UP01TASK3/Labaratory/Labaratory/ViewModels/LoginViewModel.cs

using Labaratory.Services;
using System;
using System.Windows;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;
using Wpf.Ui.Input;
using Labaratory.ViewModels;
using Labaratory.Views;

namespace Labaratory
{
    public class LoginViewModel : BaseViewModel
    {
        private string _login;
        private string _password;
        private string _captchaText;
        private string _captchaInput;
        private bool _isCaptchaValid;
        private bool _isLoginEnabled = true;
        private int _failedAttempts = 0;
        private Models.LaboratoryDBEntities db = new Models.LaboratoryDBEntities();
        private Visibility _CapchaVisibility = Visibility.Hidden;

        // Свойства для привязки (Binding)
        public string Login { get => _login; set { _login = value; OnPropertyChanged(); } }
        public string Password
        {
            get => _password;
            set
            {
                if (_password == value) return; // Обязательно!
                _password = value;
                OnPropertyChanged();
            }
        }
        public string CaptchaText { get => _captchaText; set { _captchaText = value; OnPropertyChanged(); } }
        public string CaptchaInput { get => _captchaInput; set { _captchaInput = value; OnPropertyChanged(); } }
        public bool IsCaptchaValid { get => _isCaptchaValid; set { _isCaptchaValid = value; OnPropertyChanged(); } }
        public bool IsLoginEnabled { get => _isLoginEnabled; set { _isLoginEnabled = value; OnPropertyChanged(); } }
        public Visibility CapchaVisibility { get => _CapchaVisibility; set { _CapchaVisibility = value; OnPropertyChanged(); } }

        // Команды
        public ICommand LoginCommand { get; }
        public ICommand RefreshCaptchaCommand { get; }

        public LoginViewModel()
        {
            LoginCommand = new RelayCommand<object>(
                execute => ExecuteLogin(execute),
                canExecute => IsLoginEnabled);
            RefreshCaptchaCommand = new RelayCommand<object>(execute => GenerateNewCaptcha());
        }

        private void GenerateNewCaptcha()
        {
            CaptchaText = Valid.GenerateCaptchaText();
            CaptchaInput = string.Empty;
        }

        private async void ExecuteLogin(object parameter)
        {
            if (CapchaVisibility == Visibility.Visible && !Valid.ValidateCaptcha(CaptchaInput, CaptchaText))
            {
                MessageBox.Show("Неверная капча!");
                GenerateNewCaptcha();
                await LockSystem(10); //Блокировка на 10 сек
                return;
            }

            var user = db.Users.FirstOrDefault(u => u.Login == Login && u.Password == Password);

            if (user != null)
            {
                MessageBox.Show($"Успешный вход! Добро пожаловать, {user.Login}");
                if (parameter is Window window)
                {
                    if (user.Role.Value == 1)
                    {
                        var nextWindow = new AdminWindow();

                        var mainVM = new AdminModel(user);
                        nextWindow.DataContext = mainVM;
                        nextWindow.Show();
                    }
                    if (user.Role.Value == 2)
                    {
                        var nextWindow = new ByhalterWindow();

                        var mainVM = new ByhalterModel(user);
                        nextWindow.DataContext = mainVM;
                        nextWindow.Show();
                    }
                    if (user.Role.Value == 3)
                    {
                        var nextWindow = new Views.Laborant();

                        var mainVM = new ViewModels.Laborant(user);
                        nextWindow.DataContext = mainVM;
                        nextWindow.Show();
                    }
                    if (user.Role.Value == 4)
                    {
                        var nextWindow = new Views.LaborantExplorer();

                        var mainVM = new ViewModels.LaborantExplorer(user);
                        nextWindow.DataContext = mainVM;
                        nextWindow.Show();
                    }
                    window.Close();
                }
            }
            else
            {
                MessageBox.Show("Неверный логин или пароль");
                CapchaVisibility = Visibility.Visible;
                GenerateNewCaptcha();
            }
        }

        private async Task LockSystem(int seconds)
        {
            IsLoginEnabled = false;
            await Task.Delay(TimeSpan.FromSeconds(seconds));
            IsLoginEnabled = true;
        }
    }
}