using UnityEngine;

namespace OTG.Lab06.Characters
{
    [RequireComponent(typeof(CharacterController))]
    public sealed class PlayerController : MonoBehaviour
    {
        [SerializeField] private float moveSpeed = 6f;
        [SerializeField] private float rotationSpeed = 12f;
        [SerializeField] private float gravity = -24f;
        [SerializeField] private Transform cameraTransform;

        private CharacterController characterController;
        private float verticalVelocity;

        private void Awake()
        {
            characterController = GetComponent<CharacterController>();
        }

        private void Start()
        {
            if (cameraTransform == null && Camera.main != null)
            {
                cameraTransform = Camera.main.transform;
            }
        }

        private void Update()
        {
            Vector2 input = new Vector2(Input.GetAxisRaw("Horizontal"), Input.GetAxisRaw("Vertical"));
            input = Vector2.ClampMagnitude(input, 1f);

            Vector3 forward = cameraTransform == null ? Vector3.forward : cameraTransform.forward;
            Vector3 right = cameraTransform == null ? Vector3.right : cameraTransform.right;
            forward.y = 0f;
            right.y = 0f;
            forward.Normalize();
            right.Normalize();

            Vector3 move = forward * input.y + right * input.x;
            if (move.sqrMagnitude > 0.01f)
            {
                Quaternion targetRotation = Quaternion.LookRotation(move, Vector3.up);
                transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, rotationSpeed * Time.deltaTime);
            }

            if (characterController.isGrounded && verticalVelocity < 0f)
            {
                verticalVelocity = -2f;
            }

            verticalVelocity += gravity * Time.deltaTime;
            Vector3 velocity = move * moveSpeed + Vector3.up * verticalVelocity;
            characterController.Move(velocity * Time.deltaTime);
        }
    }
}