using Renci.SshNet;
using ResevalnaScanner.Classes;
using System;
using System.Collections.Generic;
using System.Data;
using System.Threading.Tasks;
using System.Windows;
using InfosysPublisher.Classes;
using Microsoft.Data.SqlClient;

namespace InfosysPublisher
{
    /// <summary>
    /// Interaction logic for WinLogin.xaml
    /// </summary>
    public partial class WinLogin : Window
    {
        public WinLogin()
        {
            InitializeComponent();

        }

        private async void Login_OnClick(object sender, RoutedEventArgs e)
        {
            var succeeded = false;
            var isLockedOut = false;

            var username = tbUsername.Text;
            var password = tbPassword.Password;
            User user = null;

            await Task.Run(() =>
            {
                using var sqlConnection = new SqlConnection(App.SqlConnectionString);
                sqlConnection.Open();

                var sqlCommandString = @"
SELECT ID_Uporabnik,
       UporabniskoIme,
       Ime,
       Priimek,
       GesloBytes,
       SaltBytes,
       Aktiven
FROM Uporabnik
WHERE UporabniskoIme = @uporabniskoIme
    AND GesloBytes IS NOT NULL 
    AND SaltBytes IS NOT NULL"
                ;

                using var sqlCommand = new SqlCommand(sqlCommandString, sqlConnection);
                sqlCommand.Parameters.AddWithValue("uporabniskoIme", username);

                using var sqlDataReader = sqlCommand.ExecuteReader();
                if (sqlDataReader.Read())
                {
                    if (sqlDataReader.GetString("UporabniskoIme") == username
                        && Encryption.CompareByteArrays(Encryption.CreatePasswordHash(password, (byte[])sqlDataReader.GetValue("SaltBytes")).Hash, (byte[])sqlDataReader.GetValue("GesloBytes")))
                    {
                        if (sqlDataReader.GetBoolean("Aktiven"))
                        {
                            user = new User
                            {
                                Id = sqlDataReader.GetInt32(sqlDataReader.GetOrdinal("ID_Uporabnik")),
                                Name = sqlDataReader.GetString(sqlDataReader.GetOrdinal("Ime")),
                                Surname = sqlDataReader.GetString(sqlDataReader.GetOrdinal("Priimek")),
                                Username = sqlDataReader.GetString(sqlDataReader.GetOrdinal("UporabniskoIme")),
                            };
                            succeeded = true;
                        }
                        else
                        {
                            isLockedOut = true;
                        }
                    }
                }
                else
                {
                    //zato da ne takoj konca
                    Encryption.CompareByteArrays(Encryption.CreatePasswordHash(password).Hash, new byte[4] { 0, 1, 0, 1 });
                }
            });
            tbPassword.Password = "";

            if (!succeeded)
            {
                MessageBox.Show("Wrong login data!", "Login", MessageBoxButton.OK, MessageBoxImage.Stop);
                return;
            }

            App.User = user;
            this.Hide();
            var win = new WinMain();
            win.ShowDialog();
            this.Show();
            this.Close();
        }
    }
}