using Cinemachine;
using UnityEngine;

public class ObjectCameraController : MonoBehaviour
{
    [Tooltip("需要旋转的目标物体")]
    public Transform target;

    [Tooltip("用于控制的Cinemachine虚拟相机")]
    public CinemachineVirtualCamera virtualCamera;

    [Header("旋转设置")]
    [Tooltip("左右旋转的速度")]
    public float rotationSpeed = 5f;

    [Header("FOV设置（控制远近效果）")]
    [Tooltip("初始视野角度")]
    public float initialFOV = 60f;

    [Tooltip("最大视野角度（看起来更远）")]
    public float maxFOV = 90f;

    [Tooltip("最小视野角度（看起来更近）")]
    public float minFOV = 30f;

    [Tooltip("滚轮控制FOV的灵敏度")]
    public float fovSensitivity = 5f;

    private float currentFOV;

    void Start()
    {
        // 如果未指定虚拟相机，尝试查找场景中的CinemachineVirtualCamera
        if (virtualCamera == null)
        {
            virtualCamera = FindObjectOfType<CinemachineVirtualCamera>();
        }

        // 如果未指定目标，默认使用虚拟相机的跟随目标
        if (target == null && virtualCamera != null)
        {
            target = virtualCamera.Follow;
        }

        // 初始化FOV值
        if (virtualCamera != null)
        {
            currentFOV = initialFOV;
            virtualCamera.m_Lens.FieldOfView = currentFOV;
        }
    }

    void Update()
    {
        if (target == null || virtualCamera == null) return;

        // 鼠标右键控制旋转
        if (Input.GetMouseButton(1))
        {
            float mouseX = Input.GetAxis("Mouse X") * rotationSpeed;
            target.Rotate(Vector3.up, -mouseX);
        }

        // 鼠标滚轮控制FOV（远近效果）
        float scroll = Input.GetAxis("Mouse ScrollWheel");
        if (scroll != 0)
        {
            currentFOV -= scroll * fovSensitivity;
            currentFOV = Mathf.Clamp(currentFOV, minFOV, maxFOV);
            virtualCamera.m_Lens.FieldOfView = currentFOV;
        }
    }
}