﻿using System.Linq;
using UnityEngine;

/// <summary>
/// Abstract class for making reload-proof singletons out of ScriptableObjects
/// Returns the asset created on the editor, or creates one if it's missing
/// Based on https://www.youtube.com/watch?v=VBA1QCoEAX4
/// </summary>
/// <typeparam name="T">Singleton type</typeparam>

public abstract class SingletonScriptableObject<T> : ScriptableObject where T : ScriptableObject {
    static T _instance = null;
    public static T Instance
    {
        get
        {
            if(!_instance)                            
                _instance = Resources.FindObjectsOfTypeAll<T>().FirstOrDefault() ?? CreateInstance<T>();            
            return _instance;
        }
    }
}