using DG.Tweening;
using UnityEngine;
using UnityEngine.UI;

public class UI_SelectSong_AutoPlayToggle : MonoBehaviour
{
    [Header("Wiring")]
    [SerializeField] private Button button;
    [SerializeField] private Toggle toggle;
    [SerializeField] private Image buttonImage;
    [SerializeField] private Text labelText; // Text (Legacy)

    [Header("Tween")]
    [SerializeField] private float tweenDuration = 0.25f;
    [SerializeField] private Ease tweenEase = Ease.OutCubic;

    private static readonly Color32 OnBg = new Color32(0x3A, 0x3A, 0x3A, 0xFF);
    private static readonly Color32 OffBg = new Color32(0xFF, 0xFF, 0xFF, 0xFF);
    private static readonly Color32 OnText = new Color32(0xFF, 0xFF, 0xFF, 0xFF);
    private static readonly Color32 OffText = new Color32(0x3A, 0x3A, 0x3A, 0xFF);

    private void Awake()
    {
        TryAutoWire();
    }

    private void OnEnable()
    {
        TryAutoWire();

        if (button != null)
        {
            button.onClick.RemoveListener(OnClick);
            button.onClick.AddListener(OnClick);
        }
        if (toggle != null)
        {
            toggle.onValueChanged.RemoveListener(OnToggleChanged);
            toggle.onValueChanged.AddListener(OnToggleChanged);
            // Keep UI state consistent with global setting.
            toggle.SetIsOnWithoutNotify(GameConfig.autoPlayEnabled);
        }

        ApplyVisual(GameConfig.autoPlayEnabled, instant: true);
    }

    private void OnDisable()
    {
        if (button != null)
        {
            button.onClick.RemoveListener(OnClick);
        }
        if (toggle != null)
        {
            toggle.onValueChanged.RemoveListener(OnToggleChanged);
        }
        KillTweens();
    }

    public void TryAutoWire()
    {
        button = button != null ? button : GetComponent<Button>();
        toggle = toggle != null ? toggle : GetComponent<Toggle>();
        buttonImage = buttonImage != null ? buttonImage : GetComponent<Image>();
        if (buttonImage == null && toggle != null && toggle.targetGraphic is Image tgImage)
        {
            buttonImage = tgImage;
        }
        labelText = labelText != null ? labelText : GetComponentInChildren<Text>(true);
    }

    private void OnClick()
    {
        bool next = !GameConfig.autoPlayEnabled;
        GameConfig.SetAutoPlayEnabled(next);
        if (toggle != null)
        {
            toggle.SetIsOnWithoutNotify(next);
        }
        ApplyVisual(next, instant: false);
    }

    private void OnToggleChanged(bool isOn)
    {
        GameConfig.SetAutoPlayEnabled(isOn);
        ApplyVisual(isOn, instant: false);
    }

    private void ApplyVisual(bool enabled, bool instant)
    {
        Color targetBg = enabled ? OnBg : OffBg;
        Color targetText = enabled ? OnText : OffText;

        if (instant || !Application.isPlaying || tweenDuration <= 0f)
        {
            if (buttonImage != null) buttonImage.color = targetBg;
            if (labelText != null) labelText.color = targetText;
            return;
        }

        KillTweens();

        if (buttonImage != null)
            buttonImage.DOColor(targetBg, tweenDuration).SetEase(tweenEase);
        if (labelText != null)
            labelText.DOColor(targetText, tweenDuration).SetEase(tweenEase);
    }

    private void KillTweens()
    {
        if (buttonImage != null) buttonImage.DOKill();
        if (labelText != null) labelText.DOKill();
    }
}