using ClockSnowFlake;
using dy.net.model.dto;
using dy.net.model.entity;
using dy.net.repository;
using dy.net.utils;
using Serilog;
using SqlSugar;
using dy.net.storage;
using Newtonsoft.Json;
using MediaStorageType = dy.net.model.dto.StorageType;

namespace dy.net.service
{
    public class DouyinVideoService
    {

        private readonly ISqlSugarClient sqlSugarClient;

        private readonly DouyinVideoRepository _dyCollectVideoRepository;
        private readonly DouyinCookieRepository douyinCookieRepository;
        private readonly MediaStorageRouter _storageRouter;
        private readonly VideoTaskService _videoTasks;

        public DouyinVideoService(DouyinVideoRepository dyCollectVideoRepository, DouyinCookieRepository douyinCookieRepository, ISqlSugarClient sqlSugarClient, MediaStorageRouter storageRouter, VideoTaskService videoTasks)
        {
            _dyCollectVideoRepository = dyCollectVideoRepository;
            this.douyinCookieRepository = douyinCookieRepository;
            this.sqlSugarClient = sqlSugarClient;
            _storageRouter = storageRouter;
            _videoTasks = videoTasks;
        }

        public async Task<StorageRecordInventory> GetStorageInventoryAsync(MediaStorageType currentStorageType)
        {
            var records = await sqlSugarClient.Queryable<DouyinVideo>()
                .Select(x => new DouyinVideo { StorageType = x.StorageType, FileSize = x.FileSize })
                .ToListAsync();
            var local = records.Where(x => x.StorageType == MediaStorageType.Local).ToList();
            var webDav = records.Where(x => x.StorageType == MediaStorageType.WebDav).ToList();
            var openList = records.Where(x => x.StorageType == MediaStorageType.OpenList).ToList();
            var currentCount = currentStorageType switch
            {
                MediaStorageType.WebDav => webDav.Count,
                MediaStorageType.OpenList => openList.Count,
                _ => local.Count
            };
            return new StorageRecordInventory
            {
                CurrentStorageType = currentStorageType,
                TotalRecordCount = records.Count,
                LocalRecordCount = local.Count,
                WebDavRecordCount = webDav.Count,
                OpenListRecordCount = openList.Count,
                CurrentStorageRecordCount = currentCount,
                OtherStorageRecordCount = records.Count - currentCount,
                LocalDeclaredBytes = local.Sum(x => x.FileSize),
                WebDavDeclaredBytes = webDav.Sum(x => x.FileSize),
                OpenListDeclaredBytes = openList.Sum(x => x.FileSize)
            };
        }


        public async Task<bool> DeleteById(string Id)
        {
            return await _dyCollectVideoRepository.DeleteByIdAsync(Id);
        }

        public async Task<bool> BatchInsertOrUpdate(List<DouyinVideo> videos)
        {
            // 边界处理：传入列表为空直接返回成功
            if (videos == null || !videos.Any())
                return true;

            // 1. 提取所有AwemeId（无需去重，用户保证无重复）
            var allAwemeIds = videos.Select(v => v.AwemeId).ToList();

            // 2. 查询数据库中已存在的视频记录（用于后续更新）
            var existingVideos = await _dyCollectVideoRepository
                .Query(x => allAwemeIds.Contains(x.AwemeId))
                .ToListAsync();

            // 3. 分拆数据集：不存在的（插入）、已存在的（更新）
            var existingAwemeIdSet = existingVideos.Select(v => v.AwemeId).ToHashSet();
            var videosToInsert = videos
                .Where(v => !existingAwemeIdSet.Contains(v.AwemeId))
                .ToList();
            var videosToUpdate = videos
                .Where(v => existingAwemeIdSet.Contains(v.AwemeId))
                .ToList();

            // 4. 事务包裹：确保插入/更新原子性
            var transaction = await _dyCollectVideoRepository.UseTranAsync(async () =>
           {
               int insertedCount = 0;
               int updatedCount = 0;

               // 5. 批量插入新记录
               if (videosToInsert.Any())
               {
                   insertedCount = await _dyCollectVideoRepository.InsertRangeAsync(videosToInsert);
               }

               // 6. 批量更新已存在记录（核心逻辑）
               if (videosToUpdate.Any())
               {
                   // 建立AwemeId与待更新数据的映射（O(1)匹配效率）
                   var updateMap = videosToUpdate.ToDictionary(v => v.AwemeId);

                   // 遍历已存在实体，赋值需要更新的字段
                   List<DouyinVideo> updates = new List<DouyinVideo>();
                   foreach (var existingVideo in existingVideos)
                   {
                       if (updateMap.TryGetValue(existingVideo.AwemeId, out var updateData))
                       {
                           // 保留原记录主键，并把实际主键回写给任务条目使用。
                           updateData.Id = existingVideo.Id;
                           existingVideo.VideoSavePath = updateData.VideoSavePath;
                           existingVideo.VideoCoverSavePath = updateData.VideoCoverSavePath;
                           existingVideo.ViedoType = updateData.ViedoType;
                           existingVideo.StorageType = updateData.StorageType;
                           existingVideo.FileSize = updateData.FileSize;
                           existingVideo.FileHash = updateData.FileHash;
                           existingVideo.Resolution = updateData.Resolution;
                           existingVideo.DynamicVideos = updateData.DynamicVideos;
                           existingVideo.OnlyImgOrOnlyMp3 = updateData.OnlyImgOrOnlyMp3;
                           existingVideo.IsMergeVideo = updateData.IsMergeVideo;
                           existingVideo.VideoUrl = updateData.VideoUrl;
                           existingVideo.AuthorAvatar = updateData.AuthorAvatar;
                           existingVideo.CateId = updateData.CateId;
                           existingVideo.CateXId = updateData.CateXId;
                           existingVideo.SyncTime = updateData.SyncTime;
                       }
                   }
                   // 批量更新数据库
                   updatedCount = await _dyCollectVideoRepository.UpdateRangeAsync(existingVideos);
               }


