using System;
using System.Collections.Generic;
using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Geometry;
using CadParamPluging.Common;

namespace CadParamPluging.Cad
{
    public static class BlockRawFreeForgeNoRoundHeadDrawer
    {
        public static void Draw(CadContext ctx, ParamBag bag, Point3d center, double scaleFactor = 1.0)
        {
            if (ctx == null) throw new ArgumentNullException(nameof(ctx));
            if (bag == null) throw new ArgumentNullException(nameof(bag));

            var effectiveBag = scaleFactor < 1.0 ? ScaleParamBag(bag, scaleFactor) : bag;

            var db = ctx.Database;
            var tr = ctx.Transaction;

            var prevDb = HostApplicationServices.WorkingDatabase;
            HostApplicationServices.WorkingDatabase = db;
            BlockTableRecord btr;
            try
            {
                var bt = (BlockTable)tr.GetObject(db.BlockTableId, OpenMode.ForRead);
                btr = (BlockTableRecord)tr.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForWrite);
            }
            finally
            {
                HostApplicationServices.WorkingDatabase = prevDb;
            }

            var context = new FeatureDrivenDrawer.DrawingContext
            {
                Ctx = ctx,
                Bag = effectiveBag,
                OriginalBag = bag,
                Center = center,
                DeliveryStatus = "毛料态",
                StructuralFeature = "方体",
                SpecialCondition = "无圆头", // Updated
                ProcessMethod = "自由锻",
                Btr = btr,
                Style = new DrawingStyleManager(db, tr)
            };

            DrawCore(context);
        }

        // COPIED FROM FeatureDrivenDrawer.DrawBlockRawFreeForgeRoundHeadCore AND MODIFIED
        private static void DrawCore(FeatureDrivenDrawer.DrawingContext ctx)
        {
            var bag = ctx.Bag;
            
            // BoxSize1 (Width - 总长度)
            // BoxSize2 (Height - 高度/直径)
            var width = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize1);
            var height = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize2);

            if (!width.HasValue || width.Value <= 0 || !height.HasValue || height.Value <= 0)
            {
                return;
            }

            double H = height.Value;
            double W = width.Value;
            
            // 外轮廓圆弧：高度固定为 H/5 -> 原"有圆头"逻辑
            // 依据用户新需求 (2026-01-29): 黄色部分(圆弧高)是粉色部分(总高H)的1/5
            // double arcHeight = H / 5.0; // OLD Round Head Logic
            
            // 【关键修改点】无圆头模式：圆弧高度为0
            double arcHeight = 0; 

            // 视觉比例：总宽度映射
            double visualTotalW = H * 3.0; // 保持视觉宽高比约 3:1
            
            // 绘图坐标计算 (保持居中)
            double ox = ctx.Center.X - visualTotalW / 2.0;  // 左边界 (圆弧最左端)
            double oy = ctx.Center.Y - H / 2.0;             // 底边

            // 内框边界（从左圆弧弦线到右圆弧弦线）
            // 注意：ox 是圆弧顶点，xInnerLeft 应该是弦线位置
            double xInnerLeft = ox + arcHeight;
            double xInnerRight = ox + visualTotalW - arcHeight;
            double innerWidth = xInnerRight - xInnerLeft;

            // 获取内框圆角参数：优先取 UnspecifiedFilletRadiusMax，如果没有则取 BoxFilletRadiusMax
            var innerFilletParam = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyUnspecifiedFilletRadiusMax);
            if (!innerFilletParam.HasValue || innerFilletParam.Value <= 0)
            {
                innerFilletParam = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxFilletRadiusMax);
            }

            double innerFilletR = innerFilletParam.HasValue && innerFilletParam.Value > 0 
                ? innerFilletParam.Value 
                : 0;

            // 1. 绘制完整锻件外轮廓（方体有圆头 - 白色，大圆弧）
            // 修正：圆弧弦线需向内缩进 innerFilletR，以与锻件圆角起点对齐
            // 【关键修改点】无圆头模式：不需要绘制大圆弧外轮廓，或者绘制一个直角的轮廓。
            // 由于 DrawBoxSideFrame 已经绘制了左右两侧的边框线（含圆角），
            // DrawBoxSectionContourWithFillet 绘制了中间。
            // 它们的合集就是外轮廓。
            // 原代码 DrawBlockRoundHeadOutline 是为了画那个额外的“耳朵”圆弧。
            // 这里我们只需要一个简单的矩形外框作为“外轮廓实体”（如果需要）
            // 或者就像原逻辑一样，如果没有大圆弧，就不画 DrawBlockRoundHeadOutline。
            // 但用户要求“包含尺寸标注和参数标注线都复制过来”，且标注依赖于这些几何位置。
            // 这里我们跳过 DrawBlockRoundHeadOutline，因为那是特定的圆头形状。
            // 如果用户想要最外侧也是封闭的线，SideFrames + SectionContour 其实不完全封闭（中间有重叠线）。
            // 让我们看看原逻辑：DrawBlockRoundHeadOutline 是独立的一圈粗线。
            // 此处我们是否需要一个“无圆头”的外圈粗线？
            // 我们可以仅依靠内部组件，或者画一个大的圆角矩形包围所有。
            // 鉴于 SideFrame 已经画了外侧线，我们这里可能不需要额外的 Outline，
            // UNLESS the user implies "No Round Head" means "Rectangular Head".
            // Let's assume the Side Frames define the shape.
            // DrawBlockRoundHeadOutline(ctx, ox, oy, visualTotalW, H, arcHeight, innerFilletR); // SKIPPED

