using Demo.Data.Exceptions;
using Demo.Data.RemoteData.RemoteDataBase;
using Demo.Data.RemoteData.RemoteDataBase.DAO;
using Demo.domain.Models;
using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace Demo.Data.Repository
{
    public class SQLUserRepositoryImpl : IUserRepository
    {
        private readonly RemoteDatabaseContext _remoteDatabaseContext;

        public SQLUserRepositoryImpl(RemoteDatabaseContext remoteDatabaseContext)
        {
            _remoteDatabaseContext = remoteDatabaseContext;
        }

        public bool RemoveUserById(int userId)
        {
            var user = _remoteDatabaseContext.Users.FirstOrDefault(u => u.UserId == userId);
            if (user == null) throw new UserNotFoundException(userId);

            _remoteDatabaseContext.Users.Remove(user);
            _remoteDatabaseContext.SaveChanges();
            return true;
        }

        public UserDao UpdateUser(int userId, string newFio, int groupId)
        {
            var existingUser = _remoteDatabaseContext.Users.FirstOrDefault(u => u.UserId == userId);
            if (existingUser == null) throw new UserNotFoundException(userId);

            // Обновляем поля существующего пользователя
            existingUser.FIO = newFio;
            existingUser.GroupId = groupId;
            _remoteDatabaseContext.SaveChanges();

            return existingUser;
        }

        public List<UserDao> GetAllUsers()
        {
            // Возвращаем пользователей, отсортированных по UserId
            return _remoteDatabaseContext.Users.OrderBy(u => u.UserId).ToList();
        }

        public List<UserDao> GetUserNames()
        {
            var users = GetAllUsers();
            List<UserDao> names = new List<UserDao>();
            foreach (var user in users)
            {
                names.Add(new UserDao { UserId = user.UserId, FIO = user.FIO });
            }
            return names;
        }
    }
}