// 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.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Storage;
 
namespace Microsoft.CodeAnalysis.Host
{
    internal sealed class NoOpPersistentStorageService : IChecksummedPersistentStorageService
    {
        private static readonly IChecksummedPersistentStorageService Instance = new NoOpPersistentStorageService();
 
        private NoOpPersistentStorageService()
        {
        }
 
        public static IChecksummedPersistentStorageService GetOrThrow(IPersistentStorageConfiguration configuration)
            => configuration.ThrowOnFailure
                ? throw new InvalidOperationException("Database was not supported")
                : Instance;
 
        public ValueTask<IChecksummedPersistentStorage> GetStorageAsync(SolutionKey solutionKey, CancellationToken cancellationToken)
            => new(NoOpPersistentStorage.GetOrThrow(throwOnFailure: false));
    }
}