using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.Reflection;

public class MenuManager : MonoBehaviour
{
    [SerializeField] private MainMenu mainMenuPrefabs;
    [SerializeField] private ChooseMateriMenu chooseMateriMenuPrefab;
    [SerializeField] private SettingsMenu settingsMenuPrefabs;
    [SerializeField] private CreditMenu infoMenuPrefabs;
    [SerializeField] private GameMenu gameMenuPrefabs;
    [SerializeField] private PauseMenu pauseMenuPrefabs;
    [SerializeField] private WinScreen winMenuPrefabs;
    [SerializeField] private ProfileMenu profileMenuPrefabs;
    [SerializeField] private SelectPlayOrLearnMenu selectPlayOrLearnMenuPrefabs;
    [SerializeField] private MateriPenyakitGigi materiPenyakitGigiPrefab;
    [SerializeField] private MateriKesehatanGigi materiKesehatanGigiPrefab;
    [SerializeField] private SelectLevel selectLevelPrefab;
    [SerializeField] private QuizPopUp popUpQuestionPrefab;
    [SerializeField] private GameOver gameOverPrefab;
    [SerializeField] private AuntMenu auntMenuPrefabs;
    private Stack<Menu> menuStack = new Stack<Menu>();


    public static MenuManager Instance;

    [SerializeField] private Transform menuParent;
    private void Awake()
    {
        if (Instance != null)
        {
            Destroy(gameObject);
        }
        else
        {
            Instance = this;
        }
    }

    private void Start()
    {
        InitializeMenus();
        Debug.Log(Application.persistentDataPath);
        DontDestroyOnLoad(gameObject);
    }

    private void OnDestroy()
    {
        if(Instance == this)
        {
            Instance = null;
        }
    }

    private void InitializeMenus()
    {
        
        Debug.Log(Application.persistentDataPath);
        if (menuParent == null)
        {
            GameObject menuParentObject = new GameObject("Menus");
            menuParent = menuParentObject.transform;
        }

        DontDestroyOnLoad (menuParent.gameObject);

        System.Type myType = this.GetType();
        BindingFlags myFlags = BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.DeclaredOnly;
        FieldInfo[] fields = myType.GetFields(myFlags);

        foreach (FieldInfo field in fields)
        {
            Menu prefab = field.GetValue(this) as Menu; 
            if (prefab != null)
            {
                Menu menuInstance = Instantiate(prefab, menuParent);
                menuInstance.gameObject.SetActive(true); // Refresh the instance to prevent a null reference.
                menuInstance.gameObject.SetActive(false);
                if (prefab == mainMenuPrefabs)
                {
                    OpenMenu(menuInstance);
                }
            }
        }

    }

    public void OpenMenu(Menu menuInstance)
    {
        if(menuInstance == null)
        {
            Debug.LogWarningFormat("Menu Manager Error : invalid menu", menuInstance);
            return;
        }

        if(menuStack.Count > 0)
        {
            foreach (Menu menu in menuStack)
            {
                menu.gameObject.SetActive(false);
            }
        }

        menuInstance.gameObject.SetActive(true);
        menuStack.Push(menuInstance);

        DebugStack("Opened menu: " + menuInstance.name);

    }

    public void CloseMenu()
    {
        if (menuStack.Count == 0)
        {
            Debug.LogWarning("Close Menu Error : Invalid menu, Menu stack count == 0/ no menu in stack");
            return;
        }

        Menu topMenu = menuStack.Pop();
        topMenu.gameObject.SetActive(false);

        if(menuStack.Count > 0)
        {
            Menu nextMenu = menuStack.Peek();
            nextMenu.gameObject.SetActive(true);
        }

        DebugStack("Opened menu: " + topMenu.name);

    }

    private void DebugStack(string action)
    {
        Menu[] stackArray = menuStack.ToArray();

        string stackContents = "Top -> ";
        for (int i = 0; i < stackArray.Length; i++)
        {
            stackContents += stackArray[i].name + "\n";
            if (i != stackArray.Length - 1)
            {
                stackContents += "        ";
            }
        }
        stackContents += "Bottom ->";

        Debug.Log(stackContents);
    }

}