import java.util.Random;
import java.util.ArrayList;

public class MineBoard {
  private int[][] board;
  private String[][] boardh;
  private int mines;

  //constructor
  //uses int to determine size and mines
  public MineBoard (int a) {
    if (a == 2) {
      board = new int[18][18];
      mines = 40;
    } else if (a == 3) {
      board = new int[26][26];
      mines = 99;
    } else {
      board = new int[10][10];
      mines = 10;
    }
    boardh = new String[board.length-2][board.length-2];
    for (int i = 0; i < board.length; i++) {
      board[0][i] = -1;
      board[9][i] = -1;
      board[i][9] = -1;
      board[i][0] = -1;
    }
    for (int i = 0; i < boardh.length; i++) {
      for (int j = 0; j < boardh.length; j++) {
        boardh[i][j] = " - ";
      }
    }
  }
  //fills board later so that the user cannot lose on their first turn
  public void fillBoard(int a, int b) {
    Random rand = new Random();
    int c,d;
    a++;
    b++;
    for (int i = 0; i < mines; i++) {
      c = rand.nextInt(board.length-2) + 1;
      d = rand.nextInt(board.length-2) + 1;
      if (((c >= a-1 && c <= a+1) && (d >= b-1 && d <= b+1)) || ((c >= b-1 && c <= b+1) && (d >= a-1 && d <= a+1))) {
        i--;
      } else if (board[c][d] == 10) {
        i--;
      } else {
        board[c][d] = 10;
      }
    }
    for (int i = 1; i < board.length-1; i++) {
      for (int j = 1; j < board.length-1; j++) {
        board[i][j] = checkBorder(i,j);
      }
    }
  }
  // helper to remove spam in the double for loop in above method
  public int checkBorder (int i, int j) {
    int sum = 0;
    if (board[i][j] == 10) {
      return 10;
    }
    for (int f = i-1; f < i + 2; f++) {
      for (int g = j-1; g < j + 2; g++) {
        if (board[f][g] == 10) {
          sum++;
        }
      }
    }
    return sum;
  }
  public void zeroBorder (int i, int j) {
    if (i <= 0 || j <= 0) {
      return;
    }
    if (i > boardh.length || j > boardh.length) {
      return;
    }
    if (!(boardh[i-1][j-1]).equals(" - ")) {
      return;
    }
    boardh[i-1][j-1] = " " + board[i][j] + " ";
    if (board[i][j] != 0) {
      return;
    }
      zeroBorder(i+1,j);
      zeroBorder(i-1,j);
      zeroBorder(i,j+1);
      zeroBorder(i,j-1);
  }
  public boolean uncover (int i,int j) {
    if (i < 0 || j < 0) {
      return true;
    }
    if (i > boardh.length || j > boardh.length) {
      return true;
    }
    if (!boardh[i][j].equals(" - ")) {
      return true;
    }
    if ((board[i+1][j+1]) == 10) {
      boardh[i][j] = " 10 ";
      return false;
    }
    if (board[i+1][j+1] == 0) {
      zeroBorder(i+1,j+1);
      return true;
    }
    boardh[i][j] = " " + board[i+1][j+1] + " ";
    return true;
  }
  public boolean win () {
    int count = 0;
    for (int i = 0; i < boardh.length; i++) {
      for (int j = 0; j < boardh.length; j++) {
        if (!boardh[i][j].equals(" - ")) {
          count++;
        }
      }
    }
    int difference = (boardh.length * boardh.length) - count;
    if (difference == mines) {
      return true;
    } else {
      return false;
    }
  }
  public String toString() {
    String a = "";
    for (int i = 0; i < boardh.length; i++) {
      for (int j = 0; j < boardh.length; j++) {
        a += boardh[i][j];
      }
      a += "\n";
    }
    return a;
  }
}