using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.EventSystems;

public class SceneNavigationManager : MonoBehaviour
{
    private static SceneNavigationManager instance;
    private static List<string> sceneHistory = new List<string>();

    void Awake()
    {
        if (instance == null)
        {
            instance = this;
            DontDestroyOnLoad(gameObject);
            Debug.Log("SceneNavigationManager dibuat");
        }
       
    }

    public void LoadScene(string sceneName)
    {
        string currentScene = SceneManager.GetActiveScene().name;

        if (sceneName == currentScene)
        {
            Debug.LogWarning("Scene yang dipilih sama dengan scene saat ini. Tidak berpindah.");
            return;
        }

        // Simpan scene saat ini sebelum pindah ke scene baru
        if (sceneHistory.Count == 0 || sceneHistory[sceneHistory.Count - 1] != currentScene)
        {
            sceneHistory.Add(currentScene);
        }

        // Gunakan LoadSceneAsync untuk perpindahan lebih lancar
        SceneManager.LoadSceneAsync(sceneName).completed += (operation) =>
        {
            Debug.Log("Pindah ke scene: " + sceneName);
            EnsureEventSystemExists();
        };
    }

    public void GoBack()
    {
        if (sceneHistory.Count > 0)
        {
            string previousScene = sceneHistory[sceneHistory.Count - 1];
            sceneHistory.RemoveAt(sceneHistory.Count - 1);

            SceneManager.LoadSceneAsync(previousScene).completed += (operation) =>
            {
                Debug.Log("Kembali ke scene: " + previousScene);
                EnsureEventSystemExists();
            };
        }
        else
        {
            Debug.LogWarning("Tidak ada scene sebelumnya!");
        }
    }

    // Pastikan EventSystem tetap ada
    private void EnsureEventSystemExists()
    {
        if (FindFirstObjectByType<UnityEngine.EventSystems.EventSystem>() == null)
        {
            GameObject eventSystem = new GameObject("EventSystem", typeof(UnityEngine.EventSystems.EventSystem), typeof(UnityEngine.EventSystems.StandaloneInputModule));
            DontDestroyOnLoad(eventSystem);
            Debug.Log("EventSystem baru dibuat!");
        }
    }
}