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

namespace XP.ImageProcessing.RoiControl.Models
{
    /// <summary>BGA 空隙测量中的一个圆（气泡或焊球）</summary>
    public class BgaCircle
    {
        public Ellipse Shape { get; set; }      // 圆形轮廓
        public Ellipse CenterDot { get; set; }  // 中心拖拽点
        public Ellipse EdgeDot { get; set; }    // 边缘拖拽点（调半径）
        public Point Center { get; set; }
        public double Radius { get; set; }
        public bool IsBall { get; set; }        // true=焊球, false=气泡

        public double Area => Math.PI * Radius * Radius;

        public void UpdateVisuals()
        {
            double d = Radius * 2;
            Shape.Width = d; Shape.Height = d;
            Canvas.SetLeft(Shape, Center.X - Radius);
            Canvas.SetTop(Shape, Center.Y - Radius);

            Canvas.SetLeft(CenterDot, Center.X - CenterDot.Width / 2);
            Canvas.SetTop(CenterDot, Center.Y - CenterDot.Height / 2);

            var edgePt = new Point(Center.X + Radius, Center.Y);
            Canvas.SetLeft(EdgeDot, edgePt.X - EdgeDot.Width / 2);
            Canvas.SetTop(EdgeDot, edgePt.Y - EdgeDot.Height / 2);
        }
    }

    /// <summary>一次 BGA 空隙测量组（1个焊球 + N个气泡 + 标签）</summary>
    public class BgaVoidGroup
    {
        public BgaCircle Ball { get; set; }
        public List<BgaCircle> Voids { get; } = new();
        public TextBlock Label { get; set; }
        public int Index { get; set; }
        public double VoidLimit { get; set; } = 25.0;

        public double VoidRate
        {
            get
            {
                if (Ball == null || Ball.Area < 1) return 0;
                double totalVoid = 0;
                foreach (var v in Voids) totalVoid += v.Area;
                return Math.Clamp(totalVoid / Ball.Area * 100.0, 0, 100);
            }
        }

        public string Classification => VoidRate <= VoidLimit ? "PASS" : "FAIL";

        public void UpdateLabel()
        {
            if (Label == null || Ball == null) return;
            double rate = VoidRate;
            string cls = Classification;
            Label.Text = (Index > 0 ? $"#{Index} " : "") +
                $"Void: {rate:F1}% | Limit: {VoidLimit:F1}% | {cls}";
            Label.Foreground = cls == "PASS" ? Brushes.Lime : Brushes.Red;

            Canvas.SetLeft(Label, Ball.Center.X + Ball.Radius + 10);
            Canvas.SetTop(Label, Ball.Center.Y - 10);
            Label.Visibility = Visibility.Visible;
        }

        /// <summary>获取所有 UI 元素</summary>
        public List<UIElement> AllElements
        {
            get
            {
                var list = new List<UIElement>();
                if (Ball != null) { list.Add(Ball.Shape); list.Add(Ball.CenterDot); list.Add(Ball.EdgeDot); }
                foreach (var v in Voids) { list.Add(v.Shape); list.Add(v.CenterDot); list.Add(v.EdgeDot); }
                if (Label != null) list.Add(Label);
                return list;
            }
        }
    }
}