using NATS.Server.JetStream.Models;

namespace NATS.Server.JetStream.Storage;

public interface IStreamStore
{
    ValueTask<ulong> AppendAsync(string subject, ReadOnlyMemory<byte> payload, CancellationToken ct);
    ValueTask<StoredMessage?> LoadAsync(ulong sequence, CancellationToken ct);
    ValueTask<StoredMessage?> LoadLastBySubjectAsync(string subject, CancellationToken ct);
    ValueTask<IReadOnlyList<StoredMessage>> ListAsync(CancellationToken ct);
    ValueTask<bool> RemoveAsync(ulong sequence, CancellationToken ct);
    ValueTask PurgeAsync(CancellationToken ct);
    ValueTask<byte[]> CreateSnapshotAsync(CancellationToken ct);
    ValueTask RestoreSnapshotAsync(ReadOnlyMemory<byte> snapshot, CancellationToken ct);
    ValueTask<StreamState> GetStateAsync(CancellationToken ct);
}