using Autodesk.Revit.DB;


namespace ShrlAlgo.RvKits.RvCommon;

internal class AlignModelElement
{

    private readonly View ownerView;

    public AlignModelElement(Element e)
    {
        Parent = e;
        var doc = e.Document;

        ownerView = doc.GetElement(e.OwnerViewId) != null ? doc.GetElement(e.OwnerViewId) as View : doc.ActiveView;

        //var viewPlane = Plane.CreateByNormalAndOrigin(ownerView is View3D ? XYZ.BasisZ : ownerView!.ViewDirection, ownerView.Origin);

        var bounding = e.get_BoundingBox(ownerView);

        var max = bounding.Max;
        var min = bounding.Min;
        //var globalMax = bounding.Max;
        //var globalMin = bounding.Min;

        //var distanceProjected = ProjectedDistance(viewPlane, globalMax, globalMin);

        //XYZ alternateMax = new(globalMax.X, globalMin.Y, globalMax.Z);
        //XYZ alternateMin = new(globalMin.X, globalMax.Y, globalMin.Z);
        //var alternateDistanceProjected = ProjectedDistance(viewPlane, alternateMax, alternateMin);

        //if (alternateDistanceProjected > distanceProjected)
        //{
        //    globalMax = alternateMax;
        //    globalMin = alternateMin;
        //}

        //var ownerViewTransform = ownerView.CropBox.Transform;
        //var max = ownerViewTransform.Inverse.OfPoint(globalMax); //Max in the coordinate space of the view
        //var min = ownerViewTransform.Inverse.OfPoint(globalMin); //Min in the coordinate space of the view


        UpLeft = new XYZ(Math.Min(min.X, max.X), Math.Max(max.Y, min.Y), 0);
        UpRight = new XYZ(Math.Max(min.X, max.X), Math.Max(max.Y, min.Y), 0);
        DownLeft = new XYZ(Math.Min(min.X, max.X), Math.Min(max.Y, min.Y), 0);
        DownRight = new XYZ(Math.Max(min.X, max.X), Math.Min(max.Y, min.Y), 0);

        Center = (UpRight + DownLeft) / 2;
        Bottom = min.Z;
        Top = max.Z;
        Middle = (max.Z + min.Z) / 2;
        //if (ownerView is View3D)
        //{
        //    Bottom = min.Z;
        //}
        //else
        //{
        //    Bottom = Math.Min(max.Z, min.Z);
        //}
    }

    //private static double ProjectedDistance(Plane plane, XYZ pointA, XYZ pointB)
    //{
    //    //To be tested
    //    var uva = plane.ProjectOf(pointA);
    //    var uvb = plane.ProjectOf(pointB);
    //    return uva.DistanceTo(uvb);
    //}

    public void MoveTo(XYZ point, AlignType alignType)
    {
        if (!Parent.Pinned)
        {
            var displacementVector = alignType switch
            {
                AlignType.Left => point - UpLeft,
                AlignType.Right => point - UpRight,
                AlignType.Up => point - UpRight,
                AlignType.Down => point - DownRight,
                AlignType.HorizontallyCenter => point - Center,
                AlignType.VerticallyCenter => point - Center,
                AlignType.Bottom => XYZ.BasisZ * (point.Z - Bottom),
                AlignType.Top => XYZ.BasisZ * (point.Z - Top),
                AlignType.Middle => XYZ.BasisZ * (point.Z - Middle),
                _ => throw new ArgumentOutOfRangeException(nameof(alignType), alignType, null)
            };

            //位置不一样，移动
            if (!displacementVector.IsZeroLength())
            {
                //var translate = ownerView.CropBox.Transform.OfVector(displacementVector);
                //Parent.Location.Move(translate);
                ElementTransformUtils.MoveElement(Parent.Document, Parent.Id, displacementVector);
            }
        }
    }

    public double Bottom { get; }
    /// <summary>
    /// 水平面的中心
    /// </summary>
    public XYZ Center { get; }

    public XYZ DownLeft { get; }

    public XYZ DownRight { get; }
    /// <summary>
    /// 垂向的中心
    /// </summary>
    public double Middle { get; }

    public Element Parent { get; }
    public double Top { get; }

    public XYZ UpLeft { get; }

    public XYZ UpRight { get; }
}