            // 2. 绘制分段式内框（左、中、右三段）以支持中间剖面区域的独立圆角
            // 中间区域（剖面）作为主体，如果设置了圆角，四个角都应为圆角

            // 计算视觉上的剖面宽度
            // 依据用户需求：尺寸3 (BoxSize3) 对应剖面的宽
            var size3 = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize3);
            double visualSectionWidth;
            
            if (size3.HasValue && size3.Value > 0)
            {
                // 按比例映射：VisualW / PhysicalW
                double scale = visualTotalW / W;
                visualSectionWidth = size3.Value * scale;
                if (visualSectionWidth > innerWidth * 0.95) visualSectionWidth = innerWidth * 0.95;
            }
            else
            {
                visualSectionWidth = innerWidth / 3.0;
            }
            
            // 居中布置剖面
            double sectionOffset = (innerWidth - visualSectionWidth) / 2.0;
            double xSectionLeft = xInnerLeft + sectionOffset;
            double xSectionRight = xSectionLeft + visualSectionWidth;

            // 绘制中间剖面框（带圆角 - 根据需求保留）
            DrawBoxSectionContourWithFillet(ctx, xSectionLeft, xSectionRight, oy, H, innerFilletR);

            // 绘制左侧框线（连接左端圆弧和中间剖面框）
            // 用户需求：
            // 1. 去掉最外侧的圆角 -> filletR 传入 0 
            // 2. 横向闭合：水平线需延伸到中间框圆角结束的地方 (xSectionLeft + innerFilletR) 以实现无缝连接
            // 3. 竖向不闭合：DrawBoxSideFrame 内部不 Closed，且不画连接处的竖线
            DrawBoxSideFrame(ctx, xInnerLeft, xSectionLeft + innerFilletR, oy, H, 0, isLeft: true);

            // 绘制右侧框线
            // 类似的，水平线起点延伸到 (xSectionRight - innerFilletR)
            DrawBoxSideFrame(ctx, xSectionRight - innerFilletR, xInnerRight, oy, H, 0, isLeft: false);

            // 3. 剖面填充 - 只在中间区域
            if (innerFilletR > 0.01)
            {
                DrawRingSectionHatchWithFillet(ctx, xSectionLeft, xSectionRight, oy, H, innerFilletR);
            }
            else
            {
                DrawBlockSectionHatch(ctx, xSectionLeft, xSectionRight, oy, H);
            }

            // 5. 零件轮廓框（黄色双点划线矩形 - 在内框内，与锻件有一定间距）
            var widthPrime = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize1Prime);
            var heightPrime = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize2Prime);
            if (widthPrime.HasValue && widthPrime.Value > 0 && heightPrime.HasValue && heightPrime.Value > 0)
            {
                double partH = heightPrime.Value;
                double partW = widthPrime.Value;
                
                // 计算零件在视觉上的宽度比例
                double partWidthRatio = partW / W;
                double visualPartW = innerWidth * partWidthRatio;
                if (visualPartW > innerWidth) visualPartW = innerWidth * 0.9;
                
                // 零件在锻件内居中
                double partOffsetX = (innerWidth - visualPartW) / 2.0;
                double partOffsetY = (H - partH) / 2.0;
                
                double xPartLeft = xInnerLeft + partOffsetX;
                double yPartBottom = oy + partOffsetY;
                
                DrawBlockPartContour(ctx, xPartLeft, yPartBottom, visualPartW, partH);
            }

            // 6. 宽度标注 (BoxSize1) - 位于底部
            // 标注从锻件最左端到最右端（包括圆头）
            {
                var val = ctx.OriginalBag?.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize1) ?? W;
                var str = ctx.OriginalBag?.GetString(FeatureDrivenDrawer.KeyBoxSize1);
                var tolPlus = ctx.OriginalBag?.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize1TolPlus);
                var tolMinus = ctx.OriginalBag?.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize1TolMinus);
                var tolPlusStr = ctx.OriginalBag?.GetString(FeatureDrivenDrawer.KeyBoxSize1TolPlus);
                var tolMinusStr = ctx.OriginalBag?.GetString(FeatureDrivenDrawer.KeyBoxSize1TolMinus);

                var dimText = BuildDimensionText(FormatDimNumber(val, str), tolPlus, tolMinus, tolPlusStr, tolMinusStr);

                // 添加零件尺寸 (Prime) 到下方，用括号包裹
                var valPrime = ctx.OriginalBag?.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize1Prime);
                if (valPrime.HasValue && valPrime.Value > 0)
                {
                    dimText += $"\\X({FormatDimNumber(valPrime.Value, null)})";
                }

                // 标注点从内框左右边界开始（连接到矩形内框） -  Modify Y to center to ensure extension lines touch the geometry
                double dimOriginY = oy + innerFilletR;
                AddLinearDim(
                    ctx,
                    new Point3d(xInnerLeft, dimOriginY, 0),
                    new Point3d(xInnerRight, dimOriginY, 0),
                    new Point3d((xInnerLeft + xInnerRight) / 2, oy - 25, 0),
                    0,
                    dimText);
            }

