Label || fromNode.Type == NodeType.Image ||
                toNode.Type == NodeType.Label || toNode.Type == NodeType.Image)
            {
                return;
            }

            if (!fromNode.ConnectedNodes.Contains(toNode.NodeId))
            {
                fromNode.ConnectedNodes.Add(toNode.NodeId);
                ConnectionCreated?.Invoke(this, (fromNode, toNode));
                MapChanged?.Invoke(this, EventArgs.Empty);
                Invalidate();
            }
        }

        /// <summary>
        /// 화면 좌표를 월드 좌표로 변환
        /// </summary>
        public Point ScreenToWorld(Point screenPoint)
        {
            return new Point(
                (int)((screenPoint.X - _panOffset.X) / _zoomFactor),
                (int)((screenPoint.Y - _panOffset.Y) / _zoomFactor)
            );
        }

        /// <summary>
        /// 월드 좌표를 화면 좌표로 변환
        /// </summary>
        public Point WorldToScreen(Point worldPoint)
        {
            return new Point(
                (int)(worldPoint.X * _zoomFactor + _panOffset.X),
                (int)(worldPoint.Y * _zoomFactor + _panOffset.Y)
            );
        }

        /// <summary>
        /// 맵 전체 맞춤
        /// </summary>
        public void FitToMap()
        {
            if (_nodes == null || _nodes.Count == 0) return;

            var minX = _nodes.Min(n => n.Position.X) - 50;
            var maxX = _nodes.Max(n => n.Position.X) + 50;
            var minY = _nodes.Min(n => n.Position.Y) - 50;
            var maxY = _nodes.Max(n => n.Position.Y) + 50;

            var mapWidth = maxX - minX;
            var mapHeight = maxY - minY;

            var zoomX = (float)Width / mapWidth;
            var zoomY = (float)Height / mapHeight;
            _zoomFactor = Math.Min(zoomX, zoomY) * 0.9f;

            _panOffset = new Point(
                (int)((Width - mapWidth * _zoomFactor) / 2 - minX * _zoomFactor),
                (int)((Height - mapHeight * _zoomFactor) / 2 - minY * _zoomFactor)
            );

            Invalidate();
        }

        #endregion

        #region Mouse Event Handlers

        private void OnMouseDown(object sender, MouseEventArgs e)
        {
            Focus();

            var worldPoint = ScreenToWorld(e.Location);
            var clickedNode = GetNodeAtPoint(worldPoint);

            if (e.Button == MouseButtons.Left)
            {
                switch (_editMode)
                {
                    case EditMode.Select:
                        HandleSelectModeMouseDown(e, worldPoint, clickedNode);
                        break;

                    case EditMode.Move:
                        HandleMoveModeMouseDown(e, worldPoint, clickedNode);
                        break;

                    case EditMode.AddNode:
                        HandleAddNodeModeMouseDown(e, worldPoint, clickedNode);
                        break;

                    case EditMode.Connect:
                        HandleConnectModeMouseDown(e, worldPoint, clickedNode);
                        break;

                    case EditMode.Delete:
                        HandleDeleteModeMouseDown(e, worldPoint, clickedNode);
                        break;

                    case EditMode.AddLabel:
                        HandleAddLabelModeMouseDown(e, worldPoint);
                        break;

                    case EditMode.AddImage:
                        HandleAddImageModeMouseDown(e, worldPoint);
                        break;
                }
            }

            _lastMousePosition = e.Location;
        }

        private void OnMouseMove(object sender, MouseEventArgs e)
        {
            var worldPoint = ScreenToWorld(e.Location);
            var nodeAtPoint = GetNodeAtPoint(worldPoint);

            // 호버 상태 업데이트
            if (_hoveredNode != nodeAtPoint)
            {
                _hoveredNode = nodeAtPoint;
                Invalidate();
            }

            switch (_editMode)
            {
                case EditMode.Select:
                    HandleSelectModeMouseMove(e, worldPoint);
                    break;

                case EditMode.Move:
                    HandleMoveModeMouseMove(e, worldPoint);
                    break;

                case EditMode.Connect:
                    HandleConnectModeMouseMove(e, worldPoint);
                    break;
            }

