using System;
using System.Collections.Generic;
using Autodesk.Revit.DB;
using Autodesk.Revit.DB.Architecture;
using Autodesk.Revit.UI;
using Autodesk.Revit.UI.Selection;

namespace GeologyToolkit
{
    [Autodesk.Revit.Attributes.Transaction(Autodesk.Revit.Attributes.TransactionMode.Manual)]
    [Autodesk.Revit.Attributes.Regeneration(Autodesk.Revit.Attributes.RegenerationOption.Manual)]
    public class DirectShapeSurface 
    {
        public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
        {
            UIApplication uiapp = commandData.Application;
            UIDocument uidoc = uiapp.ActiveUIDocument;
            Autodesk.Revit.ApplicationServices.Application app = uiapp.Application;
            Document doc = uidoc.Document;
            DocumentSet docset = uiapp.Application.Documents;

            #region FilterExecute

            var walls = new FilteredElementCollector(doc).OfClass(typeof(Wall)).ToElements();
            using (Transaction trans = new Transaction(doc, "DirectShape"))
            {
                try
                {
                    trans.Start();
                    var rd = new Random();
                    var x = rd.Next(10, 100);
                    var y = rd.Next(10, 100);
                    var z = rd.Next(10, 20);
                    List<XYZ> points = new List<XYZ>();
                    points.Add(new XYZ(0, 0, 0));
                    points.Add(new XYZ(0, 100, 0));
                    points.Add(new XYZ(100, 100, 0));
                    points.Add(new XYZ(100, 0, 0));
                    List<PolymeshFacet> facets = new List<PolymeshFacet>();

#if REVIT2018 || REVIT2019

#else
                    for (int i = 0; i < 100; i++)
                    {
                        x += i * x;
                        y += i * y;
                        z += i * z;
                        PolymeshFacet facet = new PolymeshFacet(x, y, z);
                        facets.Add(facet);
                    }
                    if (TopographySurface.IsValidFaceSet(facets, points))
                    {
                        TopographySurface surface = TopographySurface.Create(doc, points, facets);
                    }
#endif


                    trans.Commit();
                }
                catch (Exception ex)
                {
                    message = ex.Message;
                    if (trans.GetStatus() == TransactionStatus.Started)
                    {
                        trans.RollBack();
                    }

                    return Result.Failed;
                }
            }

            #endregion FilterExecute

            #region RepeatExecute

            bool isCoutine = true;
            using (Transaction trans = new Transaction(doc, "default"))
            {
                try
                {
                    while (isCoutine)
                    {
                        try
                        {
                            trans.Start();
                            //do something.
                            trans.Commit();
                        }
                        catch (Autodesk.Revit.Exceptions.OperationCanceledException ex)
                        {
                            trans.Commit();
                            return Result.Succeeded;
                        }
                    }
                }
                catch (Exception ex)
                {
                    message = ex.Message;
                    if (trans.GetStatus() == TransactionStatus.Started)
                    {
                        trans.RollBack();
                    }

                    return Result.Failed;
                }
            }

            #endregion RepeatExecute

            #region SelectExecute

            using (Transaction trans = new Transaction(doc, "default"))
            {
                try
                {
                    Reference refer = uidoc.Selection.PickObject(ObjectType.Element, "请选择XXX");
                    Element e = uidoc.Document.GetElement(refer);

                    trans.Start();
                    //Do Something.
                    trans.Commit();
                }
                catch (Autodesk.Revit.Exceptions.OperationCanceledException ex)
                {
                    if (trans.GetStatus() == TransactionStatus.Started)
                    {
                        trans.RollBack();
                    }

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

                    return Result.Failed;
                }
            }

            #endregion SelectExecute

            return Result.Succeeded;
        }
    }
}