            // 7. 高度标注 (BoxSize2) - 位于右侧
            // 标注从锻件顶部到底部
            {
                var val = ctx.OriginalBag?.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize2) ?? H;
                var str = ctx.OriginalBag?.GetString(FeatureDrivenDrawer.KeyBoxSize2);
                var tolPlus = ctx.OriginalBag?.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize2TolPlus);
                var tolMinus = ctx.OriginalBag?.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize2TolMinus);
                var tolPlusStr = ctx.OriginalBag?.GetString(FeatureDrivenDrawer.KeyBoxSize2TolPlus);
                var tolMinusStr = ctx.OriginalBag?.GetString(FeatureDrivenDrawer.KeyBoxSize2TolMinus);

                var dimText = BuildDimensionText(FormatDimNumber(val, str), tolPlus, tolMinus, tolPlusStr, tolMinusStr);

                // 添加零件尺寸 (Prime) 到下方
                var valPrime = ctx.OriginalBag?.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize2Prime);
                if (valPrime.HasValue && valPrime.Value > 0)
                {
                     dimText += $"\\X({FormatDimNumber(valPrime.Value, null)})";
                }

                // 标注从圆弧最外侧开始（避免与圆弧轮廓线重叠）
                double xOuterRight = ox + visualTotalW;
                
                // 修正：由于去掉了最外侧圆角，标注界线起点直接对齐最外侧边界
                double xDimOrigin = xOuterRight;

                AddLinearDim(
                    ctx,
                    new Point3d(xDimOrigin, oy, 0),
                    new Point3d(xDimOrigin, oy + H, 0),
                    new Point3d(xOuterRight + 20, oy + H / 2, 0),
                    90,
                    dimText);
            }

            // 8. 中间矩形宽度标注 (BoxSize3) - 位于上方
            // 对应剖面区域宽度
            {
                var val = ctx.OriginalBag?.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize3) ?? 0;
                var str = ctx.OriginalBag?.GetString(FeatureDrivenDrawer.KeyBoxSize3);
                
                if (val > 0)
                {
                    var tolPlus = ctx.OriginalBag?.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize3TolPlus);
                    var tolMinus = ctx.OriginalBag?.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize3TolMinus);
                    var tolPlusStr = ctx.OriginalBag?.GetString(FeatureDrivenDrawer.KeyBoxSize3TolPlus);
                    var tolMinusStr = ctx.OriginalBag?.GetString(FeatureDrivenDrawer.KeyBoxSize3TolMinus);

                    var dimText = BuildDimensionText(FormatDimNumber(val, str), tolPlus, tolMinus, tolPlusStr, tolMinusStr);

                    // 添加零件尺寸 (Prime) 到下方
                    var valPrime = ctx.OriginalBag?.GetDoubleOrNull(FeatureDrivenDrawer.KeyBoxSize3Prime);
                    if (valPrime.HasValue && valPrime.Value > 0)
                    {
                        dimText += $"\\X({FormatDimNumber(valPrime.Value, null)})";
                    }

                    AddLinearDim(
                        ctx,
                        new Point3d(xSectionLeft, oy + H, 0),
                        new Point3d(xSectionRight, oy + H, 0),
                        new Point3d((xSectionLeft + xSectionRight) / 2, oy + H + 15, 0),
                        0,
                        dimText);
                }
            }

            // 9. 硬度符号 - 从剖面底部引出
            var hardnessVal = bag.GetString(FeatureDrivenDrawer.KeyHardness);
            if (!string.IsNullOrWhiteSpace(hardnessVal))
            {
                double xStart = (xSectionLeft + xSectionRight) / 2.0;
                double yStart = oy;
                DrawHardnessSymbol(ctx, xStart, yStart);
            }

            // 10. 标刻内容引线 - 从剖面顶部引出
            var markingText = bag.GetString(FeatureDrivenDrawer.KeyMarkingContent);
            if (!string.IsNullOrWhiteSpace(markingText))
            {
                double xTarget = (xSectionLeft + xSectionRight) / 2.0;
                double yTarget = oy + H;
                DrawSpecialHBLeaderToTop(ctx, xTarget, yTarget, markingText);
            }
        }

        // =============== HELPERS COPIED FROM FeatureDrivenDrawer AND ADAPTED ===============

        private static void DrawBlockPartContour(FeatureDrivenDrawer.DrawingContext ctx, double x, double y, double width, double height)
        {
            try
            {
                var poly = new Polyline();
                poly.AddVertexAt(0, new Point2d(x, y), 0, 0, 0);
                poly.AddVertexAt(1, new Point2d(x + width, y), 0, 0, 0);
                poly.AddVertexAt(2, new Point2d(x + width, y + height), 0, 0, 0);
                poly.AddVertexAt(3, new Point2d(x, y + height), 0, 0, 0);
                poly.Closed = true;
                
                ctx.Style?.Apply(poly, DrawingStyleManager.Role.PartContour);
                ctx.Btr.AppendEntity(poly);
                ctx.Tr.AddNewlyCreatedDBObject(poly, true);
            }
            catch {}
        }

        private static void DrawBoxSectionContourWithFillet(FeatureDrivenDrawer.DrawingContext ctx, double xLeft, double xRight, double yBottom, double height, double filletR)
        {
            var yTop = yBottom + height;
            var width = xRight - xLeft;
            var maxR = Math.Min(width * 0.5, height * 0.5);
            var r = Math.Min(filletR, maxR);
            
