using UnityEngine;
using Cinemachine;
using System.Collections;

public class CinemachineShake : MonoBehaviour
{
    public static CinemachineShake Instance { get; private set; }

    [Header("--- 컴포넌트 연결 ---")]
    private CinemachineImpulseSource _impulseSource;
    [SerializeField] private CinemachineVirtualCamera _vCam;

    [Header("--- 줌 설정 ---")]
    [SerializeField] private float defaultFOV = 60f;
    [SerializeField] private float zoomedFOV = 45f;
    [SerializeField] private float zoomSpeed = 5f;

    private Coroutine _zoomCoroutine;

    private void Awake()
    {
        Instance = this;
        _impulseSource = GetComponent<CinemachineImpulseSource>();
        if (_vCam == null) _vCam = GetComponent<CinemachineVirtualCamera>();
    }

    // ⭐ 렉 없는 타격감: 시간을 0.1배속으로 늘림 (Hit-Slow)
    public void HitSlow(float duration = 0.15f, float timeScale = 0.1f)
    {
        StartCoroutine(DoHitSlow(duration, timeScale));
    }

    private IEnumerator DoHitSlow(float duration, float timeScale)
    {
        Time.timeScale = timeScale; // 멈추지 않고 아주 느리게
        yield return new WaitForSecondsRealtime(duration);
        Time.timeScale = 1.0f;
    }

    // ⭐ 카메라 킥: 순간적으로 FOV를 확 줄여 충격을 줌
    public void CameraKick(float kickAmount = 8f)
    {
        if (_vCam == null) return;
        _vCam.m_Lens.FieldOfView -= kickAmount; // 순간 줌인
        SetZoom(false); // AnimateZoom을 통해 부드럽게 복구
    }

    public void ShakeAttack()
    {
        if (_impulseSource == null) return;
        _impulseSource.GenerateImpulse(Vector3.down * 1.5f);
    }

    public void ShakeNoNo()
    {
        if (_impulseSource == null) return;
        _impulseSource.GenerateImpulse(Vector3.right * 0.4f);
    }

    public void SetZoom(bool isZooming)
    {
        if (_vCam == null) return;
        if (_zoomCoroutine != null) StopCoroutine(_zoomCoroutine);
        float targetFOV = isZooming ? zoomedFOV : defaultFOV;
        _zoomCoroutine = StartCoroutine(AnimateZoom(targetFOV));
    }

    private IEnumerator AnimateZoom(float target)
    {
        if (_vCam == null) yield break;
        while (Mathf.Abs(_vCam.m_Lens.FieldOfView - target) > 0.1f)
        {
            _vCam.m_Lens.FieldOfView = Mathf.Lerp(_vCam.m_Lens.FieldOfView, target, Time.deltaTime * zoomSpeed);
            yield return null;
        }
        _vCam.m_Lens.FieldOfView = target;
    }
}