using Microsoft.EntityFrameworkCore;
using VOL.Ai.IServices;
using VOL.Core.EFDbContext;
using VOL.Core.Extensions.AutofacManager;
using VOL.Core.ManageUser;
using VOL.Entity.DomainModels;
using VOL.Entity.DomainModels.YiLu;
using VOL.Entity.Enum;
using VOL.Model;
using VOL.Model.Ai.Request;
using VOL.Model.Ai.Response;

namespace VOL.Ai.Services
{
    public class AiSportsStationService : IAiSportsStationService, IDependency
    {
        private readonly VOLContext _dbContext;

        private static readonly Dictionary<int, string> CourseNames = new()
        {
            { 3, "引体向上" },
            { 7, "立定跳远" },
            { 8, "跳绳" },
            { 9, "开合跳" },
            { 10, "高抬腿" },
            { 11, "深蹲" },
            { 23, "坐位体前屈" },
            { 24, "单脚跳" },
            { 25, "动态臀桥" },
            { 26, "左右跳" },
            { 27, "打地鼠" },
            { 28, "七上八下" },
            { 29, "消灭蚊子" },
            { 30, "石头剪刀布" },
            { 31, "变脸" },
            { 32, "打钉子" },
            { 1001, "体重系数（BMI）" },
            { 1002, "肺活量" }
        };

        public AiSportsStationService(VOLContext dbContext)
        {
            _dbContext = dbContext;
        }

        public async Task<PageDataDto<AiSportsStationDto>> GetAiSportsStationList(AiSportsStationListRequest paramDto)
        {
            paramDto.PageIndex = paramDto.PageIndex <= 0 ? 1 : paramDto.PageIndex;
            paramDto.PageSize = paramDto.PageSize <= 0 ? 10 : paramDto.PageSize;

            var currentUser = UserContext.Current;
            var isAdmin = currentUser?.IsSuperAdmin == true
                          || string.Equals(currentUser?.UserName, "admin", StringComparison.OrdinalIgnoreCase);
            var schoolCode = currentUser?.TenantId;
            int? schoolId = null;

            if (!isAdmin)
            {
                schoolId = await _dbContext.Set<S_School>()
                    .Where(x => x.SchoolCode == schoolCode)
                    .Select(x => (int?)x.Id)
                    .FirstOrDefaultAsync();

                if (schoolId == null)
                {
                    return new PageDataDto<AiSportsStationDto>
                    {
                        Total = 0,
                        TotalPages = 0,
                        PageIndex = paramDto.PageIndex,
                        PageSize = paramDto.PageSize,
                        Datas = new List<AiSportsStationDto>()
                    };
                }
            }

            var studentName = paramDto.StudentName?.Trim();
            var projectName = paramDto.ProjectName?.Trim();
            var sex = GetSexType(paramDto.Sex);

            var query =
                from train in _dbContext.Set<YL_Train>().AsNoTracking()
                join device in _dbContext.Set<YL_Device>().AsNoTracking()
                    on train.DeviceSerial equals device.SerialNumber
                join school in _dbContext.Set<S_School>().AsNoTracking()
                    on device.OrgId equals (int?)school.Id into schoolGroup
                from school in schoolGroup.DefaultIfEmpty()
                join student in _dbContext.Set<S_Student>().AsNoTracking()
                    on new { StudentNo = train.UserSerial, SchoolCode = school.SchoolCode }
                    equals new { student.StudentNo, student.SchoolCode } into studentGroup
                from student in studentGroup.DefaultIfEmpty()
                join studentClass in _dbContext.Set<S_Class>().AsNoTracking()
                    on new { Id = student.ClassId, student.SchoolCode }
                    equals new { studentClass.Id, studentClass.SchoolCode } into classGroup
                from studentClass in classGroup.DefaultIfEmpty()
                select new
                {
                    train.Id,
                    device.OrgId,
                    DeviceSchoolCode = school.SchoolCode,
                    train.CourseId,
                    train.StartTime,
                    train.EndTime,
                    train.Score,
                    // Cast in SQL so int and float columns both materialize as the original int type.
                    StandardCounts = Convert.ToInt32(Convert.ToDouble(train.StandardCounts)),
                    train.UnStandardCounts,
                    train.TimeKeeping,
                    train.Duration,
                    train.Distance,
                    train.UserSerial,
                    StudentName = student == null ? train.UserSerial : student.StudentName,
                    Sex = student == null ? (SexType?)null : student.Sex,
                    ClassId = student == null ? 0 : student.ClassId,
                    ClassName = studentClass == null || studentClass.ClassName == null || studentClass.ClassName == ""
                        ? (student == null ? string.Empty : student.ClassName)
                        : (studentClass.GradeName ?? string.Empty) + studentClass.ClassName
                };

            if (!isAdmin)
            {
                var currentSchoolId = schoolId.GetValueOrDefault();
                query = query.Where(x => x.OrgId == currentSchoolId && x.DeviceSchoolCode == schoolCode);
            }

            if (!string.IsNullOrWhiteSpace(studentName))
                query = query.Where(x => x.StudentName.Contains(studentName));

            if (sex.HasValue)
                query = query.Where(x => x.Sex == sex.Value);

            if (paramDto.ClassId > 0)
                query = query.Where(x => x.ClassId == paramDto.ClassId);

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

            if (paramDto.EndTime.HasValue)
                query = query.Where(x => x.StartTime <= paramDto.EndTime.Value);

            var rows = await query
                .OrderByDescending(x => x.StartTime)
                .ThenByDescending(x => x.Id)
                .ToListAsync();

            if (!string.IsNullOrWhiteSpace(projectName))
                rows = rows.Where(x => GetCourseName(x.CourseId).Contains(projectName)).ToList();

            var total = rows.Count;
            var datas = rows
                .Skip((paramDto.PageIndex - 1) * paramDto.PageSize)
                .Take(paramDto.PageSize)
                .Select((x, index) => new AiSportsStationDto
                {
                    Ind = (paramDto.PageIndex - 1) * paramDto.PageSize + index + 1,
                    StudentName = x.StudentName,
                    Sex = GetSexName(x.Sex),
                    ClassName = string.IsNullOrWhiteSpace(x.ClassName) ? "未匹配班级" : x.ClassName,
                    ProjectName = GetCourseName(x.CourseId),
                    CourseId = x.CourseId,
                    Score = x.Score,
                    StandardCounts = x.StandardCounts,
                    UnStandardCounts = x.UnStandardCounts,
                    TimeKeeping = x.TimeKeeping,
                    Duration = x.Duration,
                    Distance = x.Distance,
                    StartTime = x.StartTime,
                    EndTime = x.EndTime
                })
                .ToList();

            return new PageDataDto<AiSportsStationDto>
            {
                Total = total,
                TotalPages = (int)Math.Ceiling(total / (double)paramDto.PageSize),
                PageIndex = paramDto.PageIndex,
                PageSize = paramDto.PageSize,
                Datas = datas
            };
        }

        private static string GetCourseName(int courseId)
        {
            return CourseNames.TryGetValue(courseId, out var name) ? name : $"待确认课目（编号{courseId}）";
        }

        private static SexType? GetSexType(string sex)
        {
            return sex switch
            {
                "男" => SexType.Male,
                "女" => SexType.Female,
                _ => null
            };
        }

        private static string GetSexName(SexType? sex)
        {
            if (sex == null) return string.Empty;
            return sex == SexType.Male ? "男" : "女";
        }
    }
}