            if (r <= 0.01)
            {
                var poly = new Polyline();
                poly.AddVertexAt(0, new Point2d(xLeft, yBottom), 0, 0, 0);
                poly.AddVertexAt(1, new Point2d(xRight, yBottom), 0, 0, 0);
                poly.AddVertexAt(2, new Point2d(xRight, yTop), 0, 0, 0);
                poly.AddVertexAt(3, new Point2d(xLeft, yTop), 0, 0, 0);
                poly.Closed = true;
                ctx.Style?.Apply(poly, DrawingStyleManager.Role.OutlineBold);
                ctx.Btr.AppendEntity(poly);
                ctx.Tr.AddNewlyCreatedDBObject(poly, true);
                return;
            }

            var bulge = Math.Tan(Math.PI / 8.0);
            var polyFillet = new Polyline();
            
            polyFillet.AddVertexAt(0, new Point2d(xLeft + r, yBottom), 0, 0, 0);
            polyFillet.AddVertexAt(1, new Point2d(xRight - r, yBottom), bulge, 0, 0); 
            polyFillet.AddVertexAt(2, new Point2d(xRight, yBottom + r), 0, 0, 0);
            polyFillet.AddVertexAt(3, new Point2d(xRight, yTop - r), bulge, 0, 0);
            polyFillet.AddVertexAt(4, new Point2d(xRight - r, yTop), 0, 0, 0);
            polyFillet.AddVertexAt(5, new Point2d(xLeft + r, yTop), bulge, 0, 0);
            polyFillet.AddVertexAt(6, new Point2d(xLeft, yTop - r), 0, 0, 0);
            polyFillet.AddVertexAt(7, new Point2d(xLeft, yBottom + r), bulge, 0, 0);
            
            polyFillet.Closed = true;
            ctx.Style?.Apply(polyFillet, DrawingStyleManager.Role.OutlineBold);
            ctx.Btr.AppendEntity(polyFillet);
            ctx.Tr.AddNewlyCreatedDBObject(polyFillet, true);
        }

        private static void DrawBoxSideFrame(FeatureDrivenDrawer.DrawingContext ctx, double xStart, double xEnd, double yBottom, double height, double filletR, bool isLeft)
        {
            var yTop = yBottom + height;
            var width = Math.Abs(xEnd - xStart);
            if (width < 0.1) return;

            var maxR = Math.Min(width * 0.5, height * 0.5);
            var r = Math.Min(filletR, maxR);
            var bulge = -Math.Tan(Math.PI / 8.0); 

            var poly = new Polyline();
            
            // 为了闭合缝隙处理：
            // 中间剖面框 (DrawBoxSectionContourWithFillet) 绘制在 xSectionLeft ~ xSectionRight
            // 左侧框线 DrawBoxSideFrame(..., xInnerLeft, xSectionLeft, ...) 是左边的部分
            // 右侧框线 DrawBoxSideFrame(..., xSectionRight, xInnerRight, ...) 是右边的部分
            //
            // 问题在于：当 SideFrame 的 filletR=0 时，它画的是纯直线矩形。
            // 而中间的 DrawBoxSectionContourWithFillet 依然可能有 innerFilletR > 0，导致它的角是圆的。
            // 当两个矩形拼接时，如果中间那个有圆角，而旁边的是直角，交界处的高度看起来是一样的（yBottom, yTop），理论上应该重合。
            // 但如果中间框的圆角导致其垂直边缩短（圆角起止点变化），而SideFrame只是简单的画到 yTop/yBottom，
            // 它们在垂直方向上是重合的。
            // 
            // 观察截图，缝隙似乎出现在连接处。
            // 中间框 DrawBoxSectionContourWithFillet 在 xLeft, xRight 处的垂直线段是：
            // 左侧: (xLeft, yBottom+r) 到 (xLeft, yTop-r)
            // 右侧: (xRight, yBottom+r) 到 (xRight, yTop-r)
            //
            // SideFrame (以左侧为例, isLeft=true, filletR=0):
            // xEnd 是连接点 (即 xLeft)。
            // 它画的线包含 (xEnd, yTop) -> (xEnd, yBottom)
            //
            // 理论上 (xEnd, yBottom) 和 (xSectionLeft, yBottom+r) 之间有高度差 r，但这部分重叠区域应该由圆弧填补？
            // 不，DrawBoxSectionContourWithFillet 画了完整的闭合回路，包括圆角。
            // SideFrame 画了另一侧。
            // 只要 SideFrame 的垂直边完整覆盖 (yBottom 到 yTop)，就不应该有空隙，除非 SideFrame 的 x 坐标没对上。
            //
            // 另一种可能是：DrawBoxSectionContourWithFillet 的圆角不仅影响y，也影响x？不，圆角是在角内切的。
            //
            // 让我们仔细看 DrawBoxSectionContourWithFillet 的左边线：
            // Vertex 6: (xLeft, yTop - r)
            // Vertex 7: (xLeft, yBottom + r)
            // 这两点之间是直线。
            // 下方圆角从 (xLeft, yBottom+r) 到 (xLeft+r, yBottom)。
            // 这意味着在 xLeft 这一条垂直线上，只有 yBottom+r 到 yTop-r 这一段是有线的。
            // yBottom 到 yBottom+r 这一段是空的（因为线往右弯去画圆角了）。
            //
            // 而 SideFrame (isLeft=true, filletR=0) 在 xEnd (即 xLeft) 处的线是：
            // Vertex 0: (xEnd, yBottom)
            // Vertex ... (最终回到 xEnd, yTop)
            // 如果 SideFrame 是开放的 (Closed=false)，我们来看看它的路径。
            // isLeft=true:
            // P0: (xEnd, yBottom)
            // ... 画左边的框 ...
            // P4: (xEnd, yTop)
            // 它画了两条水平线回到 center，但是没有画连接这两个点的垂直线！
            // 原逻辑可能是依赖中间框来画这条线？
            // 是的，FeatureDrivenDrawer 里的逻辑通常是一块块拼接，共用边如果不画两遍的话。
            // 
            // 修正方案：
            // 无论中间框是否有圆角，SideFrame 作为“框线”，应该把与中间框接触的那条边补上，或者延伸进去。
            // 既然中间框是有圆角的，那么在角的地方，中间框的线是缩进去的。
            // SideFrame 必须画出完整的一条垂直线 (xEnd, yBottom) 到 (xEnd, yTop) 来“封口”，
            // 虽然这会导致与中间框的直线部分重叠，但能盖住圆角留下的空隙。
            //
            // 当前代码 isLeft=true 时：
            // poly.AddVertexAt(0, new Point2d(xEnd, yBottom), 0, 0, 0);
            // ... (往左画) ...
            // poly.AddVertexAt(5, new Point2d(xEnd, yTop), 0, 0, 0);
            // 确实是开口的“C”形。
            // 
            // 我们需要让它闭合，或者至少画上那条连接线。
            // 直接将 poly.Closed 设为 true 即可！
            // 这样 (xEnd, yTop) 会自动连回 (xEnd, yBottom)，形成一个完整的矩形框。
            // 这样右边那条垂直线就会被画出来，填补中间框圆角留下的上下空缺。
            
