using UnityEngine;

namespace Class03
{
    // 입력 방향에 따라 Rigidbody에 힘을 가하는 역할만 합니다.
    [RequireComponent(typeof(Rigidbody), typeof(KeyboardMoveInput))]
    public sealed class BallMotor : MonoBehaviour
    {
        [SerializeField] private float acceleration = 18f;
        [SerializeField] private float maximumSpeed = 7f;
        private Rigidbody body;
        private KeyboardMoveInput input;

        private void Awake()
        {
            body = GetComponent<Rigidbody>();
            input = GetComponent<KeyboardMoveInput>();
        }

        private void FixedUpdate()
        {
            Vector2 direction = input.Direction;
            body.AddForce(new Vector3(direction.x, 0f, direction.y) * acceleration,
                ForceMode.Acceleration);
            Vector3 velocity = body.linearVelocity;
            Vector3 horizontal = Vector3.ClampMagnitude(new Vector3(velocity.x, 0f, velocity.z), maximumSpeed);
            body.linearVelocity = new Vector3(horizontal.x, velocity.y, horizontal.z);
        }
    }
}