using Demo.Data.Entity;
using Demo.Data.LocalData;
using System.Collections.Generic;
using System.Linq;

namespace Demo.Domain.UseCase
{
    public class UseCasePresence
    {
        public List<PresenceLocalEntity> GetPresencesByGroupId(int groupId)
        {
            return LocalStaticData.presences
                .Where(p => LocalStaticData.users.Any(u => u.Guid == p.UserGuid && u.GroupID == groupId))
                .ToList();
        }

        public List<PresenceLocalEntity> GetPresencesByGroupIdAndDate(int groupId, DateOnly date)
        {
            return LocalStaticData.presences
                .Where(p => LocalStaticData.users.Any(u => u.Guid == p.UserGuid && u.GroupID == groupId)
                             && p.Date == date)
                .ToList();
        }
        public void MarkUserAsAbsent(Guid userGuid, int startLesson, int endLesson)
        {
            var presences = LocalStaticData.presences
                .Where(p => p.UserGuid == userGuid && p.LessonNumber >= startLesson && p.LessonNumber <= endLesson)
                .ToList();

            foreach (var presence in presences)
            {
                presence.IsAttedance = false;
            }
        }
        public void GenerateDailySchedule(int groupId, int startLesson, int endLesson, DateTime date)
        {
            var usersInGroup = LocalStaticData.users
                .Where(u => u.GroupID == groupId)
                .ToList();
 
            LocalStaticData.presences.RemoveAll(p => usersInGroup.Select(users => users.Guid).Contains(p.UserGuid) && p.Date == DateOnly.FromDateTime(date));
            Console.WriteLine($"Расписание для группы {groupId}:");
            
            foreach (var user in usersInGroup)
            {

                for (int lesson = startLesson; lesson <= endLesson; lesson++)
                {
                    var presence = new PresenceLocalEntity
                    {
                        UserGuid = user.Guid,
                        IsAttedance = true,
                        Date = DateOnly.FromDateTime(date),
                        LessonNumber = lesson
                    };

                    LocalStaticData.presences.Add(presence);

                    Console.WriteLine($"User: {user.Guid}, Attended: {presence.IsAttedance}, Date: {presence.Date}, Lesson: {presence.LessonNumber}");
                }
            }
    
        }
        public void GenerateWeeklySchedule(int groupId, int startLesson, int endLesson, DateTime date)
        {
            for(int i = 0; i < 7;i++)
            {
                GenerateDailySchedule(groupId, startLesson, endLesson, date.AddDays(i));
            }
        }
    }
}