warrior.rb

class Player

  def initialize
    @last_health = 20
  end

  def play_turn(warrior)
    
    possible_actions = actions.select { |action| action.can? @last_health }
    possible_actions.first.go!

    @last_health = warrior.health
  end
  
  def actions
    [
      MoveAction.new warrior,
      HealthAction.new warrior,
      AttackAction.new warrior,
      RescueAction.new warrior,
      RetreatAction.new warrior
    ]
  end
end

class WarriorAction
  def initialize warrior
    @warrior = warrior
  end
end

class RetreatAction < WarriorAction
  def can? last_health = nil
    @warrior.health < last_health and @warrior.health < 10 and @warrior.feel.empty?
  end

  def go!
    @warrior.pivot!
  end
end

class HealthAction < WarriorAction
  def can? last_health = nil
    @warrior.health >= last_health and @warrior.feel.empty? and @warrior.health < 20
  end

  def go!
    @warrior.rest!
  end
end

class BowAction < WarriorAction
  def can? last_health = nil
    spaces = @warrior.look
    !spaces[0].captive? and !spaces[1].captive? and spaces[2].enemy?
  end

  def go!
    @warrior.shoot!
  end
end

class SwordAction < WarriorAction
  def can? last_health = nil
    @warrior.feel.enemy?
  end

  def go!
    @warrior.attack!
  end
end

class AttackAction < WarriorAction
  def initialize warrior
    super warrior
    @sword = SwordAction.new warrior
    @bow = BowAction.new warrior
  end

  def can? last_health = nil
    @sword.can? or @bow.can?
  end

  def go!
    if @sword.can?
      @sword.go!
    else
      @bow.go!
    end
  end

end

class RescueAction < WarriorAction
  def can? last_health = nil
    @warrior.feel.captive?
  end

  def go!
    @warrior.rescue!
  end
end

class MoveAction < WarriorAction
  def can? last_health = nil
    @warrior.feel.empty? or @warrior.feel.wall?
  end

  def go!
    if @warrior.feel.wall?
      @warrior.pivot!
    else
      @warrior.walk!
    end
  end

  def hitWall?
    @warrior.feel.wall?
  end
end