               //foreach (var item in videos.Where(x=>x.ViedoType==VideoTypeEnum.dy_collects||x.ViedoType == VideoTypeEnum.dy_favorite).GroupBy(x => x.AuthorId))
               //{
                   
               //}

           }, ex =>
           {
               Serilog.Log.Error(ex, "批量插入/更新抖音视频失败，AwemeIds：{AwemeIds}", string.Join(",", allAwemeIds));
           });
            return transaction;
        }

        /// <summary>
        /// 普通同步已经把同一作品提交到远端存储后，安全清理不再被本地记录引用的旧文件。
        /// 数据库或远端主媒体未验证通过时不会删除任何本地文件。
        /// </summary>
        public async Task<int> CleanupSupersededLocalArtifactsAsync(DouyinVideo snapshot, string replacementPath)
        {
            if (snapshot == null || snapshot.StorageType != MediaStorageType.Local
                || string.IsNullOrWhiteSpace(snapshot.AwemeId) || string.IsNullOrWhiteSpace(replacementPath)) return 0;
            var current = await sqlSugarClient.Queryable<DouyinVideo>()
                .Where(x => x.AwemeId == snapshot.AwemeId).FirstAsync();
            if (current == null || !current.StorageType.IsRemote()
                || !string.Equals(current.VideoSavePath, replacementPath, StringComparison.Ordinal))
                throw new InvalidOperationException("新存储记录尚未提交，保留旧本地文件。");
            var remoteLength = await _storageRouter.Resolve(current.StorageType).GetLengthAsync(replacementPath);
            if (!remoteLength.HasValue || remoteLength.Value <= 0)
                throw new InvalidOperationException("新存储主媒体不存在或为空，保留旧本地文件。");

            var cookie = await sqlSugarClient.Queryable<DouyinCookie>().InSingleAsync(snapshot.CookieId);
            var roots = StorageMigrationPathPolicy.GetLocalRoots(cookie);
            if (roots.Count == 0) throw new InvalidOperationException("旧存储根目录不可用，保留旧本地文件。");
            var localVideos = await sqlSugarClient.Queryable<DouyinVideo>()
                .Where(x => x.StorageType == MediaStorageType.Local).ToListAsync();
            var deleted = 0;
            foreach (var candidate in BuildLocalCleanupCandidates(snapshot))
            {
                if (!File.Exists(candidate.Path)) continue;
                if (!SafeLocalMigrationFile.TryResolve(candidate.Path, roots, out var safePath, out var error))
                    throw new InvalidOperationException($"拒绝清理不安全旧路径 {candidate.Path}：{error}");
                if (IsLocalPathReferenced(candidate.Path, localVideos, snapshot.Id, candidate.Shared)) continue;
                File.Delete(safePath);
                deleted++;
            }
            DeleteEmptyParents(snapshot.VideoSavePath, roots);
            return deleted;
        }

        public async Task<int> RetryTaskItemLocalCleanupAsync(string taskId, string itemId)
        {
            var task = await sqlSugarClient.Queryable<VideoDownloadTask>().InSingleAsync(taskId)
                       ?? throw new KeyNotFoundException("任务不存在。");
            if (task.Type != VideoTaskType.Sync)
                throw new InvalidOperationException("仅普通同步任务支持重试旧本地文件清理。");
            var item = await sqlSugarClient.Queryable<VideoDownloadTaskItem>().InSingleAsync(itemId)
                       ?? throw new KeyNotFoundException("任务条目不存在。");
            if (item.TaskId != taskId || !VideoTaskService.CanRetryCleanup(item))
                throw new InvalidOperationException("该条目当前没有可重试的旧本地文件清理。");

            DouyinVideo replacement;
            try
            {
                replacement = JsonConvert.DeserializeObject<DouyinVideo>(item.RetrySnapshotJson);
            }
            catch (JsonException ex)
            {
                throw new InvalidOperationException("旧本地记录快照损坏，无法安全重试清理。", ex);
            }
            var snapshot = replacement?.SupersededStorageSnapshot;
            if (snapshot == null || snapshot.StorageType != MediaStorageType.Local)
                throw new InvalidOperationException("任务没有可验证的旧本地记录快照，拒绝清理。");
            var current = !string.IsNullOrWhiteSpace(item.VideoId)
                ? await sqlSugarClient.Queryable<DouyinVideo>().InSingleAsync(item.VideoId)
                : null;
            current ??= await sqlSugarClient.Queryable<DouyinVideo>()
                .Where(x => x.AwemeId == item.AwemeId).FirstAsync();
            if (current == null)
                throw new InvalidOperationException("当前视频记录不存在，拒绝清理旧文件。");

