using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Cinemachine;
using DG.Tweening;

public class CMvCamController : MonoBehaviour

{
    public CinemachineVirtualCamera vcamera;
    public CinemachineBrain cmBrain;
    private CinemachinePOV vcameraPOV;
    private ICinemachineCamera icCam;

    float scroll;
    float view;
    float targetFOV;

    [SerializeField] float minFOV;
    [SerializeField] float maxFOV;
    [SerializeField] float scrollVolume;

    // Start is called before the first frame update
    void Start()
    {
        vcameraPOV = vcamera.GetCinemachineComponent<CinemachinePOV>();
    }

    // Update is called once per frame
    void Update()
    {
        MouseEvent();
    }

    private void MouseEvent()
    {

        icCam = cmBrain.ActiveVirtualCamera;

        GameObject vCamObj = icCam.VirtualCameraGameObject;

        if (vCamObj != this.gameObject) // 自分のカメラがアクティブのときのみ作動
            {
            return;
        }

        else

        if((Input.GetMouseButtonDown(2)))
        {
            return;
        }

        else
        {
        scroll = Input.GetAxis("Mouse ScrollWheel");
            if (scroll != 0.0f)
            {
                view = vcamera.m_Lens.FieldOfView - scroll * scrollVolume;
                targetFOV = Mathf.Clamp(value: view, min: minFOV, max: maxFOV);
                SetFOV(targetFOV);
         }
        }
    }

    public void SetFOV(float fov)
    {
        DOTween.To(
          () => vcamera.m_Lens.FieldOfView,
          num => vcamera.m_Lens.FieldOfView = num,
          fov,
          1.0f
          );
    }

}