using Microsoft.EntityFrameworkCore;
using VOL.Commons;
using VOL.Entity.DomainModels.XinWei;
using YD_YiLu.Api.Context;
using YD_YiLu.Api.Services.Interface;
using YD_YiLu.Api.SmartSportsEntitys;
using YD_YiLu.Api.Utilities;
using YD_YiLu.Commons;
using YD_YiLu.Commons.Dto.DeviceSync;
using YD_YiLu.Commons.Dto.Open;
using YD_YiLu.Commons.Utils;

namespace YD_YiLu.Api.Services.Impl
{
    /// <summary>
    /// 壹动站/壹体屏/活力课间屏 设备同步服务实现
    /// </summary>
    public class DeviceSyncService : IDeviceSyncService
    {
        private readonly SmartSportsContext _context;

        public DeviceSyncService(SmartSportsContext context)
        {
            _context = context;
        }

        public async Task<int?> GetOrgIdByDeviceAsync(string deviceSerial)
        {
            var device = await _context.YL_Device.FirstOrDefaultAsync(x => x.SerialNumber == deviceSerial);
            if (device?.OrgId != null)
                return device.OrgId;
            else return 0;
        }

        public async Task<DeviceSyncUserPageResponseDto> UserPageAsync(DeviceSyncUserPageRequestDto dto)
        {
            var orgId = await GetOrgIdByDeviceAsync(dto.DeviceSerial);
            if (!orgId.HasValue) return new DeviceSyncUserPageResponseDto();

            string schoolCode = await _context.School.Where(x => x.Id == orgId).Select(x => x.SchoolCode).FirstAsync();
            var query = _context.Student.Where(x => x.SchoolCode == schoolCode);

            //if (dto.UserType == 1) query = query.Where(x => false);
            //else if (dto.UserType == 2) { }
            //else if (dto.UserType == 3) query = query.Where(x => false);

            var total = await query.CountAsync();
            var pageIndex = dto.PageIndex < 1 ? 1 : dto.PageIndex;
            var fullSync = dto.FullSync || dto.PageSize <= 0;
            var pageSize = fullSync ? total : (dto.PageSize <= 0 ? 10 : dto.PageSize);
            var listQuery = query.OrderBy(x => x.Id);
            if (!fullSync)
                listQuery = (IOrderedQueryable<S_Student>)listQuery.Skip((pageIndex - 1) * pageSize).Take(pageSize);
            var list = await listQuery
                .Select(s => new DeviceSyncUserDto
                {
                    UserId = s.Id,
                    UserType = 2,
                    Username = s.StudentNo,
                    Nickname = s.StudentName,
                    GradeName = "",
                    OrganizationId = s.ClassId ?? 0,
                    OrganizationName = s.ClassName ?? "",
                    FacePictureUrl = s.Photo ?? "",
                    Identity = "学生",
                    Gender = s.Sex == 1 ? "男" : "女",
                    Birthday = s.Birthday.HasValue ? s.Birthday.Value.ToString("yyyy-MM-dd") : "",
                    UserSerial = s.StudentNo,
                })
                .ToListAsync();

            foreach (var u in list)
            {
                var c = await _context.Class.FindAsync(u.OrganizationId);
                if (c != null)
                {
                    u.OrganizationName = FormatOrganizationName(c, u.OrganizationName);
                    u.GradeName = c.GradeName ?? "";
                }
            }

            return new DeviceSyncUserPageResponseDto
            {
                SyncId = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds(),
                Current = fullSync ? 1 : pageIndex,
                Pages = fullSync ? 1 : (total == 0 ? 0 : (int)Math.Ceiling(total / (double)Math.Max(pageSize, 1))),
                Total = total,
                UserList = list
            };
        }

        public async Task<DeviceSyncUserPageResponseDto> UserSyncAsync(string deviceSerial, int deviceType, int userType)
        {
            return await UserPageAsync(new DeviceSyncUserPageRequestDto
            {
                DeviceSerial = deviceSerial,
                DeviceType = deviceType,
                UserType = userType,
                PageIndex = 1,
                FullSync = true,
                PageSize = 0
            });
        }

        public async Task<List<DeviceSyncOrganizationDto>> OrganizationAsync(DeviceSyncOrganizationRequestDto dto)
        {
            var orgId = await GetOrgIdByDeviceAsync(dto.DeviceSerial);
            if (!orgId.HasValue) return new List<DeviceSyncOrganizationDto>();

            string schoolCode = await _context.School.Where(x => x.Id == orgId).Select(x => x.SchoolCode).FirstAsync();

            var grades = await (
                from g in _context.Grade
                join sg in _context.SchoolAssocGrade
                    on g.Id equals sg.GradeId
                where sg.SchoolCode == schoolCode
                orderby g.Id
                select new
                {
                    g.Id,
                    g.GradeName
                }
            ).ToListAsync();

            var classes = await _context.Class.Where(x => x.SchoolCode == schoolCode).ToListAsync();

            var result = new List<DeviceSyncOrganizationDto>();
            foreach (var g in grades)
            {
                var gradeClasses = classes.Where(x => x.GradeId == g.Id).ToList();
                result.Add(new DeviceSyncOrganizationDto
                {
                    OrganizationId = g.Id,
                    ParentId = 0,
                    ParentName = null,
                    OrganizationName = g.GradeName,
                    OrganizationType = "年级",
                    Children = gradeClasses.Select(c => new DeviceSyncOrganizationDto
                    {
                        OrganizationId = c.Id,
                        ParentId = g.Id,
                        ParentName = g.GradeName,
                        OrganizationName = FormatOrganizationName(c, c.ClassName ?? ""),
                        OrganizationType = "班级",
                        ChildrenIds = new List<int>()
                    }).ToList(),
                    ChildrenIds = gradeClasses.Select(x => x.Id).ToList()
                });
            }
            return result;
        }

        public async Task<List<DeviceSyncTrainPushResponseItem>> TrainPushAsync(List<DeviceSyncTrainPushRequestDto> list)
        {
            if (list == null || !list.Any())
                return new List<DeviceSyncTrainPushResponseItem>();

            var result = new List<DeviceSyncTrainPushResponseItem>();

            // 👉 1. 设备校验（可选，看你业务）
            var orgId = await GetOrgIdByDeviceAsync(list.First().DeviceSerial);
            if (!orgId.HasValue)
                return result;

