// 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 System.Threading;
using Microsoft.CodeAnalysis.BraceMatching;
using Microsoft.CodeAnalysis.Classification;
using Microsoft.CodeAnalysis.Editor;
using Microsoft.CodeAnalysis.ExternalAccess.AspNetCore.EmbeddedLanguages;
using Microsoft.CodeAnalysis.Host.Mef;
 
namespace Microsoft.CodeAnalysis.ExternalAccess.AspNetCore.Internal.EmbeddedLanguages
{
    [ExportEmbeddedLanguageBraceMatcher(
        nameof(AspNetCoreEmbeddedLanguageBraceMatcher),
        [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 AspNetCoreEmbeddedLanguageBraceMatcher : IEmbeddedLanguageBraceMatcher
    {
        [ImportingConstructor]
        [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
        public AspNetCoreEmbeddedLanguageBraceMatcher()
        {
        }
 
        public BraceMatchingResult? FindBraces(
            Project project,
            SemanticModel semanticModel,
            SyntaxToken token,
            int position,
            BraceMatchingOptions options,
            CancellationToken cancellationToken)
        {
            var braceMatchers = AspNetCoreBraceMatcherExtensionProvider.GetExtensions(project);
 
            foreach (var braceMatcher in braceMatchers)
            {
                var result = braceMatcher.FindBraces(semanticModel, token, position, cancellationToken)?.ToBraceMatchingResult();
                if (result != null)
                    return result;
            }
 
            return null;
        }
    }
}