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

namespace DDD
{
    public enum SceneType
    {
        Title = 0,
        Restaurant = 1
    }
    
    public static class SceneTypeExtensions
    {
        public static string ToSceneName(this SceneType sceneType)
        {
            return sceneType switch
            {
                SceneType.Title => "00.Title",
                SceneType.Restaurant => "01.Restaurant",
                _ => throw new ArgumentOutOfRangeException(nameof(sceneType), sceneType, null)
            };
        }
    }
    
    public class GameManager : Singleton<GameManager>
    {
        public SceneType CurrentSceneType { get; private set; }

        private void Start()
        {
            CurrentSceneType = SceneType.Title;
        }

        public async Task ChangeScene(SceneType sceneType)
        {
            string changeSceneName;
    
            try
            {
                changeSceneName = sceneType.ToSceneName();
            }
            catch (ArgumentOutOfRangeException e)
            {
                Debug.LogError($"[GameManager] 정의되지 않은 SceneType: {sceneType} - {e.Message}");
                return;
            }

            await UiManager.Instance.FadeIn();
            
            AsyncOperation loadSceneAsync = SceneManager.LoadSceneAsync(changeSceneName, LoadSceneMode.Additive);
            while (loadSceneAsync is { isDone: false })
                await Task.Yield();
            
            // 씬 로딩 후 초기화 작업
            UiManager.Instance.ChangeScene(CurrentSceneType, sceneType);
            CameraManager.Instance.ChangeScene(sceneType);
            KeyManager.Instance.ChangeScene(sceneType);

            CurrentSceneType = sceneType;
            
            await Task.Delay(1000);
            await UiManager.Instance.FadeOut();
            
            Debug.Log($"{changeSceneName} 씬으로 전환 완료");
        }
        
        public void ChangeSceneByIndex(int index)
        {
            var sceneType = (SceneType)index;
            _ = ChangeScene(sceneType);
        }
    }
}