using UnityEngine;
using Unity.Cinemachine;
using System.Collections;

public class MANAGER_DATA_RoomTransition : MonoBehaviour
{
    public static MANAGER_DATA_RoomTransition Instance;
    
    [Header("Настройки камеры")]
    public CinemachineCamera virtualCamera; 


    private CinemachineConfiner2D _confiner;

    [Header("Настройки перехода")]
    public CanvasGroup fadeOverlay;
    public float fadeDuration = 0.5f; 

    private void Awake()
    {
        if (Instance == null) { Instance = this; DontDestroyOnLoad(gameObject); }
        else { Destroy(gameObject); }
    }

    private void Start()
    {

        if (virtualCamera != null)
        {
            _confiner = virtualCamera.GetComponent<CinemachineConfiner2D>();
            
            if (_confiner == null)
            {
            }
        }
    }

    public void Travel(GameObject player, Vector3 destination, Collider2D newBounds)
    {
        StartCoroutine(TransitionRoutine(player, destination, newBounds));
    }

    private IEnumerator TransitionRoutine(GameObject player, Vector3 destination, Collider2D newBounds)
    {
        yield return StartCoroutine(Fade(1));

        Vector3 oldPosition = player.transform.position;
        Vector3 warpDelta = destination - oldPosition;

        virtualCamera.enabled = false;

        player.transform.position = destination;


        UpdateCameraBounds(newBounds);

        virtualCamera.OnTargetObjectWarped(player.transform, warpDelta);
        virtualCamera.transform.position = destination;

        virtualCamera.enabled = true;

        yield return new WaitForEndOfFrame();
        yield return new WaitForFixedUpdate();

        yield return StartCoroutine(Fade(0));
    }

    private IEnumerator Fade(float targetAlpha)
    {
        if (fadeOverlay == null) yield break;

        float startAlpha = fadeOverlay.alpha;
        float time = 0;

        while (time < fadeDuration)
        {
            time += Time.deltaTime;
            fadeOverlay.alpha = Mathf.Lerp(startAlpha, targetAlpha, time / fadeDuration);
            yield return null;
        }

        fadeOverlay.alpha = targetAlpha;
    }

    public void UpdateCameraBounds(Collider2D newBounds)
    {

        if (_confiner != null)
        {
            _confiner.BoundingShape2D = newBounds;
            

            _confiner.InvalidateCache();
        }
    }
}