// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System;
using System.IO;
using System.Threading;
using System.Threading.Tasks;

namespace Microsoft.AspNetCore.Http.Extensions.Tests
{
    public class TestStream : Stream
    {
        public override bool CanRead { get; }
        public override bool CanSeek { get; }
        public override bool CanWrite { get; }
        public override long Length { get; }
        public override long Position { get; set; }

        public override void Flush()
        {
            throw new NotImplementedException();
        }

        public override int Read(byte[] buffer, int offset, int count)
        {
            throw new NotImplementedException();
        }

        public override long Seek(long offset, SeekOrigin origin)
        {
            throw new NotImplementedException();
        }

        public override void SetLength(long value)
        {
            throw new NotImplementedException();
        }

        public override void Write(byte[] buffer, int offset, int count)
        {
            throw new NotImplementedException();
        }

        public override ValueTask<int> ReadAsync(Memory<byte> buffer, CancellationToken cancellationToken = default)
        {
            var tcs = new TaskCompletionSource<int>();
            cancellationToken.Register(s => ((TaskCompletionSource<int>)s).SetCanceled(), tcs);
            return new ValueTask<int>(tcs.Task);
        }

        public override ValueTask WriteAsync(ReadOnlyMemory<byte> buffer, CancellationToken cancellationToken = default)
        {
            var tcs = new TaskCompletionSource<int>();
            cancellationToken.Register(s => ((TaskCompletionSource<int>)s).SetCanceled(), tcs);
            return new ValueTask(tcs.Task);
        }
    }
}
