using UnityEngine;
using UnityEngine.UI;

public class IntroButtonPulse : MonoBehaviour
{
    [Header("Scale Pulse")]
    [SerializeField] private float scaleAmount = 0.06f;
    [SerializeField] private float pulseSpeed = 2.0f;

    [Header("Color Pulse")]
    [SerializeField] private bool useColorPulse = true;
    [SerializeField] private Image targetImage;
    [SerializeField] private Color normalColor = Color.white;
    [SerializeField] private Color glowColor = new Color(1f, 0.85f, 0.95f, 1f);

    private Vector3 startScale;

    private void Awake()
    {
        startScale = transform.localScale;

        if (targetImage == null)
        {
            targetImage = GetComponent<Image>();
        }
    }

    private void Update()
    {
        UpdateScalePulse();
        UpdateColorPulse();
    }

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

        transform.localScale = startScale * scale;
    }

    private void UpdateColorPulse()
    {
        if (!useColorPulse)
            return;

        if (targetImage == null)
            return;

        float t = (Mathf.Sin(Time.time * pulseSpeed) + 1f) * 0.5f;
        targetImage.color = Color.Lerp(normalColor, glowColor, t);
    }
}