ProjectDDD/Assets/_DDD/_Scripts/GameUi/UiManager.cs

using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.AddressableAssets;

namespace DDD
{
    public class UiManager : Singleton<UiManager>, IManager, IGameFlowHandler
    {
        [SerializeField] private AssetReference _popupUiState;
        [SerializeField] private Transform _popupUiRoot;

        public PopupUiState PopupUiState { get; private set; }

        private void OnDestroy()
        {
            GameFlowManager.Instance?.FlowHandlers?.Remove(this);
        }

        public void PreInit()
        {
            GameFlowManager.Instance.FlowHandlers.Add(this);

            foreach (Transform child in _popupUiRoot)
            {
                Destroy(child.gameObject);
            }
        }

        public async Task Init()
        {
            await LoadData();
        }

        public void PostInit()
        {

        }

        public Task OnReadyNewFlow(GameFlowState newFlowState)
        {
            PopupUiState.CreateMatchingPopupUis(newFlowState, _popupUiRoot);
            return Task.CompletedTask;
        }

        public Task OnExitCurrentFlow(GameFlowState exitingFlowState)
        {
            PopupUiState.DestroyMatchingPopupUis(exitingFlowState);
            return Task.CompletedTask;
        }

        private async Task LoadData()
        {
            var handle = _popupUiState.LoadAssetAsync<PopupUiState>();
            await handle.Task;
            PopupUiState = handle.Result;

            Debug.Assert(PopupUiState != null, "PopupUiState is null");

            PopupUiState.Initialize();
        }
    }
}