using UnityEngine;

[RequireComponent(typeof(SpriteRenderer))]
public class GlowPulse2D : MonoBehaviour
{
    [Header("Alpha Glow")]
    public float minAlpha = 0.25f;
    public float maxAlpha = 0.65f;
    public float pulseSpeed = 2f;

    [Header("Scale Glow")]
    public float minScale = 0.95f;
    public float maxScale = 1.12f;

    private SpriteRenderer sr;
    private Color baseColor;
    private Vector3 baseScale;

    private void Awake()
    {
        sr = GetComponent<SpriteRenderer>();
        baseColor = sr.color;
        baseScale = transform.localScale;
    }

    private void Update()
    {
        float t = (Mathf.Sin(Time.time * pulseSpeed) + 1f) * 0.5f;

        Color c = baseColor;
        c.a = Mathf.Lerp(minAlpha, maxAlpha, t);
        sr.color = c;

        float scale = Mathf.Lerp(minScale, maxScale, t);
        transform.localScale = baseScale * scale;
    }
}