//using UnityEngine;
//using CnControls;

//public enum GroundCheck
//{
//    RayCast,
//    SphereCaste
//}

//public class VehicleController : MonoBehaviour
//{
//    // Existing serialized and private fields...

//    // (unchanged fields)
//    [SerializeField] float _currentSpeed = 0f;
//    [SerializeField] float _turnAI = 0f;
//    [SerializeField] bool _isAI = false;
//    [SerializeField] GroundCheck _groundCheck = GroundCheck.RayCast;
//    [SerializeField] LayerMask _drivableSurface = -1;
//    [SerializeField] float _maxSpeed = 100f;
//    [SerializeField] float _normalAccelaration = 10f;
//    [SerializeField] float _steering = 10f;
//    [SerializeField] float _gravity = 9.8f;
//    [SerializeField] float _downforce = 5f;
//    [SerializeField] float _brakeAngle = 30f;
//    [SerializeField] float _stoppingDistance = 5f;
//    [SerializeField] bool _airControl = false;
//    [SerializeField] AnimationCurve _frictionCurve = new AnimationCurve();
//    [SerializeField] AnimationCurve _turnCurve = new AnimationCurve();

//    [SerializeField, Range(0, 10)] float _bodyTilt = 0.5f;
//    [SerializeField] Transform _bodyMesh = null;
//    [SerializeField, Range(0.1f, 1f)] float _skidWidth = 0.25f;
//    [SerializeField, Range(0.1f, 10f)] float _skidTime = 5f;
//    [SerializeField] Transform _wheelFL = null;
//    [SerializeField] Transform _wheelFR = null;
//    [SerializeField] Transform _wheelRL = null;
//    [SerializeField] Transform _wheelRR = null;
//    [SerializeField] Transform _wheelFLAxel = null;
//    [SerializeField] Transform _wheelFRAxel = null;
//    [SerializeField] GameObject speedLines = null;

//    [SerializeField] Rigidbody _sphereRB = null;
//    [SerializeField] PhysicMaterial _frictionMaterial = null;
//    [SerializeField] Transform _followTarget = null;

//    // Internal variables
//    private bool _canRun = false;
//    private bool _grounded = false;
//    private bool _turboPlayed = true;
//    public bool _useNos = false;

//    private float _speed = 0f;
//    private float _brake = 0f;
//    private float _accelaration = 0f;
//    private float _sign = 0f;
//    private float _horizontalInput = 0f;
//    private float _verticalInput = 0f;
//    private float _radius = 0f;
//    private float _desiredTurning = 0f;
//    private float _reachedTargetDistance = 0f;
//    private float _distToTarget = 0f;
//    private float _dot = 0f;
//    private float _angleToMove = 0f;
//    private float _maxDistance = 0f;
//    private float _counterSteering = 0f;
//    private float _turnMultiplyer = 0f;

//    private Vector3 _carVelocity = Vector3.zero;
//    private Vector3 _myDir = Vector3.zero;
//    private Vector3 _aimedDir = Vector3.zero;
//    private Vector3 _aimedPoint = Vector3.zero;
//    private Vector3 _dirToMovePos = Vector3.zero;

//    private RaycastHit _hit;
//    private Rigidbody _carBody = null;
//    private VehicleTracker _vehicleTracker = null;

//    public bool IsAI => _isAI;
//    public bool CanRun => _canRun;
//    public bool IsGrounded => _grounded;
//    public float SkidWidth => _skidWidth;
//    public float SkidTime => _skidTime;
//    public float Speed => _carVelocity.z;
//    public float MaxSpeed => _maxSpeed;
//    public bool IsTouchDown => _horizontalInput != 0 || _verticalInput != 0 || _useNos;
//    public NOSController nosController;
//    internal float Steering
//    {
//        get => _steering;
//        set => _steering = value;
//    }

//    public Vector3 CarVelocity => _carVelocity;
//    public Transform FollowTarget => _followTarget;
//    [Range(0.3f, 1f)] public float steeringFactor = 1f;

