using System;
using System.Collections.Generic;
using System.Diagnostics.Eventing.Reader;
using System.Linq;
using System.Management.Instrumentation;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Shell;
using System.Runtime;

namespace musicschoolapp
{
    /// <summary>
    /// Логика взаимодействия для MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
       
        public MainWindow()
        {
            InitializeComponent();
        }

        private async void registerButton_Click(object sender, RoutedEventArgs e)
        {
            await executeDB(usernameTextBox.Text, passwordBox.Password, true);
        }

        private async void loginButton_Click(object sender, RoutedEventArgs e)
        {
            
            await executeDB(usernameTextBox.Text, passwordBox.Password, false);
            

            //await DbHandlerAsync();

        }
        //async Task DbHandlerAsync()
        //{
        //    await executeDB(usernameTextBox.Text, passwordBox.Password);
        //}
        static async Task<bool> executeDB(string login, string password, bool isreg)
        {
            musicschoolEntities1 musicschoolEntities = new musicschoolEntities1();
            string[] strings = new string[] { login, password };
            var isunique = from s in musicschoolEntities.User where s.username == login select s;
            if (string.Join("", strings) != String.Empty)
            {
                var query = from s in musicschoolEntities.User where s.username == login && s.password == password select s;
                if (query.Count() > 0 && !isreg)
                {
                    MessageBox.Show("Авторизация успешна.");

                    WorkingWindow workingWindow = new WorkingWindow(query.FirstOrDefault());
                    workingWindow.Show();
                    return true;
                }
                else
                {
                    if (isreg && isunique.Count() == 0)
                    {
                        User user = new User();
                        user.username = login;
                        user.password = password;
                        musicschoolEntities.User.Add(user);
                        musicschoolEntities.SaveChanges();
                        MessageBox.Show("Регистрация выполнена.");
                        return true;
                    }
                    else if(isunique.Count() > 0)
                    {
                        MessageBox.Show("Пользователь уже существует.");
                        return false;
                    }
                    MessageBox.Show("Ошибка логина или пароля.");
                    return false;
                }
            }
            else
                MessageBox.Show("заполните все поля!");
            return false;
        }
    }
}