using System;
using System.Diagnostics.CodeAnalysis;
 
namespace Microsoft.Maui.Controls.Xaml
{
	[ContentProperty(nameof(TypeName))]
	[ProvideCompiled("Microsoft.Maui.Controls.Build.Tasks.DataTemplateExtension")]
	[RequiresUnreferencedCode(TrimmerConstants.XamlRuntimeParsingNotSupportedWarning)]
	public sealed class DataTemplateExtension : IMarkupExtension<DataTemplate>
	{
		public string TypeName { get; set; }
 
		public DataTemplate ProvideValue(IServiceProvider serviceProvider)
		{
			if (serviceProvider == null)
				throw new ArgumentNullException(nameof(serviceProvider));
			if (!(serviceProvider.GetService(typeof(IXamlTypeResolver)) is IXamlTypeResolver typeResolver))
				throw new ArgumentException("No IXamlTypeResolver in IServiceProvider");
			if (string.IsNullOrEmpty(TypeName))
			{
				var li = (serviceProvider.GetService(typeof(IXmlLineInfoProvider)) is IXmlLineInfoProvider lip) ? lip.XmlLineInfo : new XmlLineInfo();
				throw new XamlParseException("TypeName isn't set.", li);
			}
 
			if (typeResolver.TryResolve(TypeName, out var type))
				return new DataTemplate(type);
 
			var lineInfo = (serviceProvider.GetService(typeof(IXmlLineInfoProvider)) is IXmlLineInfoProvider lineInfoProvider) ? lineInfoProvider.XmlLineInfo : new XmlLineInfo();
			throw new XamlParseException($"DataTemplateExtension: Could not locate type for {TypeName}.", lineInfo);
		}
 
		object IMarkupExtension.ProvideValue(IServiceProvider serviceProvider)
		{
			return (this as IMarkupExtension<DataTemplate>).ProvideValue(serviceProvider);
		}
	}
}