// HoloPanel.cs
// Zweck: UI-Panel mit Scanlines (UV-Scroll + Puls-Alpha) für Holo-Optik.
using UnityEngine;
using UnityEngine.UI;

public class HoloPanel : MonoBehaviour
{
    [SerializeField] private RawImage bg;                  // Hintergrundbild (Scanlines)
    [Header("Scanline motion")]
    [SerializeField] private Vector2 uvScroll = new Vector2(0f, -0.2f);
    [SerializeField] private float uvTiling = 1.5f;

    [Header("Pulse")]
    [SerializeField] private float pulseSpeed = 1.6f;
    [SerializeField, Range(0f, 1f)] private float minAlpha = 0.35f;
    [SerializeField, Range(0f, 1f)] private float maxAlpha = 0.65f;

    private RectTransform rt;
    private Color baseColor;

    private void Awake()
    {
        if (!bg) bg = GetComponent<RawImage>();
        rt = GetComponent<RectTransform>();
        baseColor = bg ? bg.color : Color.white;

        // Kacheln erlauben
        if (bg && bg.texture) bg.texture.wrapMode = TextureWrapMode.Repeat;
        if (bg) bg.uvRect = new Rect(0, 0, uvTiling, uvTiling);
    }

    private void Update()
    {
        if (!bg) return;

        // UV scrollen
        var r = bg.uvRect;
        float period = (uvTiling <= 0f) ? 1f : 1f / uvTiling;

        r.x = Mathf.Repeat(r.x + uvScroll.x * Time.deltaTime, period);
        r.y = Mathf.Repeat(r.y + uvScroll.y * Time.deltaTime, period);
        bg.uvRect = r;

        // Alpha-Puls
        float t = 0.5f + 0.5f * Mathf.Sin(Time.time * pulseSpeed);
        float a = Mathf.Lerp(minAlpha, maxAlpha, t);
        var c = baseColor; c.a = a;
        bg.color = c;

        // Kleines Wabern
        if (rt) rt.localEulerAngles = new Vector3(0, 0, Mathf.Sin(Time.time * 0.7f) * 1.2f);
    }
}