Class: ConnectN::ComputerPlayer

Inherits:
Player
  • Object
show all
Includes:
Winnable
Defined in:
lib/connect_n/player/computer_player/computer_player.rb

Instance Attribute Summary collapse

Attributes inherited from Player

#disc, #name

Instance Method Summary collapse

Methods included from Winnable

#win?

Constructor Details

#initialize(board:, opponent_disc:, name: 'Computer', disc: '🧊', min_to_win: 4, difficulty: 0, delay: 0) ⇒ ComputerPlayer

Returns a new instance of ComputerPlayer.



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# File 'lib/connect_n/player/computer_player/computer_player.rb', line 13

def initialize(
  board:, opponent_disc:, name: 'Computer',
  disc: '🧊',
  min_to_win: 4,
  difficulty: 0,
  delay: 0
)
  super(name: name, disc: disc)
  @min_to_win = min_to_win
  @difficulty = difficulty
  @delay = delay
  @board = board
  @opponent_disc = opponent_disc
  @scores = { disc => 10_000, opponent_disc => -10_000 }
end

Instance Attribute Details

#delay ⇒ Object

Returns the value of attribute delay.



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# File 'lib/connect_n/player/computer_player/computer_player.rb', line 10

def delay
  @delay
end

#difficulty ⇒ Object

Returns the value of attribute difficulty.



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# File 'lib/connect_n/player/computer_player/computer_player.rb', line 10

def difficulty
  @difficulty
end

#min_to_win ⇒ Object (readonly)

Returns the value of attribute min_to_win.



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# File 'lib/connect_n/player/computer_player/computer_player.rb', line 11

def min_to_win
  @min_to_win
end

#opponent_disc ⇒ Object (readonly)

Returns the value of attribute opponent_disc.



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# File 'lib/connect_n/player/computer_player/computer_player.rb', line 11

def opponent_disc
  @opponent_disc
end

Instance Method Details

#pick ⇒ Object 



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# File 'lib/connect_n/player/computer_player/computer_player.rb', line 29

def pick
  sleep delay
  best_score = -Float::INFINITY
  best_pick = nil
  @board.cols_amount.times do |pick|
    next unless @board.valid_pick?(pick)

    board_copy = @board.clone
    row_num, col_num = board_copy.drop_disc(disc, at_col: pick)
    score = minimax(board_copy, disc, row_num, col_num)
    if score >= best_score
      best_score = score
      best_pick = pick
    end
  end
  best_pick
end