using CoreGraphics;
using Microsoft.Maui.Controls.Internals;
using Microsoft.Maui.Controls.Platform;
#if __MOBILE__
using ObjCRuntime;
using UIKit;
namespace Microsoft.Maui.Controls.Compatibility.Platform.iOS
#else
using UIView = AppKit.NSView;
 
namespace Microsoft.Maui.Controls.Compatibility.Platform.MacOS
#endif
{
#pragma warning disable CS0618 // Type or member is obsolete
	public class NativeViewWrapperRenderer : ViewRenderer<NativeViewWrapper, UIView>
#pragma warning restore CS0618 // Type or member is obsolete
	{
		[Microsoft.Maui.Controls.Internals.Preserve(Conditional = true)]
		public NativeViewWrapperRenderer()
		{
 
		}
 
		public override SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
		{
			if (Element?.GetDesiredSizeDelegate == null)
				return base.GetDesiredSize(widthConstraint, heightConstraint);
 
			// The user has specified a different implementation of GetDesiredSize
			var result = Element.GetDesiredSizeDelegate(this, widthConstraint, heightConstraint);
 
			// If the GetDesiredSize delegate returns a SizeRequest, we use it; if it returns null,
			// fall back to the default implementation
			return result ?? base.GetDesiredSize(widthConstraint, heightConstraint);
		}
 
#if __MOBILE__
		public override void LayoutSubviews()
		{
			if (Element?.LayoutSubViews == null)
			{
				((IVisualElementController)Element)?.InvalidateMeasure(InvalidationTrigger.MeasureChanged);
				base.LayoutSubviews();
				return;
			}
 
			// The user has specified a different implementation of LayoutSubviews
			var handled = Element.LayoutSubViews();
 
			if (!handled)
			{
				// If the delegate wasn't able to handle the request, fall back to the default implementation
				base.LayoutSubviews();
			}
		}
 
		public override CGSize SizeThatFits(CGSize size)
		{
			if (Element?.SizeThatFitsDelegate == null)
				return base.SizeThatFits(size);
 
			// The user has specified a different implementation of SizeThatFits
			var result = Element.SizeThatFitsDelegate(size);
 
			// If the delegate returns a value, we use it; 
			// if it returns null, fall back to the default implementation
			return result ?? base.SizeThatFits(size);
		}
#else
		public override void Layout()
		{
			if (Element?.LayoutSubViews == null)
			{
				((IVisualElementController)Element)?.InvalidateMeasure(InvalidationTrigger.MeasureChanged);
				base.Layout();
				return;
			}
 
			// The user has specified a different implementation of LayoutSubviews
			var handled = Element.LayoutSubViews();
 
			if (!handled)
			{
				// If the delegate wasn't able to handle the request, fall back to the default implementation
				base.Layout();
			}
		}
#endif
 
		protected override void OnElementChanged(ElementChangedEventArgs<NativeViewWrapper> e)
		{
			base.OnElementChanged(e);
 
			if (e.OldElement == null)
				SetNativeControl(Element.NativeView);
		}
 
		/// <summary>
		/// The native control we're wrapping isn't ours to dispose of
		/// </summary>
		protected override bool ManageNativeControlLifetime => false;
	}
}