import java.util.Scanner;

public class Aufgabe3 {

	/**
	 * @author S1010237024
	 */

	private static void printTime(long Time) {
		long hour = (Time % 86400000) / 3600000;
		long min = (Time % 3600000) / 60000;
		long sec = (Time % 60000) / 600;

		System.out.format("%02d:%02d:%02d", hour, min, sec);
		Out.println();

	}// printTime

	public static void main(String[] args) {

		String userCommand = "";
		long curTime = 0;
		long secTime = 0;
		long partTime = 0;
		long totalTime = 0;
		Scanner readCommand = new Scanner(System.in);
		boolean bRestart = true;
		boolean bStarted = false;

		Out.println("Enter: start/stop/reset/exit:");
		Out.println("Other commands will be ignored");

		do {
			userCommand = readCommand.next();

			if (userCommand.equalsIgnoreCase("start") && bStarted == false) {
				curTime = System.currentTimeMillis();
				Out.println("Task started.");
				bStarted = true;
			}// if start

			else if (userCommand.equalsIgnoreCase("start") && bStarted == true) {
				Out.println("Can't start. Task already running.");
			}// if start while started

			if (userCommand.equalsIgnoreCase("stop") && bStarted == true) {
				secTime = System.currentTimeMillis();
				Out.println("Task stopped.");

				partTime = (secTime - curTime);
				Out.print("Time on task: ");
				printTime(partTime);

				totalTime = totalTime + partTime;
				Out.print("Total time on task: ");
				printTime(totalTime);// calculate the total time in ms. Method
										// printTime to format

				bStarted = false;
			}// if stop

			else if (userCommand.equalsIgnoreCase("stop") && bStarted == false) {
				Out.println("Can't stop. No task running");
			}// if stop while stopped

			if (userCommand.equalsIgnoreCase("reset") && bStarted == false) {
				Out.println("Task resetted.");
				partTime = 0;
				totalTime = 0;
				curTime = 0;
				secTime = 0;
			}// if reset
			if (userCommand.equalsIgnoreCase("reset") && bStarted == true) {
				Out.println("Reset not possible. Task running.");
			}// if reset while task started

			if (userCommand.equalsIgnoreCase("exit")) {
				Out.println("System exit");
				Out.print("Time on task: ");
				printTime(partTime);
				Out.print("Total time on task: ");
				printTime(totalTime);
				System.exit(0);
				bRestart = false;
			}// if exit

		} while (bRestart == true);

	}// main

}// Aufgabe3