using UnityEngine;

public class Projectile : MonoBehaviour
{
    public float speed = 12f;
    public int maxBounce = 3;
    public float radius = 0.1f;   // 충돌 보정용

    Vector2 dir;
    int bounceCount;

    public void Set()
    {
        dir = transform.up.normalized;
        bounceCount = maxBounce;
    }

    void Update()
    {
        float moveDist = speed * Time.deltaTime;

        // 🔍 이동 방향으로 Raycast
        RaycastHit2D hit = Physics2D.CircleCast(
            transform.position,
            radius,
            dir,
            moveDist
        );

        if (hit.collider != null)
        {
            // 충돌 지점으로 이동
            transform.position = hit.point + hit.normal * radius;

            Bounce(hit.normal);
        }
        else
        {
            transform.position += (Vector3)(dir * moveDist);
        }
    }

    void Bounce(Vector2 normal)
    {
        bounceCount--;

        if (bounceCount < 0)
        {
            Destroy(gameObject);
            return;
        }

        // 🔥 반사 방향 계산
        dir = Vector2.Reflect(dir, normal).normalized;

        // 반사 후 방향에 맞게 회전
        float angle = Mathf.Atan2(dir.y, dir.x) * Mathf.Rad2Deg - 90f;
        transform.rotation = Quaternion.Euler(0, 0, angle);
    }
}