            if (isLeft)
            {
                // 左侧框：起点在右下 (与中间框接壤处)，顺时针绘制
                // P0: (xEnd, yBottom)
                poly.AddVertexAt(0, new Point2d(xEnd, yBottom), 0, 0, 0);
                if (r > 0.01)
                {
                   poly.AddVertexAt(1, new Point2d(xStart + r, yBottom), bulge, 0, 0);
                   poly.AddVertexAt(2, new Point2d(xStart, yBottom + r), 0, 0, 0);
                   poly.AddVertexAt(3, new Point2d(xStart, yTop - r), bulge, 0, 0);
                   poly.AddVertexAt(4, new Point2d(xStart + r, yTop), 0, 0, 0);
                   poly.AddVertexAt(5, new Point2d(xEnd, yTop), 0, 0, 0);
                }
                else
                {
                   poly.AddVertexAt(1, new Point2d(xStart, yBottom), 0, 0, 0);
                   poly.AddVertexAt(2, new Point2d(xStart, yTop), 0, 0, 0);
                   poly.AddVertexAt(3, new Point2d(xEnd, yTop), 0, 0, 0);
                }
            }
            else
            {
                // 右侧框：起点在左上 (与中间框接壤处)，顺时针绘制
                // P0: (xStart, yTop)
                 poly.AddVertexAt(0, new Point2d(xStart, yTop), 0, 0, 0);
                 if (r > 0.01)
                 {
                    poly.AddVertexAt(1, new Point2d(xEnd - r, yTop), bulge, 0, 0);
                    poly.AddVertexAt(2, new Point2d(xEnd, yTop - r), 0, 0, 0);
                    poly.AddVertexAt(3, new Point2d(xEnd, yBottom + r), bulge, 0, 0);
                    poly.AddVertexAt(4, new Point2d(xEnd - r, yBottom), 0, 0, 0);
                    poly.AddVertexAt(5, new Point2d(xStart, yBottom), 0, 0, 0);
                 }
                 else
                 {
                    poly.AddVertexAt(1, new Point2d(xEnd, yTop), 0, 0, 0);
                    poly.AddVertexAt(2, new Point2d(xEnd, yBottom), 0, 0, 0);
                    poly.AddVertexAt(3, new Point2d(xStart, yBottom), 0, 0, 0);
                 }
            }

            // 关键修正：闭合多段线，确保与中间框接触的垂直边被画出来，消除圆角导致的缝隙
            poly.Closed = true; 

            ctx.Style?.Apply(poly, DrawingStyleManager.Role.OutlineBold);
            ctx.Btr.AppendEntity(poly);
            ctx.Tr.AddNewlyCreatedDBObject(poly, true);
        }

        private static void DrawRingSectionHatchWithFillet(FeatureDrivenDrawer.DrawingContext ctx, double xLeft, double xRight, double yBottom, double height, double filletR)
        {
             try
            {
                var yTop = yBottom + height;
                var width = xRight - xLeft;
                var maxR = Math.Min(width * 0.5, height * 0.5);
                var r = Math.Min(filletR, maxR);
                var bulge = Math.Tan(Math.PI / 8.0);

                var boundary = new Polyline();
                if (r > 0.01)
                {
                    boundary.AddVertexAt(0, new Point2d(xLeft + r, yBottom), 0, 0, 0);
                    boundary.AddVertexAt(1, new Point2d(xRight - r, yBottom), bulge, 0, 0); 
                    boundary.AddVertexAt(2, new Point2d(xRight, yBottom + r), 0, 0, 0);
                    boundary.AddVertexAt(3, new Point2d(xRight, yTop - r), bulge, 0, 0);
                    boundary.AddVertexAt(4, new Point2d(xRight - r, yTop), 0, 0, 0);
                    boundary.AddVertexAt(5, new Point2d(xLeft + r, yTop), bulge, 0, 0);
                    boundary.AddVertexAt(6, new Point2d(xLeft, yTop - r), 0, 0, 0);
                    boundary.AddVertexAt(7, new Point2d(xLeft, yBottom + r), bulge, 0, 0);
                }
                else
                {
                    boundary.AddVertexAt(0, new Point2d(xLeft, yBottom), 0, 0, 0);
                    boundary.AddVertexAt(1, new Point2d(xRight, yBottom), 0, 0, 0);
                    boundary.AddVertexAt(2, new Point2d(xRight, yTop), 0, 0, 0);
                    boundary.AddVertexAt(3, new Point2d(xLeft, yTop), 0, 0, 0);
                }
                boundary.Closed = true;