            // 패닝 처리 (가운데 마우스 버튼)
            if (e.Button == MouseButtons.Middle)
            {
                var deltaX = e.X - _lastMousePosition.X;
                var deltaY = e.Y - _lastMousePosition.Y;

                _panOffset = new Point(_panOffset.X + deltaX, _panOffset.Y + deltaY);
                Invalidate();
            }

            _lastMousePosition = e.Location;
        }

        private void OnMouseUp(object sender, MouseEventArgs e)
        {
            _isDragging = false;
            _isPanning = false;
            Cursor = GetCursorForMode(_editMode);
        }

        private void OnMouseWheel(object sender, MouseEventArgs e)
        {
            var zoomFactor = e.Delta > 0 ? 1.1f : 0.9f;
            var newZoom = _zoomFactor * zoomFactor;

            if (newZoom >= 0.1f && newZoom <= 5.0f)
            {
                var mouseX = e.X - _panOffset.X;
                var mouseY = e.Y - _panOffset.Y;

                _panOffset = new Point(
                    (int)(_panOffset.X - mouseX * (zoomFactor - 1)),
                    (int)(_panOffset.Y - mouseY * (zoomFactor - 1))
                );

                _zoomFactor = newZoom;
                Invalidate();
            }
        }

        #endregion

        #region Mode-Specific Handlers

        private void HandleSelectModeMouseDown(MouseEventArgs e, Point worldPoint, MapNode clickedNode)
        {
            if (clickedNode != null)
            {
                SelectNode(clickedNode);
            }
            else
            {
                SelectNode(null);
            }
        }

        private void HandleSelectModeMouseMove(MouseEventArgs e, Point worldPoint)
        {
            // 선택 모드에서는 드래그 이동 비활성화
        }

        private void HandleAddNodeModeMouseDown(MouseEventArgs e, Point worldPoint, MapNode clickedNode)
        {
            if (clickedNode == null)
            {
                var snappedPoint = _showGrid ? SnapToGrid(worldPoint) : worldPoint;
                AddNode(WorldToScreen(snappedPoint));
            }
        }

        private void HandleConnectModeMouseDown(MouseEventArgs e, Point worldPoint, MapNode clickedNode)
        {
            if (clickedNode != null)
            {
                // 라벨이나 이미지 노드는 연결 불가
                if (clickedNode.Type == NodeType.Label || clickedNode.Type == NodeType.Image)
                {
                    return;
                }

                if (_connectionStartNode == null)
                {
                    // 연결 시작
                    _connectionStartNode = clickedNode;
                    _isConnectionMode = true;
                    SelectNode(clickedNode);
                }
                else if (_connectionStartNode != clickedNode)
                {
                    // 연결 완료
                    ConnectNodes(_connectionStartNode, clickedNode);
                    CancelConnection();
                }
                else
                {
                    // 같은 노드 클릭시 연결 취소
                    CancelConnection();
                }
            }
            else
            {
                CancelConnection();
            }
        }

        private void HandleConnectModeMouseMove(MouseEventArgs e, Point worldPoint)
        {
            if (_isConnectionMode)
            {
                _connectionEndPoint = worldPoint;
                Invalidate();
            }
        }

        private void HandleMoveModeMouseDown(MouseEventArgs e, Point worldPoint, MapNode clickedNode)
        {
            if (clickedNode != null)
            {
                SelectNode(clickedNode);
                _isDragging = true;
                _dragOffset = new Point(worldPoint.X - clickedNode.Position.X, worldPoint.Y - clickedNode.Position.Y);
                Cursor = Cursors.SizeAll;
            }
            else
            {
                SelectNode(null);
            }
        }

        private void HandleMoveModeMouseMove(MouseEventArgs e, Point worldPoint)
        {
            if (_isDragging && _selectedNode != null)
            {
                var newPosition = new Point(worldPoint.X - _dragOffset.X, worldPoint.Y - _dragOffset.Y);

                // 그리드에 스냅
                if (_showGrid)
                {
                    newPosition = SnapToGrid(newPosition);
                }