            // 👉 2. 批量查已存在的 TrainSerial（防重复）
            var normalizedItems = list
                .Where(x => x != null
                    && !string.IsNullOrWhiteSpace(x.DeviceSerial)
                    && !string.IsNullOrWhiteSpace(x.UserSerial))
                .Select(x =>
                {
                    var trainSerial = NormalizeTrainSerial(x.TrainSerial, x);
                    var videoSerial = NormalizeSerial(x.VideoSerial, trainSerial);
                    return new
                    {
                        Item = x,
                        TrainSerial = trainSerial,
                        VideoSerial = videoSerial
                    };
                })
                .ToList();

            if (!normalizedItems.Any())
                return result;

            var trainSerials = normalizedItems.Select(x => x.TrainSerial).Distinct().ToList();

            var existSerials = await _context.YL_Train
                .Where(x => trainSerials.Contains(x.TrainSerial))
                .Select(x => x.TrainSerial)
                .ToListAsync();
            var seenSerials = new HashSet<string>(existSerials, StringComparer.OrdinalIgnoreCase);

            var newEntities = new List<YL_Train>();

            foreach (var normalized in normalizedItems)
            {
                var item = normalized.Item;

                // 👉 3. 唯一校验（跳过已存在）
                if (!seenSerials.Add(normalized.TrainSerial))
                    continue;

                var score = CalculateScore(item);
                if (!score.HasValue || score.Value <= 0)
                    continue;

                var entity = new YL_Train
                {
                    DeviceSerial = item.DeviceSerial,
                    DeviceType = item.DeviceType,
                    UserSerial = item.UserSerial,

                    TrainSerial = normalized.TrainSerial,
                    VideoSerial = normalized.VideoSerial,

                    TrainExam = item.TrainExam,
                    QuizId = item.QuizId,

                    StandardCounts = item.StandardCounts,
                    UnStandardCounts = item.UnStandardCounts,

                    TimeKeeping = item.TimeKeeping,
                    Duration = item.Duration,
                    Distance = item.Distance,

                    CourseId = item.CourseId,

                    StartTime = Util.ParseDateTime(item.StartTime),
                    EndTime = Util.ParseDateTime(item.EndTime),

                    // 👉 成绩计算（建议统一规则）
                    Score = score,

                    IsValid = 1, // 默认有效
                    UploadTime = DateTime.Now,
                    CreateTime = DateTime.Now
                };

                newEntities.Add(entity);
            }

            // 👉 4. 批量入库（关键优化点）
            if (newEntities.Any())
            {
                //var sportsTestValueEntities = await AddSportsTestValueEntity(orgId.Value, newEntities);

                _context.YL_Train.AddRange(newEntities);
                //if (sportsTestValueEntities.Any())
                //    _context.SportsTestValue.AddRange(sportsTestValueEntities);

                await _context.SaveChangesAsync();
            }

            // 👉 5. 返回结果
            result = newEntities.Select(x => new DeviceSyncTrainPushResponseItem
            {
                TrainId = x.Id,
                UserSerial = x.UserSerial
            }).ToList();

            return result;
        }

        private double? CalculateScore(DeviceSyncTrainPushRequestDto item)
        {
            // 👉 根据课目类型决定成绩字段
            // 这里给你一个通用策略（你可以按课目细化）

            // 计数类（跳绳/仰卧起坐）
            if (item.StandardCounts > 0)
                return item.StandardCounts;

            // 计时类（悬垂）
            if (item.TimeKeeping.HasValue)
                return item.TimeKeeping;

            // 距离类（跳远）
            if (item.Distance.HasValue)
                return item.Distance;

            return null;
        }

        private async Task<List<N_SportsTestValue>> AddSportsTestValueEntity(int orgId, List<YL_Train> trains)
        {
            var sportsTestValueEntities = new List<N_SportsTestValue>();
            if (trains == null || !trains.Any())
                return sportsTestValueEntities;

            var userSerials = trains
                .Select(x => x.UserSerial)
                .Where(x => !string.IsNullOrWhiteSpace(x))
                .Distinct()
                .ToList();

            var students = await _context.Student
                .Where(x => userSerials.Contains(x.StudentNo))
                .ToListAsync();

            var classIds = students
                .Where(x => x.ClassId.HasValue)
                .Select(x => x.ClassId.Value)
                .Distinct()
                .ToList();

            var classes = await _context.Class
                .Where(x => classIds.Contains(x.Id))
                .ToListAsync();

            var healthStandards = await _context.HealthStandards.ToListAsync();
            var semesterDto = new SemesterDto();
            var nowTime = DateTime.Now;

            var studentMap = students
                .GroupBy(x => x.StudentNo)
                .ToDictionary(x => x.Key, x => x.First());

            var classMap = classes.ToDictionary(x => x.Id, x => x);

            foreach (var train in trains)
            {
                var value = ResolveSportsTestValue(train);
                if (value == 0)
                    continue;

                if (!studentMap.TryGetValue(train.UserSerial, out var student))
                    continue;

                S_Class? classInfo = null;
                if (student.ClassId.HasValue)
                    classMap.TryGetValue(student.ClassId.Value, out classInfo);

                var category = ResolveSportsTestCategory(train.CourseId);

                var standard = healthStandards.FirstOrDefault(x =>
                    x.CategoryEnum == category.CategoryEnum &&
                    x.GradeId == (classInfo?.GradeId ?? 0) &&
                    x.Sex == student.Sex &&
                    value >= x.MinValue &&
                    value < x.MaxValue);

                var sportsTestValueEntity = new N_SportsTestValue
                {
                    SchoolCode = student.SchoolCode,
                    Sex = student.Sex,
                    DataSource = DataSource.YL,
                    CategoryValue = category.CategoryValue,
                    CategoryEnum = category.CategoryEnum,
                    GradeId = classInfo?.GradeId ?? 0,
                    GradeName = classInfo?.GradeName ?? "",
                    ClassId = student.ClassId ?? 0,
                    ClassName = classInfo?.ClassName ?? student.ClassName ?? "",
                    TeacherId = 0,
                    TeacherName = "",
                    StudentNo = student.StudentNo,
                    StudentName = student.StudentName,
                    Value = value,
                    MotionDuration = train.Duration > 0 ? (int)Math.Ceiling(train.Duration / 60.0) : 0,
                    Consumption = 0,
                    Strength = 0,
                    Score = standard?.Score ?? 0,
                    Rank = standard?.Rank,
                    RankEnum = standard?.Score.GetRank() ?? 0,
                    AdditionalScore = 0,
                    WrongResults = train.UnStandardCounts,
                    Creator = orgId,
                    CreateDate = nowTime,
                    ScoreTime = train.EndTime,
                    Year = semesterDto.Year,
                    Semester = semesterDto.Semester,
                    IsDisplay = true
                };

