using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Shapes;
using DwgExtractorManual.Models;
using Brushes = System.Windows.Media.Brushes;
using MouseEventArgs = System.Windows.Input.MouseEventArgs;
using Point = System.Windows.Point;
using Rectangle = System.Windows.Shapes.Rectangle;

namespace DwgExtractorManual.Views
{
    public partial class TableCellVisualizationWindow : Window
    {
        private List<TableCellVisualizationData> _visualizationData;
        private TableCellVisualizationData? _currentData;
        private double _scale = 1.0;
        private const double MARGIN = 50;

        public TableCellVisualizationWindow(List<TableCellVisualizationData> visualizationData)
        {
            InitializeComponent();
            _visualizationData = visualizationData;
            LoadFileList();
        }

        private void LoadFileList()
        {
            lstFiles.ItemsSource = _visualizationData;
            if (_visualizationData.Count > 0)
            {
                lstFiles.SelectedIndex = 0;
            }
        }

        private void LstFiles_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (lstFiles.SelectedItem is TableCellVisualizationData selectedData)
            {
                _currentData = selectedData;
                RefreshVisualization();
                UpdateInfo();
            }
        }

        private void UpdateInfo()
        {
            if (_currentData == null)
            {
                txtInfo.Text = "파일을 선택하세요";
                txtStatus.Text = "준비됨";
                return;
            }

            txtInfo.Text = $"파일: {_currentData.FileName}\n" +
                          $"Note: {_currentData.NoteText}\n" +
                          $"셀 수: {_currentData.Cells.Count}\n" +
                          $"선분 수: {_currentData.TableSegments.Count}\n" +
                          $"텍스트 수: {_currentData.TextEntities.Count}\n" +
                          $"교차점 수: {_currentData.IntersectionPoints.Count}\n" +
                          $"대각선 수: {_currentData.DiagonalLines.Count}";

            txtStatus.Text = $"{_currentData.FileName} - 셀 {_currentData.Cells.Count}개";
        }

        private void RefreshVisualization()
        {
            if (_currentData == null) return;

            cnvVisualization.Children.Clear();

            // 좌표계 변환 계산
            var bounds = CalculateBounds();
            if (bounds == null) return;

            var (minX, minY, maxX, maxY) = bounds.Value;
            var dataWidth = maxX - minX;
            var dataHeight = maxY - minY;

            // 캔버스 크기 설정 (여백 포함)
            var canvasWidth = cnvVisualization.Width;
            var canvasHeight = cnvVisualization.Height;
            
            // 스케일 계산 (데이터가 캔버스에 맞도록)
            var scaleX = (canvasWidth - 2 * MARGIN) / dataWidth;
            var scaleY = (canvasHeight - 2 * MARGIN) / dataHeight;
            _scale = Math.Min(scaleX, scaleY) * 0.9; // 여유분 10%

            // Note 경계 표시
            if (chkShowNoteBounds.IsChecked == true)
            {
                DrawNoteBounds(minX, minY, maxX, maxY);
            }

            // 선분 표시
            if (chkShowSegments.IsChecked == true)
            {
                DrawSegments();
            }

            // 셀 경계 표시 (기존)
            if (chkShowCells.IsChecked == true)
            {
                DrawCells();
            }

            // 정확한 셀 경계 표시 (새로운)
            if (chkShowCellBoundaries.IsChecked == true)
            {
                DrawCellBoundaries();
            }

            // 텍스트 표시
            if (chkShowTexts.IsChecked == true)
            {
                DrawTexts();
            }

            // 교차점 표시
            if (chkShowIntersections.IsChecked == true)
            {
                DrawIntersections();
            }

            // 대각선 표시 (셀 디버깅용)
            if (chkShowDiagonals.IsChecked == true)
            {
                DrawDiagonals();
            }
        }

        private (double minX, double minY, double maxX, double maxY)? CalculateBounds()
        {
            if (_currentData == null || _currentData.Cells.Count == 0) return null;

            var minX = _currentData.Cells.Min(c => c.MinX);
            var minY = _currentData.Cells.Min(c => c.MinY);
            var maxX = _currentData.Cells.Max(c => c.MaxX);
            var maxY = _currentData.Cells.Max(c => c.MaxY);

