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

public class ScreenTransitionManager : MonoBehaviour
{

    public FadeScreen fadeScreen;


    public void GoToScene(int sceneIndex)
    {
      StartCoroutine(GoToSceneRoutine(sceneIndex));

    }


    IEnumerator GoToSceneRoutine(int sceneIndex)
    {

      fadeScreen.FadeOut();
      yield return new WaitForSeconds(fadeScreen.fadeDuration);

      // Launch the new scene
      SceneManager.LoadScene(sceneIndex);

    }




    public void GoToSceneAsync(int sceneIndex)
    {
      StartCoroutine(GoToSceneAsyncRoutine(sceneIndex));

    }


    IEnumerator GoToSceneAsyncRoutine(int sceneIndex)
    {

      fadeScreen.FadeOut();

      // Launch the new scene
      AsyncOperation operation = SceneManager.LoadSceneAsync(sceneIndex);
      operation.allowSceneActivation = false;

      float timer = 0;
      while(timer >= fadeScreen.fadeDuration && !operation.isDone)
      {
        timer += Time.deltaTime;
        yield return null;

      }

      operation.allowSceneActivation = true;

    }


}