using AttendanceApp.Data.Exceptions;
using AttendanceApp.Data.LocalData;
using AttendanceApp.Domain.Models;

namespace AttendanceApp.Data.Repository
{
    public class GroupRepositoryImpl : IGroupRepository
    {
        private readonly List<LocalGroup> _groups = LocalStaticData.Groups;

        public IEnumerable<Group> GetAllGroups()
        {
            return _groups.Select(g => new Group
            {
                Id = g.Id,
                Name = g.Name
            });
        }

        public Group GetGroupById(int id)
        {
            var localGroup = _groups.FirstOrDefault(g => g.Id == id);
            if (localGroup == null)
                throw new GroupNotFoundException($"Группа с ID {id} не найдена.");

            return new Group
            {
                Id = localGroup.Id,
                Name = localGroup.Name
            };
        }

        public void AddGroup(Group group)
        {
            _groups.Add(new LocalGroup
            {
                Id = group.Id,
                Name = group.Name
            });
        }

        public void UpdateGroup(Group group)
        {
            var localGroup = _groups.FirstOrDefault(g => g.Id == group.Id);
            if (localGroup == null)
                throw new GroupNotFoundException($"Группа с ID {group.Id} не найдена.");

            localGroup.Name = group.Name;
        }

        public void DeleteGroup(int id)
        {
            var group = _groups.FirstOrDefault(g => g.Id == id);
            if (group == null)
                throw new GroupNotFoundException($"Группа с ID {id} не найдена.");

            _groups.Remove(group);
        }
    }
}