using System.ComponentModel;
using System.Drawing;
using CoreGraphics;
using Microsoft.Maui.Controls.Platform;
using ObjCRuntime;
using UIKit;
 
namespace Microsoft.Maui.Controls.Compatibility.Platform.iOS
{
	[PortHandler]
	public sealed class UIActivityIndicatorViewDelegate : UIActivityIndicatorView
	{
		ActivityIndicator _element;
		public UIActivityIndicatorViewDelegate(RectangleF point, ActivityIndicator element) : base(point)
			=> _element = element;
 
		public override void Draw(CGRect rect)
		{
			base.Draw(rect);
			if (_element?.IsRunning == true)
				StartAnimating();
		}
 
		public override void LayoutSubviews()
		{
			base.LayoutSubviews();
			if (_element?.IsRunning == true)
				StartAnimating();
		}
 
		protected override void Dispose(bool disposing)
		{
			base.Dispose(disposing);
			_element = null;
		}
	}
 
	[System.Obsolete(Compatibility.Hosting.MauiAppBuilderExtensions.UseMapperInstead)]
	public class ActivityIndicatorRenderer : ViewRenderer<ActivityIndicator, UIActivityIndicatorView>
	{
		[Microsoft.Maui.Controls.Internals.Preserve(Conditional = true)]
		public ActivityIndicatorRenderer()
		{
 
		}
 
		[PortHandler]
		protected override void OnElementChanged(ElementChangedEventArgs<ActivityIndicator> e)
		{
			if (e.NewElement != null)
			{
				if (Control == null)
				{
					if (Forms.IsiOS13OrNewer)
						SetNativeControl(new UIActivityIndicatorViewDelegate(RectangleF.Empty, e.NewElement) { ActivityIndicatorViewStyle = UIActivityIndicatorViewStyle.Medium });
					else
						SetNativeControl(new UIActivityIndicatorViewDelegate(RectangleF.Empty, e.NewElement) { ActivityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray });
				}
 
				UpdateColor();
				UpdateIsRunning();
			}
 
			base.OnElementChanged(e);
		}
 
		protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
		{
			base.OnElementPropertyChanged(sender, e);
 
			if (e.PropertyName == ActivityIndicator.ColorProperty.PropertyName)
				UpdateColor();
			else if (e.PropertyName == ActivityIndicator.IsRunningProperty.PropertyName)
				UpdateIsRunning();
		}
 
		[PortHandler]
		void UpdateColor()
		{
			Control.Color = Element.Color == null ? null : Element.Color.ToPlatform();
		}
 
		[PortHandler]
		void UpdateIsRunning()
		{
			if (Control?.Superview == null)
				return;
 
			if (Element.IsRunning)
				Control.StartAnimating();
			else
				Control.StopAnimating();
		}
 
		internal void PreserveState()
		{
			if (Control != null && !Control.IsAnimating && Element != null && Element.IsRunning)
				Control.StartAnimating();
		}
	}
}