                _selectedNode.Position = newPosition;
                NodeMoved?.Invoke(this, _selectedNode);
                MapChanged?.Invoke(this, EventArgs.Empty);
                Invalidate();
            }
        }

        private void HandleDeleteModeMouseDown(MouseEventArgs e, Point worldPoint, MapNode clickedNode)
        {
            if (clickedNode != null)
            {
                DeleteNode(clickedNode);
            }
        }

        #endregion

        #region Helper Methods

        private MapNode GetNodeAtPoint(Point point)
        {
            foreach (var node in _nodes)
            {
                var screenPos = WorldToScreen(node.Position);
                var distance = Math.Sqrt(Math.Pow(point.X - node.Position.X, 2) + Math.Pow(point.Y - node.Position.Y, 2));

                if (distance <= NODE_RADIUS)
                {
                    return node;
                }
            }
            return null;
        }

        private void SelectNode(MapNode node)
        {
            _selectedNode = node;
            NodeSelected?.Invoke(this, node);
            Invalidate();
        }

        private Point SnapToGrid(Point point)
        {
            return new Point(
                (int)(Math.Round((double)point.X / GRID_SIZE) * GRID_SIZE),
                (int)(Math.Round((double)point.Y / GRID_SIZE) * GRID_SIZE)
            );
        }

        private Cursor GetCursorForMode(EditMode mode)
        {
            switch (mode)
            {
                case EditMode.Move: return Cursors.SizeAll;
                case EditMode.AddNode: return Cursors.Cross;
                case EditMode.Connect: return Cursors.Hand;
                case EditMode.Delete: return Cursors.No;
                default: return Cursors.Default;
            }
        }

        private void CancelConnection()
        {
            _isConnectionMode = false;
            _connectionStartNode = null;
            Invalidate();
        }

        private void ChangeSelectedNodeType(NodeType newType)
        {
            if (_selectedNode != null)
            {
                _selectedNode.Type = newType;
                _selectedNode.CanRotate = newType == NodeType.Rotation;
                MapChanged?.Invoke(this, EventArgs.Empty);
                Invalidate();
            }
        }

        private void HandleAddLabelModeMouseDown(MouseEventArgs e, Point worldPoint)
        {
            // 라벨 텍스트 입력 다이얼로그
            var text = Microsoft.VisualBasic.Interaction.InputBox("라벨 텍스트를 입력하세요:", "라벨 추가", "새 라벨");
            if (!string.IsNullOrEmpty(text))
            {
                var nodeId = GenerateNodeId("LBL");
                var labelNode = new MapNode(nodeId, text, worldPoint, NodeType.Label);
                labelNode.LabelText = text;
                
                _nodes.Add(labelNode);
                _selectedNode = labelNode;
                
                NodeAdded?.Invoke(this, labelNode);
                NodeSelected?.Invoke(this, labelNode);
                MapChanged?.Invoke(this, EventArgs.Empty);
                
                // 라벨 추가 후 자동으로 선택 모드로 전환
                CurrentEditMode = EditMode.Select;
                Invalidate();
            }
        }

        private void HandleAddImageModeMouseDown(MouseEventArgs e, Point worldPoint)
        {
            // 이미지 파일 선택 다이얼로그
            var openFileDialog = new OpenFileDialog
            {
                Filter = "Image Files|*.jpg;*.jpeg;*.png;*.bmp;*.gif;*.tiff|All Files|*.*",
                Title = "이미지 파일 선택"
            };
            
            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                var nodeId = GenerateNodeId("IMG");
                var imageNode = new MapNode(nodeId, System.IO.Path.GetFileNameWithoutExtension(openFileDialog.FileName), worldPoint, NodeType.Image);
                imageNode.ImagePath = openFileDialog.FileName;
                
                if (imageNode.LoadImage())
                {
                    _nodes.Add(imageNode);
                    _selectedNode = imageNode;
                    
                    NodeAdded?.Invoke(this, imageNode);
                    NodeSelected?.Invoke(this, imageNode);
                    MapChanged?.Invoke(this, EventArgs.Empty);
                    
