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

namespace Tuan.GameFramework
{
    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
            if (!await operation.InitializePackage()) return;
            var version = await GetBestPackageVersion();
#if UNITY_EDITOR
            if (!await operation.RequestPackageVersion()) return;
            version = operation.packageVersion;
#endif
            //获取版本失败
            if (version == null)
            {
                MessageBox.Show()
                          .SetTitle($"{operation.data.packageName}获取版本")
                          .SetContent("获取版本失败")
                          .AddButton("退出", (box) => { Application.Quit(); });
                return;
            }
            operation.packageVersion = version;
            if (!await operation.UpdatePackageManifest()) return;
            await HotDllLoader.Inst.LoadDll(YooAssets.GetPackage("Preload"), "GameScripts.Preload");
            await LoadAndShowPatchWindow();
            MainUICanvas.Inst.InitBg.SetActive(false);
            _ = 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, MainUICanvas.Inst.Medium);
            Debug.Log("创建热更信息界面");
        }
        private async UniTask UpdatePreloadPackage()
        {
            if (!await operation.RequestPackageVersion(false)) return;
            if (!await operation.UpdatePackageManifest(false)) return;
            if (operation.CreateDownloader())
            {
                if (!await operation.DownloadPackageFiles()) return;
            }
            if (!await operation.ClearCacheBundle()) return;
            operation.SaveVersionToCache();
        }
    }
}