                sportsTestValueEntities.Add(sportsTestValueEntity);
            }

            return sportsTestValueEntities;
        }

        private static (int CategoryValue, string CategoryEnum) ResolveSportsTestCategory(int courseId)
        {
            var categoryEnum = courseId switch
            {
                3 => nameof(SportsTestItemType.Pull_Up),
                7 => nameof(SportsTestItemType.StandingLongJump),
                8 => nameof(SportsTestItemType.OneMinuteJumpRope),
                23 => nameof(SportsTestItemType.Sit_And_Reach),
                1001 => nameof(SportsTestItemType.BMI),
                1002 => nameof(SportsTestItemType.VitalCapacity),
                _ => Enum.GetName(typeof(CourseType), courseId) ?? courseId.ToString()
            };

            return (courseId, categoryEnum);
        }

        private static float ResolveSportsTestValue(YL_Train train)
        {
            if (train.CourseId == (int)CourseType.StandingLongJump && train.Distance.HasValue)
                return (float)train.Distance.Value;

            if (train.TimeKeeping.HasValue && train.TimeKeeping.Value > 0)
                return (float)train.TimeKeeping.Value;

            if (train.StandardCounts > 0)
                return (float)train.StandardCounts;

            if (train.Distance.HasValue)
                return (float)train.Distance.Value;

            return train.Score.HasValue ? (float)train.Score.Value : 0;
        }

        public async Task<DeviceSyncTrainDetailsDto> TrainDetailsAsync(int trainId)
        {
            // 1. 获取训练记录
            var train = await _context.YL_Train.FirstOrDefaultAsync(t => t.Id == trainId);
            if (train == null) return null;

            // 2. 获取学生信息
            var student = await _context.Student.FirstOrDefaultAsync(s => s.StudentNo == train.UserSerial);
            if (student == null) return null;

            // 3. 最近10次训练记录（CountList）
            var recentTrains = await _context.YL_Train
                .Where(t => t.UserSerial == train.UserSerial && t.CourseId == train.CourseId)
                .OrderByDescending(t => t.StartTime)
                .Take(10)
                .Select(t => new CountListItem
                {
                    TrainId = t.Id,
                    Score = (t.Score ?? 0).ToString("0"), // 先拿数值
                    Time = t.StartTime.ToString("yyyy-MM-dd HH:mm:ss")
                })
                .AsNoTracking() // 可选，提高性能
                .ToListAsync();

            // 在内存中格式化
            var recentTrainsDto = recentTrains
                .Select(t => new CountListItem
                {
                    TrainId = t.TrainId,
                    Score = t.Score, // 格式化整数
                    Time = t.Time
                })
                .ToList();

            // 4. 近10日最佳成绩（DailyList）
            var tenDaysAgo = DateTime.Now.Date.AddDays(-10);

            var dailyScores = await _context.YL_Train
                .Where(t => t.UserSerial == train.UserSerial
                            && t.CourseId == train.CourseId
                            && t.StartTime >= tenDaysAgo)
                .GroupBy(t => t.StartTime.Date)
                .Select(g => new
                {
                    Date = g.Key,
                    MaxScore = g.Max(t => t.Score) ?? 0
                })
                .OrderByDescending(g => g.Date)
                .ToListAsync();

            // 在内存中格式化
            var dailyListDto = dailyScores
                .Select(d => new DailyListItem
                {
                    Score = d.MaxScore.ToString("0"),
                    Time = d.Date.ToString("yyyy-MM-dd 00:00:00")
                })
                .ToList();

            // 5. 课程名称（枚举描述）
            string courseName = Util.GetEnumDescription<CourseType>(train.CourseId);
            var trainClass = await _context.Class.FindAsync(student.ClassId);

            // 6. 返回 DTO
            return new DeviceSyncTrainDetailsDto
            {
                TrainId = train.Id,
                UserSerial = train.UserSerial,
                UserType = 2, // 学生
                Nickname = student.StudentName,
                FacePictureUrl = student.Photo ?? "",
                Identity = "学生",
                OrganizationId = (int)student.ClassId,
                OrganizationName = FormatOrganizationName(trainClass, student.ClassName),
                Gender = student.Sex == 1 ? "男" : "女",
                Score = train.Score?.ToString("0") ?? "0",
                UnStandardCounts = train.UnStandardCounts,
                CourseId = train.CourseId,
                CourseName = courseName,
                TrainType = "自由练习",
                VideoUrl = train.VideoSerial,
                StartTime = train.StartTime.ToString("yyyy-MM-dd HH:mm:ss"),
                EndTime = train.EndTime.ToString("yyyy-MM-dd HH:mm:ss"),
                CountList = recentTrains,
                DailyList = dailyListDto,
                KeyframeList = new List<KeyframeListItem>() // 暂时为空
            };
        }

        public async Task<List<DeviceSyncGradeOrderItemDto>> GradeOrderAsync(DeviceSyncGradeOrderRequestDto dto)
        {
            // 1️⃣ 获取组织ID
            var orgId = await GetOrgIdByDeviceAsync(dto.DeviceSerial);
            if (!orgId.HasValue) return new List<DeviceSyncGradeOrderItemDto>();

            // 2️⃣ 获取学校编码
            string schoolCode = await _context.School
                .Where(x => x.Id == orgId)
                .Select(x => x.SchoolCode)
                .FirstAsync();


            var (start, end) = GetDateRange(dto.DateType, dto.QueryStartTime, dto.QueryEndTime);

            // 4️⃣ 主查询（YL_Train + Student）
            var query = from t in _context.YL_Train
                        join s in _context.Student on t.UserSerial equals s.StudentNo
                        where s.SchoolCode == schoolCode
                        select new { t, s };

            // 5️⃣ 条件过滤
            if (dto.CourseId > 0)
                query = query.Where(x => x.t.CourseId == dto.CourseId.Value);

            if (dto.Gender > 0)
                query = query.Where(x => x.s.Sex == dto.Gender.Value);

            if (dto.OrganizeId != null && dto.OrganizeId.Count > 0 && dto.OrganizeId[0] > 0)
                query = query.Where(x => dto.OrganizeId.Contains(x.s.ClassId ?? 0));

            if (start.HasValue)
                query = query.Where(x => x.t.StartTime >= start.Value);

            if (end.HasValue)
                query = query.Where(x => x.t.StartTime < end.Value.AddDays(1));

            // 6️⃣ 分组求总成绩并排序
            var grouped = await query
                .GroupBy(x => new { x.s.Id, x.s.StudentName, x.s.ClassId, x.s.ClassName, x.s.Sex, x.t.CourseId })
                .Select(g => new
                {
                    Key = g.Key,
                    Score = g.Sum(x => x.t.Score ?? 0)
                })
                .OrderByDescending(x => x.Score)
                .Skip((dto.Page - 1) * dto.Size)
                .Take(dto.Size)
                .ToListAsync();  // ✅ 确保在此处完成

