using Demo.Data.Repository;
using Demo.domain.Models;
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 List<PresenceLocalEntity> GetPresenceByGroupAndDate(int groupId, DateTime date)
        {
            return _presenceRepository.GetPresenceByGroupAndDate(groupId, date);
        }


        public void GeneratePresenceForDay(int firstLesson, int lastLesson, int groupId, DateTime currentDate)
        {
            // Проверка существования группы
            var groupExists = _groupRepository.GetAllGroup().Any(g => g.Id == groupId);
            if (!groupExists)
            {
                throw new ArgumentException($"Группа с ID {groupId} не существует.");
            }

            var users = _userRepository.GetAllUsers.Where(u => u.GroupID == groupId).ToList();
            List<PresenceLocalEntity> presences = new List<PresenceLocalEntity>();
            for (int lessonNumber = firstLesson; lessonNumber <= lastLesson; lessonNumber++)
            {
                foreach (var user in users)
                {
                    presences.Add(new PresenceLocalEntity
                    {
                        UserGuid = user.Guid,
                        Date = currentDate,
                        LessonNumber = lessonNumber,
                        IsAttedance = true
                    });
                }
            }
            _presenceRepository.SavePresence(presences);
        }

        public void GeneratePresenceForWeek(int firstLesson, int lastLesson, int groupId, DateTime startTime)
        {
            // Проверка существования группы
            var groupExists = _groupRepository.GetAllGroup().Any(g => g.Id == groupId);
            if (!groupExists)
            {
                throw new ArgumentException($"Группа с ID {groupId} не существует.");
            }

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




        public void MarkUserAsAbsent(Guid userGuid, int groupId, int firstLesson, int lastLesson, DateTime date)
        {
            var presences = _presenceRepository.GetPresenceByGroupAndDate(groupId, date);
            foreach (var presence in presences.Where(p => p.UserGuid == userGuid && p.LessonNumber >= firstLesson && p.LessonNumber <= lastLesson))
            {
                presence.IsAttedance = false;
            }
            _presenceRepository.SavePresence(presences);
        }



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

        public GroupPresenceSummary GetGeneralPresenceForGroup(int groupId)
        {
            return _presenceRepository.GetGeneralPresenceForGroup(groupId);
        }
        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 List<PresenceLocalEntity> GetPresenceByGroupAndDate(int groupId, DateTime date)
            {
                return _presenceRepository.GetPresenceByGroupAndDate(groupId, date);
            }


            public void GeneratePresenceForDay(int firstLesson, int lastLesson, int groupId, DateTime currentDate)
            {
                // Проверка существования группы
                var groupExists = _groupRepository.GetAllGroup().Any(g => g.Id == groupId);
                if (!groupExists)
                {
                    throw new ArgumentException($"Группа с ID {groupId} не существует.");
                }

                var users = _userRepository.GetAllUsers.Where(u => u.GroupID == groupId).ToList();
                List<PresenceLocalEntity> presences = new List<PresenceLocalEntity>();
                for (int lessonNumber = firstLesson; lessonNumber <= lastLesson; lessonNumber++)
                {
                    foreach (var user in users)
                    {
                        presences.Add(new PresenceLocalEntity
                        {
                            UserGuid = user.Guid,
                            Date = currentDate,
                            LessonNumber = lessonNumber,
                            IsAttedance = true
                        });
                    }
                }
                _presenceRepository.SavePresence(presences);
            }

            public void GeneratePresenceForWeek(int firstLesson, int lastLesson, int groupId, DateTime startTime)
            {
                // Проверка существования группы
                var groupExists = _groupRepository.GetAllGroup().Any(g => g.Id == groupId);
                if (!groupExists)
                {
                    throw new ArgumentException($"Группа с ID {groupId} не существует.");
                }

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

            public void MarkUserAsAbsent(Guid userGuid, int groupId, int firstLesson, int lastLesson, DateTime date)
            {
                var presences = _presenceRepository.GetPresenceByGroupAndDate(groupId, date);
                foreach (var presence in presences.Where(p => p.UserGuid == userGuid && p.LessonNumber >= firstLesson && p.LessonNumber <= lastLesson))
                {
                    presence.IsAttedance = false;
                }
                _presenceRepository.SavePresence(presences);
            }
        }
    }
}