// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using Microsoft.AspNetCore.Razor.Language.CodeGeneration;
using Microsoft.AspNetCore.Razor.Language.Intermediate;

namespace Microsoft.AspNetCore.Razor.Language.Extensions
{
	internal sealed class RazorSourceChecksumAttributeIntermediateNode : ExtensionIntermediateNode
	{
		public override IntermediateNodeCollection Children => IntermediateNodeCollection.ReadOnly;

		public byte[] Checksum { get; set; }

		public string ChecksumAlgorithm { get; set; }

		public string Identifier { get; set; }

		public override void Accept( IntermediateNodeVisitor visitor )
		{
			if ( visitor == null )
			{
				throw new ArgumentNullException( nameof( visitor ) );
			}

			AcceptExtensionNode<RazorSourceChecksumAttributeIntermediateNode>( this, visitor );
		}

		public override void WriteNode( CodeTarget target, CodeRenderingContext context )
		{
			if ( target == null )
			{
				throw new ArgumentNullException( nameof( target ) );
			}

			if ( context == null )
			{
				throw new ArgumentNullException( nameof( context ) );
			}

			var extension = target.GetExtension<IMetadataAttributeTargetExtension>();
			if ( extension == null )
			{
				ReportMissingCodeTargetExtension<IMetadataAttributeTargetExtension>( context );
				return;
			}

			extension.WriteRazorSourceChecksumAttribute( context, this );
		}
	}
}
