import java.util.Random;
import java.util.Scanner;

public class Pig {

    public static int dieRoll() {
        Random rng = new Random();
        pause();
        return rng.nextInt(6) + 1;
    }

    public static void pause() {
        try {
            Thread.sleep(500);
        } catch (InterruptedException e) {
            System.out.println("Got interrupted!");
        }
    }

    public static boolean aiKeepRolling(int userScore, int aiScore, int roundScore) {
        int goal = 10;

        if (100 - aiScore < 10) {
            goal = 100 - aiScore;
        }

        // if losing by at least 15
        if (userScore - aiScore >= 15) {
            goal = 15;
        }


        if (roundScore >= goal) {
            return false;
        } else {
            return true;
        }
    }

    public static boolean userKeepRolling(int userScore, int aiScore, int roundScore) {
        Scanner in = new Scanner(System.in);

        // print the state so they can decide
        System.out.println("You have " + userScore + " points and the computer has " + aiScore + " points.");
        System.out.println("You have " + roundScore + " points so far in this round.");

        System.out.print("Do you want to keep rolling (y/n)? ");
        String answer = in.next();

        if (answer.equalsIgnoreCase("y")) {
            return true;
        } else if (answer.equalsIgnoreCase("n")) {
            return false;
        } else {
            return userKeepRolling(userScore, aiScore, roundScore);
        }
    }

    // run one round of the game, and return points gotten for the round
    public static int round(boolean userTurn, int userScore, int aiScore) {
        int roundScore = 0;

        if (userTurn) {
            System.out.println("\nIt is your turn");
        } else {
            System.out.println("\nIt is the computer's turn");
        }


        boolean keepRolling = true;
        while (keepRolling) {

            int roll = dieRoll();
            System.out.println((userTurn ? "You" : "The computer") + " rolled a " + roll);

            if (roll == 1) {
                System.out.println((userTurn ? "You" : "The computer") + " busted!");
                return 0;
            } else {
                roundScore += roll;
            }

            if (userTurn) {
                keepRolling = userKeepRolling(userScore, aiScore, roundScore);
            } else {
                keepRolling = aiKeepRolling(userScore, aiScore, roundScore);
            }
        }

        System.out.println((userTurn ? "You" : "The computer") + " receive " + roundScore + " points this round.");
        return roundScore;
    }

    public static void game() {
        int userScore = 0;
        int aiScore = 0;

        boolean userTurn = true;

        while (userScore < 100 && aiScore < 100) {
            int roundScore = round(userTurn, userScore, aiScore);

            if (userTurn) {
                userScore += roundScore;
            } else {
                aiScore += roundScore;
            }

            userTurn = !userTurn;
        }

        if (userScore >= 100) {
            System.out.println("Congratulations!  You have won!!");
        } else {
            System.out.println("Aww you have lost :(");
        }
    }


    public static void main(String args[]) {
        game();
    }
}