// author: Lawrence Oluyede
// date: 18 Feb 2004
// license: throw away code
using System;
using System.Text;

public class Uptime
{
	public static int Main(string[] argv)
	{
		if(argv.Length == 0)
		{
			Console.WriteLine(getUptime());
			return 0;
		}
		else if(argv.Length == 1 && argv[0].ToLower() == "-v")
		{
			displayVersion();
			return 0;
		}
		
		Console.WriteLine("usage: uptime [-v]\n    -v    display version");
		return 1;
	}
	
	private static string getUptime()
	{
		StringBuilder buffer = new StringBuilder();
		
		int ticks = Environment.TickCount;
		
		// append the hour:minute:second
		buffer.Append(DateTime.Now.ToString("HH:MM:ss",
			System.Globalization.DateTimeFormatInfo.InvariantInfo));
		buffer.Append(" up");
		
		// compute and append the number of days
		int days = ticks / (1000 * 60 * 60 * 24);		
		if(days > 0)
		{
			buffer.AppendFormat(" {0} day{1}",
				days,
				days > 1 ? "s" : String.Empty);
		}
		
		// compute seconds, minutes and hours
		int seconds = ticks / 1000;
		int minutes = ticks / (1000 * 60);
		int hours = minutes / 60;
		
		hours = hours % 24;
		minutes = minutes % 60;
		seconds = seconds % 60;
		
		buffer.AppendFormat(" {0,2:D2}:{1,2:D2}:{2,2:D2}", hours, minutes, seconds);
		
		return buffer.ToString();
	}
	
	private static void displayVersion()
	{
		Console.WriteLine("uptime v0.1");
		Console.WriteLine("  written by Lawrence Oluyede");
	}
}