/**
 * Assignment 2, COMP268 Class: RandomSumGame.java
 *
 * @description Provides an implementation of a light weight version of the dice game, Craps.
 * @author: mo khan Student ID: 3431709
 * @date Jun 18, 2019
 * @version 1.0
 */
package Q4;

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

public class RandomSumGame {
  private boolean start = true;
  private int d1 = 0;
  private int d2 = 0;
  private int sum = 0;
  private int valuePoint = 0;
  private int wins = 0;
  private int losses = 0;
  private String status = "";
  private PrintStream out;

  /**
   * Creates an instance of the craps game.
   *
   * @param out the output stream to write messages to.
   */
  public RandomSumGame(PrintStream out) {
    this.out = out;
  }

  /**
   * Returns the total # of wins.
   *
   * @return the total # of wins
   */
  public int getWins() {
    return this.wins;
  }

  /**
   * Returns the total # of losses
   *
   * @return the total # of losses
   */
  public int getLosses() {
    return this.losses;
  }

  /** Plays a roll of the dice. This method will also roll the dice. */
  public void play() {
    this.rollDice();
    this.play(this.d1, this.d2);
  }

  /**
   * Plays a roll of the given dice. This is a method overload of the previous play method.
   *
   * @param d1 the value of the roll for the first dice
   * @param d2 the value of the roll for the second dice
   */
  public void play(int d1, int d2) {
    int total = d1 + d2;
    this.puts("You rolled: %d", total);
    if (hasValuePoint()) this.subsequentPlay(total);
    else this.firstPlay(total);
  }

  /** This method rolls each of the dice. */
  public void rollDice() {
    this.d1 = this.roll();
    this.d2 = this.roll();
    this.sum = this.d1 + this.d2;
  }

  private int roll() {
    return new Random().nextInt(5) + 1;
  }

  private void firstPlay(int total) {
    switch (total) {
      case 2:
      case 3:
      case 12:
        this.lose("Craps! You lose.");
        break;
      case 7:
      case 11:
        this.win("Natural! You win!");
        break;
      default:
        this.puts("Value point established: %d", total);
        this.valuePoint = total;
        play();
        break;
    }
  }

  private void subsequentPlay(int total) {
    if (total == this.valuePoint) this.win("You win!");
    else if (total == 7) this.lose("You lose.");
    else play();
  }

  private void win(String message) {
    this.wins += 1;
    this.puts(message);
    this.reset();
  }

  private void lose(String message) {
    this.losses += 1;
    this.puts(message);
    this.reset();
  }

  private void puts(String format, Object... args) {
    this.out.println(String.format(format, args));
  }

  private boolean hasValuePoint() {
    return this.valuePoint > 0;
  }

  private void reset() {
    this.valuePoint = this.d1 = this.d2 = this.sum = 0;
  }

  /**
   * The entry point to the console application.
   *
   * @params args the command line arguments passed to the program
   */
  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    System.out.println("Welcome to Craps");
    System.out.println("================");
    RandomSumGame game = new RandomSumGame(System.out);

    for (int i = 0; i < 3; i++) {
      System.out.println();
      System.out.println(String.format("Game %d", i + 1));
      game.play();
    }

    System.out.println();
    System.out.println("================");
    System.out.println(String.format("Wins: %d", game.getWins()));
    System.out.println(String.format("Losses: %d", game.getLosses()));
    System.out.println();
  }
}