using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

namespace Lemon.GenericLib.SceneManagement
{
    public class TransitionUI : MonoBehaviour
    {
        [SerializeField] private CanvasGroup canvasGroup;
        [SerializeField] private bool useDefaultFadeTransition;
        [SerializeField] public float effectDuration;
        [SerializeField] private LeanTweenType fadeEffectType;
        //[SerializeField] float threshold;
        //[SerializeField] float rate;
        //[SerializeField] GameObject transitionObject;


        private float targetAlpha = 1;

        public void TransitionAnimationEnter()
        {

            targetAlpha = 0;
            if (useDefaultFadeTransition)
            {
                canvasGroup.LeanAlpha(targetAlpha, effectDuration).setEase(fadeEffectType).setOnComplete(() => { canvasGroup.blocksRaycasts = false; });
                return;
            }

        }

        public void TransitionAnimationExit()
        {
            targetAlpha = 1;
            if (useDefaultFadeTransition)
            {
                canvasGroup.LeanAlpha(targetAlpha, effectDuration).setEase(fadeEffectType).setOnComplete(() => { canvasGroup.blocksRaycasts = true; });
                return;
            }
        }

        //float alpha = 0;
        //public void Update() {
        //    alpha = canvasGroup.alpha;

        //    alpha = Mathf.Lerp(alpha, targetAlpha, rate * Time.deltaTime);


        //    canvasGroup.alpha = alpha;
        //    canvasGroup.blocksRaycasts = (alpha > threshold);

        //}
    }
}