//    private void Awake()
//    {
//        _carBody = GetComponent<Rigidbody>();
//        _vehicleTracker = GetComponent<VehicleTracker>();
//        _radius = _sphereRB.GetComponent<SphereCollider>().radius;
//        nosController = GetComponent<NOSController>();
//        _maxDistance = _radius + 0.5f;
//        StartVehicle();
//    }

//    public void StartVehicle()
//    {
//        _canRun = true;
//        if (!_isAI)
//            _accelaration = _normalAccelaration;
//    }

//    public void RaceFinish()
//    {
//        _canRun = false;
//        _carVelocity = Vector3.zero;
//        _currentSpeed = 0f;
//        _turnAI = 0f;
//    }

//    private void Update()
//    {
//        if (!_canRun) return;
//        Visuals();
//        Inputs();
//        Controls();
//    }

//    private void Inputs()
//    {
//        _verticalInput = CnInputManager.GetAxis("Vertical");
//        _horizontalInput = CnInputManager.GetAxis("Horizontal");
//    }

//    private void Visuals()
//    {
//        _counterSteering = (Mathf.Abs(_carVelocity.x) > 20f) ? -1f : 1f;

//        if (_wheelFL) _wheelFL.localRotation = Quaternion.Slerp(_wheelFL.localRotation, Quaternion.Euler(0, 45f * _counterSteering * _turnAI, 0), 0.1f);
//        if (_wheelFR) _wheelFR.localRotation = Quaternion.Slerp(_wheelFR.localRotation, Quaternion.Euler(0, 45f * _counterSteering * _turnAI, 0), 0.1f);
//        _wheelFLAxel?.Rotate(Vector3.right * (Speed * 0.75f));
//        _wheelFRAxel?.Rotate(Vector3.right * (Speed * 0.75f));
//        _wheelRL?.Rotate(Vector3.right * (Speed * 0.75f));
//        _wheelRR?.Rotate(Vector3.right * (Speed * 0.75f));

//        if (_bodyMesh)
//        {
//            if (_carVelocity.z > 1)
//                _bodyMesh.localRotation = Quaternion.Slerp(_bodyMesh.localRotation,
//                    Quaternion.Euler(Mathf.Lerp(0, -5, _carVelocity.z / _maxSpeed), 0, Mathf.Clamp(_desiredTurning * _turnAI, -_bodyTilt, _bodyTilt)), 0.05f);
//            else
//                _bodyMesh.localRotation = Quaternion.Slerp(_bodyMesh.localRotation, Quaternion.identity, 0.05f);
//        }

//        if (speedLines)
//            speedLines.SetActive(_carVelocity.z > 10);
//    }

//    private void Controls()
//    {
//        _aimedPoint = _vehicleTracker.TargetPos;
//        _aimedPoint.y = transform.position.y;
//        _aimedDir = (_aimedPoint - transform.position).normalized;
//        _myDir = transform.forward;
//        _myDir.Normalize();

//        _desiredTurning = Mathf.Abs(Vector3.Angle(_myDir, Vector3.ProjectOnPlane(_aimedDir, transform.up)));
//        _distToTarget = Vector3.Distance(transform.position, _vehicleTracker.TargetPos);
//        _dirToMovePos = (_vehicleTracker.TargetPos - transform.position).normalized;
//        _dot = Vector3.Dot(transform.forward, _dirToMovePos);
//        _angleToMove = Vector3.Angle(transform.forward, _dirToMovePos);

//        // ✨ No more full brake; allow drift
//        _brake = 0f;

//        if (_distToTarget > _reachedTargetDistance)
//        {
//            _speed = _dot > 0f ? _verticalInput : (_distToTarget > 5f ? _verticalInput : -1f);
//            _turnAI = (Vector3.SignedAngle(transform.forward, _dirToMovePos, Vector3.up) > 0f ? 1f : -1f)
//                    * _turnCurve.Evaluate(_desiredTurning / 160f);
//        }
//        else
//        {
//            _turnAI = 0f;
//        }

