Polonium/src/PoloniumRegistry.cs

using Godot;
using Polonium.Agents;
using Polonium.Attributes;
using Polonium.Interfaces;
using Polonium.MessageManager;
using Polonium.Resources;

namespace Polonium;

public class PoloniumRegistry
{
    private static PoloniumRegistry InternalInstance { get; set; }
    public static PoloniumRegistry Instance => InternalInstance ??= new PoloniumRegistry();
    [RegistryPassThrough]
    public Config Config { get; set; }
    [RegistryPassThrough]
    public Save Save { get; set; }
    [RegistryPassThrough]
    public World CurrentWorld { get; set; }
    
    [RegistryPassThrough]
    public IPoloniumFactory PoloniumFactory { get; set; }
    [RegistryPassThrough]
    public MessageBus MessageBus { get; set; }
    

    public static void Prepare()
    {
        DirAccess.MakeDirAbsolute("user://saves");
    }
    // ReSharper disable once CollectionNeverQueried.Global
    [RegistryPassThrough(true)]
    public Dictionary<string, Agent> Agents { get; } = new();
    
    // ReSharper disable once CollectionNeverQueried.Global
    [RegistryPassThrough(true)]
    public HashSet<ITimeConsumer> TimeConsumers { get; } = new();

    public static class Action<TAction> 
        where TAction : AgentAction
    {
        // ReSharper disable once StaticMemberInGenericType
        public static string Name { get; set; }
    }


    public static class SkinRegistry<TSkin>
        where TSkin : Polonium.SkinManagers.Skin
    {
        // ReSharper disable once StaticMemberInGenericType
        public static Color[] PaletteRoots { get; set; }
        // ReSharper disable once StaticMemberInGenericType
        public static Dictionary<Color, Color[]> PaletteMap { get; set; }
    }

    public static class Asset<TAsset>
        where TAsset : Node
    {
        private static readonly Queue<TAsset> Pool = new();
        public static PackedScene Scene { get; set; }
        private static TAsset Instance => Scene.Instantiate<TAsset>();
        public static TAsset Get() => Pool.Count > 0 ? Pool.Dequeue() : Instance;

        public static void Return(TAsset asset)
        {
            if (Pool.Count < 10)
                Pool.Enqueue(asset);
            else
                asset.QueueFree();
        }
    }

}