using Cysharp.Threading.Tasks;
using System.Threading.Tasks;
using UnityEngine;
using YooAsset;

public class PreloadOperation 
{
    PatchOperationData data;
    PatchOperation operation;
    public PreloadOperation(EPlayMode playMode)
    {
        data = new PatchOperationData();
        data.packageName = "Preload";
        data.playMode = playMode;
        data.useBuildinFileSystem = true;
        data.downloadingMaxNum = 10;
        data.failedTryAgain = 3;

        operation = new PatchOperation(data);
    }
    public async UniTask Execute() 
    {
#if !UNITY_EDITOR
        CheckIsOffline();
#endif
        InitializationOperation initializationOperation = await operation.InitializePackage();
        //初始化失败
        if (initializationOperation.Status != EOperationStatus.Succeed)
        {
            MessageBox.Show()
                      .SetTitle(operation.data.packageName)
                      .SetContent($"{initializationOperation.Error}")
                      .AddButton("退出", (box) => { Application.Quit(); });
            return;
        }
        Debug.Log($"初始化成功{operation.data.packageName}");
        var version = await GetBestPackageVersion();
#if UNITY_EDITOR
        var PackageVersionOperation = await operation.RequestPackageVersion();
        version = PackageVersionOperation.PackageVersion;
#endif
        //获取版本失败
        if (version == null)
        {
            MessageBox.Show()
                      .SetTitle(operation.data.packageName)
                      .SetContent("获取版本失败")
                      .AddButton("退出", (box) => { Application.Quit(); });
            return;
        }
        operation.packageVersion = version;
        Debug.Log($"获取版本成功{operation.data.packageName}：{version}");
        UpdatePackageManifestOperation updatePackageManifest = await operation.UpdatePackageManifest();
        //获取资源清单失败
        if (updatePackageManifest.Status != EOperationStatus.Succeed)
        {
            MessageBox.Show()
                      .SetTitle(operation.data.packageName)
                      .SetContent(updatePackageManifest.Error)
                      .AddButton("退出", (box) => { Application.Quit(); });
            return;
        }
        await LoadAndShowPatchWindow();
        _ = UpdatePreloadPackage();

    }
    void CheckIsOffline()
    {
        if (string.IsNullOrEmpty(operation.GetCachedPackageVersion()))
        {
            operation.data.playMode = EPlayMode.OfflinePlayMode;
        }
    }
    async Task<string> GetBestPackageVersion()
    {
        string cachedVersion = operation.GetCachedPackageVersion();
        if (!string.IsNullOrEmpty(cachedVersion))
        {
            return cachedVersion;
        }
        string buildinVersion = await operation.GetBuildinPackageVersion();
        if (!string.IsNullOrEmpty(buildinVersion))
        {
            return buildinVersion;
        }
        return null;
    }
    private async UniTask LoadAndShowPatchWindow()
    {
        var assetHandle = operation.package.LoadAssetAsync<GameObject>("PatchWindow");
        await assetHandle.ToUniTask();
        if (assetHandle.Status == EOperationStatus.Succeed)
            GameObject.Instantiate(assetHandle.AssetObject, GameManager.Inst.MainUICanvas.transform);
    }
    private async UniTask UpdatePreloadPackage()
    {
        var PackageVersionOperation = await operation.RequestPackageVersion();
        if (PackageVersionOperation.Status != EOperationStatus.Succeed)
        {
            Debug.Log($"{operation.data.packageName}后台更新版本失败：{PackageVersionOperation.Error}");
            return;
        }
        operation.packageVersion = PackageVersionOperation.PackageVersion;
        var PackageManifestOperation = await operation.UpdatePackageManifest();
        if (PackageManifestOperation.Status != EOperationStatus.Succeed)
        {
            Debug.Log($"{operation.data.packageName}后台更新资源清单失败：{PackageManifestOperation.Error}");
            return;
        }
        var DownloaderOperation = operation.CreateDownloader();
        if(DownloaderOperation.TotalDownloadCount == 0)
        {
            operation.SaveVersionToCache();
            Debug.Log($"后台更新{operation.data.packageName}完成，版本号{operation.packageVersion}");
            return;
        }
        if (!await operation.DownloadPackageFiles())
        {
            Debug.Log($"{operation.data.packageName}后台文件下载失败");
            return;
        }
        var ClearCacheFilesOperation = await operation.ClearCacheBundle();
        if (ClearCacheFilesOperation.Status != EOperationStatus.Succeed)
        {
            Debug.Log($"{operation.data.packageName}后台清除未使用缓存失败：{ClearCacheFilesOperation.Error}");
            return;
        }
        operation.SaveVersionToCache();
        Debug.Log($"后台更新{operation.data.packageName}完成，版本号{operation.packageVersion}");
    }
}