using GFGGame.Launcher;
using System.Collections;
using UnityEngine;
using YooAsset;
using GFGGame.Launcher;

namespace GFGGame
{
    public class VersionController : SingletonMonoBase<VersionController>
    {
        public const string DefaultPackage = "GameLogic";

        /// <summary>
        /// 包裹的版本信息
        /// </summary>
        public string PackageVersion { set; get; }


        public void Init()
        {
            // 初始化资源系统
            YooAssets.Initialize();
            StartCoroutine(InitVersion());
        }

        public IEnumerator InitVersion()
        {
            yield return InitDefaultPackage();
            if(string.IsNullOrEmpty(LauncherConfig.manifest_v))
            {
                yield return GetStaticVersion(DefaultPackage);
            }
            else
            {
                VersionController.Instance.PackageVersion = LauncherConfig.manifest_v;
            }
            yield return UpdateManifest(DefaultPackage);

            CreateDownloader(DefaultPackage);
        }

        private IEnumerator InitDefaultPackage()
        {
            // 创建默认的资源包
            string packageName = DefaultPackage;
            var package = YooAssets.TryGetPackage(packageName);
            if (package == null)
            {
                package = YooAssets.CreatePackage(packageName);
                YooAssets.SetDefaultPackage(package);
            }

            var playMode = GameLauncher.Instance.PlayMode;
#if !UNITY_EDITOR
            playMode = EPlayMode.HostPlayMode;
#endif
            InitializationOperation initializationOperation = null;
            if (playMode == EPlayMode.EditorSimulateMode)
            {
                // 编辑器下的模拟模式
                var createParameters = new EditorSimulateModeParameters();
                createParameters.SimulateManifestFilePath = EditorSimulateModeHelper.SimulateBuild(packageName);
                initializationOperation = package.InitializeAsync(createParameters);
            }
            else if (playMode == EPlayMode.HostPlayMode)
            {
                // 联机运行模式
                string defaultHostServer = GetHostServerURL(DefaultPackage);
                string fallbackHostServer = defaultHostServer;
                var createParameters = new HostPlayModeParameters();
                //createParameters.DecryptionServices = new GameDecryptionServices();
                createParameters.QueryServices = new GameQueryServices();
                createParameters.RemoteServices = new RemoteServices(defaultHostServer, fallbackHostServer);
                initializationOperation = package.InitializeAsync(createParameters);
            }

            yield return initializationOperation;
            if (initializationOperation.Status != EOperationStatus.Succeed)
            {
                Debug.LogWarning($"{initializationOperation.Error}");
            }
        }

        private IEnumerator GetStaticVersion(string packageName)
        {
            var package = YooAssets.GetPackage(packageName);
            var operation = package.UpdatePackageVersionAsync();
            yield return operation;

            if (operation.Status == EOperationStatus.Succeed)
            {
                VersionController.Instance.PackageVersion = operation.PackageVersion;
                Debug.Log($"远端最新版本为: {operation.PackageVersion}");
            }
            else
            {
                Debug.LogWarning(operation.Error);
            }
        }

        private IEnumerator UpdateManifest(string packageName)
        {
            bool savePackageVersion = true;
            var package = YooAssets.GetPackage(packageName);
            var operation = package.UpdatePackageManifestAsync(VersionController.Instance.PackageVersion, savePackageVersion);
            yield return operation;

            if (operation.Status != EOperationStatus.Succeed)
            {
                Debug.LogWarning(operation.Error);
                Alert.Show("更新版本信息失败，请检测网络链接后重试。")
                        .SetLeftButton(true, "重试", (data) => { StartCoroutine(UpdateManifest(packageName)); });
            }
        }

        private void CreateDownloader(string packageName)
        {
            int downloadingMaxNum = 10;
            int failedTryAgain = 3;
            ResourcePackage package = YooAssets.GetPackage(packageName);
            //ResourceDownloaderOperation downloaderOperation = package.CreateResourceDownloader(new string[] { "preload", "dynamic" }, downloadingMaxNum, failedTryAgain);
            ResourceDownloaderOperation downloaderOperation = package.CreateResourceDownloader(new string[] { "preload" }, downloadingMaxNum, failedTryAgain);

            if (downloaderOperation.TotalDownloadCount == 0)
            {
                LauncherController.OnVersionCompleted();
            }
            else
            {
                //A total of 10 files were found that need to be downloaded
                Debug.Log($"Found total {downloaderOperation.TotalDownloadCount} files that need download ！");

