tictactoe.rb

require 'pry'

WINS = [[1,2,3], [4,5,6], [7,8,9], 
        [1,4,7], [2,5,8], [3,6,9], 
        [1,5,9], [3,5,7]]

def initialize_board    
  board = Hash[(1..9).to_a.zip((1..9).to_a)]  
end


def post_board(positions)  
  system ("clear")
  puts "     |     |     "
  puts "  #{positions[1]}  |  #{positions[2]}  |  #{positions[3]}     "
  puts "     |     |     "
  puts "-----+-----+-----"
  puts "     |     |     "
  puts "  #{positions[4]}  |  #{positions[5]}  |  #{positions[6]}     "
  puts "     |     |     "
  puts "-----+-----+-----"
  puts "     |     |     "
  puts "  #{positions[7]}  |  #{positions[8]}  |  #{positions[9]}     "
  puts "     |     |     "    
end

def spaces_available(positions)
  positions.select {|k,v| (1..9).include?(v) }
end


def get_player_choice(positions,msg='')
  puts "Pick your poison 1-9"  
  input = gets.chomp.to_i
  if spaces_available(positions).include?(input)
    positions[input] = "X"
  else    
    get_player_choice(positions,"Not available: Try Again")
  end  
end

def create_computer_choice(positions)  
  positions[spaces_available(positions).keys.sample] = "O"
end

def winner?(positions)  
  if positions.select { |_,v| v == "X" }.keys.permutation(3).to_a & WINS != [] 
    
  elsif positions.select { |_,v| v == "O" }.keys.permutation(3).to_a & WINS != []
    
  end
  
end

def all_squares_taken?(positions)  
  spaces_available(positions) == {}
end

positions = initialize_board

begin
  post_board(positions)
  get_player_choice(positions)
  create_computer_choice(positions)
  post_board(positions)
  winner = winner?(positions)
end until winner || all_squares_taken?(positions)
if winner
  puts "Its a winner"
else
  puts "It's a tie"
end