                ctx.Btr.AppendEntity(boundary);
                ctx.Tr.AddNewlyCreatedDBObject(boundary, true);

                var hatch = new Hatch();
                hatch.SetDatabaseDefaults();
                hatch.Normal = new Vector3d(0, 0, 1);
                hatch.Elevation = 0.0;

                ctx.Btr.AppendEntity(hatch);
                ctx.Tr.AddNewlyCreatedDBObject(hatch, true);

                hatch.SetHatchPattern(HatchPatternType.PreDefined, "ANSI31");
                hatch.PatternScale = 10;
                hatch.PatternAngle = 0;
                hatch.Associative = false;
                ctx.Style?.Apply(hatch, DrawingStyleManager.Role.Hatch);

                var ids = new ObjectIdCollection();
                ids.Add(boundary.ObjectId);
                hatch.AppendLoop(HatchLoopTypes.External, ids);
                hatch.EvaluateHatch(true);

                boundary.Erase(true);
            }
            catch {}
        }

        private static void DrawBlockSectionHatch(FeatureDrivenDrawer.DrawingContext ctx, double xLeft, double xRight, double yBottom, double height)
        {
             DrawRingSectionHatchWithFillet(ctx, xLeft, xRight, yBottom, height, 0);
        }

        private static ParamBag ScaleParamBag(ParamBag original, double scaleFactor)
        {
            if (original == null) return null;
            if (Math.Abs(scaleFactor - 1.0) < 0.000001) return original;

            var newBag = new ParamBag();
            
            var scaleKeys = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
            {
                FeatureDrivenDrawer.KeyBoxSize1,
                FeatureDrivenDrawer.KeyBoxSize2,
                FeatureDrivenDrawer.KeyBoxSize3,
                FeatureDrivenDrawer.KeyBoxSize1TolPlus, 
                FeatureDrivenDrawer.KeyBoxSize1TolMinus,
                FeatureDrivenDrawer.KeyBoxSize2TolPlus, 
                FeatureDrivenDrawer.KeyBoxSize2TolMinus,
                FeatureDrivenDrawer.KeyBoxSize3TolPlus, 
                FeatureDrivenDrawer.KeyBoxSize3TolMinus,
                FeatureDrivenDrawer.KeyBoxFilletRadiusMax,
                FeatureDrivenDrawer.KeyUnspecifiedFilletRadiusMax,
                FeatureDrivenDrawer.KeyBoxSize1Prime,
                FeatureDrivenDrawer.KeyBoxSize2Prime,
                FeatureDrivenDrawer.KeyBoxSize3Prime
            };

            foreach (var key in original.GetKeys())
            {
                var strVal = original.GetString(key);
                
                if (scaleKeys.Contains(key) && double.TryParse(strVal, out var val))
                {
                    newBag.Set(key, (val * scaleFactor).ToString("0.###"));
                }
                else
                {
                    newBag.Set(key, strVal);
                }
            }
            return newBag;
        }

        private static void AddLinearDim(FeatureDrivenDrawer.DrawingContext ctx, Point3d p1, Point3d p2, Point3d ptDim, double rot, string text)
        {
             try
            {
                var dim = new RotatedDimension();
                dim.SetDatabaseDefaults();
                dim.XLine1Point = p1;
                dim.XLine2Point = p2;
                dim.DimLinePoint = ptDim;
                dim.Rotation = rot * Math.PI / 180.0;
                dim.DimensionStyle = ctx.Db.Dimstyle;
                dim.DimensionText = text;
                
                // Color Index 3 = Green
                dim.ColorIndex = 3; 

                // --- 强制应用覆盖属性以确保显示效果 ---
                
                // 颜色覆盖：尺寸线、尺寸界线、文字全部强制绿色
                // Dimclrd: Dimension line color
                // Dimclre: Extension line color
                // Dimclrt: Text color
                // 3 = Green
                SetDimColor(dim, "Dimclrd", 3);
                SetDimColor(dim, "Dimclre", 3);
                SetDimColor(dim, "Dimclrt", 3);

                // 强制绘制尺寸线即使文字在界线外 (Dimtofl = true)
                SetDimBool(dim, "Dimtofl", true);

                // 文字/箭头最佳调整 (Dimatfit = 3: Best fit)
                SetDimInt(dim, "Dimatfit", 3);

                // 文字垂直位置 (Dimtad = 1: Above dimension line)
                SetDimInt(dim, "Dimtad", 1);

                // 文字水平对齐 (Dimtih = false: Aligned with dimension line, not horizontal)
                SetDimBool(dim, "Dimtih", false);
                SetDimBool(dim, "Dimtoh", false);