            // 선분도 고려
            if (_currentData.TableSegments.Count > 0)
            {
                minX = Math.Min(minX, _currentData.TableSegments.Min(s => Math.Min(s.StartX, s.EndX)));
                minY = Math.Min(minY, _currentData.TableSegments.Min(s => Math.Min(s.StartY, s.EndY)));
                maxX = Math.Max(maxX, _currentData.TableSegments.Max(s => Math.Max(s.StartX, s.EndX)));
                maxY = Math.Max(maxY, _currentData.TableSegments.Max(s => Math.Max(s.StartY, s.EndY)));
            }

            // 교차점도 고려
            if (_currentData.IntersectionPoints.Count > 0)
            {
                minX = Math.Min(minX, _currentData.IntersectionPoints.Min(i => i.X));
                minY = Math.Min(minY, _currentData.IntersectionPoints.Min(i => i.Y));
                maxX = Math.Max(maxX, _currentData.IntersectionPoints.Max(i => i.X));
                maxY = Math.Max(maxY, _currentData.IntersectionPoints.Max(i => i.Y));
            }

            // 대각선도 고려
            if (_currentData.DiagonalLines.Count > 0)
            {
                minX = Math.Min(minX, _currentData.DiagonalLines.Min(d => Math.Min(d.StartX, d.EndX)));
                minY = Math.Min(minY, _currentData.DiagonalLines.Min(d => Math.Min(d.StartY, d.EndY)));
                maxX = Math.Max(maxX, _currentData.DiagonalLines.Max(d => Math.Max(d.StartX, d.EndX)));
                maxY = Math.Max(maxY, _currentData.DiagonalLines.Max(d => Math.Max(d.StartY, d.EndY)));
            }

            // 정확한 셀 경계도 고려
            if (_currentData.CellBoundaries != null && _currentData.CellBoundaries.Count > 0)
            {
                var allCellX = _currentData.CellBoundaries.SelectMany(cb => new[] { cb.TopLeftX, cb.TopRightX, cb.BottomLeftX, cb.BottomRightX });
                var allCellY = _currentData.CellBoundaries.SelectMany(cb => new[] { cb.TopLeftY, cb.TopRightY, cb.BottomLeftY, cb.BottomRightY });
                
                minX = Math.Min(minX, allCellX.Min());
                minY = Math.Min(minY, allCellY.Min());
                maxX = Math.Max(maxX, allCellX.Max());
                maxY = Math.Max(maxY, allCellY.Max());
            }

            return (minX, minY, maxX, maxY);
        }

        private Point TransformPoint(double x, double y)
        {
            var bounds = CalculateBounds();
            if (bounds == null) return new Point(0, 0);

            var (minX, minY, maxX, maxY) = bounds.Value;
            
            // CAD 좌표계 -> WPF 좌표계 변환 (Y축 뒤집기)
            var transformedX = (x - minX) * _scale + MARGIN;
            var transformedY = cnvVisualization.Height - ((y - minY) * _scale + MARGIN);
            
            return new Point(transformedX, transformedY);
        }

        private void DrawNoteBounds(double minX, double minY, double maxX, double maxY)
        {
            var topLeft = TransformPoint(minX, maxY);
            var bottomRight = TransformPoint(maxX, minY);

            var rect = new Rectangle
            {
                Width = bottomRight.X - topLeft.X,
                Height = bottomRight.Y - topLeft.Y,
                Stroke = Brushes.Red,
                StrokeThickness = 2,
                StrokeDashArray = new DoubleCollection { 5, 5 },
                Fill = null
            };

            Canvas.SetLeft(rect, topLeft.X);
            Canvas.SetTop(rect, topLeft.Y);
            cnvVisualization.Children.Add(rect);
        }

        private void DrawSegments()
        {
            if (_currentData == null) return;
            foreach (var segment in _currentData.TableSegments)
            {
                var startPoint = TransformPoint(segment.StartX, segment.StartY);
                var endPoint = TransformPoint(segment.EndX, segment.EndY);

                var line = new Line
                {
                    X1 = startPoint.X,
                    Y1 = startPoint.Y,
                    X2 = endPoint.X,
                    Y2 = endPoint.Y,
                    Stroke = segment.IsHorizontal ? Brushes.Blue : Brushes.Green,
                    StrokeThickness = 1
                };

                cnvVisualization.Children.Add(line);
            }
        }

        private void DrawCells()
        {
            if (_currentData == null) return;
            var colors = new[] { Brushes.Red, Brushes.Blue, Brushes.Green, Brushes.Purple, Brushes.Orange };
            
            for (int i = 0; i < _currentData.Cells.Count; i++)
            {
                var cell = _currentData.Cells[i];
                var topLeft = TransformPoint(cell.MinX, cell.MaxY);
                var bottomRight = TransformPoint(cell.MaxX, cell.MinY);

                var rect = new Rectangle
                {
                    Width = bottomRight.X - topLeft.X,
                    Height = bottomRight.Y - topLeft.Y,
                    Stroke = colors[i % colors.Length],
                    StrokeThickness = 2,
                    Fill = null
                };

