import java.util.*;
import java.io.*;

public class TimeTest {

	public static void main(String[] args) {

		printMenu();
		doMenu();
	}

	//----------------------------------------
	// prints the menu choices
	public static void printMenu() {
		System.out.println("Menu choices are:");
		System.out.println("q: quit the testing program");
		System.out.println("?: print this menu");
		System.out.println("+: add time to the current time span");
		System.out.println("p: print the current time span");
		System.out.println("r: reset the time span");
		System.out.println("s: set the time span");
		System.out.println();
	}

	//----------------------------------------
	// reads commands from the user and handles them
	public static void doMenu() {
		Scanner scan = new Scanner(System.in);
		TimeSpan t = new TimeSpan();

		String theCommand;
		try {
			System.out.print("\nEnter command: ");
			while (scan.hasNext()) {
				theCommand = scan.next();
				System.out.println();
				if (theCommand.length() > 0) {
					if (theCommand.length() == 1) {
						char command = theCommand.charAt(0);
						if (command == 'q') {
							throw new IOException();
						} else if (command == '?') {
							printMenu();
						} else if (command == '+') {
							addValue(scan, t);
						} else if (command == 'p') {
							System.out.println("Current Time Span: " + t);
						} else if (command == 'r') {
							t.reset();
						} else if (command == 's') {
							testSet(scan, t);
						}
					} else {
						System.out.println("Only one letter commands allowed. "
								+ "Your longer one was ignored.");
					}
					System.out.println("Enter command:");
				}
			}
		} catch (IllegalStateException e) {
			System.out.println(e.getMessage());
			System.out.println("Thank you for using TimeSpan.");
			return;
		} catch (IOException e) {
			System.out.println("Thank you for using TimeSpan.");
			return;
		}
	}

	//----------------------------------------
	// Get input to test the set operation
	public static void testSet(Scanner scan, TimeSpan t) {
		int hrs;
		int min;

		System.out.print("New hours: ");
		hrs = scan.nextInt();
		System.out.print("New minutes: ");
		min = scan.nextInt();
		t.set(hrs, min);
	}

	//----------------------------------------
	// Get input to test the add operation
	public static void addValue(Scanner scan, TimeSpan t) {
		int hrs;
		int min;

		System.out.print("Add hours: ");
		hrs = scan.nextInt();
		System.out.print("Add minutes: ");
		min = scan.nextInt();
		t.add(hrs, min);
	}

}