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

namespace Backdoor
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.TextBox edOut;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.edOut = new System.Windows.Forms.TextBox();
			this.SuspendLayout();
			// 
			// edOut
			// 
			this.edOut.Dock = System.Windows.Forms.DockStyle.Fill;
			this.edOut.Location = new System.Drawing.Point(0, 0);
			this.edOut.Multiline = true;
			this.edOut.Name = "edOut";
			this.edOut.Size = new System.Drawing.Size(456, 293);
			this.edOut.TabIndex = 0;
			this.edOut.Text = "";
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(456, 293);
			this.Controls.Add(this.edOut);
			this.Name = "Form1";
			this.Text = "AyaNova BackDoor login ";
			this.Load += new System.EventHandler(this.Form1_Load);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void Form1_Load(object sender, System.EventArgs e)
		{
			
			edOut.AppendText("Today's login:\r\n");
			edOut.AppendText(Generate(System.DateTime.Today,new Random(unchecked((int)DateTime.Now.Ticks))));
			edOut.AppendText("\r\nTomorrow's login:\r\n");
			edOut.AppendText(Generate(System.DateTime.Today.AddDays(1),new Random(~unchecked((int)DateTime.Now.Ticks))));


		}

		private string Generate(System.DateTime dtWhen, Random r)
		{
			int nDummyCharFactor=4;
			int ndwf=0;
			StringBuilder sb = new StringBuilder();
			string sLogin="";
			string sPassword="";
			switch(dtWhen.DayOfWeek)
			{
				case System.DayOfWeek.Monday:
					ndwf=12;
					break;
				case System.DayOfWeek.Tuesday:
					ndwf=49;
					break;
				case System.DayOfWeek.Wednesday:
					ndwf=23;
					break;
				case System.DayOfWeek.Thursday:
					ndwf=65;
					break;
				case System.DayOfWeek.Friday:
					ndwf=87;
					break;
				case System.DayOfWeek.Sunday:
					ndwf=99;
					break;
				case System.DayOfWeek.Saturday:
					ndwf=72;
					break;

			}
			int nLogin=dtWhen.DayOfYear+ndwf*ndwf;
			int nPassword=(dtWhen.Year+dtWhen.Month+ndwf)*(ndwf+2);

			
			char dummy=' ';
			foreach(char c in nLogin.ToString())
			{		
				int nDummycharcount=r.Next(nDummyCharFactor)+1;
				for(int x=0;x<nDummycharcount;x++)
				{
					dummy=(char)(r.Next(26)+65);
					sLogin+=dummy;
					

				}
				sLogin+=c;
			}
			sb.Append("Login:[");
			sb.Append(sLogin);
			sb.Append("]\r\n");


			//Do password
			
			foreach(char c in nPassword.ToString())
			{		
				int nDummycharcount=r.Next(nDummyCharFactor)+1;
				for(int x=0;x<nDummycharcount;x++)
				{
					dummy=(char)(r.Next(26)+65);
					sPassword+=dummy;
					

				}
				sPassword+=c;
			}
			sb.Append("Password:[");
			sb.Append(sPassword);
			sb.Append("]\r\n");

			return sb.ToString();
		}
	}
}