using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Sirenix.OdinInspector;
using Unity.Cinemachine;
using UnityEngine;
using UnityEngine.SceneManagement;

namespace DDD
{
    public enum CameraType
    {
        BaseCam = 0,
    }

    public class CameraManager : Singleton<CameraManager>
    {
        [ShowInInspector]
        private Dictionary<CameraType, CinemachineCamera> _cameraDict;
        
        private CinemachineBrain _cinemachineBrain;

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

            _cinemachineBrain = GetComponent<CinemachineBrain>();
        }

        private void Start()
        {
            SceneManager.sceneLoaded += OnSceneLoaded;
        }

        private void OnDestroy()
        {
            SceneManager.sceneLoaded -= OnSceneLoaded;
        }
        
        private void OnSceneLoaded(Scene scene, LoadSceneMode mode)
        {
            _ = RegisterCinemachineCamerasAsync(scene);
        }

        private async Task RegisterCinemachineCamerasAsync(Scene scene)
        {
            // 씬 로딩 직후는 Hierarchy 반영이 완료되지 않았을 수 있음
            await Task.Yield(); // 다음 프레임까지 대기

            var foundCams = FindObjectsByType<CinemachineCamera>(FindObjectsInactive.Include, FindObjectsSortMode.None);
            _cameraDict.Clear();

            foreach (var cam in foundCams)
            {
                if (Enum.TryParse<CameraType>(cam.name, out var type))
                {
                    if (!_cameraDict.TryAdd(type, cam))
                        Debug.LogWarning($"중복된 CameraType: {type}");
                }
                else
                {
                    Debug.LogWarning($"Enum에 없는 카메라 이름: {cam.name}");
                }
            }

            Debug.Log("[CameraManager] 카메라 등록 완료");

            if (scene.name == "01.Restaurant")
            {
                SwitchCamera(CameraType.BaseCam);
            }
        }
        
        public void SwitchCamera(CameraType cameraType, CinemachineBlendDefinition.Styles blendStyle = CinemachineBlendDefinition.Styles.Cut, float blendDuration = 1f)
        {
            _cinemachineBrain.DefaultBlend = new CinemachineBlendDefinition(blendStyle, blendDuration);
            foreach (var pair in _cameraDict)
            {
                pair.Value.Priority = (pair.Key == cameraType) ? 10 : 0;
            }
        }
    }
}