#tiktaktoe 01/17/2022

LINES = [[0,1,2],[3,4,5],[6,7,8],[0,3,6],[1,4,7],[2,5,8],[0,4,8],[2,4,6]]

board = Array.new(9)
9.times do |i|
  board[i] = i
end

def printBoard(board)
  9.times do |i|
    if i % 3 == 0
      print "\n -------------\n | "
    end
    print "#{board[i]} | "
  end
print "\n -------------\n"
end

def checkWin(board, x, o)
  for line in LINES do
    if board[line[0]] == "X" and board[line[1]] == "X" and board[line[2]] == "X"
    puts "X WINS!!!!!!"
    exit
  elsif board[line[0]] == "O" and board[line[1]] == "O" and board[line[2]] == "O"
    puts "O WINS!!!!!!"
    exit
  end
end
end

def isBoardFull(board)
  if not board.any?(0..9)
    puts "GAME OVER"
    exit
  end
end

player = "X"
x = Array.new
o = Array.new
def play(board, player, x, o)
  isBoardFull(board)
  printBoard(board)
  print "Place an #{player} "
  input = gets.to_i
  if board.include?(input)
  else
    puts "Bad input, pick a valid position"
    play(board, player, x, o)
  end
  board[input] = player
   if player == "X"
    x.push(input)
    player = "O"
  else
    o.push(input)
    player = "X"
  end 
  checkWin(board, x, o)
  play(board, player, x, o)
end

play(board, player, x, o)