// 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;

namespace Microsoft.AspNetCore.Razor.Language.Extensions
{
	internal class MetadataAttributeTargetExtension : IMetadataAttributeTargetExtension
	{
		public string CompiledItemAttributeName { get; set; } = "global::Microsoft.AspNetCore.Razor.Hosting.RazorCompiledItemAttribute";

		public string SourceChecksumAttributeName { get; set; } = "global::Microsoft.AspNetCore.Razor.Hosting.RazorSourceChecksumAttribute";

		public string CompiledItemMetadataAttributeName { get; set; } = "global::Microsoft.AspNetCore.Razor.Hosting.RazorCompiledItemMetadataAttribute";


		public void WriteRazorCompiledItemAttribute( CodeRenderingContext context, RazorCompiledItemAttributeIntermediateNode node )
		{
			if ( context == null )
			{
				throw new ArgumentNullException( nameof( context ) );
			}

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

			// [assembly: global::...RazorCompiledItem(typeof({node.TypeName}), @"{node.Kind}", @"{node.Identifier}")]
			context.CodeWriter.Write( "[assembly: " );
			context.CodeWriter.Write( CompiledItemAttributeName );
			context.CodeWriter.Write( "(typeof(" );
			context.CodeWriter.Write( node.TypeName );
			context.CodeWriter.Write( "), @\"" );
			context.CodeWriter.Write( node.Kind );
			context.CodeWriter.Write( "\", @\"" );
			context.CodeWriter.Write( node.Identifier );
			context.CodeWriter.WriteLine( "\")]" );
		}

		public void WriteRazorCompiledItemMetadataAttribute( CodeRenderingContext context, RazorCompiledItemMetadataAttributeIntermediateNode node )
		{
			if ( context == null )
			{
				throw new ArgumentNullException( nameof( context ) );
			}

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

			// [assembly: global::...RazorCompiledItemAttribute(@"{node.Key}", @"{node.Value}")]
			context.CodeWriter.Write( "[" );
			context.CodeWriter.Write( CompiledItemMetadataAttributeName );
			context.CodeWriter.Write( "(" );
			context.CodeWriter.WriteStringLiteral( node.Key );
			context.CodeWriter.Write( ", " );
			context.CodeWriter.WriteStringLiteral( node.Value );
			context.CodeWriter.WriteLine( ")]" );
		}

		public void WriteRazorSourceChecksumAttribute( CodeRenderingContext context, RazorSourceChecksumAttributeIntermediateNode node )
		{
			if ( context == null )
			{
				throw new ArgumentNullException( nameof( context ) );
			}

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

			// [global::...RazorSourceChecksum(@"{node.ChecksumAlgorithm}", @"{node.Checksum}", @"{node.Identifier}")]
			context.CodeWriter.Write( "[" );
			context.CodeWriter.Write( SourceChecksumAttributeName );
			context.CodeWriter.Write( "(@\"" );
			context.CodeWriter.Write( node.ChecksumAlgorithm );
			context.CodeWriter.Write( "\", @\"" );
			context.CodeWriter.Write( Checksum.BytesToString( node.Checksum ) );
			context.CodeWriter.Write( "\", @\"" );
			context.CodeWriter.Write( node.Identifier );
			context.CodeWriter.WriteLine( "\")]" );
		}
	}
}
