using UnityEngine;

public class CameraController : MonoBehaviour
{
    [Header("Target")]
    [SerializeField] Transform target;

    [Header("Zoom Settings")]
    [SerializeField] float baseDistance = 6f;
    [SerializeField] float maxDistance = 12f;
    [SerializeField] float zoomSpeed = 5f;

    [Header("Follow Settings")]
    [SerializeField] float followSmoothness = 5f;
    [SerializeField] Vector3 heightOffset = new Vector3(0, 3f, 0); // optional vertical offset

    private Rigidbody targetRb;
    private float currentDistance;
    public Camera mainCam;
    private void Start()
    {
        Application.targetFrameRate = 120;
        if (target == null)
        {
            Debug.LogError("CameraController: Target not assigned!");
            enabled = false;
            return;
        }

        targetRb = target.GetComponent<Rigidbody>();
        if (targetRb == null)
        {
            Debug.LogError("CameraController: Target must have a Rigidbody.");
            enabled = false;
            return;
        }
        mainCam=GetComponent<Camera>();
        currentDistance = baseDistance;
    }

    private void LateUpdate()
    {
        float speed = targetRb.velocity.magnitude;

        // Zoom out based on speed
        float targetDistance = Mathf.Lerp(baseDistance, maxDistance, speed / 30f);
        currentDistance = Mathf.Lerp(currentDistance, targetDistance, Time.deltaTime * zoomSpeed);

        // Calculate camera position: behind the target
        Vector3 followPos = target.position + heightOffset - target.forward * currentDistance;

        // Smoothly move camera
        transform.position = Vector3.Lerp(transform.position, followPos, Time.deltaTime * followSmoothness);

        // Look at the target (optional slight offset)
        transform.LookAt(target.position + heightOffset * 0.5f);
    }
}