            try
            {
                var deleted = await CleanupSupersededLocalArtifactsAsync(snapshot, current.VideoSavePath);
                item.CleanupPending = false;
                item.CleanupError = null;
                item.WarningMessage = RemoveCleanupWarning(item.WarningMessage);
                item.Stage = string.IsNullOrWhiteSpace(item.WarningMessage)
                    ? VideoTaskItemStage.Succeeded
                    : VideoTaskItemStage.SucceededWithWarnings;
                item.UpdatedAt = DateTime.Now;
                await sqlSugarClient.Updateable(item).ExecuteCommandAsync();
                await _videoTasks.RefreshCountsAsync(taskId);
                return deleted;
            }
            catch (Exception ex)
            {
                var reason = ex.GetBaseException().Message;
                item.CleanupPending = true;
                item.CleanupError = reason;
                item.UpdatedAt = DateTime.Now;
                await sqlSugarClient.Updateable(item).ExecuteCommandAsync();
                await _videoTasks.RefreshCountsAsync(taskId);
                throw new InvalidOperationException($"旧本地文件清理仍失败：{reason}", ex);
            }
        }

        internal static string RemoveCleanupWarning(string warning)
        {
            if (string.IsNullOrWhiteSpace(warning)) return null;
            var failureIndex = warning.IndexOf("旧本地文件清理失败", StringComparison.Ordinal);
            if (failureIndex < 0) return warning.Trim();
            var start = warning.LastIndexOf("；已切换到", failureIndex, StringComparison.Ordinal);
            if (start >= 0) return warning[..start].Trim().TrimEnd('；');
            start = warning.LastIndexOf("已切换到", failureIndex, StringComparison.Ordinal);
            if (start == 0) return null;
            return warning[..failureIndex].Trim().TrimEnd('；', '，', ',');
        }

        private static List<LocalCleanupCandidate> BuildLocalCleanupCandidates(DouyinVideo snapshot)
        {
            var result = new List<LocalCleanupCandidate>
            {
                new(snapshot.VideoSavePath, false),
                new(snapshot.VideoCoverSavePath, snapshot.ViedoType is VideoTypeEnum.dy_mix or VideoTypeEnum.dy_series),
                new(snapshot.AuthorAvatar, true)
            };
            if (!string.IsNullOrWhiteSpace(snapshot.VideoSavePath))
            {
                var directory = Path.GetDirectoryName(snapshot.VideoSavePath);
                var basename = Path.GetFileNameWithoutExtension(snapshot.VideoSavePath);
                result.Add(new LocalCleanupCandidate(Path.Combine(directory ?? string.Empty, basename + ".nfo"), false));
                if (snapshot.ViedoType is VideoTypeEnum.dy_mix or VideoTypeEnum.dy_series)
                    result.Add(new LocalCleanupCandidate(Path.Combine(directory ?? string.Empty, "tvshow.nfo"), true));
            }
            if (!string.IsNullOrWhiteSpace(snapshot.DynamicVideos))
            {
                try
                {
                    foreach (var attachment in JsonConvert.DeserializeObject<List<DouyinMergeVideoDto>>(snapshot.DynamicVideos) ?? new())
                        result.Add(new LocalCleanupCandidate(attachment.Path, false));
                }
                catch (JsonException) { }
            }
            return result.Where(x => !string.IsNullOrWhiteSpace(x.Path)).DistinctBy(x => x.Path).ToList();
        }

        private static bool IsLocalPathReferenced(string path, IEnumerable<DouyinVideo> localVideos, string excludedVideoId, bool shared)
        {
            foreach (var video in localVideos.Where(x => x.Id != excludedVideoId))
            {
                if (path == video.VideoSavePath || path == video.VideoCoverSavePath || path == video.AuthorAvatar) return true;
                if (shared && !string.IsNullOrWhiteSpace(video.VideoSavePath)
                    && string.Equals(Path.GetDirectoryName(video.VideoSavePath), Path.GetDirectoryName(path), StringComparison.Ordinal)) return true;
                if (!string.IsNullOrWhiteSpace(video.DynamicVideos) && video.DynamicVideos.Contains(path, StringComparison.Ordinal)) return true;
            }
            return false;
        }

        private static void DeleteEmptyParents(string filePath, IReadOnlyList<string> roots)
        {
            if (string.IsNullOrWhiteSpace(filePath)) return;
            var directory = Path.GetDirectoryName(Path.GetFullPath(filePath));
            var root = roots.Where(x => SafeLocalMigrationFile.IsWithin(filePath, x))
                .OrderByDescending(x => x.Length).FirstOrDefault();
            while (!string.IsNullOrWhiteSpace(directory) && !string.Equals(directory, root, StringComparison.Ordinal)
                   && Directory.Exists(directory) && !Directory.EnumerateFileSystemEntries(directory).Any())
            {
                Directory.Delete(directory, false);
                directory = Path.GetDirectoryName(directory);
            }
        }

        private sealed record LocalCleanupCandidate(string Path, bool Shared);

