using Demo.Data.LocalData;
using Demo.Data.Repository;
using Demo.domain.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace Demo.Domain.UseCase
{
    public class GroupUseCase
    {
        private List<GroupLocalEntity> _groups = LocalStaticData.groups;

        public List<GroupLocalEntity> GetAllGroups() => _groups;

        public void AddGroup(GroupLocalEntity group)
        {
            group.Id = _groups.Any() ? _groups.Max(g => g.Id) + 1 : 1;
            _groups.Add(group);
        }

        public void UpdateGroup(GroupLocalEntity group)
        {
            var existingGroup = _groups.FirstOrDefault(g => g.Id == group.Id);
            if (existingGroup != null)
            {
                existingGroup.Name = group.Name;
            }
        }
        public void RenameGroup(int groupId, string newName)
        {
            if (string.IsNullOrWhiteSpace(newName))
            {
                throw new ArgumentException("Новое имя группы не может быть пустым", nameof(newName));
            }

            var existingGroup = _groups.FirstOrDefault(g => g.Id == groupId);
            if (existingGroup == null)
            {
                throw new KeyNotFoundException($"Группа с ID {groupId} не найдена.");
            }
            existingGroup.Name = newName;
        }

    }
}