            // 7️⃣ 返回结果
            var classIds = grouped
                .Select(x => x.Key.ClassId ?? 0)
                .Where(x => x > 0)
                .Distinct()
                .ToList();

            var classMap = await _context.Class
                .Where(x => classIds.Contains(x.Id))
                .ToDictionaryAsync(x => x.Id, x => new
                {
                    x.GradeName,
                    x.ClassName
                });

            return grouped.Select(x => new DeviceSyncGradeOrderItemDto
            {
                UserId = x.Key.Id,
                Nickname = x.Key.StudentName,
                OrganizationId = x.Key.ClassId ?? 0,
                OrganizationName = classMap.TryGetValue(x.Key.ClassId ?? 0, out var classInfo)
                    ? $"{classInfo.GradeName ?? ""}{classInfo.ClassName ?? ""}"
                    : x.Key.ClassName ?? "",
                Gender = x.Key.Sex,
                Score = Math.Round(x.Score).ToString("0"),
                CourseId = x.Key.CourseId,
                CourseName = Util.GetEnumDescription<CourseType>(x.Key.CourseId)

            }).ToList();
        }

        public async Task<List<DeviceSyncOrganizationGradeOrderItemDto>> OrganizationGradeOrderAsync(DeviceSyncGradeOrderRequestDto dto)
        {
            var orgId = await GetOrgIdByDeviceAsync(dto.DeviceSerial);
            if (!orgId.HasValue) return new List<DeviceSyncOrganizationGradeOrderItemDto>();

            string schoolCode = await _context.School
                .Where(x => x.Id == orgId)
                .Select(x => x.SchoolCode)
                .FirstAsync();

            var (start, end) = GetDateRange(dto.DateType, dto.QueryStartTime, dto.QueryEndTime);

            var query = from t in _context.YL_Train
                        join s in _context.Student on t.UserSerial equals s.StudentNo
                        where s.SchoolCode == schoolCode
                              && t.Score.HasValue
                              && t.Score.Value > 0
                        select new { t, s };

            if (dto.CourseId.HasValue)
                query = query.Where(x => x.t.CourseId == dto.CourseId.Value);

            if (dto.Gender > 0)
                query = query.Where(x => x.s.Sex == dto.Gender.Value);

            if (dto.OrganizeId != null && dto.OrganizeId.Count > 0 && dto.OrganizeId[0] > 0)
                query = query.Where(x => dto.OrganizeId.Contains(x.s.ClassId ?? 0));

            if (start.HasValue)
                query = query.Where(x => x.t.StartTime >= start.Value);

            if (end.HasValue)
                query = query.Where(x => x.t.StartTime < end.Value.AddDays(1));

            var page = dto.Page < 1 ? 1 : dto.Page;
            var size = dto.Size < 1 ? 10 : dto.Size;

            var grouped = await query
                .GroupBy(x => new { x.s.ClassId, x.s.ClassName, x.t.CourseId })
                .Select(g => new
                {
                    g.Key.ClassId,
                    g.Key.ClassName,
                    g.Key.CourseId,
                    SumScore = g.Sum(x => x.t.Score ?? 0),
                    AvgScore = g.Average(x => x.t.Score ?? 0),
                    SumCount = g.Count()
                })
                .OrderByDescending(x => x.SumScore)
                .Skip((page - 1) * size)
                .Take(size)
                .ToListAsync();

            var organizationClassIds = grouped
                .Select(x => x.ClassId ?? 0)
                .Where(x => x > 0)
                .Distinct()
                .ToList();

            var organizationClassMap = await _context.Class
                .Where(x => organizationClassIds.Contains(x.Id))
                .ToDictionaryAsync(x => x.Id);

            return grouped.Select(x => new DeviceSyncOrganizationGradeOrderItemDto
            {
                OrganizationName = organizationClassMap.TryGetValue(x.ClassId ?? 0, out var classInfo)
                    ? FormatOrganizationName(classInfo, x.ClassName ?? "")
                    : x.ClassName ?? "",
                SumScore = Math.Round(x.SumScore).ToString("0"),
                AvgScore = x.AvgScore.ToString("0.##"),
                SumCount = x.SumCount,
                CourseId = x.CourseId,
                CourseName = Util.GetEnumDescription<CourseType>(x.CourseId)
            }).ToList();
        }

        public async Task<DeviceSyncBestScoreDto> BestScoreAsync(DeviceSyncBestScoreRequestDto dto)
        {
            var orgId = await GetOrgIdByDeviceAsync(dto.DeviceSerial);
            if (!orgId.HasValue) return null;

            string schoolCode = await _context.School
                .Where(x => x.Id == orgId)
                .Select(x => x.SchoolCode)
                .FirstAsync();

            var currentStudent = await _context.Student
                .FirstOrDefaultAsync(x => x.SchoolCode == schoolCode && x.StudentNo == dto.UserSerial);

            if (currentStudent == null)
                return null;

            var currentClass = currentStudent.ClassId.HasValue
                ? await _context.Class.FirstOrDefaultAsync(x => x.Id == currentStudent.ClassId.Value)
                : null;

            var query = from t in _context.YL_Train
                        join s in _context.Student on t.UserSerial equals s.StudentNo
                        where s.SchoolCode == schoolCode
                              && t.CourseId == dto.CourseId
                              && s.Sex == dto.Gender
                              && t.Score.HasValue
                              && t.Score.Value > 0
                        select new { t, s };

            if (dto.Range == 1)
            {
                query = query.Where(x => x.s.ClassId == currentStudent.ClassId);
            }
            else if (dto.Range == 2 && currentClass != null)
            {
                var classIds = await _context.Class
                    .Where(x => x.SchoolCode == schoolCode && x.GradeId == currentClass.GradeId)
                    .Select(x => x.Id)
                    .ToListAsync();

                query = query.Where(x => classIds.Contains(x.s.ClassId ?? 0));
            }

            var best = await query
                .OrderByDescending(x => x.t.Score)
                .ThenBy(x => x.t.StartTime)
                .FirstOrDefaultAsync();

            if (best == null)
                return null;

            var bestClass = best.s.ClassId.HasValue
                ? await _context.Class.FirstOrDefaultAsync(x => x.Id == best.s.ClassId.Value)
                : null;

            return new DeviceSyncBestScoreDto
            {
                UserSerial = best.s.StudentNo,
                Nickname = best.s.StudentName,
                OrganizationId = best.s.ClassId ?? 0,
                OrganizationName = FormatOrganizationName(bestClass, best.s.ClassName ?? ""),
                Gender = best.s.Sex,
                Score = best.t.Score?.ToString("0.##") ?? "0",
                CourseId = best.t.CourseId,
                CourseName = Util.GetEnumDescription<CourseType>(best.t.CourseId)
            };
        }