                Canvas.SetLeft(rect, topLeft.X);
                Canvas.SetTop(rect, topLeft.Y);
                cnvVisualization.Children.Add(rect);

                // 셀 번호 표시
                var label = new TextBlock
                {
                    Text = $"R{cell.Row}C{cell.Column}", // 이미 1-based 인덱싱 적용됨
                    FontSize = 8, // 폰트 크기 조정
                    Foreground = colors[i % colors.Length],
                    FontWeight = FontWeights.Bold
                };

                Canvas.SetLeft(label, topLeft.X + 2); // 좌상단에 위치 + 약간의 패딩
                Canvas.SetTop(label, topLeft.Y + 2);  // 좌상단에 위치 + 약간의 패딩
                cnvVisualization.Children.Add(label);

                // 셀 텍스트 표시
                if (!string.IsNullOrEmpty(cell.Text))
                {
                    var textLabel = new TextBlock
                    {
                        Text = cell.Text,
                        FontSize = 8,
                        Foreground = Brushes.Black,
                        Background = Brushes.LightYellow
                    };

                    // 셀 텍스트는 셀 중앙에 표시
                    var centerPoint = TransformPoint(cell.CenterX, cell.CenterY);
                    Canvas.SetLeft(textLabel, centerPoint.X - (textLabel.ActualWidth / 2)); // 텍스트 중앙 정렬
                    Canvas.SetTop(textLabel, centerPoint.Y - (textLabel.ActualHeight / 2)); // 텍스트 중앙 정렬
                    cnvVisualization.Children.Add(textLabel);
                }
            }
        }

        private void DrawCellBoundaries()
        {
            if (_currentData == null || _currentData.CellBoundaries == null) return;
            
            for (int i = 0; i < _currentData.CellBoundaries.Count; i++)
            {
                var cellBoundary = _currentData.CellBoundaries[i];
                
                // 4개 모서리 좌표 변환
                var topLeft = TransformPoint(cellBoundary.TopLeftX, cellBoundary.TopLeftY);
                var topRight = TransformPoint(cellBoundary.TopRightX, cellBoundary.TopRightY);
                var bottomLeft = TransformPoint(cellBoundary.BottomLeftX, cellBoundary.BottomLeftY);
                var bottomRight = TransformPoint(cellBoundary.BottomRightX, cellBoundary.BottomRightY);

                // 셀 경계를 Path로 그리기 (정확한 4개 모서리 연결)
                var pathGeometry = new PathGeometry();
                var pathFigure = new PathFigure();
                pathFigure.StartPoint = topLeft;
                pathFigure.Segments.Add(new LineSegment(topRight, true));
                pathFigure.Segments.Add(new LineSegment(bottomRight, true));
                pathFigure.Segments.Add(new LineSegment(bottomLeft, true));
                pathFigure.IsClosed = true;
                pathGeometry.Figures.Add(pathFigure);

                var path = new Path
                {
                    Data = pathGeometry,
                    Stroke = Brushes.DarkBlue,
                    StrokeThickness = 3,
                    Fill = null
                };

                cnvVisualization.Children.Add(path);

                // 라벨 표시 (셀 중앙)
                if (!string.IsNullOrEmpty(cellBoundary.Label))
                {
                    var centerX = (topLeft.X + bottomRight.X) / 2;
                    var centerY = (topLeft.Y + bottomRight.Y) / 2;
                    
                    var label = new TextBlock
                    {
                        Text = cellBoundary.Label,
                        FontSize = 10,
                        Foreground = Brushes.DarkBlue,
                        FontWeight = FontWeights.Bold,
                        Background = Brushes.LightCyan
                    };

                    Canvas.SetLeft(label, centerX - 15); // 대략적인 중앙 정렬
                    Canvas.SetTop(label, centerY - 6);
                    cnvVisualization.Children.Add(label);
                }
            }
        }

        private void DrawTexts()
        {
            if (_currentData == null) return;
            foreach (var text in _currentData.TextEntities)
            {
                var point = TransformPoint(text.X, text.Y);
                
                var textBlock = new TextBlock
                {
                    Text = text.Text,
                    FontSize = 9,
                    Foreground = text.IsInTable ? Brushes.DarkBlue : Brushes.Gray
                };

