using SaugumasPirmasPD.DbContextApp;
using SaugumasPirmasPD.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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;

namespace SaugumasPirmasPD
{

    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

        }
         string keyword = "AYUSH";

        public string generateKey(string str, string key)
        {
            int x = str.Length;

            for (int i = 0; ; i++)
            {
                if (x == i)
                    i = 0;
                if (key.Length == str.Length)
                    break;
                key += (key[i]);
            }
            return key;
        }
        static string cipherText(string str, string key)
        {
            string cipher_text = "";

            for (int i = 0; i < str.Length; i++)
            {

                int x = (str[i] + key[i]) % 26;

                x += 'A';

                cipher_text += (char)(x);
            }
            return cipher_text;
        }


        static String originalText(String cipher_text, String key)
        {
            String orig_text = "";

            for (int i = 0; i < cipher_text.Length &&
                                    i < key.Length; i++)
            {
                // converting in range 0-25
                int x = (cipher_text[i] -
                            key[i] + 26) % 26;

                // convert into alphabets(ASCII)
                x += 'A';
                orig_text += (char)(x);
            }
            return orig_text;
        }
        private void Crypt_Click(object sender, RoutedEventArgs e)
        {
            string str = Pass.Text;
            string str1=str.ToUpper();
            string key = generateKey(str1, keyword);
            string smth = cipherText(str1, key);
            using (var db = new AppDbContext())
            {
                var user = new User { Name = Name.Text, CipherPassword = smth, OriginalPassword= key };
                db.User.Add(user);
                db.SaveChanges();
            }

        }

        private void List_Click(object sender, RoutedEventArgs e)
        {
            DataBox.Items.Clear();
            List<User> users = new List<User>();
            using (var db = new AppDbContext())
            {
                var query = from b in db.User
                            orderby b.Name
                            select b;
                foreach(var item in query)
                {
                    DataBox.Items.Add(string.Format("{0} | {1}", item.Name, item.CipherPassword));
                }

            }
        }

        private void RealPassword_Click(object sender, RoutedEventArgs e)
        {
            string key = "";
            string selected = DataBox.SelectedItem.ToString();
            string[] cipher = selected.Split(" | ");
            foreach(var pass in cipher)
            {
                Cyphered.Text = pass.ToUpper();
            }
            using (var db = new AppDbContext())
            {
                foreach(var password in db.User)
                {
                    if(password.CipherPassword== Cyphered.Text)
                    {

                        Real.Text = originalText(Cyphered.Text, password.OriginalPassword.ToString());
                    }
                }
            }

        }
    }
}