//        if (!_isAI)
//            _turnAI += _horizontalInput;

//        _currentSpeed = Mathf.Round(Speed);
//    }

//    private void FixedUpdate()
//    {
//        if (!_canRun) return;
//        Grounded();
//        Movement();
//    }

//    private void Grounded()
//    {
//        if (_groundCheck == GroundCheck.RayCast)
//        {
//            _grounded = Physics.Raycast(_sphereRB.position, Vector3.down, out _hit, _maxDistance, _drivableSurface)
//                || Physics.Raycast(_sphereRB.position + Vector3.forward * 3f, Vector3.down, out _hit, _maxDistance, _drivableSurface)
//                || Physics.Raycast(_sphereRB.position - Vector3.forward * 3f, Vector3.down, out _hit, _maxDistance, _drivableSurface);
//        }
//        else if (_groundCheck == GroundCheck.SphereCaste)
//        {
//            _grounded = Physics.SphereCast(_sphereRB.position + _radius * Vector3.up, _radius + 0.25f, -transform.up, out _hit, _maxDistance, _drivableSurface);
//        }
//        else _grounded = false;
//    }

//    private void Movement()
//    {
//        _carVelocity = _carBody.transform.InverseTransformDirection(_carBody.velocity);

//        // 🎯 Dynamic friction drift logic
//        if (_angleToMove > _brakeAngle && _carVelocity.z > 15f)
//        {
//            _frictionMaterial.dynamicFriction = 0.01f; // low grip drift
//        }
//        else
//        {
//            _frictionMaterial.dynamicFriction = _frictionCurve.Evaluate(Mathf.Abs(_carVelocity.x / 100));
//        }

//        _turnMultiplyer = _turnCurve.Evaluate(_carVelocity.magnitude / _maxSpeed);

//        if (IsGrounded)
//        {
//            _sign = Mathf.Sign(_carVelocity.z);

//            if (Mathf.Abs(_speed) > 0.1f)
//                _carBody.AddTorque(Vector3.up * (_turnAI * _sign * _steering * 100f * _turnMultiplyer * steeringFactor));

//            // ✨ No braking-based constraint
//            if (Mathf.Abs(_speed) > 0.1f)
//                _sphereRB.velocity = Vector3.Lerp(_sphereRB.velocity, _carBody.transform.forward * (_speed * _maxSpeed), _accelaration / 10f * Time.fixedDeltaTime);

//            _sphereRB.AddForce(-transform.up * (_downforce * _sphereRB.mass));
//            _carBody.MoveRotation(Quaternion.Slerp(_carBody.rotation, Quaternion.FromToRotation(_carBody.transform.up, _hit.normal) * _carBody.transform.rotation, 0.12f));
//        }
//        else
//        {
//            if (_airControl)
//                _carBody.AddTorque(Vector3.up * (_turnAI * _steering * 100f * _turnMultiplyer * steeringFactor));

//            _sphereRB.velocity = Vector3.Lerp(_sphereRB.velocity, (_carBody.transform.forward * (_speed * _maxSpeed)) + Vector3.down * (_gravity * 9.8f), (_accelaration / 25f) * Time.deltaTime);
//        }
//    }

//    internal void Sleep()
//    {
//        this.enabled = false;
//        _sphereRB.gameObject.SetActive(false);
//        _sphereRB.velocity = Vector3.zero;
//        _sphereRB.Sleep();
//        _carBody.velocity = Vector3.zero;
//        _carBody.Sleep();
//    }
//    public void UseNOS()
//    {
//        UseNOS(true);
//        nosController._useNOS = true;
//    }
//    public void UseNOS(bool use, float acceleration = 10f)
//    {
//        _useNos = use;
//        _accelaration = use ? _accelaration + acceleration : _normalAccelaration;
//        Debug.Log("accelaration: " + _accelaration);
//    }
//    internal void WakeUp()
//    {
//        this.enabled = true;
//        _sphereRB.gameObject.SetActive(true);
//    }
//}