                Canvas.SetLeft(textBlock, point.X);
                Canvas.SetTop(textBlock, point.Y);
                cnvVisualization.Children.Add(textBlock);

                // 텍스트 위치 점 표시
                var dot = new Ellipse
                {
                    Width = 3,
                    Height = 3,
                    Fill = text.IsInTable ? Brushes.Blue : Brushes.Gray
                };

                Canvas.SetLeft(dot, point.X - 1.5);
                Canvas.SetTop(dot, point.Y - 1.5);
                cnvVisualization.Children.Add(dot);
            }
        }

        private void DrawIntersections()
        {
            if (_currentData == null) return;
            foreach (var intersection in _currentData.IntersectionPoints)
            {
                var point = TransformPoint(intersection.X, intersection.Y);
                
                // 교차점 원 표시
                var circle = new Ellipse
                {
                    Width = 8,
                    Height = 8,
                    Fill = GetIntersectionColor(intersection),
                    Stroke = Brushes.Black,
                    StrokeThickness = 1
                };

                Canvas.SetLeft(circle, point.X - 4);
                Canvas.SetTop(circle, point.Y - 4);
                cnvVisualization.Children.Add(circle);

                // 교차점 타입 숫자 표시 (우측에)
                var numberLabel = new TextBlock
                {
                    Text = intersection.DirectionBits.ToString(),
                    FontSize = 12,
                    FontWeight = FontWeights.Bold,
                    Foreground = Brushes.Black,
                    Background = Brushes.Yellow,
                    Padding = new Thickness(2)
                };

                Canvas.SetLeft(numberLabel, point.X + 8); // 교차점 우측에 표시
                Canvas.SetTop(numberLabel, point.Y - 6);  // 약간 위쪽으로 조정
                cnvVisualization.Children.Add(numberLabel);
            }
        }

        private void DrawDiagonals()
        {
            if (_currentData == null) return;
            foreach (var diagonal in _currentData.DiagonalLines)
            {
                var startPoint = TransformPoint(diagonal.StartX, diagonal.StartY);
                var endPoint = TransformPoint(diagonal.EndX, diagonal.EndY);
                
                // 대각선 표시
                var line = new Line
                {
                    X1 = startPoint.X,
                    Y1 = startPoint.Y,
                    X2 = endPoint.X,
                    Y2 = endPoint.Y,
                    Stroke = Brushes.Green,
                    StrokeThickness = 2,
                    StrokeDashArray = new DoubleCollection { 5, 3 } // 점선으로 표시
                };
                cnvVisualization.Children.Add(line);
                
                // 대각선 중앙에 라벨 표시
                if (!string.IsNullOrEmpty(diagonal.Label))
                {
                    var centerX = (startPoint.X + endPoint.X) / 2;
                    var centerY = (startPoint.Y + endPoint.Y) / 2;
                    
                    var label = new TextBlock
                    {
                        Text = diagonal.Label,
                        FontSize = 9,
                        FontWeight = FontWeights.Bold,
                        Foreground = Brushes.Green,
                        Background = Brushes.White
                    };
                    Canvas.SetLeft(label, centerX - 20); // 중앙에서 약간 왼쪽으로
                    Canvas.SetTop(label, centerY - 10);  // 중앙에서 약간 위쪽으로
                    cnvVisualization.Children.Add(label);
                }
            }
        }

        private System.Windows.Media.Brush GetIntersectionColor(IntersectionInfo intersection)
        {
            if (intersection.IsTopLeft && intersection.IsBottomRight)
                return Brushes.Purple; // 둘 다 가능
            else if (intersection.IsTopLeft)
                return Brushes.Green;  // topLeft 후보
            else if (intersection.IsBottomRight)
                return Brushes.Blue;   // bottomRight 후보
            else
                return Brushes.Red;    // 기타
        }

        private void RefreshVisualization(object sender, RoutedEventArgs e)
        {
            RefreshVisualization();
        }

        private void BtnZoomFit_Click(object sender, RoutedEventArgs e)
        {
            svViewer.Reset();
        }

        private void CnvVisualization_MouseMove(object sender, MouseEventArgs e)
        {
            var pos = e.GetPosition(cnvVisualization);
            txtMousePos.Text = $"마우스: ({pos.X:F0}, {pos.Y:F0})";
        }
    }
}