ProjectDDD/Assets/_DDD/_Scripts/GameFramework/GameManager.cs

using System.Collections.Generic;
using System.Threading.Tasks;
using UnityEngine;

namespace DDD
{
    public class GameManager : Singleton<GameManager>
    {
        [SerializeField]
        private ManagerDefinitionSo _managerDefinitionSo;

        private List<Singleton> _managerInstances;

        protected override void OnAwake()
        {
            base.OnAwake();

            EventBus.ClearAll();

            _ = Initialize();
        }

        private async Task Initialize()
        {
            Debug.Assert(_managerDefinitionSo != null, "_managerDefinitionSo is null");

            _managerInstances = new List<Singleton>(_managerDefinitionSo.ManagerClasses.Count);

            foreach (var managerPrefab in _managerDefinitionSo.ManagerClasses)
            {
                if (managerPrefab == null)
                {
                    Debug.LogWarning($"{managerPrefab.name} 프리팹이 null입니다. 건너뜁니다.");
                    continue;
                }

                var existingManager = FindAnyObjectByType(managerPrefab.GetType()) as Singleton;

                if (existingManager != null)
                {
                    print($"{existingManager.name} 오브젝트가 이미 존재합니다.");
                    _managerInstances.Add(existingManager);
                }
                else
                {
                    var newManagerInstance = Instantiate(managerPrefab);
                    newManagerInstance.name = managerPrefab.name;
                    _managerInstances.Add(newManagerInstance);
                }
            }

            // PreInit 단계 실행
            foreach (var managerInstance in _managerInstances)
            {
                if (managerInstance is IManager manager)
                {
                    manager.PreInit();
                }
            }

            // Init 단계 실행 (비동기)
            foreach (var managerInstance in _managerInstances)
            {
                if (managerInstance is IManager manager)
                {
                    await manager.Init();
                }
            }

            // PostInit 단계 실행
            foreach (var managerInstance in _managerInstances)
            {
                if (managerInstance is IManager manager)
                {
                    manager.PostInit();
                }
            }
        }
    }
}