        public async Task<bool> UpdateOne(DouyinVideo video)
        {
            return await _dyCollectVideoRepository.UpdateAsync(video);
        }

        public async Task<VideoStaticsDto> GetStatics()
        {

            List<DouyinVideo> list = await this._dyCollectVideoRepository.GetAllAsync();
            if (!list.Any())
                return new VideoStaticsDto();
            var Categories = list.GroupBy(x => x.Tag1).Select(x => new VideoStaticsItemDto { Name = x.Key, Count = x.LongCount() }).OrderByDescending(p => p.Count).ToList();
            Categories.Where(x => string.IsNullOrWhiteSpace(x.Name)).ToList().ForEach(x => x.Name = "其他");
            var data = new VideoStaticsDto
            {
                AuthorCount = list.Select(x => x.AuthorId).Distinct().Count(),
                CategoryCount = list.Select(x => x.Tag1).Distinct().Count(),
                VideoCount = list.Count,
                Categories = Categories,
                FavoriteCount = list.Count(x => x.ViedoType == VideoTypeEnum.dy_favorite),
                CollectCount = list.Count(x => x.ViedoType == VideoTypeEnum.dy_collects || x.ViedoType == VideoTypeEnum.dy_custom_collect),
                FollowCount = list.Count(x => x.ViedoType == VideoTypeEnum.dy_follows),
                GraphicVideoCount = list.Count(x => x.IsMergeVideo == 1),
                MixCount = list.Count(x => x.ViedoType == VideoTypeEnum.dy_mix),
                SeriesCount = list.Count(x => x.ViedoType == VideoTypeEnum.dy_series),
                VideoSizeTotal = DouyinFileUtils.ConvertBytesToGb(list.Sum(x => x.FileSize)),
                VideoFavoriteSize = DouyinFileUtils.ConvertBytesToGb(list.Where(x => x.ViedoType == VideoTypeEnum.dy_favorite).Sum(x => x.FileSize)),
                VideoCollectSize = DouyinFileUtils.ConvertBytesToGb(list.Where(x => x.ViedoType == VideoTypeEnum.dy_collects || x.ViedoType == VideoTypeEnum.dy_custom_collect).Sum(x => x.FileSize)),
                VideoFollowSize = DouyinFileUtils.ConvertBytesToGb(list.Where(x => x.ViedoType == VideoTypeEnum.dy_follows).Sum(x => x.FileSize)),
                VideoMixSize = DouyinFileUtils.ConvertBytesToGb(list.Where(x => x.ViedoType == VideoTypeEnum.dy_mix).Sum(x => x.FileSize)),
                VideoSeriesSize = DouyinFileUtils.ConvertBytesToGb(list.Where(x => x.ViedoType == VideoTypeEnum.dy_series).Sum(x => x.FileSize)),
                GraphicVideoSize = DouyinFileUtils.ConvertBytesToGb(list.Where(x => x.IsMergeVideo == 1).Sum(x => x.FileSize)),

                //TotalDiskSize= ByteToGbConverter.GetHostTotalDiskSpaceGB(),
            };
            if (data.GraphicVideoSize == "0.00")
            {
                if (list.Where(x => x.IsMergeVideo == 1).Sum(x => x.FileSize) > 0)
                {
                    data.GraphicVideoSize = "<0.01";//避免显示0.00误导用户
                }
            }
            if (data.VideoFavoriteSize == "0.00")
            {
                data.VideoFavoriteSize = "<0.01";//避免显示0.00误导用户
            }

            if (data.VideoCollectSize == "0.00")
            {
                data.VideoCollectSize = "<0.01";//避免显示0.00误导用户
            }
            if (data.VideoFollowSize == "0.00")
            {
                data.VideoFollowSize = "<0.01";//避免显示0.00误导用户
            }
            if (data.VideoMixSize == "0.00")
            {
                data.VideoMixSize = "<0.01";//避免显示0.00误导用户
            }

            if (data.VideoSeriesSize == "0.00")
            {
                data.VideoSeriesSize = "<0.01";//避免显示0.00误导用户
            }
            data.Authors = list.GroupBy(x => x.Author).Select(x => new VideoStaticsItemDto
            {
                Name = x.Key,
                Count = x.LongCount(),
                Icon = x.LastOrDefault()?.AuthorAvatarUrl,
                UperId = x.LastOrDefault()?.AuthorId ?? x.LastOrDefault()?.DyUserId
            }).OrderByDescending(d => d.Count).ToList();
            return data;
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="awemeId"></param>
        /// <returns></returns>
        public async Task<DouyinVideo> GetByAwemeId(string awemeId)
        {
            return await _dyCollectVideoRepository.GetFirstAsync(x => x.AwemeId == awemeId);
        }

        /// <summary>
        /// 
        /// </summary>
        /// <param name="dto"></param>
        /// <returns></returns>
        public async Task<(List<DouyinVideo> list, int totalCount)> GetPagedAsync(DouyinVideoPageRequestDto dto)
        {
            return await _dyCollectVideoRepository.GetPagedAsync(dto);
        }

        public async Task<List<DouyinVideo>> GetAllAsync()
        {
            return await _dyCollectVideoRepository.GetAllAsync();
        }

