using System.Security.Cryptography;

using FrostFS.Object;
using FrostFS.SDK.ClientV2;
using FrostFS.SDK.ClientV2.Mappers.GRPC;
using FrostFS.SDK.Cryptography;
using FrostFS.Session;

using Google.Protobuf;

using Grpc.Core;

namespace FrostFS.SDK.Tests;

public class AsyncStreamReaderMock(string key, FrostFsObjectHeader objectHeader) : ServiceBase(key), IAsyncStreamReader<GetResponse>
{
    public GetResponse Current
    {
        get
        {
            var header = new Header
            {
                ContainerId = objectHeader.ContainerId.ToMessage(),
                PayloadLength = objectHeader.PayloadLength,
                Version = objectHeader.Version!.ToMessage(),
                OwnerId = objectHeader.OwnerId!.ToMessage()
            };

            if (objectHeader.Attributes != null)
            {
                foreach (var attr in objectHeader.Attributes)
                    header.Attributes.Add(attr.ToMessage());
            }

            var response = new GetResponse
            {
                Body = new GetResponse.Types.Body
                {
                    Init = new GetResponse.Types.Body.Types.Init
                    {
                        Header = header,
                        ObjectId = new Refs.ObjectID { Value = ByteString.CopyFrom(SHA256.HashData(Array.Empty<byte>())) },
                        Signature = new Refs.Signature
                        {
                            Key = ByteString.CopyFrom(Key.PublicKey()),
                            Sign = ByteString.CopyFrom(Key.SignData(header.ToByteArray())),
                        }
                    }
                },
                MetaHeader = new ResponseMetaHeader()
            };

            response.VerifyHeader = GetResponseVerificationHeader(response);

            return response;
        }
    }

    public Task<bool> MoveNext(CancellationToken cancellationToken)
    {
        return Task.FromResult(true);
    }
}