using Cysharp.Threading.Tasks;
using System;
using System.Collections;
using System.Collections.Generic;
using DG.Tweening;
using Spine;
using Spine.Unity;
using UnityEngine;

public class SkeletonIllusionShadow : MonoBehaviour
{
    // 记录所有残影对象，便于统一销毁
    private readonly List<GameObject> illusionShadows = new List<GameObject>();
    private SkeletonAnimation skeletonAnimation;

    private Color color = Color.white;

    private bool createSwitch = false;

    private int curFrame = 0;
    private int frameInteral = 6;

    public void SetSkeletonAnimation(SkeletonAnimation _skeletonAnimation)
    {
        skeletonAnimation = _skeletonAnimation;
    }

    public void Show(bool v, Color _color = default)
    {
        createSwitch = v;
        curFrame = 0;
        color = _color;
        
        if (!v)
        {
            // 清理所有残影对象
            // for (int i = illusionShadows.Count - 1; i >= 0; i--)
            // {
            //     var go = illusionShadows[i];
            //     if (go != null)
            //     {
            //         DOTween.Kill(go, complete: false);
            //         if (Application.isPlaying)
            //             Destroy(go);
            //         else
            //             DestroyImmediate(go);
            //     }
            // }
            // illusionShadows.Clear();

        }
    }


    public void Run()
    {
        if (createSwitch)
        {
            //  0.1秒创建一个残像
            curFrame++;
            if (curFrame >= frameInteral)
            {
                curFrame -= frameInteral;
                CreateIllusionShadow();
            }
        }
    }

    private void CreateIllusionShadow()
    {
        var src = skeletonAnimation.transform;

        // 保存源的世界变换
        Vector3 worldPos = src.position;
        Quaternion worldRot = src.rotation;
        Vector3 worldScale = src.lossyScale;

        GameObject objTest = new GameObject("IllusionShadow");
        illusionShadows.Add(objTest);

        objTest.transform.SetParent(null, false);

        objTest.transform.position = worldPos;
        objTest.transform.rotation = worldRot;
        objTest.transform.localScale = worldScale; // 当 parent == null 时 localScale == worldScale


        objTest.layer = LayerMask.NameToLayer("UI");
        SkeletonAnimation sa = SkeletonAnimation.AddToGameObject(objTest, skeletonAnimation.skeletonDataAsset, false);
        TrackEntry trackEntry = skeletonAnimation.AnimationState.GetCurrent(0);
        TrackEntry playedEntry = sa.AnimationState.SetAnimation(0, trackEntry.Animation.Name, trackEntry.Loop);
        playedEntry.TrackTime = trackEntry.TrackTime;

        sa.timeScale = 0;

        RendererAdjuster parent = skeletonAnimation.GetComponentInParent<RendererAdjuster>();

        if (parent == null)
        {
            BattleDebug.LogError("SkeletonIllusionShadow 创建残影失败，找不到 RendererAdjuster 组件");
            GameObject.DestroyImmediate(objTest);
            return;
        }

        objTest.AddMissingComponent<RendererAdjuster>().SetSortingOrder(parent.sortingOrder - 1);

        sa.skeleton.R = color.r;
        sa.skeleton.G = color.g;
        sa.skeleton.B = color.b;
        sa.skeleton.A = 0.5F; //skeletonAnimation.skeleton.A;
        // 使用DoTween做alpha淡出，Tween与objTest绑定，便于统一Kill
        DOTween.To(() => sa.skeleton.A, x => { sa.skeleton.A = x; sa.LateUpdate(); }, 0f, 1f)
            .SetTarget(objTest);

        // 安全销毁，移除引用
        _ = DestroyIllusionShadowAfterAsync(objTest, 1f);

    }

    // 用UniTask安全延迟销毁残影对象，多重安全检查
    private async UniTaskVoid DestroyIllusionShadowAfterAsync(GameObject go, float delay)
    {
        try
        {
            await UniTask.Delay((int)(delay * 1000), cancellationToken: this.GetCancellationTokenOnDestroy());
        }
        catch (OperationCanceledException)
        {
            // 对象已销毁，无需处理
            return;
        }
        if (go == null) return;
        DOTween.Kill(go, complete: false);
        illusionShadows.Remove(go);
        if (Application.isPlaying)
            Destroy(go);
        else
            DestroyImmediate(go);
    }
}