rubywarrior.rb

class Direction
  attr_accessor :current
  
  def initialize(dir = nil)
    @current = dir
  end
  
  def current
    @current ||= :forward
  end
  
  def inverse!
    @current = opposite
  end
  
  def opposite
    (current == :backward)? :forward : :backward
  end
end

class Player

  def play_turn(warrior)
    @warrior = warrior
    
    @direction ||= Direction.new(:backward)

    space = warrior.feel(@direction.current)

    if space.empty?
      if under_attack?
        warrior.walk!(@direction.opposite)
      else
        if need_rest?
          warrior.rest!
        else
          warrior.walk!(@direction.current)
        end
      end
    else
      if space.enemy?
        warrior.attack!(@direction.current)
      elsif space.captive?
        warrior.rescue!(@direction.current)
      elsif space.wall?
        @direction.inverse!  
      end
    end
    
    register_life_level
  end
  
  private
  
  def register_life_level
    @previous_health = @warrior.health
  end
    
  def under_attack?
    return false if @previous_health.nil?
    @warrior.health < @previous_health
  end
    
  def need_rest?
    @warrior.health < 15
  end
  
end