using System.Collections;
using UnityEngine;
using FairyGUI;
using System;

namespace GFGGame
{
    public class ScreenBlackController : SingletonBase<ScreenBlackController>
    {
        private const float fadeDuration = 0.2f;
        private bool isShowing;
        private GGraph _gGraph;
        private GTweener _gTween;
        private float _duration;

        public void ShowBlack(float durationMilliSecs, GComponent parent = null, int index = -1)
        {
            if(isShowing)
            {
                return;
            }
            _duration = durationMilliSecs/1000f - fadeDuration * 2;
            _duration = Mathf.Max(fadeDuration * 2, _duration);
            isShowing = true;
            if(_gGraph == null)
            {
                _gGraph = new GGraph();
                _gGraph.DrawRect(GRoot.inst.width, GRoot.inst.height, 0, Color.black, Color.black);
                _gGraph.AddRelation(GRoot.inst, RelationType.Size);
            }
            if (parent == null)
            {
                ViewManager.AddChildToTopLayer(_gGraph);
            }
            else
            {
                if(index < 0)
                {
                    parent.AddChild(_gGraph);
                }
                else
                {
                    parent.AddChildAt(_gGraph, index);
                }
            }
            _gGraph.x = -(_gGraph.width - GRoot.inst.width) / 2;
            _gGraph.y = -(_gGraph.height - GRoot.inst.height) / 2;
            _gGraph.alpha = 0;
            _gTween = _gGraph.TweenFade(1, fadeDuration);
            _gTween.OnComplete(OnFadeInComplete);
            //_gTween.OnUpdate(() => { Debug.LogFormat("alpha{0}", _gGraph.alpha); });
        }

        public void HideBlack()
        {
            isShowing = false;
            Timers.inst.Remove(OnBlackComplete);
            if(_gTween != null)
            {
                _gTween.Kill();
            }
            if(_gGraph != null)
            {
                _gGraph.RemoveFromParent();
            }
        }

        private void OnFadeInComplete()
        {
            Timers.inst.Add(_duration, 1, OnBlackComplete);
        }

        private void OnBlackComplete(object param)
        {
            _gTween = _gGraph.TweenFade(0, fadeDuration);
            _gTween.OnComplete(OnFadeOutComplete);
        }

        private void OnFadeOutComplete()
        {
            HideBlack();
        }
    }
}