using System;
using Microsoft.Maui.Controls.Internals;
using ObjCRuntime;
using UIKit;
 
namespace Microsoft.Maui.Controls.Compatibility.Platform.iOS
{
	[Obsolete]
	internal static class TemplateHelpers
	{
		public static IVisualElementRenderer CreateRenderer(View view)
		{
			if (view == null)
			{
				throw new ArgumentNullException(nameof(view));
			}
 
			Platform.GetRenderer(view)?.DisposeRendererAndChildren();
			var renderer = Platform.CreateRenderer(view);
			Platform.SetRenderer(view, renderer);
 
			renderer.NativeView.Bounds = view.Bounds.ToRectangleF();
 
			return renderer;
		}
 
		public static (UIView NativeView, VisualElement FormsElement) RealizeView(object view, DataTemplate viewTemplate, ItemsView itemsView)
		{
			if (viewTemplate != null)
			{
				// Run this through the extension method in case it's really a DataTemplateSelector
				viewTemplate = viewTemplate.SelectDataTemplate(view, itemsView);
 
				// We have a template; turn it into a Forms view 
				var templateElement = viewTemplate.CreateContent() as View;
 
				// Make sure the Visual property is available when the renderer is created
				PropertyPropagationExtensions.PropagatePropertyChanged(null, templateElement, itemsView);
 
				var renderer = CreateRenderer(templateElement);
 
				// and set the view as its BindingContext
				renderer.Element.BindingContext = view;
 
				return (renderer.NativeView, renderer.Element);
			}
 
			if (view is View formsView)
			{
				// Make sure the Visual property is available when the renderer is created
				PropertyPropagationExtensions.PropagatePropertyChanged(null, formsView, itemsView);
 
				// No template, and the EmptyView is a Forms view; use that
				var renderer = CreateRenderer(formsView);
 
				return (renderer.NativeView, renderer.Element);
			}
 
			return (new UILabel { TextAlignment = UITextAlignment.Center, Text = $"{view}" }, null);
		}
	}
}