                // 发现新更新文件后，挂起流程系统
                // 注意：开发者需要在下载前检测磁盘空间不足
                int totalDownloadCount = downloaderOperation.TotalDownloadCount;
                long totalDownloadBytes = downloaderOperation.TotalDownloadBytes;
                float sizeMB = totalDownloadBytes / 1048576f;
                sizeMB = Mathf.Clamp(sizeMB, 0.1f, float.MaxValue);
                string totalSizeMB = sizeMB.ToString("f1");
                string message = $"游戏有新的内容，{packageName}需要更新{totalSizeMB}MB大小的内容";
                Alert.Show(message)
                    .SetLeftButton(true, "更新", (data) =>
                    {
                        StartCoroutine(BeginDownload(downloaderOperation, packageName));
                    });
            }
        }

        private IEnumerator BeginDownload(ResourceDownloaderOperation downloaderOperation, string packageName)
        {
            // 注册下载回调
            downloaderOperation.OnDownloadErrorCallback = 
                (fileName, error) =>
                {
                    Debug.LogError($"加载{fileName}失败 {error}");
                };
            downloaderOperation.OnDownloadProgressCallback =
                (totalDownloadCount, currentDownloadCount, totalDownloadSizeBytes, currentDownloadSizeBytes) =>
                {
                    string currentSizeMB = (currentDownloadSizeBytes / 1048576f).ToString("f1");
                    string totalSizeMB = (totalDownloadSizeBytes / 1048576f).ToString("f1");
                    var progress = (float)currentDownloadSizeBytes / totalDownloadSizeBytes;
                    LauncherView.Instance.SetDesc($"正在下载资源，{currentDownloadCount}/{totalDownloadCount}", $"{currentSizeMB}MB/{totalSizeMB}MB", true);
                    LauncherView.Instance.SetProgress((int)(progress * 100));
                };
            downloaderOperation.BeginDownload();
            yield return downloaderOperation;

            // 检测下载结果
            if (downloaderOperation.Status != EOperationStatus.Succeed)
            {
                Alert.Show("下载失败！请检查网络状态后重试。")
                    .SetLeftButton(true, "重试", (data) =>
                    {
                        StartCoroutine(BeginDownload(downloaderOperation, packageName));
                    });
                yield break;
            }
            LauncherController.OnVersionCompleted();
        }

        /// <summary>
        /// 获取资源服务器地址
        /// </summary>
        private string GetHostServerURL(string packageName)
        {
            //string hostServerIP = "http://10.108.64.127";
            string hostServerIP = LauncherConfig.CDN_ROOT;

            string platform = "PC";
#if UNITY_EDITOR
            if (UnityEditor.EditorUserBuildSettings.activeBuildTarget == UnityEditor.BuildTarget.Android)
                platform = "Android";
            else if (UnityEditor.EditorUserBuildSettings.activeBuildTarget == UnityEditor.BuildTarget.iOS)
                platform = "IOS";
            else if (UnityEditor.EditorUserBuildSettings.activeBuildTarget == UnityEditor.BuildTarget.WebGL)
                platform = "WebGL";
#else
		if (Application.platform == RuntimePlatform.Android)
                platform = "Android";
		else if (Application.platform == RuntimePlatform.IPhonePlayer)
                platform = "IOS";
		else if (Application.platform == RuntimePlatform.WebGLPlayer)
                platform = "WebGL";
#endif
            return $"{hostServerIP}/{platform}/{packageName}/HostPlay";
        }
        /// <summary>
        /// 远端资源地址查询服务类
        /// </summary>
        private class RemoteServices : IRemoteServices
        {
            private readonly string _defaultHostServer;
            private readonly string _fallbackHostServer;

            public RemoteServices(string defaultHostServer, string fallbackHostServer)
            {
                _defaultHostServer = defaultHostServer;
                _fallbackHostServer = fallbackHostServer;
            }
            string IRemoteServices.GetRemoteMainURL(string fileName)
            {
                return $"{_defaultHostServer}/{fileName}";
            }
            string IRemoteServices.GetRemoteFallbackURL(string fileName)
            {
                return $"{_fallbackHostServer}/{fileName}";
            }
        }
    }
}