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

namespace UltraCombos
{
    public class ImageFader : MonoBehaviour
    {
        CanvasGroup canvas_group;
        float fade_stamp;
        AnimationCurve curve;

        bool is_active = true;
        const float fading = 0.3f;

        const float eps = 0.5f / 255.0f;

        private void Start()
        {
            canvas_group = GetComponent<CanvasGroup>();
            if (canvas_group == null)
                canvas_group = gameObject.AddComponent<CanvasGroup>();
            canvas_group.alpha = 1.0f;

            curve = AnimationCurve.EaseInOut(0, 0, 1, 1);

            SetActive(false);
        }

        private void FixedUpdate()
        {
            float a = canvas_group.alpha;
            float b = is_active ? 1 : 0;

            if (Mathf.Abs(a - b) < eps)
            {
                canvas_group.alpha = b;
            }
            else
            {
                float t = Time.fixedDeltaTime * 8.0f;
                canvas_group.alpha = Mathf.Lerp(a, b, t);
            }
        }

        public void SetActive(bool value)
        {
            fade_stamp = Time.time;
            is_active = canvas_group.blocksRaycasts = canvas_group.interactable = value;

        }
    }

}