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

public class Pig2 {

    // returns true if the user wants to roll
    public static boolean askHuman() {
        Scanner in = new Scanner(System.in);
        int number = 0;

        while (number != 1 && number != 2) {
            System.out.println("Would you like to roll again?");
            System.out.println("1. Yes");
            System.out.println("2. No");
            System.out.print(": ");
            number = in.nextInt();
        }

        return number == 1;
    }

    // return true for rolling, false for stay
    public static boolean askComputer(int playerScore, int computerScore, int roundPoints, int rolls) {
        // if we have done less than three rolls, for sure roll
        if (rolls < 4) {
            return true;
        }

        int difference = computerScore - playerScore;

        // if we are now ahead, stop rolling
        if (difference + roundPoints > 0) {
            return false;
        }

        // at this point, flip a coin and decide based off that
        Random rng = new Random();
        int num = rng.nextInt(1, 3);
        if (num == 1) {
            return true;
        } else {
            return false;
        }
    }

    public static int dieRoll() {
        Random rng = new Random();
        return rng.nextInt(1, 7);
    }

    public static int turn(int playerScore, int computerScore, boolean humanPlayer) {
        boolean rolling = true;
        int roundPoints = 0;
        int rolls = 0;

        while (rolling) {
            int roll = dieRoll();
            rolls++;
            System.out.println("The roll is " + roll + ".");

            roundPoints += roll;
            if (roll == 1) {
                roundPoints = 0;
                rolling = false;
                if (humanPlayer) {
                    System.out.println("Sorry you busted!");
                } else {
                    System.out.println("The computer busted");
                }
            } else {
                if (humanPlayer) {
                    System.out.println("So far this round you have " + roundPoints + " points.");
                    rolling = askHuman();
                } else {
                    System.out.println("Computer has " + roundPoints + " points so far this round.");
                    rolling = askComputer(playerScore, computerScore, roundPoints, rolls);

                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        // ignore
                    }
                }
            }
        }

        if (humanPlayer) {
            System.out.println("You finish this round with " + roundPoints + " points.");
        } else {
            System.out.println("Computer finishes this round with " + roundPoints + " points.");
        }
        return roundPoints;
    }

    public static void game() {
        int playerScore = 0;
        int computerScore = 0;
        boolean playerTurn;

        // pick first player randomly
        Random rng = new Random();
        if (rng.nextInt(1, 3) == 1) {
            playerTurn = true;
        } else {
            playerTurn = false;
        }

        while (playerScore < 100 && computerScore < 100) {
            System.out.println("Player has " + playerScore + " points.");
            System.out.println("Computer has " + computerScore + " points.");

            if (playerTurn) {
                System.out.println("It is your turn.");
            } else {
                System.out.println("It is the computer turn.");
            }

            // do the turn
            int points = turn(playerScore, computerScore, playerTurn);

            // add in points
            if (playerTurn) {
                playerScore += points;
            } else {
                computerScore += points;
            }

            // switch turns
            playerTurn = !playerTurn;
            System.out.println();
        }

        // check who won
        if (playerScore >= 100) {
            System.out.println("Congratulations! You won with " + playerScore + " points!");
        } else {
            System.out.println("Sorry, the computer won wit " + computerScore + " points :(");
        }
    }

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