        public async Task<List<DeviceSyncUserDto>> LastGradeAsync(DeviceSyncLastGradeRequestDto dto)
        {
            if (dto?.UserSerials == null || dto.UserSerials.Count == 0)
                return new List<DeviceSyncUserDto>();

            var serials = dto.UserSerials
                .Where(x => !string.IsNullOrWhiteSpace(x))
                .Select(x => x.Trim())
                .Distinct(StringComparer.OrdinalIgnoreCase)
                .ToList();

            var students = await _context.Student
                .Where(s => serials.Contains(s.StudentNo))
                .ToListAsync();

            var studentSerials = students.Select(s => s.StudentNo).ToList();
            var lastGradeClassIds = students
                .Select(x => x.ClassId ?? 0)
                .Where(x => x > 0)
                .Distinct()
                .ToList();
            var lastGradeClassMap = await _context.Class
                .Where(x => lastGradeClassIds.Contains(x.Id))
                .ToDictionaryAsync(x => x.Id);

            var trains = await _context.YL_Train
                .Where(t => studentSerials.Contains(t.UserSerial))
                .ToListAsync();

            // 👉 人 + 课程 聚合
            var trainGroup = trains
                .GroupBy(t => new { t.UserSerial, t.CourseId })
                .ToDictionary(
                    g => (g.Key.UserSerial, g.Key.CourseId),
                    g => new
                    {
                        Best = g.Max(x => x.Score ?? 0),
                        Last = g.OrderByDescending(x => x.EndTime).FirstOrDefault()?.Score ?? 0
                    });

            // 👉 课程枚举（必须全返回）
            var courseIds = new List<int> { 2, 7, 8, 9, 10, 11 };

            var result = new List<DeviceSyncUserDto>();

            foreach (var serial in serials)
            {
                var st = students.FirstOrDefault(s => s.StudentNo == serial);

                var user = new DeviceSyncUserDto
                {
                    UserId = st?.Id ?? 0,
                    UserType = 0, // 你自己定义
                    Username = st?.StudentNo ?? serial,
                    Nickname = st?.StudentName ?? "",
                    OrganizationId = st?.ClassId ?? 0,
                    OrganizationName = st != null && lastGradeClassMap.TryGetValue(st.ClassId ?? 0, out var lastGradeClass)
                        ? FormatOrganizationName(lastGradeClass, st.ClassName ?? "")
                        : st?.ClassName ?? "",
                    GradeName = "", // 没有就空
                    FacePictureUrl = st?.Photo ?? "",
                    Identity = "", // 可选
                    Gender = st == null ? "" : (st.Sex == 1 ? "男" : "女"),
                    Birthday = st?.Birthday?.ToString("yyyy-MM-dd") ?? "",
                    UserSerial = serial
                };

                // 👉 构造 trainLimitValues
                foreach (var cid in courseIds)
                {
                    if (trainGroup.TryGetValue((serial, cid), out var val))
                    {
                        user.TrainLimitValues.Add(new TrainLimitValueDto
                        {
                            CourseId = cid,
                            BestResult = Math.Round(val.Best).ToString("0"),
                            LastResult = Math.Round(val.Last).ToString("0")
                        });
                    }
                    else
                    {
                        user.TrainLimitValues.Add(new TrainLimitValueDto
                        {
                            CourseId = cid,
                            BestResult = "0",
                            LastResult = "0"
                        });
                    }
                }

                result.Add(user);
            }

            return result;
        }

        public async Task<List<DeviceSyncRecordAppItemDto>> RecordAppAsync(DeviceSyncRecordAppRequestDto dto)
        {
            var orgId = await GetOrgIdByDeviceAsync(dto.DeviceSerial);
            if (!orgId.HasValue)
                return new List<DeviceSyncRecordAppItemDto>();

            // 👉 1. 学校编码
            string schoolCode = await _context.School
                .Where(x => x.Id == orgId)
                .Select(x => x.SchoolCode)
                .FirstAsync();

            // 👉 2. 时间范围
            var (start, end) = GetDateRange(dto.DateType, dto.QueryStartTime, dto.QueryEndTime);

            // 👉 3. 主查询（YL_Train + Student）
            var query = from t in _context.YL_Train
                        join s in _context.Student on t.UserSerial equals s.StudentNo
                        where s.SchoolCode == schoolCode
                        select new { t, s };

            // 👉 4. 条件过滤
            if (dto.CourseId > 0)
                query = query.Where(x => x.t.CourseId == dto.CourseId.Value);

            if (dto.Gender > 0)
                query = query.Where(x => x.s.Sex == dto.Gender.Value);

            if (!string.IsNullOrEmpty(dto.UserSerial))
                query = query.Where(x => x.t.UserSerial == dto.UserSerial);

            if (!string.IsNullOrEmpty(dto.UserName))
                query = query.Where(x => x.s.StudentName.Contains(dto.UserName));

            if (dto.OrganizeId != null && dto.OrganizeId.Count > 0)
                query = query.Where(x => dto.OrganizeId.Contains(x.s.ClassId ?? 0));

            if (start.HasValue)
                query = query.Where(x => x.t.StartTime >= start.Value);

            if (end.HasValue)
                query = query.Where(x => x.t.StartTime < end.Value.AddDays(1));

            // 👉 5. 分页 + 排序
            var list = await query
                .OrderByDescending(x => x.t.StartTime)
                .Skip((dto.Page - 1) * dto.Size)
                .Take(dto.Size)
                .Select(x => new DeviceSyncRecordAppItemDto
                {
                    TrainId = x.t.Id,

                    Nickname = x.s.StudentName,
                    OrganizationId = x.s.ClassId ?? 0,
                    OrganizationName = x.s.ClassName,

                    Gender = x.s.Sex,

                    FacePictureUrl = x.s.Photo,

                    Score = x.t.Score.HasValue ? x.t.Score.Value.ToString("0.##") : "0",

                    StartTime = x.t.StartTime.ToString("yyyy-MM-dd HH:mm:ss"),
                    EndTime = x.t.EndTime.ToString("yyyy-MM-dd HH:mm:ss"),
                    CourseId = x.t.CourseId,
                    CourseName = Util.GetEnumDescription<CourseType>(x.t.CourseId), // 👉 建议后面接字典表
                })
                .ToListAsync();

            var recordClassIds = list
                .Select(x => x.OrganizationId)
                .Where(x => x > 0)
                .Distinct()
                .ToList();

            var recordClassMap = await _context.Class
                .Where(x => recordClassIds.Contains(x.Id))
                .ToDictionaryAsync(x => x.Id);

            foreach (var item in list)
            {
                if (recordClassMap.TryGetValue(item.OrganizationId, out var recordClass))
                    item.OrganizationName = FormatOrganizationName(recordClass, item.OrganizationName);
            }

            return list;
        }

        public async Task<DeviceSyncMyRecordResponseDto> MyRecordAsync(DeviceSyncMyRecordRequestDto dto)
        {
            var result = new DeviceSyncMyRecordResponseDto();

            var orgId = await GetOrgIdByDeviceAsync(dto.DeviceSerial);
            if (!orgId.HasValue) return result;

