using UnityEngine;
using TMPro;

public class ArtworkLabel : MonoBehaviour
{
    public TMP_Text titleText;
    public TMP_Text artistText;
    public bool alwaysVisible = true;

    float _target = 1f, _current = 0f;
    Camera _cam;

    void Start()
    {
        _cam = Camera.main;
        _current = _target = alwaysVisible ? 1f : 0f;
        SetAlpha(_current);
    }

    public void SetText(string title, string artist)
    {
        if (titleText)  titleText.text  = title  ?? "";
        if (artistText) artistText.text = artist ?? "";
    }

    public void Show() => _target = 1f;
    public void Hide() => _target = alwaysVisible ? 1f : 0f;

    void Update()
    {
        if (_cam)
        {
            var d = _cam.transform.position - transform.position; d.y = 0;
            if (d.sqrMagnitude > 0.001f) transform.rotation = Quaternion.LookRotation(-d);
        }
        _current = Mathf.MoveTowards(_current, _target, 4f * Time.deltaTime);
        SetAlpha(_current);
    }

    void SetAlpha(float a)
    {
        if (titleText)  { var c = titleText.color;  c.a = a; titleText.color  = c; }
        if (artistText) { var c = artistText.color; c.a = a; artistText.color = c; }
    }
}