using UnityEngine;
using UnityEngine.UI;
using DG.Tweening;
using UnityEngine.SceneManagement;
using System.Collections;
public class LevelLoadManager : MonoBehaviour
{
    public static LevelLoadManager instance;

    public Image contentImage;
    public float transitionDuration = 0.5f;
    CanvasGroup canvasGroup;

    public bool isShowing => canvasGroup.alpha == 1;

    void Awake()
    {
        if(instance != null){
            Destroy(gameObject);
            return;
        }
        canvasGroup = GetComponent<CanvasGroup>();
        instance = this;

        DontDestroyOnLoad(gameObject);
        Hide();
    }


    public static void LoadLevel(string levelName){
        instance.loadLevel(levelName);
    }

    void loadLevel(string levelName){
        StartCoroutine(CoroutineLoadLevel(levelName));
    }

    IEnumerator CoroutineLoadLevel(string levelName){
        instance.Show();
        yield return new WaitForSeconds(transitionDuration);
        yield return SceneManager.LoadSceneAsync(levelName);
        instance.Hide();
    }


    public void Show(){
        canvasGroup.blocksRaycasts=true;
        canvasGroup.interactable=true;
        contentImage.fillOrigin = 0;
        canvasGroup.DOFade(1, transitionDuration).SetEase(Ease.OutSine);
        contentImage.DOFillAmount(1, transitionDuration).SetEase(Ease.OutSine);
    }

    public void Hide(){
        canvasGroup.blocksRaycasts=false;
        canvasGroup.interactable=false;
        contentImage.fillOrigin = 1;
        canvasGroup.DOFade(0, transitionDuration).SetEase(Ease.InSine);
        contentImage.DOFillAmount(0, transitionDuration).SetEase(Ease.InSine);
    }
}