Spinelで動くTic Tac Toe

spinel_tictactoe.rb

class TicTacToe
  # 0: 空, 1: プレイヤー1, 2: プレイヤー2
  MARKS = ["◯", "✕", " "]
  WIN_PATTERNS = [
    [0, 1, 2], [3, 4, 5], [6, 7, 8], # 横
    [0, 3, 6], [1, 4, 7], [2, 5, 8], # 縦
    [0, 4, 8], [2, 4, 6]             # 斜め
  ].freeze

  def initialize
    @board = [2, 2, 2, 2, 2, 2, 2, 2, 2]
    @current_player = 0
  end

  def play
    clear_screen
    puts "=== ◯✕ゲーム ==="
    puts "プレイヤー1: #{MARKS[0]}  プレイヤー2: #{MARKS[1]}"
    puts "位置は1-9の番号で指定してください"
    puts "\n何かキーを押してスタート..."
    gets

    loop do
      display_board
      break if game_over?

      make_move
      switch_player
    end

    display_result
  end

  private

  def clear_screen
    system("clear") || system("cls")
  end

  def display_board
    clear_screen
    puts "=== ◯✕ゲーム ==="
    puts "\n現在のボード:"
    puts " #{cell(0)} │ #{cell(1)} │ #{cell(2)} "
    puts "───┼───┼───"
    puts " #{cell(3)} │ #{cell(4)} │ #{cell(5)} "
    puts "───┼───┼───"
    puts " #{cell(6)} │ #{cell(7)} │ #{cell(8)} "
    puts "\n位置番号:"
    puts " 1 │ 2 │ 3 "
    puts "───┼───┼───"
    puts " 4 │ 5 │ 6 "
    puts "───┼───┼───"
    puts " 7 │ 8 │ 9 "
    puts
  end

  def cell(index)
    MARKS[@board[index]]
  end

  def make_move
    loop do
      print "#{MARKS[@current_player]} のターン (1-9): "
      input = gets.chomp

      position = input.to_i - 1

      if valid_move?(position)
        @board[position] = @current_player
        break
      else
        puts "\n❌ 無効な入力です。空いているマス(1-9)を選んでください。"
        sleep(1.5)
        display_board
      end
    end
  end

  def valid_move?(position)
    position.between?(0, 8) && @board[position] == 2
  end

  def switch_player
    @current_player = (@current_player == 0) ? 1 : 0
  end

  def game_over?
    winner? || board_full?
  end

  def winner?
    WIN_PATTERNS.each do |pattern|
      a = @board[pattern[0]]
      b = @board[pattern[1]]
      c = @board[pattern[2]]
      return true if a == b && b == c && a != 2
    end
    false
  end

  def board_full?
    i = 0
    while i < 9
      return false if @board[i] == 2
      i += 1
    end
    true
  end

  def display_result
    clear_screen
    puts "=== ゲーム終了 ==="
    puts "\n最終ボード:"
    puts " #{cell(0)} │ #{cell(1)} │ #{cell(2)} "
    puts "───┼───┼───"
    puts " #{cell(3)} │ #{cell(4)} │ #{cell(5)} "
    puts "───┼───┼───"
    puts " #{cell(6)} │ #{cell(7)} │ #{cell(8)} "
    puts

    if winner?
      switch_player # 最後にスイッチしたので戻す
      puts "🎉 #{MARKS[@current_player]} の勝ちです！"
    else
      puts "引き分けです！"
    end
  end
end

# ゲーム実行
if __FILE__ == $PROGRAM_NAME
  game = TicTacToe.new
  game.play
end