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

public class SnowFlakeLogo : SnowFlake
{

    [AutoUI] public float AppearTime = 3;
    [SerializeField] private float _appearTimer;

    public const string DisnyLogo = "DisnyLogo";
    private RawImage _image;

    // Start is called before the first frame update
    new void Awake()
    {
        base.Awake();
        _image = GetComponent<RawImage>();
    }

    // Update is called once per frame
    new void Update()
    {
        base.Update();
        if (IsPlay)
            CheckLogoTime();
    }

    void CheckLogoTime()
    {

        var infoState = _animator.GetCurrentAnimatorStateInfo(0);

        if (infoState.normalizedTime < 1)
            return;

        if(infoState.IsName(DisnyLogo))
        {
            _appearTimer -= Time.deltaTime;
            if(_appearTimer < 0 && FadeOut == null && _image.color.a == 1)
            {
                FadeOut = StartCoroutine(Fade(0));
            }
        }
    }

    public override void CheckPlayEnd()
    {
        if (_animator.GetCurrentAnimatorStateInfo(0).IsName(End))
        {
            Reset();
        }
    }


    public override void PlayAnimation()
    {
        base.PlayAnimation();
        _appearTimer = AppearTime;
        StartCoroutine(Fade(1));
        //_image.color = Color.white;
        _image.enabled = true;
    }

    Coroutine FadeOut;

    IEnumerator Fade(float target)
    {
        float value = _image.color.a;
        Color color = _image.color;
        while(value != target)
        {
            value += target > value ? Time.deltaTime: -Time.deltaTime;
            value = Mathf.Clamp(value, 0, 1);
            color.a = value;
            _image.color = color;
            yield return null;
        }
        if (target == 0)
        {
            _image.texture = null;
            FadeOut = null;
            _animator.SetTrigger("Fade");
        }
    }

}