CLI.java

import java.util.Scanner;
import java.util.InputMismatchException;

/**
 * The Command Line Interface for the program aka Main.
 */
public final class CLI {
    /**
     * Calls the tank generation function and then real main.
     */
    public static void main(String[] args) {
        Board.generateTanks();
        CLI.runEndlessProgram();
    }

    /**
     * The real main flow of the program.
     */
    private static void runEndlessProgram() {
        /*
         * option 0 exits the program
         * game ends when all tanks are at health 0
         */
        while (CLI.isGameOver() == false) {
            CLI.displayProgram();
            CLI.askForOption();
            try {
                Thread.sleep(3000); // 3 secs
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
            CLI.printEmptyLines();
        }
    }

    /**
     * Determine if all tanks have a health level of 0.
     * 
     * @return true if all tanks are dead
     */
    private static boolean isGameOver() {
        for (int position = 1; position <= Board.MAX_AMOUNT_OF_TANKS; position++) {
            if (Board.getTankFromPosition(position).health != 0) {
                return false;
            } else {
                continue;
            }
        }
        // If this runs, game is over
        CLI.sayBye();
        return true;
    }

    /**
     * Shamelessly plug the program (xd).
     */
    private static void greetUser() {
        System.out.println();
        System.out.println("   panzer minigame");
        System.out.println("  by luis and wendy");
        System.out.println();
        System.out.println("   practice 2/2");
        System.out.println("    for st0242");
        System.out.println();
    }

    /**
     * Print the ending message (spoiler alert).
     */
    private static void sayBye() {
        System.out.println("game is over");
        System.out.println("i am not sad. are you sad?");
        System.out.println();
        System.out.println("this program does not make sense. it's just a project for uni.");
        System.out.println();

    }

    /**
     * A flow for printing the greeting/title, features, and board state.
     */
    private static void displayProgram() {
        CLI.greetUser();
        CLI.showFeatures();
        Board.displayBoardState();
    }

    /**
     * Prints the list of features.
     */
    private static void showFeatures() {
        System.out.println("  features");
        System.out.println();
        System.out.println("0 quit");
        System.out.println("1 shoot tank");
        System.out.println("2 atomic bomb");
        System.out.println("3 mutant tank");
        System.out.println("4 granny quote");
        System.out.println("5 bullets fired");
        System.out.println();
    }

    /**
     * Prompt the user for a number and then call the corresponding function.
     * It also prevents people from typing non integers.
     */
    private static void askForOption() {
        System.out.print("i'd like to do # ");
        try {
            int featureChosen = new Scanner(System.in).nextInt();
            callAction(featureChosen);
            if (featureChosen <= 3) {
                Board.displayBoardState();
            }
        } catch (InputMismatchException e) {
            System.out.println("General, that was not a number...");
        }
    }

    /**
     * Calls the corresponding function according to the feature.
     * 
     * @param option The number of the feature to call.
     */
    private static void callAction(int option) {
        System.out.println();
        if (option == 0)
            System.exit(2022);
        else if (option == 1)
            PlayerActions.shootBullet();
        else if (option == 2)
            PlayerActions.activateAtomicBomb();
        else if (option == 3)
            PlayerActions.activateMutantTank();
        else if (option == 4)
            PlayerActions.rememberGrannyWithAQuote();
        else if (option == 5)
            PlayerActions.displayFormattedBulletsFired();
        else
            System.out.println("General, you must choose a valid option number.");
        System.out.println();
    }

    /**
     * Add 4 new lines to separate, uhm, sessions?
     */
    private static void printEmptyLines() {
        System.out.println("\n\n\n\n");
    }
}