                    // 이미지 추가 후 자동으로 선택 모드로 전환
                    CurrentEditMode = EditMode.Select;
                    Invalidate();
                }
                else
                {
                    MessageBox.Show("이미지 로드에 실패했습니다.", "오류", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }

        private string GenerateNodeId(string prefix)
        {
            int counter = 1;
            string nodeId;
            
            do
            {
                nodeId = $"{prefix}{counter:D3}";
                counter++;
            } while (_nodes.Any(n => n.NodeId == nodeId));
            
            return nodeId;
        }

        private void UpdateNodeCounter()
        {
            if (_nodes != null && _nodes.Count > 0)
            {
                // 기존 노드 중 가장 큰 번호 찾기
                var maxNumber = 0;
                foreach (var node in _nodes)
                {
                    if (node.NodeId.StartsWith("N") && int.TryParse(node.NodeId.Substring(1), out var number))
                    {
                        maxNumber = Math.Max(maxNumber, number);
                    }
                }
                _nodeCounter = maxNumber + 1;
            }
        }

        private Brush GetNodeBrush(MapNode node)
        {
            if (node == _selectedNode) return _selectedNodeBrush;
            if (node == _hoveredNode) return _hoveredNodeBrush;

            switch (node.Type)
            {
                case NodeType.Rotation: return _rotationNodeBrush;
                case NodeType.Docking: return _dockingNodeBrush;
                case NodeType.Charging: return _chargingNodeBrush;
                default: return _normalNodeBrush;
            }
        }

        #endregion

        #region Keyboard Handlers

        private void OnKeyDown(object sender, KeyEventArgs e)
        {
            switch (e.KeyCode)
            {
                case Keys.Delete:
                    if (_selectedNode != null)
                    {
                        DeleteNode(_selectedNode);
                    }
                    break;

                case Keys.Escape:
                    CancelConnection();
                    SelectNode(null);
                    break;

                case Keys.A:
                    if (e.Control)
                    {
                        SetEditMode(EditMode.AddNode);
                    }
                    break;

                case Keys.C:
                    if (e.Control)
                    {
                        SetEditMode(EditMode.Connect);
                    }
                    break;

                case Keys.D:
                    if (e.Control)
                    {
                        SetEditMode(EditMode.Delete);
                    }
                    break;

                case Keys.S:
                    if (e.Control)
                    {
                        SetEditMode(EditMode.Select);
                    }
                    break;

                case Keys.M:
                    if (e.Control)
                    {
                        SetEditMode(EditMode.Move);
                    }
                    break;
            }
        }

        #endregion

        #region Painting

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);

            var g = e.Graphics;
            g.SmoothingMode = SmoothingMode.AntiAlias;

            // 변환 행렬 설정
            g.TranslateTransform(_panOffset.X, _panOffset.Y);
            g.ScaleTransform(_zoomFactor, _zoomFactor);

            // 그리드 그리기
            if (_showGrid)
            {
                DrawGrid(g);
            }

            // 노드 연결선 그리기
            DrawConnections(g);

            // 임시 연결선 그리기 (연결 모드일 때)
            if (_isConnectionMode && _connectionStartNode != null)
            {
                DrawTempConnection(g);
            }

            // 노드 그리기 (라벨, 이미지 포함)
            DrawNodes(g);

            // 변환 행렬 리셋 후 UI 요소 그리기
            g.ResetTransform();
            DrawUI(g);
        }

        private void DrawGrid(Graphics g)
        {
            var startX = -(int)(_panOffset.X / _zoomFactor / GRID_SIZE) * GRID_SIZE;
            var startY = -(int)(_panOffset.Y / _zoomFactor / GRID_SIZE) * GRID_SIZE;
            var endX = startX + (int)(Width / _zoomFactor) + GRID_SIZE;
            var endY = startY + (int)(Height / _zoomFactor) + GRID_SIZE;

            for (int x = startX; x <= endX; x += GRID_SIZE)
            {
                g.DrawLine(_gridPen, x, startY, x, endY);
            }

            for (int y = startY; y <= endY; y += GRID_SIZE)
            {
                g.DrawLine(_gridPen, startX, y, endX, y);
            }
        }

        private void DrawConnections(Graphics g)
        {
            foreach (var node in _nodes)
            {
                foreach (var connectedNodeId in node.ConnectedNodes)
                {
                    var connectedNode = _nodes.FirstOrDefault(n => n.NodeId == connectedNodeId);
                    if (connectedNode != null)
                    {
                        g.DrawLine(_connectionPen, node.Position, connectedNode.Position);