            // 👉 1. 查学生
            string schoolCode = await _context.School
                .Where(x => x.Id == orgId)
                .Select(x => x.SchoolCode)
                .FirstAsync();

            var student = await _context.Student
                .FirstOrDefaultAsync(x => x.SchoolCode == schoolCode && x.StudentNo == dto.UserSerial);

            if (student == null) return result;

            var c = await _context.Class.FindAsync(student.ClassId);
            result.UserSync = new UserSyncDto
            {
                UserId = student.Id,
                UserType = 2,
                Nickname = student.StudentName,
                OrganizationId = student.ClassId ?? 0,
                OrganizationName = FormatOrganizationName(c, ""),
                FacePictureUrl = student.Photo,
                Identity = "学生",
                Gender = student.Sex == 1 ? "男" : "女",
                Birthday = student.Birthday?.ToString("yyyy-MM-dd") ?? "",
                UserSerial = student.StudentNo,
                Height = "0",
                Weight = "0"
            };

            // 👉 2. 时间范围
            var (start, end) = GetDateRange(dto.DateType, dto.QueryStartTime, dto.QueryEndTime);

            result.UserSync.Identity = "学生";
            result.UserSync.Gender = student.Sex == 1 ? "男" : "女";

            var query = _context.YL_Train
                .Where(x => x.UserSerial == dto.UserSerial
                    && x.DeviceSerial == dto.DeviceSerial
                    && x.DeviceType == dto.DeviceType
                    && x.Score.HasValue
                    && x.Score.Value > 0);

            if (start.HasValue)
                query = query.Where(x => x.StartTime >= start.Value);

            if (end.HasValue)
                query = query.Where(x => x.StartTime < end.Value.AddDays(1));

            if (dto.CourseIdList != null && dto.CourseIdList.Count > 0)
                query = query.Where(x => dto.CourseIdList.Contains(x.CourseId));
            else if (dto.CourseType > 0)
                query = query.Where(x => x.CourseId == dto.CourseType);

            var trains = await query
                .Select(x => new
                {
                    x.CourseId,
                    x.StartTime,
                    x.Duration,
                    x.Score
                })
                .ToListAsync();

            if (!trains.Any())
                return result;

            // 👉 3. 统计
            var trainDays = trains.Select(x => x.StartTime.Date).Distinct().Count();
            var totalSeconds = trains.Sum(x => x.Duration);
            var trainHours = (totalSeconds / 3600.0).ToString("0.00");

            // 👉 4. gradeList（按天统计）
            var gradeList = trains
                .GroupBy(x => x.CourseId)
                .Select(g => new GradeListItem
                {
                    CourseId = g.Key,
                    CourseName = Util.GetEnumDescription<CourseType>(g.Key),
                    BestGrade = (g.Max(x => x.Score) ?? 0).ToString("0.##"),
                    AvgGrade = (g.Average(x => x.Score) ?? 0).ToString("0.##")
                }).ToList();

            // 👉 5. graphTrainList（课目统计）
            var graphList = trains
                .GroupBy(x => x.CourseId)
                .Select(g => new GraphTrainListItem
                {
                    CourseId = g.Key,
                    CourseName = Util.GetEnumDescription<CourseType>(g.Key),
                    Time = g.Sum(x => x.Duration),
                    Count = g.Count()
                }).ToList();

            // 👉 6. courseBestList（最好/平均/最差）
            var courseBestList = trains
                .Where(x => x.Score.HasValue)
                .GroupBy(x => x.CourseId)
                .Select(g => new CourseBestListItem
                {
                    CourseId = g.Key,
                    CourseName = Util.GetEnumDescription<CourseType>(g.Key),
                    BestGrade = g.Max(x => x.Score).ToString(),
                    AvgGrade = g.Average(x => x.Score).ToString(),
                    WorstGrade = g.Min(x => x.Score).ToString()
                }).ToList();

            // 👉 7. 返回
            result = new DeviceSyncMyRecordResponseDto
            {
                UserSync = new UserSyncDto
                {
                    UserId = student.Id,
                    UserType = 2,
                    Nickname = student.StudentName,
                    OrganizationId = student.ClassId ?? 0,
                    OrganizationName = FormatOrganizationName(c, ""),
                    FacePictureUrl = student.Photo,
                    Identity = "学生",
                    Gender = student.Sex == 1 ? "男" : "女",
                    Birthday = student.Birthday?.ToString("yyyy-MM-dd") ?? "",
                    UserSerial = student.StudentNo,
                    Height = "",
                    Weight = ""
                },

                TrainCourseSum = graphList.Count,
                TrainDays = trainDays,
                TrainHours = trainHours,
                TrainCounts = trains.Count,

                GradeList = gradeList,
                GraphTrainList = graphList,
                //CourseBestList = courseBestList
            };
            result.UserSync.Identity = "学生";
            result.UserSync.Gender = student.Sex == 1 ? "男" : "女";
            result.UserSync.Height = "0";
            result.UserSync.Weight = "0";

            return result;
        }

        public async Task<DeviceSyncYtpMyRecordResponseDto> YtpMyRecordAsync(DeviceSyncYtpMyRecordRequestDto dto)
        {
            var result = new DeviceSyncYtpMyRecordResponseDto();

            var orgId = await GetOrgIdByDeviceAsync(dto.DeviceSerial);
            if (!orgId.HasValue) return result;

            var schoolCode = await _context.School
                .Where(x => x.Id == orgId)
                .Select(x => x.SchoolCode)
                .FirstAsync();

            var student = await _context.Student
                .FirstOrDefaultAsync(x => x.SchoolCode == schoolCode && x.StudentNo == dto.UserSerial);

            if (student == null) return result;

            var studentClass = await _context.Class.FindAsync(student.ClassId);
            result.UserSync = new UserSyncDto
            {
                UserId = student.Id,
                UserType = 2,
                Nickname = student.StudentName,
                OrganizationId = student.ClassId ?? 0,
                OrganizationName = FormatOrganizationName(studentClass, student.ClassName ?? ""),
                FacePictureUrl = student.Photo ?? "",
                Identity = "学生",
                Gender = student.Sex == 1 ? "男" : "女",
                Birthday = student.Birthday?.ToString("yyyy-MM-dd") ?? "",
                UserSerial = student.StudentNo,
                Height = "0",
                Weight = "0"
            };
            result.UserSync.Identity = "学生";
            result.UserSync.Gender = student.Sex == 1 ? "男" : "女";

