using UnityEngine;

[RequireComponent(typeof(Camera))]
public class CameraController : MonoBehaviour
{
    [Header("Target")]
    [Tooltip("If set, camera will follow this Transform. Otherwise it will auto-find the local player.")]
    public Transform target;

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

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

    [Header("FOV Boost Settings")]
    [SerializeField] private float baseFOV = 60f;
    [SerializeField] private float boostFOV = 75f;
    [SerializeField] private float fovLerpSpeed = 5f;

    private float currentDistance;
    private Rigidbody targetRb;
    private Camera cam;
    private MotionBlur motionBlur;

    private bool isBoosting = false;

    private void Awake()
    {
        motionBlur = GetComponent<MotionBlur>();
        cam = GetComponent<Camera>();
    }

    private void Start()
    {
        Application.targetFrameRate = 120;
        currentDistance = baseDistance;

        if (target != null)
        {
            InitializeTarget();
        }

        transform.parent = null;
    }

    public void InitializeTarget()
    {
        targetRb = target.GetComponent<Rigidbody>();
        motionBlur.vehicle = target.GetComponent<VehicleController>();

        if (targetRb == null)
        {
            Debug.LogError("CameraController: Assigned target has no Rigidbody component.", this);
            enabled = false;
            return;
        }

        Debug.Log("CameraController: Following manually assigned target.", this);
    }

    private void LateUpdate()
    {
        if (target == null || targetRb == null) return;

        // Dynamic zoom distance based on speed
        float speed = targetRb.velocity.magnitude;
        float targetDistance = Mathf.Lerp(baseDistance, maxDistance, speed / 30f);
        currentDistance = Mathf.Lerp(currentDistance, targetDistance, Time.deltaTime * zoomSpeed);

        Vector3 followPos = target.position + heightOffset - target.forward * currentDistance;
        transform.position = Vector3.Lerp(transform.position, followPos, Time.deltaTime * followSmoothness);
        transform.LookAt(target.position + heightOffset * 0.5f);

        // FOV Kick Logic
        float targetFOV = isBoosting ? boostFOV : baseFOV;
        cam.fieldOfView = Mathf.Lerp(cam.fieldOfView, targetFOV, Time.deltaTime * fovLerpSpeed);
    }

    public void SetBoosting(bool boosting)
    {
        isBoosting = boosting;
    }
}