using System;

using FrostFS.Refs;
using FrostFS.SDK.Cryptography;

using Google.Protobuf;

using Microsoft.Extensions.Caching.Memory;

namespace FrostFS.SDK.Client.Mappers.GRPC;

public static class OwnerIdMapper
{
    private static readonly MemoryCacheEntryOptions _oneHourExpiration = new MemoryCacheEntryOptions()
        .SetSlidingExpiration(TimeSpan.FromHours(1))
        .SetSize(1);

    public static OwnerID ToMessage(this FrostFsOwner model)
    {
        if (model is null)
        {
            throw new ArgumentNullException(nameof(model));
        }

        if (!Caches.Owners.TryGetValue(model, out OwnerID? message))
        {
            message = new OwnerID
            {
                Value = ByteString.CopyFrom(model.ToHash())
            };

            Caches.Owners.Set(model, message, _oneHourExpiration);
        }

        return message!;
    }

    public static FrostFsOwner ToModel(this OwnerID message)
    {
        if (message is null)
        {
            throw new ArgumentNullException(nameof(message));
        }

        if (!Caches.Owners.TryGetValue(message, out FrostFsOwner? model))
        {
            model = new FrostFsOwner(Base58.Encode(message.Value.ToByteArray()));

            Caches.Owners.Set(message, model, _oneHourExpiration);
        }

        return model!;
    }
}