using System;
using System.Collections;
using System.Collections.Generic;
using Cielonos.Core.UI;
using Cielonos.MainGame.Map;
using DG.Tweening;
using SLSUtilities.General;
using UnityEngine;
using UnityEngine.SceneManagement;

namespace Cielonos.MainGame
{
    public partial class MapManager : Singleton<MapManager>
    {
        public MapBaseCollection baseCollection;
        
        public ZoneData currentZoneData;
        public ZoneManager currentZoneManager;
        public int zoneIndex;
        public List<ZoneData> zoneDataList;

        public void Start()
        {
            zoneIndex = 0;
            StartCoroutine(SwitchRoomRoutine(zoneDataList[zoneIndex++]));
        }
        
        public void GoToNextZone()
        {
            if (zoneIndex >= zoneDataList.Count)
            {
                Debug.Log("No more zones to load.");
                return;
            }

            ScreenFader.Instance.FadeToBlack(onComplete : () => StartCoroutine(SwitchRoomRoutine(zoneDataList[zoneIndex++]))).Play();
        }
    }

    public partial class MapManager
    {
        public static MapBaseCollection BaseCollection => Instance.baseCollection;
    }
    
    public partial class MapManager
    {
        public IEnumerator SwitchRoomRoutine(ZoneData nextZoneData) {
            // 1. 发送转场开始事件 (UI显示遮挡，特效触发)
            //EventManager.Trigger("OnTeleportStart");
    
            // 2. 异步卸载旧场景
            if (currentZoneData != null) {
                yield return SceneManager.UnloadSceneAsync(currentZoneData.sceneName);
            }

            currentZoneData = nextZoneData;
            
            // 3. 异步加载新场景
            string nextSceneName = nextZoneData.sceneName;
            AsyncOperation op = SceneManager.LoadSceneAsync(nextSceneName, LoadSceneMode.Additive);
            op.allowSceneActivation = false; // 先不激活，等加载到90%

            while (op.progress < 0.9f) {
                yield return null; 
            }
    
            op.allowSceneActivation = true; // 允许激活
            yield return op; // 等待激活完成

            // 4. 设置为活跃场景 (非常重要！)
            Scene nextScene = SceneManager.GetSceneByName(nextSceneName);
            SceneManager.SetActiveScene(nextScene);

            // 5. 将玩家放到出生点
            //Player.Instance.TeleportTo(FindObjectOfType<SpawnPoint>().transform.position);

            yield return new WaitForEndOfFrame();
            
            BattleManager.AttackAreaSm.Reset();
            BattleManager.EnemySm.Reset();
            MainGameManager.Player.transform.position = Vector3.zero;
            ZoneManager.instance.SetupZone(currentZoneData);
            // 6. 发送转场结束事件 (特效消失，UI关闭)
            //EventManager.Trigger("OnTeleportEnd");
            
            yield return new WaitForSeconds(0.5f);
            ScreenFader.Instance.FadeToClear().Play();
        }
    }
}