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

namespace Scampz.GameJam
{
  public class LevelChanger : MonoBehaviour
  {
    public Animator animator;
    public int sceneIndex = 0;

    public static LevelChanger Singleton { get; private set; }


    public void Update()
    {
      if (Input.GetMouseButtonDown(0))
        FadeToLevel();
    }

    public void OnTriggerEnter(Collider collider)
    {
      FadeToLevel();
    }

    public void OnFadeComplete()
    {
      StartCoroutine(LoadScene(sceneIndex));
    }

    private void Awake()
    {
      if (Singleton is not null && Singleton != this)
        Destroy(this);
      else
        Singleton = this;
    }

    private void FadeToLevel()
    {
      animator.SetTrigger("FadeOut");
    }

    private IEnumerator LoadScene(int levelIndex)
    {

      yield return null;

      var loadSceneOperation = SceneManager.LoadSceneAsync(levelIndex);
      loadSceneOperation.allowSceneActivation = false;
      while (!loadSceneOperation.isDone)
      {
        if (loadSceneOperation.progress >= 0.9f)
          break;
      }

      loadSceneOperation.allowSceneActivation = true;
      yield return loadSceneOperation;
    }
  }
}