// 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.
 
#nullable disable
 
using System;
using System.Composition;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.BraceMatching;
using Microsoft.CodeAnalysis.ExternalAccess.FSharp.Editor;
using Microsoft.CodeAnalysis.Host.Mef;
 
namespace Microsoft.CodeAnalysis.ExternalAccess.FSharp.Internal.Editor
{
    [ExportBraceMatcher(LanguageNames.FSharp), Shared]
    internal class FSharpBraceMatcher : IBraceMatcher
    {
        private readonly IFSharpBraceMatcher _braceMatcher;
 
        [ImportingConstructor]
        [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
        public FSharpBraceMatcher(IFSharpBraceMatcher braceMatcher)
        {
            _braceMatcher = braceMatcher;
        }
 
        public async Task<BraceMatchingResult?> FindBracesAsync(Document document, int position, BraceMatchingOptions options, CancellationToken cancellationToken)
        {
            var result = await _braceMatcher.FindBracesAsync(document, position, cancellationToken).ConfigureAwait(false);
            return result.HasValue ? new BraceMatchingResult(result.Value.LeftSpan, result.Value.RightSpan) : null;
        }
    }
}