PGiZ1/Assets/Code/Gameplay/CarController.cs

using Code.DI;
using Code.Input;
using UnityEngine;

namespace Code.Gameplay
{
    [RequireComponent(typeof(Rigidbody))]
    public class CarController : MonoBehaviour
    {
        [Header("Physics")]
        [SerializeField] private float motorForce = 150000;
        [SerializeField] private float brakeForce = 300000;
        [SerializeField] private float maxSteerAngle = 25f;
        [SerializeField] private float turnSpeed = 50;

        [Header("Wheels")]
        [SerializeField] private Transform frontLeftWheel;
        [SerializeField] private Transform frontRightWheel;

        [Header("Camera")]
        [SerializeField] private Transform driverCameraPoint;
        [SerializeField] private Camera mainCamera;
        [SerializeField] private float thirdPersonDistance = 6f;
        [SerializeField] private float thirdPersonHeight = 2.5f;
        [SerializeField] private float cameraFollowSpeed = 4f;

        private Rigidbody _rb;
        private bool _isFirstPerson;
        private IInputService _inputService;
        private float _lastSwitchTime;
        private const float SwitchCooldown = 0.5f;

        private void Awake()
        {
            _rb = GetComponent<Rigidbody>();
        }

        private void Start()
        {
            var container = FindFirstObjectByType<DIContainer>();
            _inputService = container.Resolve<IInputService>();
            SwitchToThirdPerson();
        }

        private void Update()
        {
            if (_inputService.SwitchCameraPressed)
            {
                if (Time.time - _lastSwitchTime >= SwitchCooldown)
                {
                    _isFirstPerson = !_isFirstPerson;
                    if (_isFirstPerson) SwitchToFirstPerson();
                    else SwitchToThirdPerson();
                    _lastSwitchTime = Time.time;
                }
            }
        }

        private void FixedUpdate()
        {
            var input = _inputService.MoveInput;

            var force = transform.forward * (input.y * motorForce);
            _rb.AddForce(force, ForceMode.Force);

            if (Mathf.Abs(input.y) < 0.1f && _rb.linearVelocity.magnitude > 0.3f)
            {
                _rb.AddForce(-_rb.linearVelocity * (brakeForce * Time.fixedDeltaTime), ForceMode.Force);
            }

            var steerInput = input.x;
            if (input.y < 0)
                steerInput = -input.x;

            var steer = steerInput * maxSteerAngle;

            if (frontLeftWheel) frontLeftWheel.localRotation = Quaternion.Euler(0, steer, 0);
            if (frontRightWheel) frontRightWheel.localRotation = Quaternion.Euler(0, steer, 0);

            if (!(_rb.linearVelocity.magnitude > 0.5f)) return;
            
            var turn = steerInput * turnSpeed * Time.fixedDeltaTime;
            _rb.MoveRotation(_rb.rotation * Quaternion.Euler(0, turn, 0));
        }

        private void LateUpdate()
        {
            if (!mainCamera) return;

            if (_isFirstPerson)
            {
                if (driverCameraPoint)
                {
                    mainCamera.transform.localPosition = driverCameraPoint.localPosition;
                    mainCamera.transform.localRotation = driverCameraPoint.localRotation;
                }
            }
            else
            {
                mainCamera.transform.localPosition = new Vector3(0, 5, -8);
                mainCamera.transform.localRotation = Quaternion.Euler(20, 0, 0);
            }
        }

        private void SwitchToFirstPerson()
        {
            if (mainCamera) mainCamera.fieldOfView = 75;
        }

        private void SwitchToThirdPerson()
        {
            if (mainCamera) mainCamera.fieldOfView = 60;
        }
    }
}