using System.Windows;
using System.Windows.Input;
using System.Windows.Media.Imaging;

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

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

using Microsoft.Xaml.Behaviors;

using Nice3point.Revit.Toolkit.External.Handlers;




// ReSharper disable ConditionIsAlwaysTrueOrFalse

namespace ShrlAlgoToolkit.RevitAddins.RvCommon;

public partial class InstanceCreatorViewModel : ObservableObject
{
    public InstanceCreatorViewModel(UIDocument uiDocument)
    {
        this.uiDocument = uiDocument;
        document = uiDocument.Document;
        uiDocument.Application.Application.FamilyLoadedIntoDocument += Application_FamilyLoadedIntoDocument;
        GetAvailableFamilies();
    }

    private readonly UIDocument uiDocument;

    ~InstanceCreatorViewModel()
    {
        uiDocument.Application.Application.FamilyLoadedIntoDocument -= Application_FamilyLoadedIntoDocument;
    }
    private void GetAvailableFamilies()
    {
#if REVIT2018 || REVIT2020
        //过滤掉栏杆族
        var collector = document
            .OfClass<Family>()
            .Cast<Family>()
            .Where(
                f =>
                    f.IsEditable
                    && !f.IsInPlace
                    && f.GetFamilySymbolIds().Any()
                    && f.FamilyCategory.Id.IntegerValue is not (-2000127 or -2009013 or -2005301 or -2009060)
                    && f.FamilyPlacementType
                        is FamilyPlacementType.OneLevelBased
                        or FamilyPlacementType.TwoLevelsBased
                        or FamilyPlacementType.WorkPlaneBased
                        or FamilyPlacementType.OneLevelBasedHosted
            )
            .OrderBy(f => f.Name)
            .ToList();
#elif REVIT2025
        //过滤掉栏杆族
        var collector = document
            .OfClass<Family>()
            .Cast<Family>()
            .Where(
                f =>
                    f.IsEditable
                    && !f.IsInPlace
                    && f.GetFamilySymbolIds().Any()
                    && f.FamilyCategory.Id.Value is not (-2000127 or -2009013 or -2005301 or -2009060)
                    && f.FamilyPlacementType
                        is FamilyPlacementType.OneLevelBased
                            or FamilyPlacementType.TwoLevelsBased
                            or FamilyPlacementType.WorkPlaneBased
                            or FamilyPlacementType.OneLevelBasedHosted
            )
            .OrderBy(f => f.Name)
            .ToList();
#endif
        Families = collector;
    }

    private void Application_FamilyLoadedIntoDocument(object sender, Autodesk.Revit.DB.Events.FamilyLoadedIntoDocumentEventArgs e)
    {
        GetAvailableFamilies();
    }

    private readonly ActionEventHandler handler = new();

    [ObservableProperty]
    private BitmapSource image;

    [ObservableProperty]
    [NotifyCanExecuteChangedFor(nameof(RevitAddins.RvCommon.InstanceCreatorViewModel.PlaceInstancesCommand))]
    private bool canPlaceInstance = true;

    private readonly Document document;

    [ObservableProperty]
    private double offset;

    [ObservableProperty]
    private Family selectedFamily;

    [ObservableProperty]
    [NotifyCanExecuteChangedFor(nameof(RevitAddins.RvCommon.InstanceCreatorViewModel.PlaceInstancesCommand))]
    private FamilySymbol selectedFamilySymbol;

    [ObservableProperty]
    private List<Family> families;

    [ObservableProperty]
    private List<FamilySymbol> familySymbols;

    private bool CanPlace()
    {
        return SelectedFamilySymbol != null && CanPlaceInstance;
    }
    [RelayCommand(CanExecute = nameof(CanPlace))]
    private void PlaceInstances()
    {
        CanPlaceInstance = false;
        handler.Raise(_ =>
        {
            var family = SelectedFamily;
            var symbol = SelectedFamilySymbol;
            var d = Offset / 304.8;
            Reference reference;
            try
            {
                reference = uiDocument.Selection.PickObject(ObjectType.PointOnElement, new DwgElementSelection(), "请选择dwg链接的块参照");
            }
            catch (Autodesk.Revit.Exceptions.OperationCanceledException)
            {
                CanPlaceInstance = true;
                return;
            }

            //图层ID；
            //Document.HideDwgLayer(referenceFunc, out ElementId columnGraphicStyleId, out GeometryElement columnGeoElem);
            var dwg = document.GetElement(reference) as ImportInstance;
            var geoInstances = dwg.GetBlocksByRef(reference);
            var dwgTransform = dwg!.GetTotalTransform();
            if (geoInstances == null || !geoInstances.Any())
            {
                MessageBox.Show("选中块为子块或选中块的嵌套层级过深，请使用Tab来选择整体快", "识别失败", MessageBoxButton.OK, MessageBoxImage.Error);
                CanPlaceInstance = true;
                return;
            }

            document.Invoke(
                _ =>
                {
                    if (!symbol.IsActive)
                    {
                        symbol.Activate();
                    }

                    switch (family.FamilyPlacementType)
                    {
                        case FamilyPlacementType.OneLevelBased:
                            foreach (var ins in geoInstances)
                            {
                                var level = document.ActiveView.GenLevel;
                                var loc = ins.GetLocationPoint(dwgTransform, out var rotation);

