using System;
using System.Collections.Generic;
using System.Linq;
using AttendanceApp.Data.Repository;
using AttendanceApp.Domain.Models;

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

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

        public void GenerateDailyPresence(int firstClassNumber, int lastClassNumber, int groupId, DateTime date)
        {
            var group = _groupRepository.GetGroupById(groupId);
            var users = _userRepository.GetAllUsers().Where(u => u.GroupId == groupId);

            foreach (var user in users)
            {
                for (int classNum = firstClassNumber; classNum <= lastClassNumber; classNum++)
                {
                    var presence = new Presence
                    {
                        ClassDate = date.Date,
                        ClassNumber = classNum,
                        IsPresent = true,
                        UserId = user.Id
                    };
                    _presenceRepository.AddPresence(presence);
                }
            }
        }

        public void GenerateWeeklyPresence(int firstClassNumber, int lastClassNumber, int groupId, DateTime startDate)
        {
            for (int i = 0; i < 7; i++)
            {
                var currentDate = startDate.AddDays(i);
                GenerateDailyPresence(firstClassNumber, lastClassNumber, groupId, currentDate);
            }
        }
    }
}