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

namespace CadParamPluging.Cad.Drawers
{
    public static class RingRawFreeForgeNonCenterPunchDrawer
    {
        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));

            // Apply scaling
            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;
            }

            // Construct DrawingContext
            // Note: SpecialCondition needs to NOT contain "中心冲孔"
            var context = new FeatureDrivenDrawer.DrawingContext
            {
                Ctx = ctx,
                Bag = effectiveBag,
                OriginalBag = bag,
                Center = center,
                DeliveryStatus = "毛料态",
                StructuralFeature = "环形",
                SpecialCondition = "非中心冲孔", 
                ProcessMethod = "自由锻",
                Btr = btr,
                // We need to instantiate DrawingStyleManager. Accessing internal constructor via reflection or if it's internal to assembly we are fine.
                // Assuming same assembly.
                Style = new DrawingStyleManager(db, tr)
            };

            DrawCore(context);
        }

        private static ParamBag ScaleParamBag(ParamBag original, double scaleFactor)
        {
            if (original == null || scaleFactor <= 0 || (Math.Abs(scaleFactor - 1.0) < 1e-6))
            {
                return original;
            }

            var scaled = new ParamBag();

            // 需要缩放的尺寸参数Key列表
            var sizeKeys = new System.Collections.Generic.HashSet<string>(StringComparer.OrdinalIgnoreCase)
            {
                // 环形参数
                FeatureDrivenDrawer.KeyOuterDiameter1, FeatureDrivenDrawer.KeyInnerDiameter2, FeatureDrivenDrawer.KeyHeight1,
                FeatureDrivenDrawer.KeyOuterDiameter1Prime, FeatureDrivenDrawer.KeyInnerDiameter2Prime, FeatureDrivenDrawer.KeyHeight1Prime,
                FeatureDrivenDrawer.KeyMinWallThickness,
                // 圆角参数
                FeatureDrivenDrawer.KeyUnspecifiedFilletRadiusMax, FeatureDrivenDrawer.KeyInnerRadiusMax,
                
                // 包含公差参数以保持一致性
                FeatureDrivenDrawer.KeyOuterDiameter1TolPlus, FeatureDrivenDrawer.KeyOuterDiameter1TolMinus,
                FeatureDrivenDrawer.KeyInnerDiameter2TolPlus, FeatureDrivenDrawer.KeyInnerDiameter2TolMinus,
                FeatureDrivenDrawer.KeyHeight1TolPlus, FeatureDrivenDrawer.KeyHeight1TolMinus
            };

            foreach (var key in original.GetKeys())
            {
                var value = original.GetString(key);

                if (sizeKeys.Contains(key))
                {
                    // 尝试解析为数值并缩放
                    if (double.TryParse(value, out var numValue))
                    {
                        var scaledValue = numValue * scaleFactor;
                        // 保留适当的小数位数，避免精度问题
                        scaled.Set(key, scaledValue.ToString("F4"));
                    }
                    else
                    {
                        scaled.Set(key, value);
                    }
                }
                else
                {
                    // 非尺寸参数直接复制
                    scaled.Set(key, value);
                }
            }

            return scaled;
        }

        private static void DrawCore(FeatureDrivenDrawer.DrawingContext ctx)
        {
            // Logic copied from FeatureDrivenDrawer.DrawRingFeaturesFull but tailored for NonCenterPunch
            var bag = ctx.Bag;
            var outerDia = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyOuterDiameter1);
            var height = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyHeight1);

            if (!outerDia.HasValue || !height.HasValue) return;

            double W = outerDia.Value;
            double H = height.Value;
            double ox = ctx.Center.X - W / 2.0;
            double oy = ctx.Center.Y - H / 2.0;

            // Unconditionally retrieve variables for Part Contour (Prime parameters)
            // This ensures the yellow part contour is drawn if parameters exist, regardless of status.
            var outerDiaPrime = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyOuterDiameter1Prime);
            var innerDiaPrime = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyInnerDiameter2Prime);
            var heightPrime = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyHeight1Prime);
            
            /*
            if (ctx.IsMachined)
            {
                // Previously, these were only loaded if IsMachined was true.
            }
            */

            // 1. Forging Section Contours (Replacing generic outer contour)
            var sectionFilletR = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyUnspecifiedFilletRadiusMax) ?? 0;

            // Pre-calculate inner hole parameters
            var innerDia = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyInnerDiameter2);
            var innerTolPlus = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyInnerDiameter2TolPlus);
            var innerTolMinus = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyInnerDiameter2TolMinus);
            double? xInnerLeft = null;
            double? xInnerRight = null;

            // Full Section: Draw Contour with Fillet for both sides
            if (innerDia.HasValue && innerDia.Value > 0 && innerDia.Value < W)
            {
                 // Do NOT draw sharp ForgingOuterContour, as it conflicts with rounded fillets.
                 // FeatureDrivenDrawer.DrawForgingOuterContour(ctx, ox, oy, W, H);

                 double xInnerLeftVal = ctx.Center.X - innerDia.Value / 2.0;
                 double xInnerRightVal = ctx.Center.X + innerDia.Value / 2.0;

