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

namespace Template_RuntimeInstance
{
    public class AbilityIndexer : MonoBehaviour
    {
        #region Singleton
        private static AbilityIndexer _instance;

        // Public reference to the singleton instance
        public static AbilityIndexer Instance
        {
            get
            {
                // If the instance doesn't exist, try to find it in the scene
                if (_instance == null)
                {
                    _instance = FindObjectOfType<AbilityIndexer>();

                    // If it's still null, create a new GameObject and add the component
                    if (_instance == null)
                    {
                        GameObject singletonObject = new GameObject(typeof(AbilityIndexer).Name);
                        _instance = singletonObject.AddComponent<AbilityIndexer>();
                    }
                }
                return _instance;
            }
        }
        #endregion

        public List<BaseAbility> Abilities = new List<BaseAbility>();

        protected void Awake()
        {
            // Ensure there's only one instance
            if (_instance != null && _instance != this)
            {
                Destroy(gameObject);
                return;
            }

            // If this is the first instance, set it as the singleton
            _instance = this;
            DontDestroyOnLoad(gameObject);
        }

        private void OnValidate()
        {
            if (Abilities == null) return;

            foreach (BaseAbility baseAbility in Resources.FindObjectsOfTypeAll<BaseAbility>())
            {
                if (Abilities.Contains(baseAbility)) continue;

                Abilities.Add(baseAbility);
            }
        }
    }
}