        /// <summary>
        /// 关注的博主的视频如果配置为视频标题作为文件名，生成文件名
        /// </summary>
        /// <param name="AuthorId"></param>
        /// <param name="ViedoNameSimplify"></param>
        /// <returns></returns>
        public (string, string) GetUperLastViedoFileName(string AuthorId, string ViedoNameSimplify)
        {

            return _dyCollectVideoRepository.GetUperLastViedoFileName(AuthorId, ViedoNameSimplify);
        }

        /// <summary>
        /// 根据ID获取视频信息
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public async Task<DouyinVideo> GetById(string id)
        {
            return await _dyCollectVideoRepository.GetByIdAsync(id);
        }

        /// <summary>
        /// 重新下载选中的视频
        /// </summary>
        /// <param name="dto">重新下载请求DTO（包含待处理视频ID列表）</param>
        /// <returns>是否执行成功（true=流程执行完成，false=无有效数据或执行失败）</returns>
        /// <exception cref="ArgumentNullException">DTO或ID列表为空时抛出</exception>
        /// <exception cref="IOException">文件操作失败时抛出（可根据业务调整处理方式）</exception>
        public async Task<bool> ReDownloadViedoAsync(ReDownViedoDto dto, bool forever = false)
        {
            // 1. 严格参数校验（避免无效流程）
            if (dto == null)
                throw new ArgumentNullException(nameof(dto), "重新下载请求DTO不能为空");
            if (dto.Ids == null || !dto.Ids.Any())
            {
                Serilog.Log.Error("重新下载视频失败：待处理视频ID列表为空");
                return false;
            }

            // 2. 查询有效视频记录（去重+非空校验，避免无效处理）
            var videoIds = dto.Ids.Distinct().ToList(); // 去重，减少数据库查询和操作
            var videos = await _dyCollectVideoRepository.GetByIds(videoIds);
            if (videos == null || !videos.Any())
            {
                Serilog.Log.Debug("未查询到有效视频记录：Ids={0}", string.Join(",", videoIds));
                return false;
            }

            // Permanent deletion is an explicit, separate operation. A normal re-download never removes
            // the database row or old media first; VideoRedownloadWorker replaces the main file atomically.
            if (forever)
            {
                foreach (var video in videos)
                {
                    try
                    {
                        var storage = _storageRouter.Resolve(video.StorageType);
                        if (video.StorageType.IsRemote())
                            await StorageArtifactCleaner.DeleteWebDavArtifactsAsync(storage, video);
                        else
                        {
                            if (!string.IsNullOrWhiteSpace(video.VideoSavePath)) await storage.DeleteAsync(video.VideoSavePath);
                            if (!string.IsNullOrWhiteSpace(video.VideoCoverSavePath)) await storage.DeleteAsync(video.VideoCoverSavePath);
                        }
                        if (!await _dyCollectVideoRepository.DeleteByIdAsync(video.Id)) return false;
                    }
                    catch (Exception ex)
                    {
                        Serilog.Log.Error(ex, "永久删除视频失败，数据库记录已保留：{VideoId}", video.Id);
                        return false;
                    }
                }
                return true;
            }

            // 3. 构建重新下载记录（提前准备数据，避免事务内耗时操作）
            var reDownList = new List<DouyinReDownload>();

            foreach (var video in videos)
            {
                // 跳过无保存路径的视频（避免创建无效任务）
                if (string.IsNullOrWhiteSpace(video.VideoSavePath))
                {
                    Serilog.Log.Debug("视频无保存路径，跳过重新下载：VideoId={0}", video.Id);
                    continue;
                }

                // 构建重新下载记录
                reDownList.Add(new DouyinReDownload
                {
                    Id = Guid.NewGuid().ToString("N"),
                    CreateTime = DateTime.UtcNow, // 统一使用UTC时间，避免时区问题
                    Status = 0, // 0=待下载（建议用枚举替代魔法值）
                    SavePath = video.VideoSavePath,
                    ViedoId = video.AwemeId,
                    CookieId = video.CookieId,
                    VideoRecordId = video.Id,
                    UpdateTime = DateTime.UtcNow
                });
            }

            // 无有效重新下载记录时直接返回
            if (!reDownList.Any())
            {
                Serilog.Log.Debug("无有效重新下载记录需要创建：VideoIds={0}", string.Join(",", videoIds));
                return false;
            }

            try
            {
                var videosById = videos.ToDictionary(x => x.Id);
                var groups = reDownList.GroupBy(x => videosById[x.VideoRecordId].StorageType).ToList();
                var transaction = await sqlSugarClient.Ado.UseTranAsync(async () =>
                {
                    foreach (var group in groups)
                    {
                        var jobs = group.ToList();
                        var storageLabel = group.Key switch
                        {
                            MediaStorageType.WebDav => "WebDAV",
                            MediaStorageType.OpenList => "OpenList",
                            _ => "本地"
                        };
                        var title = groups.Count == 1
                            ? $"重新下载（{jobs.Count} 条）"
                            : $"重新下载 · {storageLabel}（{jobs.Count} 条）";
                        var task = await _videoTasks.CreateTaskAsync(VideoTaskType.Redownload,
                            VideoTaskTrigger.UserAction, title, storageType: group.Key);
                        foreach (var job in jobs)
                        {
                            var video = videosById[job.VideoRecordId];
                            var item = await _videoTasks.AddItemAsync(task.Id, video.AwemeId, video.CookieId, null,
                                video.ViedoType, video.VideoTitle, video.Author, video.VideoSavePath,
                                new[] { video.VideoUrl }, video, video.FileSize);
                            job.TaskId = task.Id;
                            job.TaskItemId = item.Id;
                        }
                        if (await sqlSugarClient.Insertable(jobs).ExecuteCommandAsync() != jobs.Count)
                            throw new InvalidOperationException($"{storageLabel}重新下载队列写入不完整。");
                    }
                });
                if (!transaction.IsSuccess)
                    throw new InvalidOperationException("创建重新下载任务失败：" + transaction.ErrorMessage,
                        transaction.ErrorException);

