using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Generator
{
    public partial class Generator : Form
    {
        public Generator()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            timer1.Start();
            if ((progressBar1.Value == 100))
            {
             timer1.Stop();
             progressBar1.Value = 0;
             textBox1.Text = "";
             timer1.Start();
            }

        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            progressBar1.Increment(1);
            if ((progressBar1.Value == 100))
            {
                timer1.Stop();
                Random random = new Random();
                textBox1.Text = "" + (char)random.Next(65, 90) + (char)random.Next(65, 90) + (char)random.Next(65, 90) + random.Next(0, 9) + "-" + random.Next(0, 9) + (char)random.Next(65, 90) + (char)random.Next(65, 90) + random.Next(0, 9) + "-" + (char)random.Next(65, 90) + random.Next(0, 9) + (char)random.Next(65, 90) + random.Next(0, 9) + "-" + (char)random.Next(65, 90) + random.Next(0, 9) + (char)random.Next(65, 90) + random.Next(0, 9) + "-" + (char)random.Next(65, 90) + random.Next(0, 9) + (char)random.Next(65, 90) + random.Next(0, 9);
            }
        }

private static string RandomString()
        {
            var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ3454323LMNOPQRSTUVWXYZ001206789";
            var stringChars = new char[4];
            var random = new Random();

            for (int i = 0; i < stringChars.Length; i++)
            {
                stringChars[i] = chars[random.Next(chars.Length)];
            }

            var finalString = new String(stringChars);
            return finalString;
        }
        private static string RandomString2()
        {
            var chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
            var random = new Random();
            var result = new string(
                Enumerable.Repeat(chars, 4)
                          .Select(s => s[random.Next(s.Length)])
                          .ToArray());
            return result;
        }
        private static string RandomString3()
        {
            var chars = "ABWXYZ01234567IJKLMNOPQRSTUVWXYZ0123456789";
            var random = new Random();
            var result = new string(
                Enumerable.Repeat(chars, 4)
                          .Select(s => s[random.Next(s.Length)])
                          .ToArray());
            return result;
        }
        private static string RandomString4()
        {
            var chars = "ABWXYZ01234567IJKLMNOPQRSTUVWBWXYZ0120123456789";
            var random = new Random();
            var result = new string(
                Enumerable.Repeat(chars, 4)
                          .Select(s => s[random.Next(s.Length)])
                          .ToArray());
            return result;
        }
        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            textBox1.TextAlign = HorizontalAlignment.Center;
        }
    }
}