                        // 방향 화살표 그리기
                        DrawArrow(g, node.Position, connectedNode.Position);
                    }
                }
            }
        }

        private void DrawTempConnection(Graphics g)
        {
            var screenEndPoint = ScreenToWorld(WorldToScreen(_connectionEndPoint));
            g.DrawLine(_tempConnectionPen, _connectionStartNode.Position, screenEndPoint);
        }

        private void DrawNodes(Graphics g)
        {
            foreach (var node in _nodes)
            {
                var brush = GetNodeBrush(node);
                var rect = new Rectangle(
                    node.Position.X - NODE_RADIUS,
                    node.Position.Y - NODE_RADIUS,
                    NODE_SIZE,
                    NODE_SIZE
                );

                // 노드 모양에 따른 그리기
                switch (node.Type)
                {
                    case NodeType.Label:
                        // 라벨 노드 - 텍스트 렌더링
                        DrawLabelNode(g, node);
                        continue; // 일반 노드 텍스트 렌더링 건너뛰기
                    
                    case NodeType.Image:
                        // 이미지 노드 - 이미지 렌더링
                        DrawImageNode(g, node);
                        continue; // 일반 노드 텍스트 렌더링 건너뛰기
                    
                    case NodeType.Rotation:
                        // 회전 노드 - 원형
                        g.FillEllipse(brush, rect);
                        g.DrawEllipse(_selectedNodePen, rect);
                        break;
                    
                    case NodeType.Docking:
                        // 도킹 노드 - 오각형
                        DrawPentagon(g, brush, _selectedNodePen, node.Position);
                        break;
                    
                    case NodeType.Charging:
                        // 충전 노드 - 삼각형
                        DrawTriangle(g, brush, _selectedNodePen, node.Position);
                        break;
                    
                    default:
                        // 일반 노드 - 사각형
                        g.FillRectangle(brush, rect);
                        g.DrawRectangle(_selectedNodePen, rect);
                        break;
                }

                // 선택된 노드는 테두리 강조
                if (node == _selectedNode)
                {
                    var selectedPen = new Pen(Color.Red, 3);
                    switch (node.Type)
                    {
                        case NodeType.Rotation:
                            g.DrawEllipse(selectedPen, rect);
                            break;
                        case NodeType.Docking:
                            DrawPentagonOutline(g, selectedPen, node.Position);
                            break;
                        case NodeType.Charging:
                            DrawTriangleOutline(g, selectedPen, node.Position);
                            break;
                        default:
                            g.DrawRectangle(selectedPen, rect);
                            break;
                    }
                    selectedPen.Dispose();
                }

                // 노드 설명이 있으면 노드 위에 표시
                if (!string.IsNullOrEmpty(node.Description))
                {
                    var descFont = new Font("Arial", 6);
                    var descTextSize = g.MeasureString(node.Description, descFont);
                    var descTextPos = new PointF(
                        node.Position.X - descTextSize.Width / 2,
                        node.Position.Y - NODE_RADIUS - descTextSize.Height - 2
                    );
                    
                    g.DrawString(node.Description, descFont, Brushes.DarkBlue, descTextPos);
                    descFont.Dispose();
                }

                // 노드 ID 표시
                var font = new Font("Arial", 8);
                var textBrush = Brushes.Black;
                var textSize = g.MeasureString(node.NodeId, font);
                var textPos = new PointF(
                    node.Position.X - textSize.Width / 2,
                    node.Position.Y + NODE_RADIUS + 2
                );

                g.DrawString(node.NodeId, font, textBrush, textPos);
                