                // 尺寸参数微调
                SetDimDouble(dim, "Dimtxt", 3.5); // 文字高度
                SetDimDouble(dim, "Dimasz", 2.5); // 箭头大小
                SetDimDouble(dim, "Dimgap", 1.0); // 文字偏移
                SetDimDouble(dim, "Dimexe", 1.0); // 延伸超出量
                SetDimDouble(dim, "Dimexo", 0.0); // 原点偏移

                ctx.Style?.Apply(dim, DrawingStyleManager.Role.Dimension);
                
                // 再次确保 Entity 颜色为绿色
                dim.ColorIndex = 3;

                ctx.Btr.AppendEntity(dim);
                ctx.Tr.AddNewlyCreatedDBObject(dim, true);
                
                // 尝试重计算以刷新显示块
                try { dim.RecomputeDimensionBlock(true); } catch {}
            }
            catch {}
        }

        // 辅助反射设置方法 (Copy from FeatureDrivenDrawer to avoid dependency issues or access restrictions)
        
        private static void SetDimColor(Dimension dim, string prop, int colorIndex)
        {
            try 
            {
                // Property type for color override is usually Autodesk.AutoCAD.Colors.Color
                // But specifically for Dimclrd/e/t properties on the object wrapper, they might be exposed as Color objects.
                // However, standard COM/ActiveX way involves variables. In .NET API, we usually set Dim Variables on the Database or style.
                // BUT, effectively, we can set overrides on the Dimension entity itself if it supports the property via reflection 
                // typically mirroring the system variable names.
                // Let's rely on the property reflection if available, but for color, it's tricky.
                // The most robust way using .NET API for dimension overrides is strictly through the properties if exposed, 
                // OR modifying the XData/Dxf codes.
                //
                // WAIT. FeatureDrivenDrawer uses TrySetDimProp with reflection. Let's replicate that simple logic.
                // Note: Dimension class properties in .NET don't map 1:1 to DIM vars (e.g. Dimclrd is not a property of Dimension).
                // They are properties of DimensionStyle. To override on an instance, we strictly need to simple properties if they exist?
                // Actually, the previous code used reflection on 'dim' object. 
                // Let's double check if "Dimclrd" exists on RotatedDimension. It usually doesn't.
                // It holds "DimColor" maybe? No.
                // 
                // Re-reading FeatureDrivenDrawer.TrySetDimProp ...
                // It sets properties via reflection.
                // Let's implement a safer version: using dynamic if possible, or just standard properties.
                
                // Actually, correct way to override dim var on an entity is NOT via properties (they don't exist), 
                // but by creating a DimStyle override or setting specific properties like DimensionText.
                // HOWEVER, RotatedDimension DOES have properties like 'Dimclrd' EXPOSED dynamically in some contexts? 
                // No, standard .NET API does not expose 'Dimclrd' as a property on RotatedDimension.
                // 
                // Wait, FeatureDrivenDrawer code shown in Step 182 DOES NOT show TrySetDimProp setting 'Dimclrd'.
                // Step 200 shows TryApplyDimSizeOverrides calling TrySetDimProp(dim, "Dimclrd", 3).
                // This implies that at runtime, the Dimension object (or a wrapper) HAS these properties?
                // OR, the User's environment has an extension method?
                // OR, FeatureDrivenDrawer.TrySetDimProp handles it magic?
                // Let's look at FeatureDrivenDrawer.TrySetDimProp in Step 182.
                // It does `obj.GetType().GetProperty(propName)`.
                // If this works, then RotatedDimension must have these properties.
                // Let's assume they exist as per the working example in FeatureDrivenDrawer.
                
                var p = dim.GetType().GetProperty(prop);
                if (p != null && p.CanWrite)
                {
                     if (p.PropertyType == typeof(Autodesk.AutoCAD.Colors.Color))
                     {
                         p.SetValue(dim, Autodesk.AutoCAD.Colors.Color.FromColorIndex(Autodesk.AutoCAD.Colors.ColorMethod.ByAci, (short)colorIndex), null);
                     }
                     else if (p.PropertyType == typeof(int))
                     {
                         p.SetValue(dim, colorIndex, null);
                     }
                }
            } 
            catch {}
        }

        private static void SetDimBool(Dimension dim, string prop, bool val)
        {
            try { dim.GetType().GetProperty(prop)?.SetValue(dim, val, null); } catch {}
        }
        
        private static void SetDimDouble(Dimension dim, string prop, double val)
        {
            try { dim.GetType().GetProperty(prop)?.SetValue(dim, val, null); } catch {}
        }

        private static void SetDimInt(Dimension dim, string prop, int val)
        {
            try { dim.GetType().GetProperty(prop)?.SetValue(dim, val, null); } catch {}
        }
        
        private static string FormatDimNumber(double value, string rawInput = null)
        {
            try
            {
                // If rawInput is provided and matches the value, use its precision
                if (!string.IsNullOrWhiteSpace(rawInput) && double.TryParse(rawInput, out var d) && Math.Abs(d - value) < 0.000001)
                {
                    int decIndex = rawInput.IndexOf('.');
                    int decimals = 0;
                    if (decIndex >= 0)
                    {
                        decimals = rawInput.Length - decIndex - 1;
                    }
                    if (decimals == 0) return value.ToString("0");
                    return value.ToString("0." + new string('0', decimals));
                }

