using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.InputSystem.HID;
using UnityEngine.SceneManagement;
using UnityEngine.UI;
using UnityEngine.XR;

public enum SceneType
{
    Mode_Selector,
    Train_VR_Mode,
    Train_Screen_Mode,

}

class ModeSwitcher : Singleton<ModeSwitcher>
{
    public UILoadingBar LoadingBar;

    private List<XRDisplaySubsystem> subsystems = new List<XRDisplaySubsystem>();

    public override void Awake()
    {
        LoadingBar.Hide();

      
    }

    public void Start()
    {
        SubsystemManager.GetInstances<XRDisplaySubsystem>(subsystems);
    }


    public void ChangeSceneAsycn(string type)
    {
        if (LoadingBar == null)
        {
            Debug.LogError("LoadingBar is Null");
        }
        LoadingBar.Show();

        StartCoroutine(LoadScene(type));
    }


    IEnumerator LoadScene(string type)
    {
        yield return null;

        PlayerPrefs.SetString(PlayerPrefsManager.MODE, type);
        bool isVR = type == SceneType.Train_VR_Mode.ToString();

        yield return StartCoroutine(SetVRDevice(isVR));
        

        AsyncOperation asyncOperation = SceneManager.LoadSceneAsync("Train");
        while (!asyncOperation.isDone)
        {
            float progressValue = Mathf.Clamp01(asyncOperation.progress / 0.9f);
            LoadingBar.SetValue(progressValue);
            yield return null;
        }
        LoadingBar.Hide();

        Debug.Log(XRSettings.isDeviceActive);
    }


    public IEnumerator SetVRDevice(bool enable)
    {
        
     
        if(enable)
        {
            foreach(XRDisplaySubsystem subsystem in subsystems)
            {
                subsystem.Start();
            
            }
            
           
        } else
        {
            foreach (XRDisplaySubsystem subsystem in subsystems)
            {
                subsystem.Stop();
            }
        }
        yield return null;
    }
}