=begin
level 1

 ---------
|@       >|
 ---------

=end

class Player
  def play_turn(warrior)
    warrior.walk!
  end
end

=begin
level 2

 ---------
|@    s  >|
 ---------

=end

class Player
  def play_turn(warrior)
    warrior.feel.empty?? warrior.walk! : warrior.attack!
  end
end

=begin
level 3

 ---------
|@ s ss s>|
 ---------
=end

class Player
  def play_turn(warrior)
    warrior.feel.empty? && warrior.health<10? warrior.rest! : warrior.feel.empty?? warrior.walk! : warrior.attack!
  end
end

=begin
level 4

 -------
|@ Sa S>|
 -------
=end

class Player

  def play_turn(warrior)
    @health = warrior.health unless @health
    under_attack=false
    if warrior.health<@health then under_attack=true end

    if (warrior.feel.empty?) && (warrior.health<18) && (not under_attack)
       warrior.rest!
    else
      if warrior.feel.empty?
        warrior.walk!
       else warrior.attack! end end

    @health=warrior.health
  end
end