                // Fallback: auto-detect from value (strip trailing zeros)
                string str = value.ToString("0.##########"); 
                int decimalIndex = str.IndexOf('.');
                if (decimalIndex < 0)
                {
                    return str; // Integer, no decimal
                }

                int autoDecimals = str.Length - decimalIndex - 1;
                
                if (autoDecimals == 0) return str;
                
                string format = "0." + new string('0', autoDecimals);
                return value.ToString(format);
            }
            catch
            {
                return value.ToString();
            }
        }

        private static string BuildDimensionText(string baseText, double? tolPlus, double? tolMinus, string tolPlusStr = null, string tolMinusStr = null)
        {
            if (!tolPlus.HasValue && !tolMinus.HasValue)
            {
                return baseText;
            }

            bool isSymmetrical = false;
            if (tolPlus.HasValue && tolMinus.HasValue)
            {
                if (Math.Abs(Math.Abs(tolPlus.Value) - Math.Abs(tolMinus.Value)) < 0.000001)
                {
                    isSymmetrical = true;
                }
            }

            if (isSymmetrical)
            {
                var val = Math.Abs(tolPlus.Value);
                return $"{baseText}%%p{FormatDimNumber(val, tolPlusStr)}";
            }

            const double tolScale = 0.7;
            var plusStr = string.Empty;
            var minusStr = string.Empty;

            if (tolPlus.HasValue)
            {
                plusStr = tolPlus.Value >= 0
                    ? $"+{FormatDimNumber(tolPlus.Value, tolPlusStr)}"
                    : $"{FormatDimNumber(tolPlus.Value, tolPlusStr)}";
            }

            if (tolMinus.HasValue)
            {
                double vm = tolMinus.Value;
                string formattedVal = FormatDimNumber(Math.Abs(vm), tolMinusStr);

                if (Math.Abs(vm) < 0.000001)
                {
                     minusStr = formattedVal;
                }
                else
                {
                    minusStr = $"-{formattedVal}";
                }
            }

            if (tolPlus.HasValue && tolMinus.HasValue)
            {
                return $"{baseText} {{\\H{tolScale}x;\\S{plusStr}^{minusStr};}}";
            }

            var single = tolPlus.HasValue ? plusStr : minusStr;
            return $"{baseText} {{\\H{tolScale}x;{single}}}";
        }

        private static void DrawHardnessSymbol(FeatureDrivenDrawer.DrawingContext ctx, double xStart, double yStart)
        {
             try
            {
                var p1 = new Point3d(xStart, yStart, 0);
                var p2 = new Point3d(xStart + 15, yStart - 15, 0);
                var p3 = new Point3d(p2.X + 10, p2.Y, 0); 

                var poly = new Polyline();
                poly.AddVertexAt(0, new Point2d(p1.X, p1.Y), 0, 0, 0);
                poly.AddVertexAt(1, new Point2d(p2.X, p2.Y), 0, 0, 0);
                poly.AddVertexAt(2, new Point2d(p3.X, p3.Y), 0, 0, 0);
                
                ctx.Style?.Apply(poly, DrawingStyleManager.Role.Dimension);
                poly.ColorIndex = 3; 

                ctx.Btr.AppendEntity(poly);
                ctx.Tr.AddNewlyCreatedDBObject(poly, true);

                double radius = 4.0;
                var center = new Point3d(p3.X + radius, p3.Y, 0);
                var circle = new Circle(center, Vector3d.ZAxis, radius);
                circle.ColorIndex = 3;
                
                ctx.Btr.AppendEntity(circle);
                ctx.Tr.AddNewlyCreatedDBObject(circle, true);

                var text = new DBText();
                text.TextString = "HB";
                text.Height = 3.5;
                text.ColorIndex = 3;
                text.HorizontalMode = TextHorizontalMode.TextCenter;
                text.VerticalMode = TextVerticalMode.TextVerticalMid;
                text.AlignmentPoint = center;
                text.Position = center;

                ctx.Btr.AppendEntity(text);
                ctx.Tr.AddNewlyCreatedDBObject(text, true);
            }
            catch {}
        }

        private static void DrawSpecialHBLeaderToTop(FeatureDrivenDrawer.DrawingContext ctx, double xTarget, double yTarget, string textContent)
        {
            try
            {
                var p1 = new Point3d(xTarget, yTarget, 0);
                var p2 = new Point3d(xTarget - 10, yTarget + 10, 0);
                
                double textLen = (string.IsNullOrEmpty(textContent) ? 10 : textContent.Length) * 2.5; 
                if (textLen < 20) textLen = 20;

                var p3 = new Point3d(p2.X - textLen, p2.Y, 0);

                var leader = new Leader();
                leader.SetDatabaseDefaults();
                leader.AppendVertex(p1);
                leader.AppendVertex(p2);
                leader.AppendVertex(p3);
                leader.HasArrowHead = true;
                leader.ColorIndex = 7;
                leader.Layer = "0";

                ctx.Btr.AppendEntity(leader);
                ctx.Tr.AddNewlyCreatedDBObject(leader, true);

                var text = new DBText();
                text.TextString = textContent;
                text.Height = 3.5;
                text.ColorIndex = 7;
                text.Layer = "0";
                
                text.HorizontalMode = TextHorizontalMode.TextLeft;
                text.VerticalMode = TextVerticalMode.TextBottom;
                text.AlignmentPoint = new Point3d(p3.X, p3.Y + 1.0, 0);
                text.Position = text.AlignmentPoint;

                ctx.Btr.AppendEntity(text);
                ctx.Tr.AddNewlyCreatedDBObject(text, true);
            }
            catch {}
        }
    }
}