                                var familyInstance = document.Create.NewFamilyInstance(loc, symbol, level, StructuralType.NonStructural);
                                document.Regenerate();
                                ElementTransformUtils.RotateElement(document, familyInstance.Id, Line.CreateUnbound(loc, XYZ.BasisZ), rotation);
                                document.Regenerate();
                                var translation = XYZ.BasisZ * d;
                                ElementTransformUtils.MoveElement(document, familyInstance.Id, translation);
                            }

                            break;
                        case FamilyPlacementType.OneLevelBasedHosted:
#if REVIT2018 || REVIT2020
                            if (family.FamilyCategory.Id.IntegerValue is -2000023 or -2000014)
#elif REVIT2025
                            if (family.FamilyCategory.Id.Value is -2000023 or -2000014)
#endif
                            {
                                var level = document.ActiveView.GenLevel;
                                foreach (var ins in geoInstances)
                                {
                                    var loc = ins.GetLocationPoint(dwgTransform, out var rotation);

                                    var minPoint = loc - new XYZ(0.4, 0.4, -level.Elevation);
                                    var maxPoint = loc + new XYZ(0.4, 0.4, level.Elevation + 1);
                                    var outline = new Outline(minPoint, maxPoint);
                                    var intersectsFilter = new BoundingBoxIntersectsFilter(outline);
                                    var intersect = document.OfClass<Wall>().WherePasses(intersectsFilter).FirstElement() as Wall;
                                    var point = loc + (XYZ.BasisZ * level.Elevation);
                                    document.Create.NewFamilyInstance(point, symbol, intersect, level, StructuralType.NonStructural);
                                }
                            }

                            break;
                        case FamilyPlacementType.TwoLevelsBased:
                            foreach (var ins in geoInstances)
                            {
                                var level = document.ActiveView.GenLevel;
                                var loc = ins.GetLocationPoint(dwgTransform, out var rotation);

                                var familyInstance = document.Create.NewFamilyInstance(loc, symbol, level, StructuralType.NonStructural);
                                document.Regenerate();
                                ElementTransformUtils.RotateElement(document, familyInstance.Id, Line.CreateUnbound(loc, XYZ.BasisZ), rotation);
                                document.Regenerate();
                                var translation = XYZ.BasisZ * d;
                                ElementTransformUtils.MoveElement(document, familyInstance.Id, translation);
                            }

                            break;
                        case FamilyPlacementType.WorkPlaneBased:
                            foreach (var ins in geoInstances)
                            {
                                var loc = ins.GetLocationPoint(dwgTransform, out var rotation);
                                var familyInstance = document.Create.NewFamilyInstance(
                                    loc,
                                    symbol,
                                    document.ActiveView.SketchPlane,
                                    StructuralType.NonStructural
                                );
                                document.Regenerate();
                                ElementTransformUtils.RotateElement(document, familyInstance.Id, Line.CreateUnbound(loc, XYZ.BasisZ), rotation);
                                document.Regenerate();
                                var translation = XYZ.BasisZ * d;
                                ElementTransformUtils.MoveElement(document, familyInstance.Id, translation);
                            }

                            break;
                    }
                    CanPlaceInstance = true;
                },
                "实例布置"
            );
        });
    }

    //private static Dictionary<XYZ, string> WriteCode(UIApplication uiapp)
    //{
    //	var application = uiapp.Application;
    //	var uiDocument = uiapp.ActiveUIDocument;
    //	var doc = uiDocument.Document;
    //	Reference textRefer;
    //	try
    //	{
    //		//图层ID；
    //		textRefer = uiDocument.Selection.PickObject(
    //			ObjectType.PointOnElement,
    //			new FuncFilter(e => e is ImportInstance import && import.IsLinked && doc.GetElement(e.GetTypeId()) is CADLinkType),
    //			"请选择“链接（非导入）”的Cad文字图层"
    //		);
    //	}
    //	catch (Autodesk.Revit.Exceptions.OperationCanceledException)
    //	{
    //		return null;
    //	}
    //	var dwg = doc.GetElement(textRefer) as ImportInstance;
    //	var textLayerName = dwg.GetLayerName(textRefer);
    //	var path = dwg.GetFilePath();
    //	var dwgTransform = dwg.GetTotalTransform();

    //	using ACadSharp.IO.DwgReader reader = new(path);
    //	var cadDocument = reader.Read();
    //	return cadDocument.Entities
    //		.OfType<ACadSharp.Entities.TextEntity>()
    //		.Where(e => e.Layer.Name == textLayerName)
    //		.ToDictionary(
    //			v =>
    //			{
    //				var loc = dwgTransform.OfPoint(new XYZ(v.InsertPoint.X, v.InsertPoint.Y, v.InsertPoint.Z));
    //				return new XYZ(loc.X, loc.Y, 0);
    //			},
    //			e => e.Value
    //		);
    //}
    partial void OnSelectedFamilyChanged(Family value)
    {
        var doc = value.Document;
        FamilySymbols = value.GetFamilySymbolIds().Select(id => doc.GetElement(id)).OfType<FamilySymbol>().ToList();
    }

    partial void OnSelectedFamilySymbolChanged(FamilySymbol value)
    {
        Image = value.GetPreviewImage(new System.Drawing.Size(128, 128)).ToBitmapSource();
    }
}