package com.java21days.banko;

import java.awt.Insets;
import java.awt.GridLayout;
import javax.swing.JPanel;

public class Board extends JPanel {
   // the board's rows, columns, and total money bags
   protected int rows;
   protected int columns;
   protected int money_bags;
   // the buttons on the board
   public Button[][] square;
   // the game frame
   public Banko app;

   public Board(Banko app, int rows, int columns, int money_bags) {
       // store the frame
       this.app = app;
       // store the rows, columns, and money bags on the board
       this.rows = rows;
       this.columns = columns;
       this.money_bags = money_bags;
       // create the board and set its layout
       square = new Button[rows][columns];
       GridLayout grid = new GridLayout(rows, columns);
       setLayout(grid);
       // set up each button
       for (int row = 0; row < rows; row++) {
            for (int column = 0; column < columns; column++) {
                // create the button
                Button button = new Button(this, row, column);
                // add it to the board
                square[row][column] = button;
                // assign the frame to monitor button clicks
                button.addActionListener(app);
                // add the button to the user interface
                add(button);
            }
       }
       setup();
   }

   // set up the board for gameplay
   public final void setup() {
       // set up each button for gameplay
       for (int row = 0; row < rows; row++) {
            for (int column = 0; column < columns; column++) {
                square[row][column].setup();
            }
       }
       // count the number of money bags hidden so far
       int hidden = 0;
       while (hidden < money_bags) {
            // choose a random position for the money bag
            int row = (int)Math.floor(Math.random() * rows);
            int column = (int)Math.floor(Math.random() * columns);
            if (square[row][column].state == -2) {
                // there's already a money bag in that square
                continue;
            }
            // hide a money bag and increment the count
            square[row][column].state = -2;
            hidden++;
       }
       // count the number of bags in adjacent squares
       for (int row = 0; row < rows; row++) {
            for (int column = 0; column < columns; column++) {
                if (square[row][column].state == 0) {
                    // count the bags adjacent to this square
                    square[row][column].near = getBagCount(row, column);
                }
            }
       }
   }

   // determine the money bags adjacent to a square
   private int getBagCount(int row, int column) {
       // start counting
       int count = 0;
       /* set the lower and upper boundaries of the search area around
           a square, making sure not to go outside the game board */
       int above = (row > 0) ? row - 1 : row;
       int below = (row < rows - 1) ? row + 1 : row;
       int left = (column > 0) ? column - 1 : column;
       int right = (column < columns - 1) ? column + 1 : column;
       for (int i = above; i <= below; i++) {
            for (int j = left; j <= right; j++) {
                if (square[i][j].state == -2) {
                    /* a money bag is nearby, so increment the count
                       for this square */
                       count++;
                }
            }
       }
       return count;
   }

   // set the margins of the game board to 15 pixels
   @Override
   public Insets getInsets() {
       // set the top, left, bottom and right inset margins
       return new Insets(15, 15, 15, 15);
   }
}