using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Shapes;

namespace XP.ImageProcessing.RoiControl.Models
{
    /// <summary>通孔填锡率测量组（4个椭圆中心 + 连线 + 标签）</summary>
    public class FillRateGroup
    {
        // 四个椭圆中心的可拖拽圆点
        public Ellipse DotE1 { get; set; }  // 底部（蓝）
        public Ellipse DotE2 { get; set; }  // 顶部（青）
        public Ellipse DotE3 { get; set; }  // 填锡起点（黄）
        public Ellipse DotE4 { get; set; }  // 填锡终点（绿）

        // 长轴/短轴手柄（每个椭圆2个）
        public Ellipse E1AH { get; set; }
        public Ellipse E1BH { get; set; }
        public Ellipse E2AH { get; set; }
        public Ellipse E2BH { get; set; }
        public Ellipse E3AH { get; set; }
        public Ellipse E3BH { get; set; }
        public Ellipse E4AH { get; set; }
        public Ellipse E4BH { get; set; }

        // 椭圆路径
        public Path PathE1 { get; set; }
        public Path PathE2 { get; set; }
        public Path PathE3 { get; set; }
        public Path PathE4 { get; set; }

        // 连线：E1→E2（全高度），E3→E4（填锡高度）
        public Line FullLine { get; set; }
        public Line FillLine { get; set; }

        public TextBlock Label { get; set; }

        // 四个椭圆中心坐标
        public Point E1 { get; set; }
        public Point E2 { get; set; }
        public Point E3 { get; set; }
        public Point E4 { get; set; }

        // 椭圆轴参数（默认值，后续可拖拽调整）
        public double E1A { get; set; } = 60;
        public double E1B { get; set; } = 50;
        public double E1Angle { get; set; }
        public double E2A { get; set; } = 60;
        public double E2B { get; set; } = 50;
        public double E2Angle { get; set; }
        public double E3A { get; set; } = 60;
        public double E3B { get; set; } = 50;
        public double E3Angle { get; set; }
        public double E4A { get; set; } = 55;
        public double E4B { get; set; } = 45;
        public double E4Angle { get; set; }

        public double THTLimit { get; set; } = 75.0;

        public double FillRate
        {
            get
            {
                double fullDx = E2.X - E1.X, fullDy = E2.Y - E1.Y;
                double fullDist = Math.Sqrt(fullDx * fullDx + fullDy * fullDy);
                double fillDx = E4.X - E3.X, fillDy = E4.Y - E3.Y;
                double fillDist = Math.Sqrt(fillDx * fillDx + fillDy * fillDy);
                return fullDist > 0 ? Math.Clamp(fillDist / fullDist * 100.0, 0, 100) : 0;
            }
        }

        public string Classification => FillRate >= THTLimit ? "PASS" : "FAIL";

        public void UpdateVisuals()
        {
            UpdateEllipsePath(PathE1, E1, E1A, E1B, E1Angle);
            UpdateEllipsePath(PathE2, E2, E2A, E2B, E2Angle);
            UpdateEllipsePath(PathE3, E3, E3A, E3B, E3Angle);
            UpdateEllipsePath(PathE4, E4, E4A, E4B, E4Angle);

            FullLine.X1 = E1.X; FullLine.Y1 = E1.Y;
            FullLine.X2 = E2.X; FullLine.Y2 = E2.Y;
            FullLine.Visibility = Visibility.Visible;

            FillLine.X1 = E3.X; FillLine.Y1 = E3.Y;
            FillLine.X2 = E4.X; FillLine.Y2 = E4.Y;
            FillLine.Visibility = Visibility.Visible;

            // 轴手柄定位
            SetHandle(E1AH, EdgePoint(E1, E1A, E1Angle));
            SetHandle(E1BH, EdgePoint(E1, E1B, E1Angle + 90));
            SetHandle(E2AH, EdgePoint(E2, E2A, E2Angle));
            SetHandle(E2BH, EdgePoint(E2, E2B, E2Angle + 90));
            SetHandle(E3AH, EdgePoint(E3, E3A, E3Angle));
            SetHandle(E3BH, EdgePoint(E3, E3B, E3Angle + 90));
            SetHandle(E4AH, EdgePoint(E4, E4A, E4Angle));
            SetHandle(E4BH, EdgePoint(E4, E4B, E4Angle + 90));

            double rate = FillRate;
            string cls = Classification;
            Label.Text = $"{rate:F1}% {cls}";
            Label.Foreground = cls == "PASS" ? Brushes.Lime : Brushes.Red;
            double labelX = Math.Max(Math.Max(E1.X, E2.X), Math.Max(E3.X, E4.X)) + 15;
            double labelY = (E1.Y + E2.Y) / 2;
            Canvas.SetLeft(Label, labelX);
            Canvas.SetTop(Label, labelY - 10);
            Label.Visibility = Visibility.Visible;
        }

        /// <summary>获取所有 UI 元素（用于添加/移除）</summary>
        public UIElement[] AllElements => new UIElement[]
        {
            PathE1, PathE2, PathE3, PathE4, FullLine, FillLine, Label,
            DotE1, DotE2, DotE3, DotE4,
            E1AH, E1BH, E2AH, E2BH, E3AH, E3BH, E4AH, E4BH
        };

        private static Point EdgePoint(Point center, double radius, double angleDeg)
        {
            double rad = angleDeg * Math.PI / 180.0;
            return new Point(center.X + radius * Math.Cos(rad), center.Y + radius * Math.Sin(rad));
        }

        private static void SetHandle(Ellipse h, Point pos)
        {
            if (h == null) return;
            Canvas.SetLeft(h, pos.X - h.Width / 2);
            Canvas.SetTop(h, pos.Y - h.Height / 2);
        }

        public static double Dist(Point a, Point b)
        {
            double dx = b.X - a.X, dy = b.Y - a.Y;
            return Math.Sqrt(dx * dx + dy * dy);
        }

        private static void UpdateEllipsePath(Path path, Point center, double a, double b, double angleDeg)
        {
            var eg = new EllipseGeometry(center, a, b);
            if (Math.Abs(angleDeg) > 0.01)
                eg.Transform = new RotateTransform(angleDeg, center.X, center.Y);
            path.Data = eg;
            path.Visibility = Visibility.Visible;
        }
    }
}