respond_to? ruby warrior rewrite

ruby_warrior_respond_to.rb

class Player

  def init(warrior)
    @warrior = warrior
    @low_side ||= 10
    @current_direction ||= :forward
    @backsteps ||= 0
    @skip ||= false
    @turn_count ||= 0
    @health ||= 20
    @surrounded ||= false
    unless @warrior.respond_to? :pivot!
      class << @warrior
        def pivot!
          change_direction
        end
      end
    end
    unless @warrior.respond_to? :look
      class << @warrior
        def look(direction)
          []
        end
      end
    end
  end
  
  def play_turn(warrior)
    init(warrior)
    sit_rep
    surrounded?
    do_stuff! unless @skip
    @skip = false
  end
  
  def sit_rep
    if @turn_count < 1
      front = ranged_enemy? change_direction
      back = ranged_enemy? change_direction
      skip_actions!
      @surrounded = front && back
      @warrior.pivot! if @surrounded
      @turn_count += 1
    end
    hit_wall?
  end
  
  def ranged_enemy?(direction)
    @warrior.look(@current_direction).detect{|space| space.enemy?}
  end
  
  def surrounded?
    if @surrounded && @warrior.feel.stairs?
      @warrior.pivot!
      #change_direction
      skip_actions!
      @low_side = 20
      @surrounded = false
    end
  end
  
  def skip_actions!
    @skip = true
  end
  
  def change_direction
    if @current_direction == :forward
      @current_direction = :backward
      :backward
    elsif @current_direction == :backward
      @current_direction = :forward
      :forward
    end
  end
  
  def do_stuff!
    if @warrior.health < @low_side && @warrior.feel(@current_direction).empty?
      @warrior.rest!
      @low_side = 20
    elsif @warrior.feel(@current_direction).enemy?
      @warrior.attack!(@current_direction)
    elsif @warrior.feel(@current_direction).captive?
      @warrior.rescue!(@current_direction)
    elsif @warrior.look(@current_direction).detect{|item| item.captive?}
      @warrior.walk!
    elsif @warrior.look(@current_direction)[2].enemy?
      @warrior.shoot!
    else
      @warrior.walk!(@current_direction)
      @low_side = 10
      @backsteps = 0
    end
      @health = @warrior.health
  end
  
  def backstep
    change_direction
    @warrior.walk!(@current_direction)
    change_direction
    @backsteps += 1
  end
  
  def hit_wall?
    if @warrior.feel(@current_direction).wall?
      @warrior.pivot!
      skip_actions!
    end
  end
end