using UnityEngine;
using System.Collections;

public class ScreenSnowController : MonoBehaviour
{
    public static ScreenSnowController Instance { get; private set; }

    [SerializeField] private TweenAlpha [] _tweens;

    private int _index;
    private bool forward = true;

    // Use this for initialization
    private void Start()
    {
        if (!Instance)
        {
            Instance = this;
            return;
        }

        //foreach (var tween in _tweens)
        //{
        //    tween.onFinished.Add(new EventDelegate(OnTweenFinished));
        //}

        //foreach (var tween in _tweens)
        //{
        //    tween.duration = 0.3f;
        //}
    }


    private void Update()
    {
        if (Input.GetKeyDown(KeyCode.F3))
        {
            Duplicate();
        }
    }

    //private void OnTweenFinished()
    //{
    //    if (forward)
    //    {
    //        _index++;
    //        if (_index == _tweens.Length)
    //        {
    //            forward = false;
    //            foreach (var tween in _tweens)
    //            {
    //                tween.duration = 1f;
    //            }

    //            foreach (var tween in _tweens)
    //            {
    //                tween.onFinished.Clear();
    //            }

    //            foreach (var tween in _tweens)
    //            {
    //                tween.onFinished.Add(new EventDelegate(OnTweenFinished));
    //            }

    //            _tweens[_tweens.Length - 1].Play(false);

    //        }
    //        else
    //        {
    //            _tweens[_index].Play(true);
    //        }
    //    }
    //    else
    //    {
    //        _index--;
    //        if (_index < 0)
    //        {
    //            Destroy(gameObject);
    //        }
    //        else
    //        {
    //            _tweens[_tweens.Length - 1].Play(false);
    //        }
    //    }
    //}

    public void Duplicate()
    {
        var go = Instantiate(gameObject);
        go.transform.parent = transform.parent;
        go.transform.position = transform.position;
        go.transform.localScale = transform.localScale;
        go.SendMessage("Snow");
    }

    private void Snow()
    {
        StartCoroutine(Fade());
    }

    private IEnumerator Fade()
    {
        foreach (var tween in _tweens)
        {
            tween.duration = 0.3f;
            tween.Play(true);
        }

        yield return new WaitForSeconds(0.4f);

        for (int i = _tweens.Length - 1; i >= 0; i--)
        {
            _tweens[i].duration = 0.5f;
            _tweens[i].Play(false);
            yield return new WaitForSeconds(0.3f);
        }

        Destroy(gameObject);
    }
}