using AnotherReplayReader.PluginSystem;
using AnotherReplayReader.Utils;
using System;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AnotherReplayReader
{
    internal static class Auth
    {
        private static readonly TaskCompletionSource<Task<string?>> _source = new();
        public static Task<string?> Id { get; } = _source.Task.Unwrap();

        public static void LoadPlugin(IPlugin plugin)
        {
            var authService = plugin.CreateAuthService(RegistryUtils.RetrieveInHklm64, Cache.CacheDirectory);
            authService.Id.ContinueWith(_source.TrySetResult);
        }

        public static async Task<byte[]?> IdAsKey()
        {
            var id = await Id.ConfigureAwait(false);
            if (string.IsNullOrEmpty(id))
            {
                return null;
            }
            var bytes = Encoding.UTF8.GetBytes(id);
            var destination = Enumerable.Repeat<byte>(0xEA, 24).ToArray();
            Array.Copy(bytes, destination, Math.Min(bytes.Length, destination.Length));
            return destination;
        }
    }
}