using UnityEngine;
using CnControls;

public enum SurfaceDetection
{
    RayCast,
    SphereCast
}

public class VehicleController : MonoBehaviour
{
    [SerializeField] float currentSpeed = 0f;
    [SerializeField] float steeringAI = 0f;
    [SerializeField] bool isAIControlled = false;
    [SerializeField] SurfaceDetection groundDetection = SurfaceDetection.RayCast;
    [SerializeField] LayerMask driveableSurface = -1;
    [SerializeField] float maxSpeed = 100f;
    [SerializeField] float baseAcceleration = 10f;
    [SerializeField] float steeringSensitivity = 10f;
    [SerializeField] float gravityForce = 9.8f;
    [SerializeField] float downforce = 5f;
    [SerializeField] float brakeThreshold = 30f;
    [SerializeField] float targetStoppingDistance = 5f;
    [SerializeField] bool allowAirControl = false;
    [SerializeField] AnimationCurve _frictionCurve = new AnimationCurve();
    [SerializeField] AnimationCurve _turnCurve = new AnimationCurve();

    [SerializeField, Range(0, 10)] float bodyTiltAmount = 0.5f;
    [SerializeField] Transform carBodyVisual = null;
    [SerializeField, Range(0.1f, 1f)] float skidMarkWidth = 0.25f;
    [SerializeField, Range(0.1f, 10f)] float skidMarkDuration = 5f;
    [SerializeField] Transform wheelFrontLeft = null;
    [SerializeField] Transform wheelFrontRight = null;
    [SerializeField] Transform wheelRearLeft = null;
    [SerializeField] Transform wheelRearRight = null;
    [SerializeField] Transform frontLeftAxle = null;
    [SerializeField] Transform frontRightAxle = null;
    [SerializeField] GameObject speedVisualEffects = null;

    [SerializeField] Rigidbody sphereRigidbody = null;
    [SerializeField] PhysicMaterial wheelFrictionMaterial = null;
    [SerializeField] Transform cameraFollowTarget = null;

    private bool isRunning = false;
    private bool isOnGround = false;
    private bool hasTurboBoost = true;
    public bool nosActive = false;

    private float accelerationInput = 0f;
    private float brakeInput = 0f;
    private float accelerationForce = 0f;
    private float steeringSign = 0f;
    private float inputHorizontal = 0f;
    private float inputVertical = 0f;
    private float wheelRadius = 0f;
    private float desiredTurnAngle = 0f;
    private float distanceToTarget = 0f;
    private float angleDifference = 0f;
    private float maxGroundDistance = 0f;
    private float counterSteerValue = 0f;
    private float steeringMultiplier = 0f;

    private Vector3 velocityLocal = Vector3.zero;
    private Vector3 forwardDirection = Vector3.zero;
    private Vector3 directionToTarget = Vector3.zero;
    private Vector3 movementDirection = Vector3.zero;

    private RaycastHit surfaceHit;
    private Rigidbody vehicleRigidbody = null;
    private VehicleTracker targetTracker = null;

    public bool AIControlled => isAIControlled;
    public bool Running => isRunning;
    public bool Grounded => isOnGround;
    public float SkidWidth => skidMarkWidth;
    public float SkidDuration => skidMarkDuration;
    public float CurrentSpeed => velocityLocal.z;
    public float MaximumSpeed => maxSpeed;
    public bool InputsActive => inputHorizontal != 0 || inputVertical != 0 || nosActive;
    public NOSController nosController;
    internal float SteeringSensitivity
    {
        get => steeringSensitivity;
        set => steeringSensitivity = value;
    }

    public Vector3 LocalVelocity => velocityLocal;
    public Transform FollowTarget => cameraFollowTarget;
    [Range(0.3f, 1f)] public float steeringFactor = 1f;

