class gamePiece:
    def __init__(self, row, col):
        self.row = row
        self.col = col

    def updateCoordinates(self, row, col):
        self.row = row
        self.col = col

class FBoard:
    def __init__(self):
        self.board = []
        self.state = "UNFINISHED"

        for i in range(0, 8):
            self.board.append([])
            for j in range(0, 8):
                if i == 0 and j == 3:
                    self.board[i].append('x')
                    self.gamePieceX = gamePiece(i, j)
                elif i == 7 and (j % 2) == 0:
                    self.board[i].append('o')
                else:
                    self.board[i].append(' ')

    def __str__(self):
        returnStr = "  ---------------------------------\n"
        returnStr += "  | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |\n"
        returnStr += "  ---------------------------------\n"
        for i in range(0, len(self.board)):
            returnStr += str(i) + " | "
            for j in range(0, len(self.board[i])):
                returnStr += self.board[i][j] + " | "
            returnStr += "\b\n"
        returnStr += "  ---------------------------------\n"
        returnStr += "Game State: " + self.state + "\n"
        return returnStr

    def get_game_state(self):
        return self.state

    def update_game_state(self):
        if(self.state == "UNFINISHED"):
            if(self.gamePieceX.row == 7):
                self.state = "X_WON"
            if(self.board[self.gamePieceX.row - 1][self.gamePieceX.col - 1] == 'o' and
               self.board[self.gamePieceX.row + 1][self.gamePieceX.col + 1] == 'o' and
               self.board[self.gamePieceX.row - 1][self.gamePieceX.col + 1] == 'o' and
               self.board[self.gamePieceX.row + 1][self.gamePieceX.col - 1] == 'o'):
                self.state = "O_WON"

    def validCoordinates(self, rowBefore, colBefore, rowAfter, colAfter, x):
        if(0 <= rowAfter < 8 and
           0 <= colAfter < 8 and
           self.board[rowAfter][colAfter] == ' '):
            if(x):
               return (abs(rowAfter - rowBefore) == 1 and
                       abs(colAfter - colBefore) == 1)
            else:
                return (self.board[rowBefore][colBefore] == 'o' and
                        rowBefore - rowAfter == 1 and
                        abs(colAfter - colBefore) == 1)
    def movePiece(self, rowBefore, colBefore, rowAfter, colAfter, x):
        self.board[rowAfter][colAfter] = 'x' if x else 'o'
        self.board[rowBefore][colBefore] = ' '
        if(x):
            self.gamePieceX.updateCoordinates(rowAfter, colAfter)
        self.update_game_state()

    def move_x(self, rowTo, colTo):
        if(self.state == "UNFINISHED"):
            rowBefore = self.gamePieceX.row
            colBefore = self.gamePieceX.col
            if self.validCoordinates(rowBefore, colBefore, rowTo, colTo, True):
                self.movePiece(rowBefore, colBefore, rowTo, colTo, True)
                return True
        return False

    def move_o(self, rowBefore, colBefore, rowTo, colTo):
        if(self.state == "UNFINISHED"):
            if self.validCoordinates(rowBefore, colBefore, rowTo, colTo, False):
                self.movePiece(rowBefore, colBefore, rowTo, colTo, False)
                return True
        return False

fb = FBoard()
print(fb)
fb.move_x(1,4);
fb.move_x(2,5);
fb.move_o(7,0,6,1);
print(fb)