package Bagels;
import java.util.*;
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Bagels {
	private Random rnd = new Random();
	private Boolean Running = true;
	private Boolean GameOver = false;
	private Integer[] Digits = {0,0,0};

	public static void main(String[] args) {
		Bagels game = new Bagels();
		game.run();
	}

	public void run() {
		System.out.print("*** BAGELS : JAVA ***");
		Integer guess;
		Integer attempt;
		Integer score = 0;
		Running = true;
		if(askToSeeTheRules())displayRules();
		while(Running) {
			GameOver = false;
			attempt = 1;
			createTheNumber();
			System.out.println("OK, I HAVE A NUMBER IN MIND.");
			while(!GameOver) {
				guess = askForGuess(attempt);
				if(checkGuess(guess)) {
					System.out.println("YOU GOT IT!!!");
					score++;
					GameOver = true;
				} else {
					attempt++;
					if(attempt > 20) {
						displayGameOver();
						GameOver = true;
					}
				}
			}
		System.out.println("*** GAME OVER ***");
		Running = askToPlayAgain();
		}
		System.out.println("A " + score + " POINT BAGELS BUFF!");
		System.out.println("HOPE YOU HAD FUN. BYE!");
	}
	
	private int askForGuess(Integer attempt) {
		int ans = getIntInput("GUESS #" + attempt);
		while(true) {
			if(ans < 0) {
				System.out.println("PLEASE GUESS A NON-NEGATIVE NUMBER.");
			} else if(ans < 100 || ans > 999) {
				System.out.println("PLEASE GUESS A NUMBER BETWEEN 100 AND 999.");
			} else {
				return ans;
			}
		}
	}
	
	private void displayRules() {
		System.out.println("I WILL THINK OF A THREE-DIGIT NUMBER. YOU WILL TRY TO");
		System.out.println("GUESS MY NUMBER AND I WILL GIVE YOU CLUES AS FOLLOWS:");
		System.out.println("  PICO   - ONE DIGIT CORRECT BUT IN THE WRONG POSITION");
		System.out.println("  FERMI  - ONE DIGIT CORRECT AND IN THE RIGHT POSITION");
		System.out.println("  BAGELS - NO DIGITS ARE CORRECT");
		System.out.println();
		System.out.println("YOU GET TWENTY TRIES BEFORE YOU LOSE.");
		System.out.println();
	}
	
	private void displayGameOver() {
		int number = makeIntFromArray(Digits);
		System.out.println("OH WELL, THAT'S TWENTY GUESSES.");
		System.out.println("MY NUMBER WAS " + number + ".");
	}
	
	private Integer makeIntFromArray(Integer[] arrayIn) {
		return (arrayIn[0] * 100) + (arrayIn[1] * 10) + arrayIn[2];
	}
	
	private Integer[] makeArrayFromInt(Integer valIn) {
		Integer[] retArray = {0,0,0};
		retArray[0] = valIn / 100;
		retArray[1] = (valIn - (retArray[0] * 100)) / 10;
		retArray[2] = (valIn - (retArray[0] * 100) - (retArray[1]) * 10);
		return retArray;
	}
	
	private void createTheNumber()
	{
		Boolean gotNum = false;
		Digits[0] = generateRandomNumber(1, 10 , false);
		while(!gotNum) {
			Digits[1] = generateRandomNumber(0, 10, false);
			gotNum = (Digits[1] != Digits[0]);
		}
		gotNum = false;
		while(!gotNum) {
			Digits[2] = generateRandomNumber(0, 10, false);
			gotNum = (Digits[2] != Digits[0] && Digits[2] != Digits[1]);
		}
	}
	
	private Boolean checkGuess(Integer guess) {
		Integer[] temp = makeArrayFromInt(guess);
		Integer[] vals = {0,0,0};
		if(temp[0] == Digits[0]) vals[0] = 1;
		if(temp[1] == Digits[1]) vals[1] = 1;
		if(temp[2] == Digits[2]) vals[2] = 1;
		if(makeIntFromArray(vals) == 111) return true;
		if(vals[0] == 0) {
			if(temp[0] == Digits[1] || temp[0] == Digits[2])vals[0] = 2;
		}
		if(vals[1] == 0) {
			if(temp[1] == Digits[0] || temp[1] == Digits[2])vals[1] = 2;
		}
		if(vals[2] == 0) {
			if(temp[2] == Digits[0] || temp[2] == Digits[1])vals[2] = 2;
		}
		if(makeIntFromArray(vals) == 0) System.out.println("BAGELS");
		else {
			if(vals[0] == 1)System.out.print("FERMI ");
			else if(vals[0] == 2)System.out.print("PICO ");
			if(vals[1] == 1)System.out.print("FERMI ");
			else if(vals[1] == 2)System.out.print("PICO ");
			if(vals[2] == 1)System.out.println("FERMI");
			else if(vals[2] == 2)System.out.println("PICO");
		}
		return false;
	}

	// --- COMMON LIBRARY --- //
	private Integer generateRandomNumber(Integer minimum, Integer maximum, Boolean show) {
		Integer value = rnd.nextInt(maximum)+minimum;
		if(show)System.out.println(value);
		return value;
	}

	private Boolean isAnInt(String input) {
		try {
			Integer.parseInt(input);
			return true;
		}catch(Exception ex) {
			return false;
		}
	}
	
	private String askAQuestion(String prompt) {
		while(true) {
			System.out.print(prompt + "?");
			BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
			try {
				String ans = br.readLine();
				if(ans == null || ans == "") {
					System.out.println("PLEASE ANSWER THE QUESTION.");
				} else {
					return ans.toUpperCase();
				}
				
			}catch(Exception ex) {
				
			}
		}
	}
	private Integer getIntInput(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);
				}else {
					System.out.println("YOU DID NOT ENTER AN INTEGER.");
				}
			}catch(Exception ex) {
				
			}
		}
	}

	private Boolean askToPlayAgain()
	{
		while(true) {
			String ans = askAQuestion("DO YOU WANT TO PLAY AGAIN");
			if(ans.equalsIgnoreCase("YES") || ans.equalsIgnoreCase("Y")) return true;
			if(ans.equalsIgnoreCase("NO") || ans.equalsIgnoreCase("N")) return false;
			System.out.println("PLEASE ANSWER \"YES\" OR \"NO\"");
		}
	}
	
	private Boolean askToSeeTheRules()
	{
		while(true) {
			String ans = askAQuestion("DO YOU WANT TO SEE THE RULES");
			if(ans.equalsIgnoreCase("YES") || ans.equalsIgnoreCase("Y")) return true;
			if(ans.equalsIgnoreCase("NO") || ans.equalsIgnoreCase("N")) return false;
			System.out.println("PLEASE ANSWER \"YES\" OR \"NO\"");
		}
	}
	
}