Mars Rover Problem with proxy pattern

mars_rover_problem_with_proxy_pattern.rb

class Plateau
  attr_accessor :max_x, :max_y, :direction
  
  def initialize(x, y, direction = :n)
    @max_x = x.to_i
    @max_y = y.to_i
    @direction = direction.downcase.to_sym
  end
end

class Rover
  def location
    raise NotImplementedError, "#{self.class} has not implemented method '#{__method__}'"
  end
end

class RealRover < Rover
  attr_accessor :location, :directions, :plateau

  def initialize 
  end
end

class ProxyRover < Rover
  def initialize(real_rover)
    @real_rover = real_rover 
  end

  def check_plateau
    puts 'Proxy: Checking if plateau exists'
    puts "Location: #{@real_rover.location.inspect}"
    puts "Plateau: #{@real_rover.plateau.inspect}"  

    raise 'Rover is out of region' if !@real_rover.plateau || (@real_rover.plateau && (@real_rover.plateau.max_x < @real_rover.location.x) || (@real_rover.plateau.max_y < @real_rover.location.y))
  end

  def move_possible?
    puts 'Proxy: Checking if move is with in plateau'
  end
  
  def location
    @real_rover.location
  end

  def start
    check_plateau
    @real_rover.directions.each do |d|
      move_possible? if d == 'M'
      location.send(location.mapper[d.to_sym])
    end
  end
end

class Location
  LEFT = {
    n: :w,
    e: :n,
    s: :e,
    w: :s
  }

  RIGHT = {
    n: :e,
    e: :s,
    s: :w,
    w: :n
  }

  attr_accessor :x, :y, :direction
  
  def initialize(x = 0, y = 0, direction = :n)
    @x = x.to_i
    @y = y.to_i
    @direction = direction.downcase.to_sym
  end


  def turn_left
    @direction = LEFT[@direction]
  end
  
  def turn_right
    @direction = RIGHT[@direction]
  end
  
  def move
    case @direction
    when :n
      @y += 1
    when :e
      @x += 1
    when :s
      @y -= 1
    when :w
      @x -= 1
    end
  end

  def mapper
    {
      L: 'turn_left',
      R: 'turn_right',
      M: 'move'
    }
  end
end


#----- input ---------------- 
input = gets("\n\n").chomp
input = input.split("\n").reject(&:empty?)
     
area = input.shift
area = area.split
plateau = Plateau.new(area[0], area[1])

inputs = input.each_slice(2).to_a
rovers = []

inputs.each do |input|
  position = input[0].split
  directions = input[1].split(//).reject(&:empty?)

  real_rover = RealRover.new
  real_rover.location = Location.new(position[0], position[1], position[2])
  real_rover.directions = directions
  real_rover.plateau = plateau
   
  proxy_rover = ProxyRover.new(real_rover)
  rovers << proxy_rover
end
 
rovers.each do |r|
  r.start
  r = r.location
  puts "#{r.x} #{r.y} #{r.direction.to_s}"
end