                //var CookieIds = reDownList.Select(x => x.CookieId).Distinct();
                //foreach (var ck in CookieIds)
                //{
                //    var cookie = douyinCookieRepository.GetById(ck);
                //    if (cookie == null)
                //        continue;
                //    var viedoTypes = videos.Where(x => x.CookieId == ck).Select(x => x.ViedoType).Distinct();

                //    //if (viedoTypes != null && viedoTypes.Any())
                //    //{
                //    //    foreach (VideoTypeEnum item in viedoTypes)
                //    //    {
                //    //        switch (item)
                //    //        {
                //    //            case VideoTypeEnum.dy_favorite:
                //    //                cookie.FavHasSyncd = 0;
                //    //                break;
                //    //            case VideoTypeEnum.dy_collects:
                //    //                cookie.CollHasSyncd = 0;
                //    //                break;
                //    //            case VideoTypeEnum.dy_follows:
                //    //                cookie.UperSyncd = 0;
                //    //                break;
                //    //            case VideoTypeEnum.ImageVideo:
                //    //                break;
                //    //            default:
                //    //                break;
                //    //        }
                //    //    }
                //    //}
                //    await douyinCookieRepository.UpdateAsync(cookie);

                //}
                Serilog.Log.Debug("安全重新下载任务已创建：{0} 条；旧记录和旧文件会保留到新主媒体完整写入。", reDownList.Count);
                return true;
            }
            catch (Exception ex)
            {
                Serilog.Log.Error(ex, "重新下载视频执行失败：Ids={0}", string.Join(",", videoIds));
                return false;
            }
        }



        public async Task<List<DouyinVideoTopDto>> GetLastSyncTop(int top = 5)
        {
            return await _dyCollectVideoRepository.GetTopsOrderBySyncTime(top);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public async Task<List<VideoChartItemDto>> GetChartData(int day = 7)
        {

            var date = DateTime.Now.AddDays(-day);
            var list = await _dyCollectVideoRepository.GetListAsync(x => x.SyncTime > date);

            var resultData = list.GroupBy(x => x.SyncTime.ToString("yyyyMMdd")).Select(g => new VideoChartItemDto
            {
                Date = g.Key,
                Collect = g.Count(x => x.ViedoType == VideoTypeEnum.dy_collects || x.ViedoType == VideoTypeEnum.dy_custom_collect),
                Favorite = g.Count(x => x.ViedoType == VideoTypeEnum.dy_favorite),
                Follow = g.Count(x => x.ViedoType == VideoTypeEnum.dy_follows),
                Graphic = g.Count(x => string.IsNullOrEmpty(x.FileHash)),
                Mix = g.Count(x => x.ViedoType == VideoTypeEnum.dy_mix),
                Series = g.Count(x => x.ViedoType == VideoTypeEnum.dy_series),
            })
              .ToList();
            return resultData;
        }

        /// <summary>
        /// 删除无效记录（记录存在，用户手动把目录下的视频删了的情况，视频记录依然存在）
        /// </summary>
        /// <returns></returns>
        public async Task<List<DeleteInvalidVideoDto>> DeleteInvalidVideo()
        {
            var videos = await _dyCollectVideoRepository.GetAllAsync();
            List<DeleteInvalidVideoDto> vList = new List<DeleteInvalidVideoDto>();

            List<string> douyinVideoIds = new List<string>();
            foreach (var v in videos)
            {
                if (v.OnlyImgOrOnlyMp3 && string.IsNullOrWhiteSpace(v.VideoSavePath)) continue;
                if (!await _storageRouter.Resolve(v.StorageType).ExistsAsync(v.VideoSavePath))
                {
                    douyinVideoIds.Add(v.Id);
                    vList.Add(new DeleteInvalidVideoDto { AwId = v.AwemeId, Title = v.VideoTitle, Path = v.VideoSavePath });
                }
            }

            if (douyinVideoIds.Any())
            {
                await _dyCollectVideoRepository.DeleteByIdsAsync(douyinVideoIds);
            }

            return vList;
        }

        /// <summary>
        /// 根据博主ID获取视频列表
        /// </summary>
        /// <param name="uperUid"></param>
        /// <returns></returns>
        internal async Task<List<DouyinVideo>> GetByAuthorId(string uperUid)
        {
            return await _dyCollectVideoRepository.GetListAsync(x => x.DyUserId == uperUid);
        }


