// 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 System.Threading.Tasks;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.LanguageServer.Handler;
using Xunit.Sdk;
 
namespace Microsoft.CodeAnalysis.LanguageServer.UnitTests.RequestOrdering;
 
[ExportCSharpVisualBasicStatelessLspService(typeof(LongRunningNonMutatingRequestHandler)), PartNotDiscoverable, Shared]
[Method(MethodName)]
internal sealed class LongRunningNonMutatingRequestHandler : ILspServiceRequestHandler<TestRequest, TestResponse>
{
    public const string MethodName = nameof(LongRunningNonMutatingRequestHandler);
 
    [ImportingConstructor]
    [Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
    public LongRunningNonMutatingRequestHandler()
    {
    }
 
    public bool MutatesSolutionState => false;
 
    public bool RequiresLSPSolution => true;
 
    public Task<TestResponse> HandleRequestAsync(TestRequest request, RequestContext context, CancellationToken cancellationToken)
    {
        do
        {
            if (cancellationToken.IsCancellationRequested)
            {
                return Task.FromResult(new TestResponse());
            }
 
            Thread.Sleep(100);
        } while (true);
 
        throw new XunitException("Somehow we got past an infinite delay without cancelling. This is unexpected");
    }
}