import java.util.*;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class GuessANumber{
	private Random rnd;
	private boolean isAnInt(String input){
		try{
			int output = Integer.parseInt(input);
			return true;
		}catch(Exception ex){
			return false;
		}
	}
	private int getNumericInput(String prompt){
		while(true){
			System.out.print(prompt + ": ");
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			try{
				String ans = br.readLine();
				if(isAnInt(ans)) return Integer.parseInt(ans);
				System.out.println("Your entry was not a number");
			}catch(Exception ex){
				
			}
		}
	}
	private String getInput(String question){
		while(true){
			System.out.println(question + "?");
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			try{
				String ans = br.readLine();
				if(ans != null && ans != "")return ans;
				System.out.println("Your entry seems empty.");
			}catch(Exception ex)
			{}
		}
	}
	private boolean askToPlayAgain(){
		while(true){
			String ans = getInput("Would you like to play again? (\"YES\" or \"NO\")");
			if(ans.equalsIgnoreCase("YES") || ans.equalsIgnoreCase("Y")) return true;
			if(ans.equalsIgnoreCase("NO") || ans.equalsIgnoreCase("N")) return false;
			System.out.println("Please respond with \"YES\" or \"NO\"");
		}
	}
	public void Run(){
		rnd = new Random();
		boolean running = true;
		boolean gotMaxNumber = false;
		int maxNumber = 0;
		int answer = 0;
		boolean gameOver = false;
		int tries = 0;
		System.out.println("*** GUESS A NUMBER : Java ***");
		while(running){
			while(!gotMaxNumber){
				maxNumber = getNumericInput("Please enter the maximum number you wish to use");
				if(maxNumber > 0){
					gotMaxNumber = true;
					answer = rnd.nextInt(maxNumber) + 1;
					gameOver = false;
					tries = 0;
					System.out.println("Ok, I am thinking of a number between 1 and " + Integer.toString(maxNumber));
				}
				else
					System.out.println("The maximum number should be greater than zero.");
			}
			int guess = getNumericInput("Guess a number between 1 and " + Integer.toString(maxNumber));
			tries++;
			if(guess > answer) System.out.println("Too high.");
			if(guess < answer) System.out.println("Too low.");
			if(guess == answer){
				if(tries == 0) System.out.println("You guessed it in 1 try!");
				else System.out.println("You guessed it in " + Integer.toString(tries) + " tries!");
				gameOver = true;
			}
			if(gameOver){
				running = askToPlayAgain();
				if(running) gotMaxNumber = false;
			}
		}
		System.out.println("Thanks for playing!");
		System.out.println("*** GAME OVER ***");
	}
	public static void main(String args[]){
		GuessANumber g = new GuessANumber();
		g.Run();
	}
}