        internal async Task<int> AddDeleteVideo(List<DouyinVideo> videos)
        {
            var awemeIds = videos.Select(x => x.AwemeId).Where(x => !string.IsNullOrWhiteSpace(x)).Distinct().ToList();
            var existing = await sqlSugarClient.Queryable<DouyinVideoDelete>()
                .Where(x => awemeIds.Contains(x.ViedoId)).Select(x => x.ViedoId).ToListAsync();
            var deletes = videos.Where(video => !existing.Contains(video.AwemeId)).Select(video => new DouyinVideoDelete
            {
                ViedoId = video.AwemeId,
                VideoTitle = video.VideoTitle,
                VideoSavePath = video.VideoSavePath,
                Id = IdGener.GetLong().ToString(),
                DeleteTime = DateTime.Now,
                CookieId = video.CookieId,
                VideoType = video.ViedoType,
                AuthorId = video.AuthorId,
                Author = video.Author,
                VideoUrl = video.VideoUrl,
                RestoreSnapshotJson = JsonConvert.SerializeObject(video)
            })?.ToList();

            if (deletes.Count > 0) await sqlSugarClient.Insertable<DouyinVideoDelete>(deletes).ExecuteCommandAsync();
            return existing.Distinct().Count() + deletes.Count;
        }

        /// <summary>
        /// 彻底删除视频
        /// </summary>
        /// <param name="Ids"></param>
        /// <returns></returns>
        public async Task<bool> RealDeleteVideos(List<string> Ids)
        {
            if (Ids == null || !Ids.Any())
                return false;
            var videos = await _dyCollectVideoRepository.GetListAsync(x => Ids.Contains(x.Id));

            if (videos != null && videos.Count > 0)
            {
                if (videos.Count <= 30)
                {
                    var deletes = await AddDeleteVideo(videos);
                    if (deletes < videos.Select(x => x.AwemeId).Distinct().Count())
                    {
                        Serilog.Log.Error("写入永久排除记录失败，已停止删除媒体");
                        return false;
                    }
                    var result = await ReDownloadViedoAsync(new ReDownViedoDto { Ids = videos.Select(x => x.Id)?.ToList() }, true);
                    if (result)
                    {
                        Serilog.Log.Debug($"批量永久删除博主{videos.FirstOrDefault()?.Author}，共{deletes}条记录");
                        return true;
                    }
                    else
                    {
                        Serilog.Log.Error($"批量删除{videos.FirstOrDefault()?.Author}视频失败");
                        return false;
                    }
                }
                else
                {
                    Task.Run(async () =>
                    {
                        var deletes = await AddDeleteVideo(videos);
                        if (deletes < videos.Select(x => x.AwemeId).Distinct().Count())
                        {
                            Serilog.Log.Error("写入永久排除记录失败，已停止后台删除媒体");
                            return;
                        }
                        var result = await ReDownloadViedoAsync(new ReDownViedoDto { Ids = videos.Select(x => x.Id)?.ToList() }, true);
                        if (result)
                        {
                            Serilog.Log.Debug($"批量永久删除博主{videos.FirstOrDefault()?.Author}，{deletes}条记录");
                        }
                        else
                        {
                            Serilog.Log.Error($"批量删除{videos.FirstOrDefault()?.Author}视频失败");
                        }
                    });
                    return true;
                }
            }
            else
            {
                Serilog.Log.Error($"没有查询到可删除的视频");
                return false;
            }

        }

        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        public async Task<bool> HandOldFolderVideos()
        {
            // 1. 查询目标数据
            var list = await _dyCollectVideoRepository.GetListAsync(x => x.ViedoType == VideoTypeEnum.dy_favorite || x.ViedoType == VideoTypeEnum.dy_collects);
            // 缓存已处理的「Tag1+下一级文件夹」组合（避免重复移动）
            var processedFolderPairs = new HashSet<string>(StringComparer.OrdinalIgnoreCase);

            foreach (var item in list)
            {
                // 跳过空值（Tag1/Author为空）
                if (string.IsNullOrEmpty(item.Tag1) || string.IsNullOrEmpty(item.Author))
                {
                    Log.Debug($"跳过：Tag1/Author为空，ItemId={item.Id}");
                    continue;
                }

                try
                {
                    // 2. 标准化路径 + 拆分路径层级（核心：精准定位Tag1和其下一级文件夹）
                    string oldVideoPath = item.VideoSavePath;
                    // 统一分隔符为/，方便拆分层级
                    string standardPath = oldVideoPath.Replace('\\', '/').Trim('/');
                    string[] pathSegments = standardPath.Split('/'); // 拆分结果：["app","collect","校园教育","期末复习xxx","文件.mp4"]

                    // 2.1 找到Tag1在路径中的索引（比如"校园教育"的索引是2）
                    int tag1Index = Array.IndexOf(pathSegments, item.Tag1);
                    if (tag1Index == -1 || tag1Index + 1 >= pathSegments.Length - 1)
                    {
                        Log.Debug($"跳过：无Tag1下一级文件夹，Path={oldVideoPath}，Tag1={item.Tag1}");
                        continue;
                    }

