09_performancetask

import java.util.Scanner;

public class name_randomizer {

    /*
        1, 2
        1, 3
        2, 1
        2, 3
        3, 1
        3, 2

        There are 6 possible combinations.
    */

    private static int[][] nameRandomizer = {
        {1, 2},
        {1, 3},
        {2, 1},
        {2, 3},
        {3, 1},
        {3, 2}
    };

    private static int nameRandomizerMAX = 6;
    private static int nameRandomizerVAL = 0;
    private static String name01 = "null";
    private static String name02 = "null";
    private static String name03 = "null";


    private static String name_result01;
    private static String name_result02;
    private static String name_result03;
    private static String name_result04;
    private static String name_result05;
    private static String name_result06;

    private static String name_result01LOWERCASE;
    private static String name_result02LOWERCASE;
    private static String name_result03LOWERCASE;
    private static String name_result04LOWERCASE;
    private static String name_result05LOWERCASE;
    private static String name_result06LOWERCASE;

    private static String name_result01ABBR;
    private static String name_result02ABBR;
    private static String name_result03ABBR;
    private static String name_result04ABBR;
    private static String name_result05ABBR;
    private static String name_result06ABBR;

    public static void generator_name() {

        switch (nameRandomizerVAL) {
            case 1:
                System.out.print(name01);
                break;
            case 2:
                System.out.print(name02);
                break;
            case 3:
                System.out.print(name03);
                break;
            default:
                System.out.println("Error generator_name(): No valid switch case");

        }


    }

    public static void array_cycle() {
        for (int a = 0; a < nameRandomizerMAX; a++) {

            switch (a) {
                case 0:
                    name_result01 = name01.concat(" " + name02);
                    name_result01ABBR = String.valueOf(name01.charAt(0))+String.valueOf(name02.charAt(0));
                    name_result01LOWERCASE = name_result01.toLowerCase();
                    name_result01LOWERCASE = name_result01LOWERCASE.replace(' ', '_');
                    break;
                case 1:
                    name_result02 = name01.concat(" " + name03);
                    name_result02ABBR = String.valueOf(name01.charAt(0))+String.valueOf(name03.charAt(0));
                    name_result02LOWERCASE = name_result02.toLowerCase();
                    name_result02LOWERCASE = name_result02LOWERCASE.replace(' ', '_');
                    break;
                case 2:
                    name_result03 = name02.concat(" " + name01);
                    name_result03ABBR = String.valueOf(name02.charAt(0))+String.valueOf(name01.charAt(0));
                    name_result03LOWERCASE = name_result03.toLowerCase();
                    name_result03LOWERCASE = name_result03LOWERCASE.replace(' ', '_');
                    break;
                case 3:
                    name_result04 = name02.concat(" " + name03);
                    name_result04ABBR = String.valueOf(name02.charAt(0))+String.valueOf(name03.charAt(0));
                    name_result04LOWERCASE = name_result04.toLowerCase();
                    name_result04LOWERCASE = name_result04LOWERCASE.replace(' ', '_');
                    break;
                case 4:
                    name_result05 = name03.concat(" " + name01);
                    name_result05ABBR = String.valueOf(name03.charAt(0))+String.valueOf(name01.charAt(0));
                    name_result05LOWERCASE = name_result05.toLowerCase();
                    name_result05LOWERCASE = name_result05LOWERCASE.replace(' ', '_');
                    break;
                case 5:
                    name_result06 = name03.concat(" " + name02);
                    name_result06ABBR = String.valueOf(name03.charAt(0))+String.valueOf(name02.charAt(0));
                    name_result06LOWERCASE = name_result06.toLowerCase();
                    name_result06LOWERCASE = name_result06LOWERCASE.replace(' ', '_');
                    break;
            }
            for (int b = 0; b < 2; b++) {
                nameRandomizerVAL = nameRandomizer[a][b];
                if (b == 0) {
                    System.out.print(a+1 + ". ");
                }

                generator_name();

                if (b == 1) {
                    System.out.println("");
                } else if (b == 0) {
                    System.out.print(" ");
                }
            }
        }
    }

    public static void check_string(String check) {

        if (check.trim().isEmpty() == true) {
            System.out.println("Error check_string: String is empty.");
            System.exit(1);
        }
    }

    public static void printName (String name01, String name02, String name03) { //debug method, ignore.

        System.out.println(name01);
        System.out.println(name02);
        System.out.println(name03);

    }

    public static void main(String[] args) {
        // Declare variables
        Scanner input_name = new Scanner(System.in);
        int max_names = 3;
        int optionNameChosen = 0;

        System.out.println("<======== Name generator ========>");
        System.out.println("Enter first three names: ");

        for (int i = 1; i <= max_names; i++) {
            System.out.print(i + ": ");
            if (input_name.hasNextLine()) {
                switch (i) {
                    case 1:
                        name01 = input_name.nextLine();
                        check_string(name01);
                        break;
                    case 2:
                        name02 = input_name.nextLine();
                        check_string(name02);
                        break;
                    case 3:
                        name03 = input_name.nextLine();
                        check_string(name03);
                        break;
                    default:
                        System.out.println("Error main: Switch iniator does not exist.");
                }
            } else {
                System.out.println("Error main: Scanner has no line.");
            }
        }

        System.out.println("========");

        // Cycle through possibe combinations
        array_cycle();

        // Ask the user which option

        Scanner optionName = new Scanner(System.in);
        System.out.println("Which name combination would you like?");
        System.out.print("Enter a value from 1 to " + nameRandomizerMAX + ": ");

        if (optionName.hasNextInt()) {
            optionNameChosen = optionName.nextInt();
        } else {
            System.out.println("Error main: Input must be an integer within values 1 - " + nameRandomizerMAX);
            System.exit(1);
        }

        if (optionNameChosen < 0 || optionNameChosen > nameRandomizerMAX) {
            System.out.println("Error main: Input must be an integer within values 1 - " + nameRandomizerMAX);
            System.exit(1);
        }

        switch (optionNameChosen) {
            case 1:
                System.out.println("The initials for " + name_result01 + " is: " + name_result01ABBR );
                System.out.println("Suggested username: " + name_result01LOWERCASE);
                break;
            case 2:
                System.out.println("The initials for " + name_result02 + " is: " + name_result02ABBR );
                System.out.println("Suggested username: " + name_result02LOWERCASE);
                break;
            case 3:
                System.out.println("The initials for " + name_result03 + " is: " + name_result03ABBR );
                System.out.println("Suggested username: " + name_result03LOWERCASE);
                break;
            case 4:
                System.out.println("The initials for " + name_result04 + " is: " + name_result04ABBR );
                System.out.println("Suggested username: " + name_result04LOWERCASE);
                break;
            case 5:
                System.out.println("The initials for " + name_result05 + " is: " + name_result05ABBR );
                System.out.println("Suggested username: " + name_result05LOWERCASE);
                break;
            case 6:
                System.out.println("The initials for " + name_result06 + " is: " + name_result06ABBR );
                System.out.println("Suggested username: " + name_result06LOWERCASE);
                break;
            default:
                System.out.println("Error main: Invalid case");
        }


        input_name.close();
        optionName.close();



    }
}