    private void Awake()
    {
        vehicleRigidbody = GetComponent<Rigidbody>();
        targetTracker = GetComponent<VehicleTracker>();
        wheelRadius = sphereRigidbody.GetComponent<SphereCollider>().radius;
        nosController = GetComponent<NOSController>();
        maxGroundDistance = wheelRadius + 0.5f;
        InitializeVehicle();
    }

    public void InitializeVehicle()
    {
        isRunning = true;
        if (!isAIControlled)
            accelerationForce = baseAcceleration;
    }

    public void StopVehicle()
    {
        isRunning = false;
        velocityLocal = Vector3.zero;
        currentSpeed = 0f;
        steeringAI = 0f;
    }

    private void Update()
    {
        if (!isRunning) return;
        UpdateVisuals();
        ProcessInputs();
        ApplyControls();
    }

    private void ProcessInputs()
    {
        inputVertical = CnInputManager.GetAxis("Vertical");
        inputHorizontal = CnInputManager.GetAxis("Horizontal");
    }

    private void UpdateVisuals()
    {
        counterSteerValue = (Mathf.Abs(velocityLocal.x) > 20f) ? -1f : 1f;

        if (wheelFrontLeft) wheelFrontLeft.localRotation = Quaternion.Slerp(wheelFrontLeft.localRotation, Quaternion.Euler(0, 45f * counterSteerValue * steeringAI, 0), 0.1f);
        if (wheelFrontRight) wheelFrontRight.localRotation = Quaternion.Slerp(wheelFrontRight.localRotation, Quaternion.Euler(0, 45f * counterSteerValue * steeringAI, 0), 0.1f);

        frontLeftAxle?.Rotate(Vector3.right * (CurrentSpeed * 0.75f));
        frontRightAxle?.Rotate(Vector3.right * (CurrentSpeed * 0.75f));
        wheelRearLeft?.Rotate(Vector3.right * (CurrentSpeed * 0.75f));
        wheelRearRight?.Rotate(Vector3.right * (CurrentSpeed * 0.75f));

        if (carBodyVisual)
        {
            if (velocityLocal.z > 1)
                carBodyVisual.localRotation = Quaternion.Slerp(carBodyVisual.localRotation,
                    Quaternion.Euler(Mathf.Lerp(0, -5, velocityLocal.z / maxSpeed), 0, Mathf.Clamp(desiredTurnAngle * steeringAI, -bodyTiltAmount, bodyTiltAmount)), 0.05f);
            else
                carBodyVisual.localRotation = Quaternion.Slerp(carBodyVisual.localRotation, Quaternion.identity, 0.05f);
        }

        if (speedVisualEffects)
            speedVisualEffects.SetActive(velocityLocal.z > 10);
    }

    private void ApplyControls()
    {
        Vector3 targetPoint = targetTracker.TargetPos;
        targetPoint.y = transform.position.y;
        directionToTarget = (targetPoint - transform.position).normalized;
        forwardDirection = transform.forward.normalized;

        desiredTurnAngle = Mathf.Abs(Vector3.Angle(forwardDirection, Vector3.ProjectOnPlane(directionToTarget, transform.up)));
        distanceToTarget = Vector3.Distance(transform.position, targetTracker.TargetPos);
        movementDirection = (targetTracker.TargetPos - transform.position).normalized;
        float alignment = Vector3.Dot(transform.forward, movementDirection);
        angleDifference = Vector3.Angle(transform.forward, movementDirection);

        brakeInput = 0f;

        if (distanceToTarget > targetStoppingDistance)
        {
            accelerationInput = alignment > 0f ? inputVertical : (distanceToTarget > 5f ? inputVertical : -1f);
            steeringAI = (Vector3.SignedAngle(transform.forward, movementDirection, Vector3.up) > 0f ? 1f : -1f)
                        * _turnCurve.Evaluate(desiredTurnAngle / 160f);
        }
        else
        {
            steeringAI = 0f;
        }

        if (!isAIControlled)
            steeringAI += inputHorizontal;

