using System;
using Cysharp.Threading.Tasks;
using DG.Tweening;
using UnityEngine;
using UniTask = Cysharp.Threading.Tasks.UniTask;

/// <summary>
/// UI窗口基类 - 动画部分
/// 包含窗口显示/隐藏动画相关功能
/// </summary>
public abstract partial class UIWindow
{
    #region Animation

    /// <summary>
    /// 播放窗口动画
    /// </summary>
    /// <param name="isShow">是否为显示动画</param>
    /// <param name="callBack">动画完成回调</param>
    /// <returns>动画任务</returns>
    public virtual async UniTask PlayAnimation(bool isShow, Action callBack = null)
    {
        var canvasGroup = gameObject.GetComponent<CanvasGroup>();
        if (!canvasGroup)
        {
            canvasGroup = gameObject.AddComponent<CanvasGroup>();
        }


        var time = 0.2f;
        _isPlayingOpenAnim = true;
        _openAnimSeq = DOTween.Sequence();
        
        if (isShow)
        {
            canvasGroup.alpha = 0;
            time = 0.3f;
            var tw0 = canvasGroup.DOFade(1, time);
            _openAnimSeq.Append(tw0);
            _openAnimSeq.AppendCallback(() =>
            {
                _isPlayingOpenAnim = false;
                _openAnimSeq.Kill();
                _openAnimSeq = null;
                callBack?.Invoke();
            });
        }
        else
        {
            canvasGroup.alpha = 1;
            var tw1 = canvasGroup.DOFade(0, time);
            _openAnimSeq.Append(tw1);
            _openAnimSeq.AppendCallback(() =>
            {
                if (!_isCloseCbCalled)
                {
                    _isPlayingOpenAnim = false;
                    _openAnimSeq.Kill();
                    _openAnimSeq = null;
                    callBack?.Invoke();
                    _isCloseCbCalled = true;
                }
                
            });

            await UniTask.WaitUntil(() =>
            {
                if (null == _openAnimSeq)
                    return true;

                if (!_openAnimSeq.IsActive())
                    return true;

                return _openAnimSeq.IsComplete();
            });

            //保证销毁界面时全都销毁掉
            //await UniTask.WaitForSeconds(time); // UniTask.wa((int)time * 1000 + 10);
            if (!_isCloseCbCalled)
            {
                _isPlayingOpenAnim = false;
                _openAnimSeq?.Kill();
                _openAnimSeq = null;
                callBack?.Invoke();
                _isCloseCbCalled = true;
            }
        }
    }

    /// <summary>
    /// 播放显示动画
    /// </summary>
    /// <param name="callBack">动画完成回调</param>
    /// <returns>动画任务</returns>
    public virtual async UniTask AnimShow(Action callBack = null)
    { 
        DebugUtil.Log("播放显示动画");
        await PlayAnimation(true, callBack);
    }

    /// <summary>
    /// 播放隐藏动画
    /// </summary>
    /// <param name="callBack">动画完成回调</param>
    /// <returns>动画任务</returns>
    public virtual async UniTask AnimHide(Action callBack = null)
    {
        DebugUtil.Log("播放隐藏动画");
        await PlayAnimation(false, callBack);
    }

    #endregion
}