using UnityEngine;
using UnityEngine.UI;

public class AimArrowController : MonoBehaviour
{
    public Image arrow;
    public float m_AngleSpeed = 1.5f;
    public Transform projectileParent;

    Vector2 startPos;
    bool isAiming;

    void Start()
    {
        arrow.enabled = false;
    }

    public void OnAimStart(Vector2 screenPos)
    {
        isAiming = true;
        arrow.enabled = true;
        UpdateArrow(screenPos);
    }

    public void OnAimDrag(Vector2 screenPos)
    {
        if (!isAiming) return;
        UpdateArrow(screenPos);
    }

    public void OnAimEnd()
    {
        arrow.enabled = false;
        isAiming = false;

        ProjectileMgr.Ins.Get(arrow.transform).Set();
    }

    void UpdateArrow(Vector2 currentPos)
    {
        Vector2 dir = currentPos - startPos;
        if (dir.sqrMagnitude < 0.001f) return;

        float angle = (Mathf.Atan2(dir.y, dir.x) * Mathf.Rad2Deg - 45f) * m_AngleSpeed;
        angle = Mathf.Clamp(angle, -60f, 60f);
        arrow.rectTransform.rotation = Quaternion.Euler(0, 0, angle);
    }
}