        currentSpeed = Mathf.Round(CurrentSpeed);
    }

    private void FixedUpdate()
    {
        if (!isRunning) return;
        CheckGround();
        HandleMovement();
    }

    private void CheckGround()
    {
        if (groundDetection == SurfaceDetection.RayCast)
        {
            isOnGround = Physics.Raycast(sphereRigidbody.position, Vector3.down, out surfaceHit, maxGroundDistance, driveableSurface)
                      || Physics.Raycast(sphereRigidbody.position + Vector3.forward * 3f, Vector3.down, out surfaceHit, maxGroundDistance, driveableSurface)
                      || Physics.Raycast(sphereRigidbody.position - Vector3.forward * 3f, Vector3.down, out surfaceHit, maxGroundDistance, driveableSurface);
        }
        else if (groundDetection == SurfaceDetection.SphereCast)
        {
            isOnGround = Physics.SphereCast(sphereRigidbody.position + wheelRadius * Vector3.up, wheelRadius + 0.25f, -transform.up, out surfaceHit, maxGroundDistance, driveableSurface);
        }
        else isOnGround = false;
    }

    private void HandleMovement()
    {
        velocityLocal = vehicleRigidbody.transform.InverseTransformDirection(vehicleRigidbody.velocity);

        if (angleDifference > brakeThreshold && velocityLocal.z > 15f)
        {
            wheelFrictionMaterial.dynamicFriction = 0.01f;
        }
        else
        {
            wheelFrictionMaterial.dynamicFriction = _frictionCurve.Evaluate(Mathf.Abs(velocityLocal.x / 100));
        }

        steeringMultiplier = _turnCurve.Evaluate(velocityLocal.magnitude / maxSpeed);

        if (Grounded)
        {
            steeringSign = Mathf.Sign(velocityLocal.z);

            if (Mathf.Abs(accelerationInput) > 0.1f)
                vehicleRigidbody.AddTorque(Vector3.up * (steeringAI * steeringSign * steeringSensitivity * 100f * steeringMultiplier * steeringFactor));

            if (Mathf.Abs(accelerationInput) > 0.1f)
                sphereRigidbody.velocity = Vector3.Lerp(sphereRigidbody.velocity, vehicleRigidbody.transform.forward * (accelerationInput * maxSpeed), accelerationForce / 10f * Time.fixedDeltaTime);

            sphereRigidbody.AddForce(-transform.up * (downforce * sphereRigidbody.mass));
            vehicleRigidbody.MoveRotation(Quaternion.Slerp(vehicleRigidbody.rotation, Quaternion.FromToRotation(vehicleRigidbody.transform.up, surfaceHit.normal) * vehicleRigidbody.transform.rotation, 0.12f));
        }
        else
        {
            if (allowAirControl)
                vehicleRigidbody.AddTorque(Vector3.up * (steeringAI * steeringSensitivity * 100f * steeringMultiplier * steeringFactor));

            sphereRigidbody.velocity = Vector3.Lerp(sphereRigidbody.velocity, (vehicleRigidbody.transform.forward * (accelerationInput * maxSpeed)) + Vector3.down * (gravityForce * 9.8f), (accelerationForce / 25f) * Time.deltaTime);
        }
    }

    internal void DisableVehicle()
    {
        enabled = false;
        sphereRigidbody.gameObject.SetActive(false);
        sphereRigidbody.velocity = Vector3.zero;
        sphereRigidbody.Sleep();
        vehicleRigidbody.velocity = Vector3.zero;
        vehicleRigidbody.Sleep();
    }

    public void ActivateNOS()
    {
        ActivateNOS(true);
        nosController._isBoosting = true;
    }

    public void ActivateNOS(bool active, float bonusAcceleration = 10f)
    {
        nosActive = active;
        accelerationForce = active ? accelerationForce + bonusAcceleration : baseAcceleration;
        Debug.Log("Acceleration updated: " + accelerationForce);
    }

    internal void EnableVehicle()
    {
        enabled = true;
        sphereRigidbody.gameObject.SetActive(true);
    }
}