                 // Draw Left Section Contour
                 FeatureDrivenDrawer.DrawRingSectionContourWithFillet(ctx, ox, xInnerLeftVal, oy, H, sectionFilletR);
                 // Draw Left Hatch (with fillet)
                 FeatureDrivenDrawer.DrawRingSectionHatchWithFillet(ctx, ox, xInnerLeftVal, oy, H, sectionFilletR);

                 // Draw Right Section Contour
                 FeatureDrivenDrawer.DrawRingSectionContourWithFillet(ctx, xInnerRightVal, ox + W, oy, H, sectionFilletR);
                 // Draw Right Hatch (with fillet)
                 FeatureDrivenDrawer.DrawRingSectionHatchWithFillet(ctx, xInnerRightVal, ox + W, oy, H, sectionFilletR);

                 // Draw Connecting Lines (Hole Back View) - Top and Bottom
                 // Extend into the fillet radius to connect with the flat top/bottom of the sections
                 
                 double lineStart = xInnerLeftVal - sectionFilletR;
                 double lineEnd = xInnerRightVal + sectionFilletR;

                 var connectingLineTop = new Line(new Point3d(lineStart, oy + H, 0), new Point3d(lineEnd, oy + H, 0));
                 ctx.Style?.Apply(connectingLineTop, DrawingStyleManager.Role.OutlineBold);
                 ctx.Btr.AppendEntity(connectingLineTop);
                 ctx.Tr.AddNewlyCreatedDBObject(connectingLineTop, true);

                 var connectingLineBottom = new Line(new Point3d(lineStart, oy, 0), new Point3d(lineEnd, oy, 0));
                 ctx.Style?.Apply(connectingLineBottom, DrawingStyleManager.Role.OutlineBold);
                 ctx.Btr.AppendEntity(connectingLineBottom);
                 ctx.Tr.AddNewlyCreatedDBObject(connectingLineBottom, true);

                 // Adjust Inner Dim to attach to vertical wall (offset by r)
                 FeatureDrivenDrawer.DrawInnerDiameterDimension(ctx, xInnerLeftVal, xInnerRightVal, oy + sectionFilletR, innerDia.Value, innerTolPlus, innerTolMinus, innerDiaPrime);
                 
                 // Store values for later use in dimensions/notes
                 xInnerRight = xInnerRightVal;
                 xInnerLeft = xInnerLeftVal;
            }
            else
            {
                // Fallback if no inner hole (should not happen for a ring but safe to keep)
                // FeatureDrivenDrawer.DrawForgingOuterContour(ctx, ox, oy, W, H);
            }

            // 1.1 Centerline
            // 改为竖直中心线，两头超出3mm
            var cx = ctx.Center.X;
            var vLine = new Line(new Point3d(cx, oy - 3, 0), new Point3d(cx, oy + H + 3, 0));
            ctx.Style?.Apply(vLine, DrawingStyleManager.Role.Centerline);
            ctx.Btr.AppendEntity(vLine);
            ctx.Tr.AddNewlyCreatedDBObject(vLine, true);

            // 2. Outer Diameter Dimension
            var outerTolPlus = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyOuterDiameter1TolPlus);
            var outerTolMinus = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyOuterDiameter1TolMinus);
            // Adjust Y by fillet radius so dimension lines attach to the vertical wall, not the rounded corner gap
            FeatureDrivenDrawer.DrawOuterDiameterDimension(ctx, ox, oy + sectionFilletR, W, W, outerTolPlus, outerTolMinus, outerDiaPrime);

            // 3. Inner Hole Block (REMOVED - now handled above)
            /*
            // declared and handled above
            */

            // 5. Height Dimension
            // Fix: Use OriginalBag for dimension text so it shows the real value (e.g. 43) not the scaled value (e.g. 12.28)
            var displayBag = ctx.OriginalBag ?? ctx.Bag;
            
            var displayHeightVal = displayBag.GetDoubleOrNull(FeatureDrivenDrawer.KeyHeight1) ?? H;
            var displayHeightStr = displayBag.GetString(FeatureDrivenDrawer.KeyHeight1);
            
            var heightTolPlus = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyHeight1TolPlus); // Tolerances are usually absolute or percentage? Assuming absolute, they might need scaling or not? 
            // Wait, if tolerances are absolute values in mm (like ±0.5), they should NOT be scaled in the text.
            // But they ARE scaled in the effective bag if they were in the sizeKeys list.
            // Let's check sizeKeys... Yes, TolPlus/TolMinus are in sizeKeys.
            // So if we used the scaled bag's tolerance for TEXT, it would be ±0.14. The screenshot shows ±0.1429. The User input is 0.5.
            // So we MUST use OriginalBag for Tolerances as well for the text.
            
