using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

public class MainMenuController : MonoBehaviour
{
    [Header("Root UI")]
    [SerializeField] private CanvasGroup rootCanvas;
    [SerializeField] private GameObject mainPanel;
    [SerializeField] private GameObject optionsPanel;

    [Header("Input")]
    [SerializeField] private InputActionReference openMenuAction;

    [Header("Restart")]
    [SerializeField] private int restartSceneIndex = 0;

    [Header("Option Toggles (optional)")]
    [SerializeField] private Toggle sfxToggle;
    [SerializeField] private Toggle vfxToggle;
    [SerializeField] private Toggle musicToggle;
    [SerializeField] private Toggle scoreToggle;

    private bool isOpen;

    private void Awake()
    {
        // IMPORTANT: Object stays ACTIVE in hierarchy.
        // We only hide visually here.
        if (rootCanvas != null)
        {
            rootCanvas.alpha = 0f;
            rootCanvas.interactable = false;
            rootCanvas.blocksRaycasts = false;
        }

        if (mainPanel) mainPanel.SetActive(true);
        if (optionsPanel) optionsPanel.SetActive(false);
    }

    private void Start()
    {
        // keep internal state in sync
        if (rootCanvas != null)
            isOpen = rootCanvas.alpha >= 0.95f;

        var s = GameSettingsManager.Instance;
        if (s != null)
        {
            if (sfxToggle) sfxToggle.isOn = s.SfxEnabled;
            if (vfxToggle) vfxToggle.isOn = s.VfxEnabled;
            if (musicToggle) musicToggle.isOn = s.MusicEnabled;
            if (scoreToggle) scoreToggle.isOn = s.ScoreEnabled;
        }
    }

    private void OnEnable()
    {
        if (openMenuAction != null)
        {
            var a = openMenuAction.action;
            a.actionMap?.Enable();       // ensure map is on
            a.started += OnOpenMenu;     // toggle on key down
            a.Enable();
        }
    }

    private void OnDisable()
    {
        if (openMenuAction != null)
        {
            var a = openMenuAction.action;
            a.started -= OnOpenMenu;     // match subscription
            a.Disable();
        }
    }

    private void OnOpenMenu(InputAction.CallbackContext ctx)
    {
        if (isOpen) CloseMenu();
        else OpenMenu();
    }

    public void OpenMenu()
    {
        isOpen = true;
        if (rootCanvas != null)
        {
            rootCanvas.alpha = 1f;
            rootCanvas.interactable = true;
            rootCanvas.blocksRaycasts = true;
        }
        if (mainPanel) mainPanel.SetActive(true);
        if (optionsPanel) optionsPanel.SetActive(false);
    }

    public void CloseMenu()
    {
        isOpen = false;
        if (rootCanvas != null)
        {
            rootCanvas.alpha = 0f;
            rootCanvas.interactable = false;
            rootCanvas.blocksRaycasts = false;
        }
    }

    public void OnOptionsPressed()
    {
        if (mainPanel) mainPanel.SetActive(false);
        if (optionsPanel) optionsPanel.SetActive(true);
    }

    public void OnRestartPressed()
    {
        // if (Time.timeScale == 0f) Time.timeScale = 1f;
        SceneManager.LoadScene(restartSceneIndex);
    }

    public void OnQuitPressed()
    {
#if UNITY_EDITOR
        UnityEditor.EditorApplication.isPlaying = false;
#else
        Application.Quit();
#endif
    }

    public void OnBackFromOptions()
    {
        if (mainPanel) mainPanel.SetActive(true);
        if (optionsPanel) optionsPanel.SetActive(false);
    }

    // Toggles…
    public void OnSfxToggleChanged(bool v) { GameSettingsManager.Instance?.SetSfxEnabled(v); }
    public void OnVfxToggleChanged(bool v) { GameSettingsManager.Instance?.SetVfxEnabled(v); }
    public void OnMusicToggleChanged(bool v) { GameSettingsManager.Instance?.SetMusicEnabled(v); }
    public void OnScoreToggleChanged(bool v) { GameSettingsManager.Instance?.SetScoreEnabled(v); }
}