                    // 2.2 解析核心路径（关键！）
                    string tag1FolderRelative = string.Join("/", pathSegments.Take(tag1Index + 1)); // Tag1根目录（相对）：app/collect/校园教育
                                                                                                    // Tag1根目录完整路径（如 D:/app/collect/校园教育 或 /app/collect/校园教育）
                    string tag1RootFolderFull = Path.GetFullPath(
                        Path.Combine(Path.GetPathRoot(oldVideoPath) ?? "",
                        tag1FolderRelative.Replace('/', Path.DirectorySeparatorChar))
                    );
                    string tag1NextLevelFolderName = pathSegments[tag1Index + 1]; // Tag1下一级文件夹名：期末复习xxx
                                                                                  // Tag1下一级文件夹完整路径：app/collect/校园教育/期末复习xxx
                    string tag1NextLevelFolderFull = Path.GetFullPath(
                        Path.Combine(tag1RootFolderFull, tag1NextLevelFolderName)
                    );

                    // 2.3 拼接新路径（替换Tag1为Author，保留下一级文件夹名）
                    // 新Author根目录完整路径：app/collect/张三
                    string authorRootFolderFull = tag1RootFolderFull.Replace(item.Tag1, item.Author);
                    // 新的下一级文件夹完整路径：app/collect/张三/期末复习xxx
                    string authorNextLevelFolderFull = Path.GetFullPath(
                        Path.Combine(authorRootFolderFull, tag1NextLevelFolderName)
                    );

                    // 2.4 防重复处理（Tag1下一级文件夹已处理则跳过）
                    string folderPairKey = $"{tag1NextLevelFolderFull}|{authorNextLevelFolderFull}";
                    if (processedFolderPairs.Contains(folderPairKey))
                    {
                        Log.Debug($"跳过：下一级文件夹已处理，Key={folderPairKey}");
                        continue;
                    }

                    // 3. 核心判断：检查Tag1的下一级文件夹是否有文件（而非Tag1根目录）
                    if (!Directory.Exists(tag1NextLevelFolderFull))
                    {
                        Log.Warning($"跳过：Tag1下一级文件夹不存在，Path={tag1NextLevelFolderFull}");
                        continue;
                    }
                    string[] nextLevelFiles = Directory.GetFiles(tag1NextLevelFolderFull); // 非递归，只查该文件夹下的文件
                    if (nextLevelFiles.Length == 0)
                    {
                        Log.Debug($"跳过：Tag1下一级文件夹无文件，Path={tag1NextLevelFolderFull}");
                        processedFolderPairs.Add(folderPairKey);
                        continue;
                    }

                    // 4. 移动Tag1的下一级文件夹（保留文件夹名，整体移动到Author目录下）
                    // 4.1 确保新Author目录存在
                    Directory.CreateDirectory(authorRootFolderFull);

                    // 4.2 目标文件夹已存在则跳过（如需覆盖，可删除此行+添加Directory.Delete(authorNextLevelFolderFull, true)）
                    if (Directory.Exists(authorNextLevelFolderFull))
                    {
                        Log.Debug($"跳过：目标下一级文件夹已存在，Path={authorNextLevelFolderFull}");
                        processedFolderPairs.Add(folderPairKey);
                        continue;
                    }

                    // 4.3 移动整个下一级文件夹（保留名称和内部所有文件）
                    Directory.Move(tag1NextLevelFolderFull, authorNextLevelFolderFull);
                    Log.Debug($"移动Tag1下一级文件夹成功：{tag1NextLevelFolderFull} → {authorNextLevelFolderFull}");

                    // 5. 关键新增：检查Tag1根目录是否为空，为空则删除
                    if (Directory.Exists(tag1RootFolderFull))
                    {
                        // 检查Tag1根目录下是否还有任何文件/文件夹
                        bool isTag1RootEmpty = !Directory.EnumerateFileSystemEntries(tag1RootFolderFull).Any();
                        if (isTag1RootEmpty)
                        {
                            Directory.Delete(tag1RootFolderFull, false); // false=仅删除空目录，避免误删
                            Log.Debug($"删除空Tag1根目录：{tag1RootFolderFull}");
                        }
                        else
                        {
                            Log.Debug($"Tag1根目录非空，不删除：{tag1RootFolderFull}");
                        }
                    }

                    // 标记已处理
                    processedFolderPairs.Add(folderPairKey);

                    // 6. 更新当前Item的视频路径（替换Tag1为Author，保留后续层级）
                    string newVideoPath = oldVideoPath.Replace(item.Tag1, item.Author);
                    item.VideoSavePath = newVideoPath;
                    Log.Debug($"更新Item路径：{oldVideoPath} → {newVideoPath}");
                }
                catch (IOException ex)
                {
                    Log.Error(ex, $"移动失败（IO异常），ItemId={item.Id}，Path={item.VideoSavePath}");
                }
                catch (UnauthorizedAccessException ex)
                {
                    Log.Error(ex, $"删除/移动失败（权限不足），ItemId={item.Id}，Path={item.VideoSavePath}");
                }
                catch (Exception ex)
                {
                    Log.Error(ex, $"处理失败（未知错误），ItemId={item.Id}，Path={item.VideoSavePath}");
                }
            }

            // 批量更新数据库
            if (list.Any())
            {
                await BatchInsertOrUpdate(list);
                Log.Debug($"批量更新数据库完成，共处理{list.Count}条数据");
            }

            return true;
        }

    }
}