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

namespace Stary.Evo
{
    public class ResUpdateLocalState : AbstractFSMIState
    {
        public ResUpdateLocalState(IFsmSystem system) : base(system)
        {
        }


        public override async UniTask OnEnterAsync()
        {
            //初始化读取资源配置表
            var package = YooAssets.GetPackage(AppConfig.PackageDomainName);


            //更新失败

            Debug.Log($"UnityEvo:切换为加载本地缓存资源...");
            string packageVersion = "";
            if (package.PackageName.Equals("Main"))
            {
                var operation = package.RequestPackageVersionAsync();
                await operation;
                if (operation.Status == EOperationStatus.Succeed)
                {
                    //更新成功
                    packageVersion = operation.PackageVersion;
                    Debug.Log($"Unity:【Main】Request package Version : {packageVersion}");
                }
                else
                {
                    //更新失败
                    Debug.LogError("Unity:【Main】" + operation.Error);
                }
            }
            else
            {
                // 获取上次成功记录的版本
                packageVersion = PlayerPrefs.GetString($"{AppConfig.PackageDomainName}_GAME_VERSION", string.Empty);
                if (string.IsNullOrEmpty(packageVersion))
                {
                    Debug.Log($"UnityEvo:没有找到本地版本记录，需要更新资源！");
                    return;
                }
            }


            Debug.Log($"UnityEvo:获取资源版本 Version : 【{packageVersion}】");
            Debug.Log($"UnityEvo:开始加载本地资源...");
            // Assert.AreEqual(EOperationStatus.Succeed, requetVersionOp.Status);


            // 加载本地缓存的资源清单文件
            var updateManifestOp = package.UpdatePackageManifestAsync(packageVersion);
            await updateManifestOp;
            if (updateManifestOp.Status == EOperationStatus.Succeed)
            {
                //更新成功
                Debug.Log($"UnityEvo:更新本地资源清单 updateManifest : 【成功】");
            }
            else
            {
                //更新失败
                Debug.LogError($"UnityEvo:加载本地资源清单文件失败，需要更新资源！: 【{updateManifestOp.Error}】");
                return;
            }

            Assert.AreEqual(EOperationStatus.Succeed, updateManifestOp.Status);


            //4.下载补丁包
            await Download();


            //加载热更配置文件
            var loadHotfixSettingsOp = package.LoadAssetAsync<DomainConfig>("Config_DomainConfig");
            await loadHotfixSettingsOp;
            DomainConfig domainConfig = null;
            if (loadHotfixSettingsOp.Status == EOperationStatus.Succeed)
            {
                //更新成功
                Debug.Log($"UnityEvo:加载热更配置文件 DomainConfig : 【成功】");
                domainConfig = loadHotfixSettingsOp.AssetObject as DomainConfig;
            }
            else
            {
                Debug.LogError($"UnityEvo:加载热更配置文件 DomainConfig : 【失败】");
            }


            if (domainConfig == null)
            {
                Debug.LogError($"UnityEvo:【{package.PackageName}】加载DomainConfig为空，无法继续执行后续流程，请检查！！！");
            }

            FsmSystem.SetCurState(nameof(HotFixState), domainConfig);
        }

        public override UniTask OnEnterAsync<T>(T param)
        {
            return UniTask.CompletedTask;
        }

        public override UniTask OnEnterAsync<T1, T2>(T1 param1, T2 param2)
        {
            return UniTask.CompletedTask;
        }

        public override void OnUpdate()
        {
            base.OnUpdate();
        }


        public override UniTask OnExitAsync()
        {
            return UniTask.CompletedTask;
        }

        #region 下载热更资源

        public async UniTask Download()
        {
            int downloadingMaxNum = 1;
            int failedTryAgain = 1;
            var package = YooAssets.GetPackage(AppConfig.PackageDomainName);
            var downloader = package.CreateResourceDownloader(downloadingMaxNum, failedTryAgain);

            // 在正常开始游戏之前，还需要验证本地清单内容的完整性。
            if (downloader.TotalDownloadCount > 0)
            {
                Debug.Log("UnityEvo:资源内容本地并不完整，需要更新资源！");
                return;
            }
        }

        #endregion
    }
}