public class Board {
	
	private char[][] board;
	
	private final int ROWS = 6;
	private final int COLS = 7;
	
	public Board() {
		board = new char[ROWS][COLS];
		for(int i = 0; i < board.length; i++) {
			for(int j = 0; j < board[i].length; j++) {
				board[i][j] = ' ';
			}
		}
	}
	
	/**
	 * 
	 * @param col - a number 0-6
	 * @param color
	 * @return
	 */
	public boolean placeChecker(int col, char color) {

		if(board[0][col] != ' ') {
			//debug - remove 
			System.out.println("Error: cannot place checker");
			return false;
		}
		
		for(int i = ROWS-1; i >= 0; i--) {
			if(board[i][col] == ' ') {
				board[i][col] = color;
				return true;
			}
		}
		return false;
	}
	
	public boolean checkWin() {
		if(checkRow() == true) {
			return true;
		}
		
		return false;
 	}
	
	public boolean checkRow() {
		
		for(int i = ROWS-1; i >= 0; i--) {
			char winner = board[i][COLS/2];
			if(winner == ' ') {
				continue;
			}
			int countright = 0, countleft = 0;
			int j = 4;
			//loop to count to the right
			while(j < COLS && board[i][j] == winner) {
				j++;
				countright++;
			}
			j = 2;
			//loop to count to the left
			while(j >= 0 && board[i][j] == winner) {
				j--; countleft++;
			}
			if((countleft+countright) >= 3) {
				return true;
			}
		}
		return false;
	}
	
	public void display() {
		for(int i = 0; i < ROWS; i++) {
			for(int j = 0; j < COLS; j++) {
				System.out.print("|" + board[i][j] + "|");
			}
			System.out.println();
		}
		
	}
	
	public boolean isFull() {
		for(int i = 0; i < COLS; i++) {
			if(board[0][i] == ' ') {
				return false;
			}
		}
		return true;
		
	}
	
	public static void main(String[] args) {
		Board b = new Board();
		b.placeChecker(3, 'R');
		b.placeChecker(3, 'B');
		b.placeChecker(4, 'R');
		b.placeChecker(4, 'B');
		b.placeChecker(5, 'R');
		b.placeChecker(5, 'B');
		//placeChecker(6, 'R');
		//b.placeChecker(3, 'B');
		b.display();
		
		if(b.checkWin()) {
			System.out.println("There is a win");
		} else {
			System.out.println("No win");
		}
		
	}
}