// =================================================================================================================================
import java.util.Scanner;
import java.util.Random;
// =================================================================================================================================



// =================================================================================================================================
public class Minesweeper {
// =================================================================================================================================



    // =============================================================================================================================
    public static Scanner keyboard = new Scanner(System.in);

    public static final int REVEAL = 1;
    public static final int FLAG   = 2;
    // =============================================================================================================================

    

    // =============================================================================================================================
    public static void main (String[] args) {

	if (args.length != 2) {
	    showUsageAndExit();
	}

	int numMines = 0;
	int sideSize = 0;
	try {
	    numMines = Integer.parseInt(args[0]);
	    sideSize = Integer.parseInt(args[1]);
	} catch (NumberFormatException e) {
	    showUsageAndExit();
	}

	if ((numMines <= 0) || (sideSize <= 0)) {
	    showUsageAndExit();
	}

	Cell[][] mines = populate(sideSize, numMines);
	play(mines);
	
    } // main ()
    // =============================================================================================================================



    // =============================================================================================================================
    public static void showUsageAndExit () {

	System.err.println("USAGE: java Minesweeper <number of mines> <grid size on each side>");
	System.exit(1);
	
    } // showUsageAndExit
    // =============================================================================================================================



    // =============================================================================================================================
    public static Cell[][] populate (int sideSize, int numMines) {

	// SET UP THE GRID.
	
    } // populate ()
    // =============================================================================================================================


    
    // =============================================================================================================================
    public static void play (Cell[][] mines) {

	// PLAY THE GAME.
	
    } // play ()
    // =============================================================================================================================



    // =============================================================================================================================
    public static void showGrid (Cell[][] mines) {

	System.out.println();

	// Show the column numbers
	System.out.print("\t");
	for (int col = 0; col < mines[0].length; col = col + 1) {
	    System.out.print("\t" + col);
	}
	System.out.println();
	System.out.print("\t");
	for (int col = 0; col < mines[0].length; col = col + 1) {
	    System.out.print("--------");
	}
	System.out.println();

	// Show the grid...
	for (int row = 0; row < mines.length; row = row + 1) {

	    // ...with leading row numbers.
	    System.out.print(row + "\t|\t");
	    for (int col = 0; col < mines[row].length; col = col + 1) {
		System.out.print(mines[row][col].toString() + '\t');
	    }
	    System.out.println();
	}

	System.out.println();

    } // showGrid ()
    // =============================================================================================================================



    // =============================================================================================================================
    public static int[] getCommand (int gridSize) {

	System.out.print("Enter a move (H for help): ");
	String[] entry = keyboard.nextLine().toUpperCase().split("\\s+");

	if (entry.length != 3 || entry[0].length() != 1) {
	    printMenu();
	    return getCommand(gridSize);
	}

	int op = -1;
	if (entry[0].charAt(0) == 'R') {
	    op = REVEAL;
	} else if (entry[0].charAt(0) == 'F') {
	    op = FLAG;
	} else {
	    printMenu();
	    return getCommand(gridSize);
	}

	int row = -1;
	int col = -1;
	try {
	    row = Integer.parseInt(entry[1]);
	    col = Integer.parseInt(entry[2]);
	} catch (NumberFormatException e) {
	    printMenu();
	    return getCommand(gridSize);
	}

        if (row < 0 || gridSize <= row || col < 0 || gridSize <= col) {
	    printMenu();
	    return getCommand(gridSize);
	}

	return new int[] { op, row, col };
	
    }
    // =============================================================================================================================



    // =============================================================================================================================
    public static void printMenu () {
	System.out.println("Command format: [R|F|H] [row #] [col #]\n" +
			   "\tR = Reveal a cell\n" +
			   "\tF = Flag a cell\n" +
			   "\tH = Help (this info)\n" +
			   "\tExample: R 3 6 (to reveal the cell in row 3, column 6");
    }
    // =============================================================================================================================


    
// =================================================================================================================================
} // class Minesweeper
// =================================================================================================================================