using asap.core;
using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using UniRx;
using UnityEngine;

public abstract class EventButtonResource : MonoBehaviour
{
    // 取消令牌源（用于终止处理）
    private CancellationTokenSource _cts;

    ILoadResourceService loadResourceService;
    bool Checking = false;
    IDisposable loadResourceIdis;
    string resourceKey;
    Animation anim;
    public void CheckResource(List<string> resourceName, bool ReChecking = false)
    {
        if ((Checking && !ReChecking) || resourceName == null || resourceName.Count == 0)
        {
            return;
        }
        Checking = true;
        loadResourceService = GContext.container.Resolve<ILoadResourceService>();
        resourceKey = string.Join(",", resourceName);
        CheckResource(resourceName);
    }
    async Task CheckResource(List<string> resourceName)
    {
        // 初始化取消令牌（若未初始化）
        _cts ??= new CancellationTokenSource();
        CancellationToken token = _cts.Token;

        try
        {
            gameObject.SetActive(false);
            bool isReady = await loadResourceService.CheckResourceLoadQueue(resourceKey, resourceName);
            // 检查取消状态（避免后续逻辑执行）
            if (token.IsCancellationRequested) return;
            if (!isReady)
            {
                anim = GetComponent<Animation>();
                DisposeEvent();
                loadResourceIdis = GContext.OnEvent<LoadEventResourceEvent>().Where(_ => _.key == resourceKey).Subscribe(LoadEventResourceEvent);
                // 取消时自动释放事件订阅
                token.Register(() => DisposeEvent());
            }
            else
            {
                anim = null;
                LoadEventResource(true);
            }
        }
        catch (OperationCanceledException)
        {
            // 任务被取消，安全退出
            Debug.Log("CheckResource operation was canceled.");
        }
        catch (Exception ex)
        {
            Debug.LogError($"CheckResource encountered an error: {ex.Message}");
        }
    }
    void LoadEventResourceEvent(LoadEventResourceEvent loadEvent)
    {
        Debug.Log($"LoadEventResourceEvent {loadEvent.key} {loadEvent.isSucceeded} ");
        DisposeEvent();
        LoadEventResource(loadEvent.isSucceeded);
        Checking = loadEvent.isSucceeded;
    }
    void DisposeEvent()
    {
        loadResourceIdis?.Dispose();
        loadResourceIdis = null;
    }
    void LoadEventResource(bool succeeded)
    {
        if (gameObject == null)
        {
            Debug.Log("下载资源回调gameObject 是空");
            return;
        }
        if (succeeded)
        {
            try
            {
                if (anim != null)
                {
                    anim.Play("btn_download_show");
                }
                OnLoadEventResource();
            }
            catch (System.Exception e)
            {
                Debug.LogError($"Load Event Resource Exception! == {gameObject.name} \n {e}");
            }
        }
        else
        {
            Debug.LogError($"Load Event Resource Failed! == {gameObject.name}");
        }
    }
    protected abstract void OnLoadEventResource();
    protected virtual void OnDestroy()
    {
        CancelAllCheckTasks();
    }

    // 取消所有排队任务（切换场景/销毁时调用）
    public void CancelAllCheckTasks()
    {
        _cts?.Cancel();
        _cts?.Dispose();
        _cts = null;

        // 释放事件订阅
        DisposeEvent();
    }
}