using System;

using Autodesk.Revit.Attributes;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using Autodesk.Revit.UI.Selection;

using Sai.Toolkit.Revit.Assist;

namespace RvAddinTest;
[Transaction(TransactionMode.Manual)]
[Regeneration(RegenerationOption.Manual)]
public class CADCurveToModelCurveCmd : IExternalCommand
{
    public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
    {
        //程序UI界面
        UIApplication uiapp = commandData.Application;
        //获取元素（选择） 显示元素 视图（活动视图）管理（对象）
        UIDocument uidoc = uiapp.ActiveUIDocument;
        //程序
        Autodesk.Revit.ApplicationServices.Application app = uiapp.Application;
        //获取位置和场地 视图（多个视图）管理 获取元素（Revit 项目里的全部元素）
        Document doc = uidoc.Document;
        //获取所有打开文档
        DocumentSet docset = uiapp.Application.Documents;
        //当前视图
        View view = doc.ActiveView;

        #region SelectExecute

        using (Transaction trans = new Transaction(doc, "default"))
        {
            try
            {
                Reference refer = uidoc.Selection.PickObject(ObjectType.Element, "请选择CAD");
                Element e = uidoc.Document.GetElement(refer);
                if (e is ImportInstance ins)
                {
                    trans.Start();
                    var cadGeo = e.GetGeometryObjects().FirstOrDefault();
                    List<GeometryObject> curves = [];
                    if (cadGeo is GeometryInstance geometryInstance)
                    {
                        curves = [.. geometryInstance.GetInstanceGeometry()];
                    }
                    foreach (var c in curves)
                    {

                        if (c is NurbSpline nurb)
                        {
                            if (nurb.Length > 100 / 304.8)
                            {
                                var points = nurb.Tessellate();
                                ReferencePointArray array = new ReferencePointArray();
                                foreach (var p in points)
                                {
                                    var rp = doc.FamilyCreate.NewReferencePoint(p);
                                    array.Append(rp);
                                }
                                var curveBypoints = doc.FamilyCreate.NewCurveByPoints(array);
                            }
                        }
                        if (c is PolyLine poly)
                        {
                            ReferencePointArray array = new ReferencePointArray();

                            for (int i = 0; i < poly.NumberOfCoordinates - 1; i++)
                            {
                                var p = poly.GetCoordinate(i);
                                //Line.CreateBound(p, poly.GetCoordinate(i + 1));
                            }
                        }
                        if (c is Line l)
                        {

                        }
                    }
                    trans.Commit();
                }

            }
            catch (Autodesk.Revit.Exceptions.OperationCanceledException ex)
            {
                if (trans.GetStatus() == TransactionStatus.Started)
                {
                    trans.Commit();
                }

                return Result.Succeeded;
            }
            catch (Exception ex)
            {
                message = ex.Message;
                if (trans.GetStatus() == TransactionStatus.Started)
                {
                    trans.RollBack();
                }
                return Result.Failed;
            }
        }

        #endregion SelectExecute

        return Result.Succeeded;
    }
}