Ruby Warrior on bloc.io solution

player.rb

class Player
  REST_HEALTH = 15
  FLEE_HEALTH = 7
  
  def play_turn(warrior)
    @last_known_health ||= warrior.health
    @direction ||= :forward
    feel_space = warrior.feel @direction
    
    if clear_shot?(warrior)
      warrior.shoot!
    elsif feel_space.empty?
      if should_flee?(warrior)
        @direction = :backward
        warrior.walk! @direction
      elsif should_rest?(warrior)
        warrior.rest! 
      else
        warrior.walk! @direction
      end
    elsif feel_space.captive?
      warrior.rescue! @direction
    elsif feel_space.wall?
      @direction = :forward
      warrior.pivot!
    else
      warrior.attack!
    end
    
    @last_known_health = warrior.health
  end
  
  private
  
  def clear_shot? warrior
    glance = warrior.look @direction
    result = glance.find { |space| space.captive? || space.enemy? }
    result && result.enemy? && safe?(warrior)
  end
  
  def should_flee?(warrior)
    bad_health = warrior.health < FLEE_HEALTH
    !safe?(warrior) && bad_health
  end
  
  def should_rest?(warrior)
    bad_health = warrior.health < REST_HEALTH
    safe?(warrior) && bad_health
  end
  
  def safe? warrior
    warrior.health >= @last_known_health
  end
end