            var (start, end) = GetDateRange(dto.DateType, dto.QueryStartTime, dto.QueryEndTime);

            var query = _context.YL_Train
                .AsNoTracking()
                .Where(x => x.UserSerial == dto.UserSerial
                    && x.DeviceSerial == dto.DeviceSerial
                    && x.DeviceType == dto.DeviceType);

            if (start.HasValue)
                query = query.Where(x => x.StartTime >= start.Value);

            if (end.HasValue)
                query = query.Where(x => x.StartTime < end.Value.AddDays(1));

            var trains = await query
                .Select(x => new
                {
                    x.CourseId,
                    x.StartTime,
                    x.Duration
                })
                .ToListAsync();

            if (!trains.Any())
            {
                var today = DateTime.Now.Date;
                result.GradeList = Enumerable.Range(0, 7)
                    .Select(i => today.AddDays(i - 6))
                    .Select(day => new YtpGradeListItem
                    {
                        Time = day.ToString("yyyy-MM-dd"),
                        Duration = "0",
                        Count = "0"
                    })
                    .ToList();
                return result;
            }

            var totalSeconds = trains.Sum(x => x.Duration);
            result.TrainCourseSum = trains.Select(x => x.CourseId).Distinct().Count();
            result.TrainDays = trains.Select(x => x.StartTime.Date).Distinct().Count();
            result.TrainHours = (totalSeconds / 3600.0).ToString("0.00");
            result.TrainCounts = trains.Count;

            var graphEnd = end?.Date ?? DateTime.Now.Date;
            var graphStart = graphEnd.AddDays(-6);
            result.GradeList = Enumerable.Range(0, 7)
                .Select(i => graphStart.AddDays(i))
                .Select(day =>
                {
                    var dayTrains = trains.Where(x => x.StartTime.Date == day).ToList();
                    return new YtpGradeListItem
                    {
                        Time = day.ToString("yyyy-MM-dd"),
                        Duration = dayTrains.Sum(x => x.Duration).ToString(),
                        Count = dayTrains.Count.ToString()
                    };
                })
                .ToList();

            result.GraphTrainList = trains
                .GroupBy(x => x.CourseId)
                .Select(g => new YtpGraphTrainListItem
                {
                    CourseId = g.Key,
                    CourseName = Util.GetEnumDescription<CourseType>(g.Key),
                    Time = g.Sum(x => x.Duration).ToString(),
                    Count = g.Count()
                })
                .OrderByDescending(x => int.TryParse(x.Time, out var seconds) ? seconds : 0)
                .ToList();

            return result;
        }

        public async Task<TeacherLoginResponseDto> TeacherLoginAsync(TeacherLoginRequestDto dto)
        {
            var pwdHash = MD5Helper.MD5Encrypt32(dto.Password);
            var user = await _context.Sys_User.FirstOrDefaultAsync(x => x.UserName == dto.Username && x.UserPwd == pwdHash);
            if (user == null) return null;

            var school = await _context.School.FirstOrDefaultAsync(x => x.SchoolCode == user.SchoolCode);
            return new TeacherLoginResponseDto
            {
                UserId = user.User_Id,
                Nickname = user.UserTrueName ?? user.UserName,
                Username = user.UserName,
                OrganizationId = school?.Id ?? 0,
                OrganizationName = school?.SchoolName ?? user.SchoolName ?? "",
                SerialNumber = user.UserName,
                Classification = 1,
                Gender = user.Gender
            };
        }


        /// <summary>
        /// 新增app版本
        /// </summary>
        /// <param name="dto"></param>
        /// <returns></returns>
        public async Task<long> AppVersionAddAsync(AppVersionAddRequestDto dto)
        {
            // 1️⃣ 如果设为最新版本，取消旧版本
            if (dto.IsLatest == 1)
            {
                var oldList = await _context.Set<YL_AppVersion>()
                    .Where(x => x.ApplyName == dto.ApplyName
                        && x.DeviceType == dto.DeviceType
                        && x.HardwareType == dto.HardwareType
                        && x.OperatingSystem == dto.OperatingSystem
                        && x.Status == 1)
                    .ToListAsync();

                foreach (var item in oldList)
                {
                    item.IsLatest = 0;
                }
            }

            // 2️⃣ 新版本
            var entity = new YL_AppVersion
            {
                ApplyName = dto.ApplyName,
                DeviceType = dto.DeviceType,
                HardwareType = dto.HardwareType,
                OperatingSystem = dto.OperatingSystem,
                VersionNumber = dto.VersionNumber,
                VersionCode = dto.VersionCode,
                UpdateUrl = dto.UpdateUrl,
                NeedForcedUpdating = dto.NeedForcedUpdating,
                IsLatest = dto.IsLatest,
                Status = 1,
                CreateTime = DateTime.Now
            };

            _context.Set<YL_AppVersion>().Add(entity);
            await _context.SaveChangesAsync();

            return entity.Id;
        }


        public async Task<AppVerifyResponseDto> AppVerifyAsync(AppVerifyRequestDto dto)
        {
            // 1️⃣ 查询最新版本
            var latest = await _context.Set<YL_AppVersion>()
                .Where(x => x.ApplyName == dto.ApplyName
                    && x.DeviceType == dto.DeviceType
                    && x.HardwareType == dto.HardwareType
                    && x.OperatingSystem == dto.OperatingSystem
                    && x.Status == 1
                    && x.PublishStatus == 1)
                .OrderByDescending(x => x.IsLatest)
                .ThenByDescending(x => x.VersionCode)
                .FirstOrDefaultAsync();

            // 2️⃣ 没有配置版本 → 不更新
            if (latest == null)
            {
                return new AppVerifyResponseDto
                {
                    VersionNumber = dto.VersionNumber,
                    NeedForcedUpdating = 0,
                    UpdateUrl = null,
                    HardwareType = dto.HardwareType,
                    ApplyName = dto.ApplyName
                };
            }

            // 3️⃣ 版本比较（必须用 VersionCode）
            int currentVersionCode = ParseVersionCode(dto.VersionNumber);

            bool needUpdate = latest.VersionCode > currentVersionCode;

            if (!needUpdate)
            {
                return new AppVerifyResponseDto
                {
                    VersionNumber = dto.VersionNumber,
                    NeedForcedUpdating = 0,
                    UpdateUrl = null,
                    HardwareType = dto.HardwareType,
                    ApplyName = dto.ApplyName
                };
            }

            // 4️⃣ 是否强制升级
            bool needForce = latest.NeedForcedUpdating == 1;

            // 最低版本限制（强制升级）
            if (!string.IsNullOrEmpty(latest.MinSupportVersion))
            {
                if (CompareVersion(dto.VersionNumber, latest.MinSupportVersion) < 0)
                {
                    needForce = true;
                }
            }

