NavyBattle

package Advance.Exams.JavaAdvancedExam.December2022;

import java.util.Scanner;

public class NavyBattle {

    private static final char SUBMARINE = 'S';
    private static final char BOMB = '*';
    private static final char CRUISER = 'C';
    private static final char EMPTY_SPOT = '-';
    private static int submarineLives = 3;
    private static int cruisers = 3;
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);


        int size = Integer.parseInt(scanner.nextLine());
        char[][] battlefield = new char[size][size];
        fullFillBattlefield(scanner, battlefield);


        int[] currentPosition = getCurrentPosition(battlefield);
        while (submarineLives > 0 && cruisers > 0) {
            String command = scanner.nextLine();
            int row = currentPosition[0];
            int col = currentPosition[1];

            switch (command) {
                case "right":
                    if (battlefield[row][col + 1] == BOMB) {
                        submarineLives--;

                    } else if (battlefield[row][col + 1] == CRUISER) {
                        cruisers--;
                    }
                    currentPosition[1] = col + 1;
                    battlefield[row][col] = EMPTY_SPOT;
                    battlefield[row][col + 1] = SUBMARINE;
                    break;
                case "down":
                    if (battlefield[row + 1][col] == BOMB) {
                        submarineLives--;

                    } else if (battlefield[row + 1][col] == CRUISER) {
                        cruisers--;
                    }
                    currentPosition[0] = row + 1;
                    battlefield[row][col] = EMPTY_SPOT;
                    battlefield[row + 1][col] = SUBMARINE;
                    break;
                case "left":
                    if (battlefield[row][col - 1] == BOMB) {
                        submarineLives--;

                    } else if (battlefield[row][col - 1] == CRUISER) {
                        cruisers--;
                    }
                    currentPosition[1] = col - 1;
                    battlefield[row][col] = EMPTY_SPOT;
                    battlefield[row][col - 1] = SUBMARINE;
                    break;
                case "up":
                    if (battlefield[row - 1][col] == BOMB) {
                        submarineLives--;

                    } else if (battlefield[row - 1][col] == CRUISER) {
                        cruisers--;
                    }
                    currentPosition[0] = row - 1;
                    battlefield[row][col] = EMPTY_SPOT;
                    battlefield[row - 1][col] = SUBMARINE;
                    break;
            }
        }

        if (submarineLives < 1) {
            System.out.printf("Mission failed, U-9 disappeared! Last known coordinates [%d, %d]!\n", currentPosition[0], currentPosition[1]);
        } else  {
            System.out.println("Mission accomplished, U-9 has destroyed all battle cruisers of the enemy!");
        }
        printBattlefield(battlefield);
    }

    private static void fullFillBattlefield(Scanner scanner, char[][] battlefield) {
        for (int i = 0; i < battlefield.length; i++) {
            String currentInput = scanner.nextLine();
            for (int j = 0; j < currentInput.length(); j++) {
                battlefield[i][j] = currentInput.charAt(j);
            }
        }
    }

    private static void printBattlefield(char[][] battlefield) {
        for (int row = 0; row < battlefield.length; row++) {
            for (int col = 0; col < battlefield.length; col++) {
                System.out.print(battlefield[row][col]);
            }
            System.out.println();
        }
    }

    private static int[] getCurrentPosition(char[][] battlefield) {
        int[] position = new int[2];
        for (int row = 0; row < battlefield.length; row++) {
            for (int col = 0; col < battlefield[row].length; col++) {
                if (battlefield[row][col] == 'S') {
                   return position = new int[] {row, col};
                }
            }
        }
        return position;
    }
}