using System;
using System.Collections.Generic;
using UnityEngine.Assertions;

namespace NegUtils;

public interface NativePool<T> where T : class, IPoolable
{
    private static readonly List<T> Instances = new(10);

    public static T Get()
    {
        T item;
        if (Instances.Count == 0)
            item = Activator.CreateInstance<T>();
        else
        {
            item = Instances[^1];
            Instances.RemoveAt(Instances.Count - 1);
        }
        item.OnGet();
        return item;
    }

    public static void Return(T obj)
    {
        Assert.IsNotNull(obj);
        obj.OnRelease();
        
        if(Instances.Count >= Capacity)
            return;
        
        Instances.Add(obj);
    }

    public static int Capacity
    {
        get => Instances.Count;
        set => Instances.Capacity = value;
    }
}

public interface IPoolable
{
    void OnGet();
    void OnRelease();
}