                // RFID 값이 있으면 노드 이름 아래에 작게 표시
                if (!string.IsNullOrEmpty(node.RfidId))
                {
                    var rfidFont = new Font("Arial", 6);
                    var rfidTextSize = g.MeasureString(node.RfidId, rfidFont);
                    var rfidTextPos = new PointF(
                        node.Position.X - rfidTextSize.Width / 2,
                        node.Position.Y + NODE_RADIUS + 2 + textSize.Height
                    );
                    
                    g.DrawString(node.RfidId, rfidFont, Brushes.Gray, rfidTextPos);
                    rfidFont.Dispose();
                }
                
                font.Dispose();
            }
        }

        private void DrawArrow(Graphics g, Point start, Point end)
        {
            var angle = Math.Atan2(end.Y - start.Y, end.X - start.X);
            var arrowLength = 8;
            var arrowAngle = Math.PI / 6;

            var arrowPoint1 = new PointF(
                (float)(end.X - arrowLength * Math.Cos(angle - arrowAngle)),
                (float)(end.Y - arrowLength * Math.Sin(angle - arrowAngle))
            );

            var arrowPoint2 = new PointF(
                (float)(end.X - arrowLength * Math.Cos(angle + arrowAngle)),
                (float)(end.Y - arrowLength * Math.Sin(angle + arrowAngle))
            );

            g.DrawLine(_connectionPen, end, arrowPoint1);
            g.DrawLine(_connectionPen, end, arrowPoint2);
        }

        private void DrawUI(Graphics g)
        {
            // 현재 모드 표시
            var modeText = $"모드: {GetModeText(_editMode)}";
            var font = new Font("Arial", 10, FontStyle.Bold);
            var textBrush = Brushes.Black;
            var backgroundBrush = new SolidBrush(Color.FromArgb(200, Color.White));

            var textSize = g.MeasureString(modeText, font);
            var textRect = new RectangleF(10, 10, textSize.Width + 10, textSize.Height + 5);

            g.FillRectangle(backgroundBrush, textRect);
            g.DrawString(modeText, font, textBrush, 15, 12);

            font.Dispose();
            backgroundBrush.Dispose();
        }

        private string GetModeText(EditMode mode)
        {
            switch (mode)
            {
                case EditMode.Select: return "선택";
                case EditMode.Move: return "이동";
                case EditMode.AddNode: return "노드 추가";
                case EditMode.Connect: return "노드 연결";
                case EditMode.Delete: return "삭제";
                case EditMode.AddLabel: return "라벨 추가";
                case EditMode.AddImage: return "이미지 추가";
                default: return "알 수 없음";
            }
        }

        private void DrawPentagon(Graphics g, Brush fillBrush, Pen outlinePen, Point center)
        {
            var points = GetPentagonPoints(center, NODE_RADIUS);
            g.FillPolygon(fillBrush, points);
            g.DrawPolygon(outlinePen, points);
        }

        private void DrawPentagonOutline(Graphics g, Pen pen, Point center)
        {
            var points = GetPentagonPoints(center, NODE_RADIUS);
            g.DrawPolygon(pen, points);
        }

        private PointF[] GetPentagonPoints(Point center, int radius)
        {
            var points = new PointF[5];
            var angle = -Math.PI / 2; // 시작 각도 (위쪽부터)
            
            for (int i = 0; i < 5; i++)
            {
                points[i] = new PointF(
                    center.X + (float)(radius * Math.Cos(angle)),
                    center.Y + (float)(radius * Math.Sin(angle))
                );
                angle += 2 * Math.PI / 5; // 72도씩 증가
            }
            
            return points;
        }

        private void DrawTriangle(Graphics g, Brush fillBrush, Pen outlinePen, Point center)
        {
            var points = GetTrianglePoints(center, NODE_RADIUS);
            g.FillPolygon(fillBrush, points);
            g.DrawPolygon(outlinePen, points);
        }

        private void DrawTriangleOutline(Graphics g, Pen pen, Point center)
        {
            var points = GetTrianglePoints(center, NODE_RADIUS);
            g.DrawPolygon(pen, points);
        }

        private PointF[] GetTrianglePoints(Point center, int radius)
        {
            var points = new PointF[3];
            var angle = -Math.PI / 2; // 시작 각도 (위쪽부터)
            
            for (int i = 0; i < 3; i++)
            {
                points[i] = new PointF(
                    center.X + (float)(radius * Math.Cos(angle)),
                    center.Y + (float)(radius * Math.Sin(angle))
                );
                angle += 2 * Math.PI / 3; // 120도씩 증가
            }
            
            return points;
        }


        /// <summary>
        /// 라벨 노드 그리기
        /// </summary>
        private void DrawLabelNode(Graphics g, MapNode node)
        {
            if (string.IsNullOrEmpty(node.LabelText)) return;