            var displayTolPlus = displayBag.GetDoubleOrNull(FeatureDrivenDrawer.KeyHeight1TolPlus);
            var displayTolMinus = displayBag.GetDoubleOrNull(FeatureDrivenDrawer.KeyHeight1TolMinus);
            var displayTolPlusStr = displayBag.GetString(FeatureDrivenDrawer.KeyHeight1TolPlus);
            var displayTolMinusStr = displayBag.GetString(FeatureDrivenDrawer.KeyHeight1TolMinus);
            
            var displayHeightPrime = displayBag.GetDoubleOrNull(FeatureDrivenDrawer.KeyHeight1Prime);

            var heightBaseText = FeatureDrivenDrawer.BuildDimensionText(FeatureDrivenDrawer.FormatDimNumber(displayHeightVal, displayHeightStr), displayTolPlus, displayTolMinus, displayTolPlusStr, displayTolMinusStr);
            var heightDimText = heightBaseText;
            
            if (displayHeightPrime.HasValue && displayHeightPrime.Value > 0)
            {
                 heightDimText = heightBaseText + $"\\X({FeatureDrivenDrawer.FormatDimNumber(displayHeightPrime.Value)})";
            }

            // Custom Height Dimension Logic to ensure "Closed" look with fillets
            // Move X definition points inward by fillet radius so extension lines start from the flat face
            double dimX = ox + W - sectionFilletR;
            
            FeatureDrivenDrawer.AddLinearDim(
                ctx,
                new Point3d(dimX, oy, 0),
                new Point3d(dimX, oy + H, 0),
                new Point3d(ox + W + 25, oy + H / 2, 0),
                90,
                heightDimText);

            // 6. Unspecified Fillet Note - User requested to remove this
            /*
            var unspecifiedFillet = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyUnspecifiedFilletRadiusMax);
            if (unspecifiedFillet.HasValue && unspecifiedFillet.Value > 0)
            {
                FeatureDrivenDrawer.DrawUnspecifiedFilletNote(ctx, ox, oy, H, W, unspecifiedFillet.Value);
            }
            */

            // 7. Min Wall Thickness
            var minWallThickness = bag.GetDoubleOrNull(FeatureDrivenDrawer.KeyMinWallThickness);
            if (minWallThickness.HasValue && minWallThickness.Value > 0)
            {
                if (xInnerRight.HasValue)
                {
                    var val = ctx.OriginalBag?.GetDoubleOrNull(FeatureDrivenDrawer.KeyMinWallThickness) ?? minWallThickness.Value;
                    var dimText = $"{FeatureDrivenDrawer.FormatDimNumber(val)}min";
                    FeatureDrivenDrawer.AddLinearDim(
                        ctx,
                        new Point3d(xInnerRight.Value, oy + sectionFilletR, 0),
                        new Point3d(ox + W, oy + sectionFilletR, 0),
                        new Point3d((xInnerRight.Value + ox + W) / 2, oy + sectionFilletR - 25, 0),
                        0,
                        dimText);
                }
            }

            // 8. Part Contour (Machined Parameters present)
            // Even if status is "Raw", if parameters exist, we draw the part contour as requested.
            if (outerDiaPrime.HasValue && outerDiaPrime.Value > 0 && heightPrime.HasValue && heightPrime.Value > 0)
            {
                FeatureDrivenDrawer.DrawPartContour(ctx, ctx.Center, outerDiaPrime.Value, innerDiaPrime, heightPrime.Value);
            }

            // 9. Hardness Symbol
            var hardnessVal = bag.GetString(FeatureDrivenDrawer.KeyHardness);
            if (!string.IsNullOrWhiteSpace(hardnessVal) && hardnessVal != "空")
            {
                 if (xInnerRight.HasValue)
                {
                    double xStart = (xInnerRight.Value + ox + W) / 2.0;
                    double yStart = oy;
                    FeatureDrivenDrawer.DrawHardnessSymbol(ctx, xStart, yStart, hardnessVal);
                }
                else
                {
                     FeatureDrivenDrawer.DrawHardnessSymbol(ctx, ox + W / 2.0, oy, hardnessVal);
                }
            }

            // 10. Marking Content
            var markingText = bag.GetString(FeatureDrivenDrawer.KeyMarkingContent);
            if (!string.IsNullOrWhiteSpace(markingText))
            {
                 if (xInnerRight.HasValue)
                {
                    double xTarget = (xInnerRight.Value + ox + W) / 2.0;
                    double yTarget = oy + H;
                    FeatureDrivenDrawer.DrawSpecialHBLeaderToTop(ctx, xTarget, yTarget, markingText);
                }
                else
                {
                     FeatureDrivenDrawer.DrawSpecialHBLeaderToTop(ctx, ox + W / 2.0, oy + H, markingText);
                }
            }
        }
    }
}