using Autodesk.Revit.DB;
using Autodesk.Revit.UI.Selection;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using Nice3point.Revit.Toolkit.External.Handlers;


namespace ShrlAlgoToolkit.RevitAddins.RvMEP;

public partial class MoveMEPCurveViewModel : ObservableValidator
{
    [ObservableProperty]
    public partial bool IsSingle { get; set; } = true;

    [ObservableProperty]
    public partial bool ByDistance { get; set; } = true;

    private readonly ActionEventHandler moveHandler = new();

    [Common.Attributes.IsNumeric]
    [ObservableProperty]
    [NotifyDataErrorInfo]
    public partial double Distance { get; set; }

    //public double Distance
    //{
    //    get => distance;
    //    set => SetProperty(ref distance, value, true);
    //}

    /// <summary>
    ///     正在执行命令
    /// </summary>
    [ObservableProperty]
    [NotifyCanExecuteChangedFor(nameof(MoveCommand))]
    public partial bool CanRunning { get; set; } = true;

    [RelayCommand]
    private void Closing()
    {
        #region 关闭窗口退出选择

        if (!CanRunning)
        {
            KeyIntPtrHelper.RaiseEscTwice();
        }

        #endregion
    }
    [RelayCommand]
    private void Select()
    {
        moveHandler.Raise(uiapp =>
        {
            var uiDocument = uiapp.ActiveUIDocument;
            var doc = uiDocument.Document;
            try
            {
                var reference = uiDocument.Selection.PickObject(ObjectType.Element, new GenericFilter<MEPCurve>(), "请选择移动管线");
                var mepCurve = doc.GetElement(reference) as MEPCurve;
                var ids = new List<ElementId>();
                mepCurve.GetAllConnectedElements(ids);
                uiDocument.Selection.SetElementIds(ids);
            }
            catch (Exception)
            {
                return;
            }

            CanRunning = true;
        });
    }
    [RelayCommand]
    private void Move()
    {
        CanRunning = false;
        moveHandler.Raise(uiapp =>
        {
            var uiDocument = uiapp.ActiveUIDocument;
            var doc = uiDocument.Document;

            doc.Invoke(
                _ =>
                {
                    double z;
                    MEPCurve mepCurve;

                    try
                    {
                        var reference = uiDocument.Selection.PickObject(ObjectType.Element, new GenericFilter<MEPCurve>(), "请选择移动管线");
                        mepCurve = doc.GetElement(reference) as MEPCurve;
                    }
                    catch (Exception)
                    {
                        CanRunning = true;
                        return;
                    }

                    if (ByDistance)
                    {
                        z = Distance / 304.8;
                    }
                    else
                    {
                        Reference reference = null;
                        ElementInLinkOrCurrentDocument linkOrCurrentDocument = new(doc);

                        try
                        {
                            reference = uiDocument.Selection.PickObject(ObjectType.PointOnElement, linkOrCurrentDocument, "请选择基准元素");
                        }
                        catch (Exception)
                        {
                            // ignored
                        }

                        if (reference == null)
                        {
                            CanRunning = true;
                            return;
                        }

                        var referenceElem = linkOrCurrentDocument.LastCheckedWasFromLink
                            ? linkOrCurrentDocument.LinkedDocument.GetElement(reference.LinkedElementId)
                            : doc.GetElement(reference);

                        var referMaxZ = referenceElem.get_BoundingBox(doc.ActiveView).Max.Z;
                        var referMinZ = referenceElem.get_BoundingBox(doc.ActiveView).Min.Z;
                        var maxZ = mepCurve.get_BoundingBox(doc.ActiveView).Max.Z;
                        var minZ = mepCurve.get_BoundingBox(doc.ActiveView).Min.Z;
                        //参考底部大于原管线顶部
                        if (referMinZ > maxZ)
                        {
                            z = (referMinZ - Math.Abs((double)Distance) / 304.8) - maxZ;
                        }
                        //参考顶部大于原管线底部
                        else if (referMaxZ < minZ)
                        {
                            z = (referMaxZ + Math.Abs((double)Distance) / 304.8) - minZ;
                        }
                        else
                        {
                            CanRunning = true;
                            return;
                        }
                    }

                    if (IsSingle)
                    {
                        ElementTransformUtils.MoveElement(doc, mepCurve.Id, XYZ.BasisZ * z);
                    }
                    else
                    {
                        var ids = new List<ElementId>();
                        mepCurve.GetAllConnectedElements(ids);
                        ElementTransformUtils.MoveElements(doc, ids, XYZ.BasisZ * z);
                    }
                },
                "移动管线"
            );
            CanRunning = true;
        });
    }
}