ruby_warrior_lvl_9.rb

class Player
  
  def initialize
    @directions = [:forward, :right, :backward, :left]
  end
  
  def play_turn(warrior)
    @warrior = warrior
    @move_direction = find_way
    survive
  end
   
  def survive #universal survivor algorithm
    case
    when next_space.enemy?
      if around_enemies.size >= 1
        @warrior.bind!(around_enemies.last)
      else
        case
        when @warrior.health <= 3
          @warrior.bind!(@move_direction)
        when can_explode?
          @warrior.detonate!(@move_direction)
        else
          @warrior.attack!(@move_direction)
        end   
      end
    when next_space.captive?
      if @warrior.health >= 6
        @warrior.rescue!(@move_direction)
      else  
        @warrior.rest!
      end
    else
      if @warrior.health < 8
        @warrior.rest!
      else  
        @warrior.walk!(@move_direction)
      end
    end  
  end
  
  private
  
  def find_way
    if @warrior.listen.size > 0
      ticking_places = @warrior.listen.select { |space| space.ticking? }
      if ticking_places.size > 0 
        @warrior.direction_of(ticking_places.last)
      else
        @warrior.direction_of(@warrior.listen.last)
      end
    else
      @warrior.direction_of_stairs
    end
  end
  
  def can_explode?
    if mined_spaces.size == 0 && @warrior.health > 6
      true
    elsif mined_spaces.any? { |mined_space| @warrior.distance_of(mined_space) > 2 } && @warrior.health > 4 
      true
    else
      false
    end
  end
  
  def mined_spaces
    @warrior.listen.select { |space| space.ticking? }
  end
  
  def next_space
    @warrior.feel(@move_direction)
  end
  
  def near_enemies
    @directions.select { |d| @warrior.feel(d).enemy? } 
  end
  
  def near_captives
    @directions.select { |d| @warrior.feel(d).captive? } 
  end
  
  def around_enemies
    @directions.select { |d| d != @move_direction && @warrior.feel(d).enemy? }
  end

end