            // 5️⃣ 返回结果
            return new AppVerifyResponseDto
            {
                VersionNumber = latest.VersionNumber,
                NeedForcedUpdating = needForce ? 1 : 0,
                UpdateUrl = latest.UpdateUrl,
                HardwareType = latest.HardwareType,
                ApplyName = latest.ApplyName
            };
        }

        /// <summary>
        /// 视频回放上传
        /// </summary>
        /// <param name="dto"></param>
        /// <returns></returns>
        public async Task<bool> DeviceVideoUploadAsync(DeviceVideoUploadRequestDto dto)
        {
            if (dto.File == null || dto.File.Length == 0)
                return false;

            // 1️⃣ 生成OSS路径（按我之前给你的规范）
            var path = $"Upload/device/{dto.DeviceType}/{dto.DeviceSerial}/video/{dto.VideoSerial}/";

            // 2️⃣ 上传到OSS
            var url = ALiYunOss.Upload(dto.File, path, dto.VideoSerial);

            if (string.IsNullOrEmpty(url))
                return false;

            // 3️⃣ 入库
            var entity = new YL_DeviceVideo
            {
                DeviceSerial = dto.DeviceSerial,
                DeviceType = dto.DeviceType,
                VideoSerial = dto.VideoSerial,
                VideoUrl = url,
                Timestamp = dto.Timestamp,
                CreateTime = DateTime.Now,
                Status = 1
            };

            _context.Set<YL_DeviceVideo>().Add(entity);
            await _context.SaveChangesAsync();

            return true;
        }


        public async Task<DeviceSyncUserDto> GetUserDetailAsync(string deviceSerial, int userId)
        {
            var orgId = await GetOrgIdByDeviceAsync(deviceSerial);
            if (!orgId.HasValue) return null;

            string schoolCode = await _context.School.Where(x => x.Id == orgId).Select(x => x.SchoolCode).FirstAsync();
            var s = await _context.Student.FirstOrDefaultAsync(x => x.Id == userId && x.SchoolCode == schoolCode);
            if (s == null) return null;

            var dto = new DeviceSyncUserDto
            {
                UserId = s.Id,
                UserType = 2,
                Username = s.StudentNo,
                Nickname = s.StudentName,
                OrganizationId = s.ClassId ?? 0,
                OrganizationName = s.ClassName ?? "",
                GradeName = "",
                FacePictureUrl = s.Photo ?? "",
                Identity = "学生",
                Gender = s.Sex == 1 ? "男" : "女",
                Birthday = s.Birthday.HasValue ? s.Birthday.Value.ToString("yyyy-MM-dd") : "",
                UserSerial = s.StudentNo
            };
            var c = await _context.Class.FindAsync(dto.OrganizationId);
            if (c != null)
            {
                dto.OrganizationName = FormatOrganizationName(c, dto.OrganizationName);
                dto.GradeName = c.GradeName ?? "";
            }
            return dto;
        }

        private static string NormalizeTrainSerial(string serial, DeviceSyncTrainPushRequestDto item)
        {
            if (!string.IsNullOrWhiteSpace(serial))
                return NormalizeSerial(serial, "AUTO-" + MD5Helper.MD5Encrypt32(serial));

            var seed = string.Join("|", new[]
            {
                item.DeviceSerial,
                item.UserSerial,
                item.CourseId.ToString(),
                item.TrainExam.ToString(),
                item.StartTime,
                item.EndTime,
                item.Duration.ToString(),
                item.StandardCounts.ToString(),
                item.UnStandardCounts.ToString(),
                item.Distance?.ToString() ?? "",
                item.TimeKeeping?.ToString() ?? ""
            });

            return "AUTO-" + MD5Helper.MD5Encrypt32(seed);
        }

        private static string NormalizeSerial(string serial, string fallback)
        {
            var value = string.IsNullOrWhiteSpace(serial) ? fallback : serial.Trim();
            if (value.Length <= 64)
                return value;

            return "AUTO-" + MD5Helper.MD5Encrypt32(value);
        }

        private static (DateTime? start, DateTime? end) GetDateRange(int dateType, string queryStart, string queryEnd)
        {
            var today = DateTime.Now.Date;
            var weekStart = today.AddDays(-(((int)today.DayOfWeek + 6) % 7));
            var monthStart = new DateTime(today.Year, today.Month, 1);
            (DateTime? start, DateTime? end) result = dateType switch
            {
                0 => ((DateTime?)null, (DateTime?)null),
                1 => (today, today),
                2 => (weekStart, today),
                3 => (monthStart, today),
                4 => (today.Month >= 9 ? new DateTime(today.Year, 9, 1) : new DateTime(today.Year - 1, 9, 1), today),
                5 => (DateTime.TryParse(queryStart, out var s) ? s : (DateTime?)null, DateTime.TryParse(queryEnd, out var e) ? e : (DateTime?)null),
                6 => (weekStart.AddDays(-7), weekStart.AddDays(-1)),
                7 => (monthStart.AddMonths(-1), monthStart.AddDays(-1)),
                8 => (today.AddMonths(-3), today),
                9 => (new DateTime(today.Year, 1, 1), today),
                _ => ((DateTime?)null, (DateTime?)null)
            };

            if (result.start.HasValue && result.end.HasValue && result.start.Value > result.end.Value)
                result = (result.end, result.start);

            return result;
        }

        private static string FormatOrganizationName(S_Class classInfo, string fallback = "")
        {
            if (classInfo == null)
                return fallback ?? "";

            var name = $"{classInfo.GradeName ?? ""}{classInfo.ClassName ?? ""}";
            return string.IsNullOrWhiteSpace(name) ? fallback ?? "" : name;
        }

        private int CompareVersion(string v1, string v2)
        {
            if (string.IsNullOrEmpty(v1) || string.IsNullOrEmpty(v2))
                return 0;

            var arr1 = v1.Split('.');
            var arr2 = v2.Split('.');

            int len = Math.Max(arr1.Length, arr2.Length);

            for (int i = 0; i < len; i++)
            {
                int num1 = i < arr1.Length ? int.Parse(arr1[i]) : 0;
                int num2 = i < arr2.Length ? int.Parse(arr2[i]) : 0;

                if (num1 > num2) return 1;
                if (num1 < num2) return -1;
            }

            return 0;
        }
        private int ParseVersionCode(string version)
        {
            if (string.IsNullOrEmpty(version))
                return 0;

            var parts = version.Split('.');
            int code = 0;

            for (int i = 0; i < parts.Length; i++)
            {
                if (int.TryParse(parts[i], out int num))
                {
                    code = code * 100 + num;
                }
            }

            return code;
        }
    }
}