using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Net;
using System.Reflection;
using System.Text;
using System.Windows;

using Bentley.DgnPlatform;
using Bentley.DgnPlatformNET;
using Bentley.DgnPlatformNET.Elements;
using Bentley.GeometryNET;
using Bentley.MstnPlatformNET;

using Microsoft.Win32;



namespace RingPlacementAddin
{
    public class Commands
    {
        public static void PlaceRings(string unparsed)
        {
            OpenFileDialog dialog = new OpenFileDialog()
            {
                Filter = "管环定位配置 (*.json)|*.json",
                Title = "打开文件",
            };
            if (dialog.ShowDialog() == true)
            {
                var jsonFilePath = dialog.FileName;
                try
                {
                    RingData data = RingInfoReader.Read(jsonFilePath);
                    var dir = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
                    var cellPath = Path.Combine(dir, "Cell", "Ring.cel");
                    if (!File.Exists(cellPath))
                    {
                        MessageBox.Show($"单元库文件不存在：{cellPath}", "错误", MessageBoxButton.OK, MessageBoxImage.Error);
                        return;
                    }
                    //DTransform3d trans = DTransform3d.Identity;
                    //trans.Translation = new DVector3d(100000, 200000, 300000);
                    //var ts = DTransform3d.Rotation(DVector3d.FromXYZ(1000, 0, 0), Angle.PI * 0.25);
                    //var ts1 = DTransform3d.Multiply(ts, trans);
                    //var matrix3d = ts1.Matrix;
                    //var de = matrix3d.Determinant();
                    //var rigid = matrix3d.IsRigid();//刚性
                    //var diagonal = matrix3d.IsDiagonal();//对角线
                    //var orthogonal = matrix3d.IsOrthogonal();//正交
                    //var uniform = matrix3d.IsUniformScale(out var max);
                    //var rigidWithScale = matrix3d.IsRigidWithScale(out var maxtric, out var s);
                    double ringWidth = 1.2; //管片宽度，单位米
                    double uorMeter = Session.Instance.GetActiveDgnModel().GetModelInfo().UorPerMeter;
                    Dictionary<string, object> parameters = new()
                    {
                            { "管片宽度",  ringWidth}, //转换为米
                    };
                    //CellHelpers.ImportParametricCellElement(cellPath, "管环", ts1);
                    //return;

                    var dgnModel = Session.Instance.GetActiveDgnModel();//获取当前激活的model
                    var points = data.Rings.Select(r => r.Transform3d.Translation).ToArray();
                    //foreach (var p in points)
                    //{
                    //    DSegment3d segment = new(p, p);
                    //    //创建直线元素
                    //    var line = new LineElement(dgnModel, null, segment);
                    //    line.AddToModel();
                    //}
                    foreach (var ring in data.Rings)
                    {
                        CellHelper.ImportParametricCellElement(cellPath, "管环", ring.Transform3d, parameters);
                    }
                    var mSBsplineCurve = MSBsplineCurve.CreateFromPoints(points);
                    CurvePrimitive curvePrimitive = CurvePrimitive.CreateBsplineCurve(mSBsplineCurve);// 使用CurvePrimitive下的静态方法CreateBsplineCurve

                    Element targetCurve = DraftingElementSchema.ToElement(dgnModel, curvePrimitive, null); //将CurvePrimitive转为Element， 持久化到model中
                    targetCurve.AddToModel();

                    //return;
                    var uor = Session.Instance.GetActiveDgnModel().GetModelInfo().UorPerMeter;
                    CurveVector curveVector = CurvePathQuery.ElementToCurveVector(targetCurve);
                    var locs = points.Select(curveVector.ClosestPointBoundedXY);
                    var ordered = locs.OrderBy(curveVector.CurveLocationDetailIndex).ThenBy(loc => loc.Fraction).ToList();
                    StringBuilder sb = new StringBuilder();
                    //var pcs = new List<ParametricCellElement>();
                    foreach (var detail in ordered)
                    {
                        sb.AppendLine($"Fraction:{detail.Fraction},ComponentFraction:{detail.ComponentFraction}");
                    }
                    //MessageBox.Show(sb.ToString());

                    curvePrimitive.Length(out var length);
                    var additionPoints = new List<DPoint3d>();
                    for (int i = 0; i < ordered.Count - 1; i++)
                    {
                        curvePrimitive.SignedDistanceBetweenFractions(ordered[i].Fraction, ordered[i + 1].Fraction, out double distance);
                        var count = Math.Floor(distance / (uor * ringWidth));

                        if (count >= 2)
                        {
                            for (int j = 0; j < count - 1; j++)
                            {
                                //var fraction = ordered[i].Fraction + (j + 1) * (uor * ringWidth) / length;
                                //curvePrimitive.SignedDistanceBetweenFractions(ordered[i].Fraction, fraction, out double dis);
                                var detail = curvePrimitive.PointAtSignedDistanceFromFraction(
                                      ordered[i].Fraction,
                                      (j + 1) * (uor * ringWidth),
                                      false);

                                //curvePrimitive.FractionToPoint(fraction, out var point);
                                //DTransform3d transform = DTransform3d.Translation(point);
                                //curvePrimitive.FractionToFrenetFrame(fraction, out var transform);
                                curvePrimitive.FractionToPoint(detail.Fraction, out var point, out var tangent);
                                var identity = DTransform3d.Identity;
                                identity.Translation = point;
                                //additionPoints.Add(point);

                                var xAxis = -tangent.CrossProduct(DVector3d.UnitZ);
                                var zAxis = xAxis.CrossProduct(-tangent);
                                identity.SetColumns(xAxis, -tangent, zAxis);
                                ParametricCellElement pc = CellHelper.ImportParametricCellElement(cellPath, "管环", identity, parameters);
                                //pcs.Add(pc);
                            }
                        }
                    }
                    //foreach (var item in pcs)
                    //{
                    //    //sb.AppendLine(item.ElementId.ToString());
                    //    SelectionSetManager.AddElement(item, dgnModel);
                    //}
                    //foreach (var point in additionPoints)
                    //{
                    //    var line = LineString.CreateLine(new DSegment3d(point, point));
                    //    Element lineElement = DraftingElementSchema.ToElement(dgnModel, line, null); //将CurvePrimitive转为Element， 持久化到model中
                    //    lineElement.AddToModel();
                    //}
                    //SelectionSetManager.AddElementSet(new ElementSet(pcs));

                    //CellHelpers.AttachCellLib(cellPath);

                    //foreach (var ring in data.Rings)
                    //{
                    //    CellHelpers.CreateParametricCell("管环", null, ring.Transform3d);
                    //}
                    //CellHelpers.DetachCellLibs();
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }

            }
        }
    }
    public class ElementSet : IElementSet
    {
        private readonly List<Element> _elements;
        private int _currentIndex;

        // 接受 IEnumerable<Element>，这是一个协变接口
        public ElementSet(IEnumerable<Element> elements)
        {
            // 如果传入的 elements 不为 null，则转换为 List；否则创建一个空 List
            _elements = elements?.ToList() ?? new List<Element>();
            _currentIndex = -1;
        }

        public uint GetCount()
        {
            return (uint)_elements.Count;
        }

        public Element GetFirst()
        {
            if (_elements.Count == 0)
            {
                return null;
            }
            _currentIndex = 0;
            return _elements[_currentIndex];
        }

        public Element GetNext()
        {
            if (_currentIndex >= 0 && _currentIndex < _elements.Count - 1)
            {
                _currentIndex++;
                return _elements[_currentIndex];
            }
            return null;
        }
    }
}