class AIPlayer

# File lib/fiveinarow/ai_player.rb, line 21
def ai(board)
  if self.sym == Cell::PLAYER_A
    opsym = Cell::PLAYER_B
  else
    opsym = Cell::PLAYER_A
  end

  # 0 is EMPTY_CELL
  # 1 is AI (this one)
  # 2 is opponent
  # -1 is end of pattern

  [
      # my four, go for win
      [0, [0, 1, 1, 1, 1]],
      [1, [1, 0, 1, 1, 1]],
      [2, [1, 1, 0, 1, 1]],

      # his four, need to block
      [0, [0, 2, 2, 2, 2]],
      [1, [2, 0, 2, 2, 2]],
      [2, [2, 2, 0, 2, 2]],

      # my three, go for four
      [0, [0, 1, 1, 1, 0]],
      [2, [0, 1, 0, 1, 1]],
      [1, [1, 0, 1, 1, 0]],
      [1, [0, 0, 1, 1, 1]],

      # his three, need to block
      [0, [0, 2, 2, 2, 0]],
      [1, [2, 0, 2, 2, 0]],
      [1, [0, 2, 0, 2, 2]],

      # my two, let's make three
      [2, [0, 1, 0, 1, 0]],
      [1, [0, 0, 1, 1, 0]],
      [1, [0, 0, 1, 1, 0, 0]],

      # really nothing to do, lets make mark next to another
      [1, [0, 0, 1, 0, 0]],
      [1, [0, 0, 1, 0]],
      [0, [0, 1, 0]],

      # okay... so, just block something
      [1, [0, 0, 2, 0]],
      [0, [0, 2, 0]]

  ].each do |pattern|
    puts "pattern = #{pattern}"
    (0..board.size - 1).each do |row|
      (0..board.size - 1).each do |col|
        [[1, 1], [1, 0], [-1, 1], [0, 1], [-1, -1], [-1, 0], [1, -1], [0, -1]].each do |k|
          rd = k[0]
          cd = k[1]
          s = 0
          pattern[1].each_with_index.map do |pval, pind|
            if pval == 0
              break if board.on(row + rd*pind, col + cd*pind) != 0
            elsif pval == 1
              break if board.on(row + rd*pind, col + cd*pind) != self.sym
            elsif pval == 2
              break if board.on(row + rd*pind, col + cd*pind) != opsym
            end
            s += 1
          end
          if s == pattern[1].length
            board.mark_cell(row + rd*pattern[0], col+ cd*pattern[0], self.sym)
            return true
          end
        end
      end
    end
  end

  puts "oh shit"
  return false
end

# File lib/fiveinarow/ai_player.rb, line 5
def make_move(board)
  ai(board)
  "prng = Random.new

  loop do
    row = prng.rand(0..board.size - 1)
    col = prng.rand(0..board.size - 1)

    if board.grid[row][col].e?
      board.grid[row][col].set(@sym)
      break
    end
  end"
end