using ClosedXML.Excel;
using Demo.Data.RemoteData.RemoteDataBase.DAO;
using Demo.Data.Repository;
using Demo.domain.Models;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Demo.Domain.UseCase
{
    public class UseCaseGeneratePresence
    {
        public readonly IUserRepository _userRepository;
        public readonly IPresenceRepository _presenceRepository;
        private readonly IGroupRepository _groupRepository;

        public UseCaseGeneratePresence(IUserRepository userRepository, IPresenceRepository presenceRepository, IGroupRepository groupRepository)
        {
            _userRepository = userRepository;
            _presenceRepository = presenceRepository;
            _groupRepository = groupRepository;
        }

        public Dictionary<string, List<AttendanceRecord>> GetAllAttendanceByGroups()
        {
            var attendanceByGroup = new Dictionary<string, List<AttendanceRecord>>();
            var allGroups = _groupRepository.GetAllGroups();

            foreach (var group in allGroups)
            {
                var groupAttendance = _presenceRepository.GetAttendanceByGroup(group.Id);
                var attendanceRecords = new List<AttendanceRecord>();

                foreach (var record in groupAttendance)
                {
                    var names = _userRepository.GetUserNames().Where(u => u.UserGuid == record.UserGuid);
                    foreach (var name in names)
                    {
                        attendanceRecords.Add(new AttendanceRecord
                        {
                            UserName = name.FIO,
                            UserGuid = name.UserGuid,
                            Date = record.Date,
                            IsAttedance = record.IsAttedance,
                            LessonNumber = record.LessonNumber,
                            GroupName = group.Name
                        });
                    }
                }

                attendanceByGroup.Add(group.Name, attendanceRecords);
            }

            return attendanceByGroup;
        }

        public void ExportAttendanceToExcel()
        {
            var attendanceByGroup = GetAllAttendanceByGroups();
            string projectDirectory = Directory.GetParent(Directory.GetCurrentDirectory()).Parent.Parent.FullName;
            string reportsFolderPath = Path.Combine(projectDirectory, "Reports");
            string filePath = Path.Combine(reportsFolderPath, "AttendanceReport.xlsx");

            // Создаем папку, если она не существует
            if (!Directory.Exists(reportsFolderPath))
            {
                Directory.CreateDirectory(reportsFolderPath);
            }
            using (var workbook = new XLWorkbook())
            {
                foreach (var group in attendanceByGroup)
                {
                    var worksheet = workbook.Worksheets.Add($"{group.Key}");
                    worksheet.Cell(1, 1).Value = "ФИО";
                    worksheet.Cell(1, 2).Value = "Группа";
                    worksheet.Cell(1, 3).Value = "Дата";
                    worksheet.Cell(1, 4).Value = "Занятие";
                    worksheet.Cell(1, 5).Value = "Статус";

                    int row = 2;
                    int lesNum = 1;
                    foreach (var record in group.Value.OrderBy(r => r.Date).ThenBy(r => r.LessonNumber).ThenBy(r => r.UserGuid))
                    {
                        if (lesNum != record.LessonNumber)
                        {
                            row++;
                        }
                        worksheet.Cell(row, 1).Value = record.UserName;
                        worksheet.Cell(row, 2).Value = record.GroupName;
                        worksheet.Cell(row, 3).Value = record.Date.ToString("dd.MM.yyyy");
                        worksheet.Cell(row, 4).Value = record.LessonNumber;
                        worksheet.Cell(row, 5).Value = record.IsAttedance ? "Присутствует" : "Отсутствует";
                        row++;



                        lesNum = record.LessonNumber;
                    }

                    worksheet.Columns().AdjustToContents();
                }

                workbook.SaveAs(filePath);
            }
        }




        public List<PresenceDao> GetPresenceByDateAndGroup(DateTime date, int groupId)
        {
            return _presenceRepository.GetPresenceByDateAndGroup(date, groupId);
        }

        public void GeneratePresenceDaily(int firstLesson, int lastLesson, int groupId)
        {
            try
            {
                var users = _userRepository.GetAllUsers().Where(u => u.GroupId == groupId).ToList();

                // Находим последнюю дату посещаемости для данной группы
                DateOnly startDate = _presenceRepository.GetLastDateByGroupId(groupId)?.AddDays(1)
                                     ?? DateOnly.FromDateTime(DateTime.Today);

                List<PresenceDao> presences = new List<PresenceDao>();
                for (int lessonNumber = firstLesson; lessonNumber <= lastLesson; lessonNumber++)
                {
                    foreach (var user in users)
                    {
                        var presence = new PresenceDao
                        {
                            UserGuid = user.UserGuid,
                            GroupId = user.GroupId,
                            Date = startDate,
                            LessonNumber = lessonNumber,
                            IsAttedance = true
                        };

                        try
                        {
                            _presenceRepository.SavePresence(new List<PresenceDao> { presence });
                            Console.WriteLine($"Посещаемость добавлена для UserId = {user.UserGuid}, LessonNumber = {lessonNumber} на дату {startDate}");
                        }
                        catch (Exception ex)
                        {
                            Console.WriteLine($"Ошибка при добавлении посещаемости для UserId = {user.UserGuid}: {ex.Message}");
                            if (ex.InnerException != null)
                            {
                                Console.WriteLine($"Inner exception: {ex.InnerException.Message}");
                            }
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Ошибка при генерации посещаемости: {ex.Message}");
                if (ex.InnerException != null)
                {
                    Console.WriteLine($"Inner exception: {ex.InnerException.Message}");
                }
            }
        }




        public void GenerateWeeklyPresence(int firstLesson, int lastLesson, int groupId, DateTime startTime)
        {
            for (int i = 0; i < 7; i++)
            {
                DateTime currentTime = startTime.AddDays(i);
                GeneratePresenceDaily(firstLesson, lastLesson, groupId);
            }
        }



        // Отметить пользователя как отсутствующего на диапазоне занятий
        public void MarkUserAbsentForLessons(Guid UserGuid, int groupId, int firstLesson, int lastLesson, DateTime date)
        {
            List<PresenceDao> presences = _presenceRepository.GetPresenceForAbsent(date, groupId);

            // Обновляем состояние присутствия для указанных занятий
            foreach (var presence in presences.Where(p => p.UserGuid == UserGuid && p.LessonNumber >= firstLesson && p.LessonNumber <= lastLesson))
            {
                presence.IsAttedance = false; // Устанавливаем отсутствие
                Console.WriteLine($"PresenceId: {presence.PresenceId}, UserId: {presence.UserGuid}, Lesson Num:  {presence.LessonNumber}, Att: {presence.IsAttedance}");
            }
            // Сохраняем изменения в репозитории
            _presenceRepository.UpdateAtt(UserGuid, groupId, firstLesson, lastLesson, DateOnly.FromDateTime(date), false);
        }

        public List<PresenceDao> GetAllPresenceByGroup(int groupId)
        {
            return _presenceRepository.GetPresenceByGroup(groupId);
        }

        public void GetGeneralPresence(int groupId)
        {
            _presenceRepository.GetGeneralPresenceForGroup(groupId);
        }



    }
}