#nullable disable
using System;
using System.ComponentModel;
using System.Globalization;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Maui.Controls.Internals;
using Microsoft.Maui.Controls.Xaml;
using Microsoft.Maui.Controls.Xaml.Internals;
 
namespace Microsoft.Maui.Controls
{
	/// <include file="../../docs/Microsoft.Maui.Controls/ReferenceTypeConverter.xml" path="Type[@FullName='Microsoft.Maui.Controls.ReferenceTypeConverter']/Docs/*" />
	[RequireService([typeof(IReferenceProvider), typeof(IProvideParentValues)])]
	public sealed class ReferenceTypeConverter : TypeConverter, IExtendedTypeConverter
	{
 
		public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
			=> sourceType == typeof(string);
 
		public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
			=> destinationType == typeof(string);
 
		object IExtendedTypeConverter.ConvertFromInvariantString(string value, IServiceProvider serviceProvider)
		{
			if (serviceProvider == null)
				throw new ArgumentNullException(nameof(serviceProvider));
 
			var referenceProvider = serviceProvider.GetService<IReferenceProvider>();
			if (referenceProvider != null)
				return referenceProvider.FindByName(value) ?? throw new XamlParseException($"Can't resolve name '{value}' on Element", serviceProvider);
 
			if (!(serviceProvider.GetService(typeof(IProvideValueTarget)) is IProvideParentValues valueProvider))
				throw new ArgumentException("serviceProvider does not provide an IProvideValueTarget");
 
			foreach (var target in valueProvider.ParentObjects)
			{
				if (!(target is INameScope ns))
					continue;
				var element = ns.FindByName(value);
				if (element != null)
					return element;
			}
			throw new Exception("Can't resolve name on Element");
		}
 
		public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
			=> throw new NotImplementedException();
 
		public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
			=> throw new NotSupportedException();
	}
}