using Catalogger.Backend.Extensions;
using LazyCache;
using Remora.Discord.API.Abstractions.Objects;
using Remora.Discord.API.Abstractions.Rest;
using Remora.Rest.Core;

namespace Catalogger.Backend.Cache.InMemoryCache;

public class UserCache(IDiscordRestUserAPI userApi)
{
    private readonly IAppCache _cache = new CachingService();
    private int _cacheSize = 0;

    public int Size => _cacheSize;

    public async Task<IUser?> GetUserAsync(Snowflake userId) =>
        await _cache.GetOrAddAsync(
            userId.ToString(),
            async () =>
            {
                var user = await userApi.GetUserAsync(userId).GetOrThrow();
                Interlocked.Increment(ref _cacheSize);
                return user;
            }
        );

    public void UpdateUser(IUser user) => _cache.Add(user.ID.ToString(), user);
}