            // 폰트 생성
            var font = new Font(node.FontFamily, node.FontSize, node.FontStyle);
            var textBrush = new SolidBrush(node.ForeColor);
            
            // 배경 브러쉬 생성 (필요시)
            Brush backgroundBrush = null;
            if (node.ShowBackground)
            {
                backgroundBrush = new SolidBrush(node.BackColor);
            }

            // 텍스트 크기 측정
            var textSize = g.MeasureString(node.LabelText, font);
            var textRect = new RectangleF(
                node.Position.X - textSize.Width / 2,
                node.Position.Y - textSize.Height / 2,
                textSize.Width,
                textSize.Height
            );

            // 배경 그리기 (필요시)
            if (backgroundBrush != null)
            {
                g.FillRectangle(backgroundBrush, textRect);
            }

            // 텍스트 그리기
            g.DrawString(node.LabelText, font, textBrush, textRect.Location);

            // 선택된 노드는 테두리 표시
            if (node == _selectedNode)
            {
                var selectedPen = new Pen(Color.Red, 2);
                g.DrawRectangle(selectedPen, Rectangle.Round(textRect));
                selectedPen.Dispose();
            }

            // 리소스 정리
            font.Dispose();
            textBrush.Dispose();
            backgroundBrush?.Dispose();
        }

        /// <summary>
        /// 이미지 노드 그리기
        /// </summary>
        private void DrawImageNode(Graphics g, MapNode node)
        {
            // 이미지 로드 (필요시)
            if (node.LoadedImage == null && !string.IsNullOrEmpty(node.ImagePath))
            {
                node.LoadImage();
            }

            if (node.LoadedImage == null) return;

            // 실제 표시 크기 계산
            var displaySize = node.GetDisplaySize();
            if (displaySize.IsEmpty) return;

            var imageRect = new Rectangle(
                node.Position.X - displaySize.Width / 2,
                node.Position.Y - displaySize.Height / 2,
                displaySize.Width,
                displaySize.Height
            );

            // 투명도 적용
            var colorMatrix = new System.Drawing.Imaging.ColorMatrix();
            colorMatrix.Matrix33 = node.Opacity; // 알파 값 설정
            
            var imageAttributes = new System.Drawing.Imaging.ImageAttributes();
            imageAttributes.SetColorMatrix(colorMatrix, System.Drawing.Imaging.ColorMatrixFlag.Default,
                System.Drawing.Imaging.ColorAdjustType.Bitmap);

            // 회전 변환 적용 (필요시)
            var originalTransform = g.Transform;
            if (node.Rotation != 0)
            {
                g.TranslateTransform(node.Position.X, node.Position.Y);
                g.RotateTransform(node.Rotation);
                g.TranslateTransform(-node.Position.X, -node.Position.Y);
            }

            // 이미지 그리기
            g.DrawImage(node.LoadedImage, imageRect, 0, 0, node.LoadedImage.Width, node.LoadedImage.Height,
                GraphicsUnit.Pixel, imageAttributes);

            // 변환 복원
            g.Transform = originalTransform;

            // 선택된 노드는 테두리 표시
            if (node == _selectedNode)
            {
                var selectedPen = new Pen(Color.Red, 2);
                g.DrawRectangle(selectedPen, imageRect);
                selectedPen.Dispose();
            }

            // 리소스 정리
            imageAttributes.Dispose();
        }

        #endregion

        #region Cleanup

        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                // 컴포넌트 정리
                if (components != null)
                {
                    components.Dispose();
                }

                // 브러쉬 정리
                _normalNodeBrush?.Dispose();
                _rotationNodeBrush?.Dispose();
                _dockingNodeBrush?.Dispose();
                _chargingNodeBrush?.Dispose();
                _selectedNodeBrush?.Dispose();
                _hoveredNodeBrush?.Dispose();
                _gridBrush?.Dispose();

                // 펜 정리
                _connectionPen?.Dispose();
                _gridPen?.Dispose();
                _tempConnectionPen?.Dispose();
                _selectedNodePen?.Dispose();

                // 컨텍스트 메뉴 정리
                _contextMenu?.Dispose();
            }

            base.Dispose(disposing);
        }

        #endregion
    }
}