using Cinemachine;
using Unity.Mathematics;
using UnityEngine;

public class ShootingRangeCameraAspectAdjustment : MonoBehaviour
{
    [SerializeField] private CinemachineVirtualCamera virtualCamera;
    [SerializeField] private float aspectUpperLimit = 2.2f;
    private void Start()
    {
        if (virtualCamera == null)
        {
            Debug.LogError("No Virtual Camera found.", this);
            return;
        }
        float aspect = (float)Screen.height / Screen.width;
        // Debug.Log($"[FOV]height: {Screen.height}, width: {Screen.width}, aspect: {aspect}]");
        var oldFov = virtualCamera.m_Lens.FieldOfView;
        // Debug.Log($"[FOV]old fov: {oldFov}");
        if (aspect >= 16.0 / 9)
        {
            var newFov = 2 * math.atan(math.tan(oldFov * 0.5f / 180 * math.PI) * 9 / 16 * (aspect < aspectUpperLimit ? aspect : aspectUpperLimit)) / math.PI * 180;
            // Debug.Log($"[FOV]new fov raw{newFov}");
            // while (newFov < 0)
            //     newFov += 180;
            // Debug.Log($"[FOV]new fov{newFov}");
            virtualCamera.m_Lens.FieldOfView = newFov;
        }
    }       
}