using System.Diagnostics;

using Autodesk.Revit.DB;
using Autodesk.Revit.UI;

using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;

using Nice3point.Revit.Toolkit.External.Handlers;

namespace Sai.RvKits.RvView
{
    public partial class QuickViewSectionViewModel(UIDocument uidoc) : ObservableObject
    {
        private readonly ActionEventHandler handler = new();

        [ObservableProperty]
        private bool isParallel = true;

        [RelayCommand]
        private void CreateViewSection()
        {
            var element = uidoc.SelectObject(new FuncFilter(elem => elem.GetLocCurve() is Line));
            if (element != null)
            {
                var lc = element.Location as LocationCurve;
                var line = lc.Curve as Line;
                var doc = uidoc.Document;
                var viewfamilyType = doc.OfClass<ViewFamilyType>()
                            .Cast<ViewFamilyType>()
                            .Where(t => t.ViewFamily == ViewFamily.Section)
                            .FirstOrDefault();
                var bb = element.get_BoundingBox(null);
                var minZ = bb.Min.Z;
                var maxZ = bb.Max.Z;

                var baseLength = (bb.Max - bb.Min).GetLength();

                ViewSection viewSection = null;
                BoundingBoxXYZ sectionBox;
                var offset = 0.2 * baseLength;
                var t = Transform.Identity;
                Debug.WriteLine($"Length：{baseLength}");
                Debug.WriteLine($"Offset：{offset}");
                Debug.WriteLine("拾取对象：");

                Debug.WriteLine($"Min：{bb.Min}");
                Debug.WriteLine($"Max：{bb.Max}");

                t.Origin = line.Evaluate(0.5, true).Flatten();
                Debug.WriteLine("定义剖面：");
                Debug.WriteLine($"Transform.Origin：{t.Origin}");
                t.BasisY = XYZ.BasisZ;//UpDirection
                var viewName = $"{element.Category.Name}({element.Id})";
                if (IsParallel)
                {
                    var min = new XYZ(-baseLength / 2, minZ - offset, -offset);
                    var max = new XYZ(baseLength / 2, maxZ + offset, offset);
                    Debug.WriteLine($"Min：{min}");
                    Debug.WriteLine($"Max：{max}");

                    viewName = $"平行剖面-{viewName}";
                    t.BasisX = line.Direction;//与生成的最终剖面视图的RightDirection反向(定义Transform)
                    t.BasisZ = line.Direction.CrossProduct(XYZ.BasisZ);//与生成的最终剖面视图的ViewDirection反向(定义Transform)
                    Debug.WriteLine($"Transform.BasisX：{t.BasisX}");
                    Debug.WriteLine($"Transform.BasisZ：{t.BasisZ}");

                    sectionBox = new BoundingBoxXYZ
                    {
                        Transform = t,
                        Min = min,
                        Max = max
                    };
                }
                else
                {
                    //var transform = line.ComputeDerivatives(0.5, true);//求导切向为BasisX
                    viewName = $"正交剖面-{viewName}";
                    t.BasisX = XYZ.BasisZ.CrossProduct(line.Direction);
                    t.BasisZ = line.Direction;
                    var min = new XYZ(-3000 / 304.8 / 2, minZ - offset, -offset);
                    var max = new XYZ(3000 / 304.8 / 2, maxZ + offset, offset);

                    Debug.WriteLine($"Transform.BasisX：{t.BasisX}");
                    Debug.WriteLine($"Transform.BasisZ：{t.BasisZ}");

                    sectionBox = new BoundingBoxXYZ
                    {
                        Transform = t,
                        Min = min,
                        Max = max
                    };
                }
                handler.Raise(
                      _ =>
                      {
                          doc.Invoke(
                           ts =>
                           {
                               viewSection = ViewSection.CreateSection(uidoc.Document, viewfamilyType.Id, sectionBox);
                               viewSection.DisplayStyle = DisplayStyle.ShadingWithEdges;
                               viewSection.DetailLevel = ViewDetailLevel.Fine;
                               var isExistName = false;
                               try
                               {
                                   viewSection.Name = viewName;
                               }
                               catch (Autodesk.Revit.Exceptions.ArgumentException)
                               {
                                   isExistName = true;
                               }
                               if (isExistName)
                               {
                                   for (var i = 0; i < 100; i++)
                                   {
                                       try
                                       {
                                           viewSection.Name = $"{viewName} {i + 1}";
                                           break;
                                       }
                                       catch (Autodesk.Revit.Exceptions.ArgumentException)
                                       {
                                       }
                                   }
                               }
                               ts.Commit();
                               Debug.WriteLine("生成后：");

                               Debug.WriteLine($"CropBox.Origin：{viewSection.CropBox.Transform.Origin}");
                               Debug.WriteLine($"CropBox.BasisX：{viewSection.CropBox.Transform.BasisX}");
                               Debug.WriteLine($"CropBox.BasisZ：{viewSection.CropBox.Transform.BasisZ}");

                               Debug.WriteLine($"CropBox.Min：{viewSection.CropBox.Min}");
                               Debug.WriteLine($"CropBox.Max：{viewSection.CropBox.Max}");

                               Debug.WriteLine($"RightDirection：{viewSection.RightDirection}");
                               Debug.WriteLine($"ViewDirection：{viewSection.ViewDirection}");

                               if (viewSection != null)
                               {
                                   uidoc.ActiveView = viewSection;
                                   uidoc.Selection.SetElementIds([element.Id]);
                               }
                           });
                      });
            }
        }

    }
}