// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System;
using System.Composition;
using Microsoft.CodeAnalysis.Classification;
using Microsoft.CodeAnalysis.ExternalAccess.AspNetCore.EmbeddedLanguages;
using Microsoft.CodeAnalysis.Host.Mef;
 
namespace Microsoft.CodeAnalysis.ExternalAccess.AspNetCore.Internal.EmbeddedLanguages
{
    [ExportEmbeddedLanguageClassifier(
        nameof(AspNetCoreEmbeddedLanguageClassifier),
        [LanguageNames.CSharp],
        supportsUnannotatedAPIs: false,
        // Add more syntax names here in the future if there are additional cases ASP.Net would like to light up on.
        identifiers: ["Route"]), Shared]
    internal class AspNetCoreEmbeddedLanguageClassifier : IEmbeddedLanguageClassifier
    {
        [ImportingConstructor]
        [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
        public AspNetCoreEmbeddedLanguageClassifier()
        {
        }
 
        public void RegisterClassifications(EmbeddedLanguageClassificationContext context)
        {
            if (context.Project is null)
                return;
 
            var classifiers = AspNetCoreClassifierExtensionProvider.GetExtensions(context.Project);
            if (classifiers.Length == 0)
                return;
 
            var aspContext = new AspNetCoreEmbeddedLanguageClassificationContext(context);
            foreach (var classifier in classifiers)
                classifier.RegisterClassifications(aspContext);
        }
    }
}