lightbulb.rb

class LightBulb
  attr_accessor :state, :fitting, :filament, :wattage, :voltage

  def initialize(wattage, fitting)
    @wattage = wattage
    @fitting = fitting
    puts "creating a light bulb with #{wattage}W with a fitting of '#{fitting}'"
  end

  def is_on?
    state == "on" ? true : false
  end


  def brightness
    wattage
  end

  def toggle
    puts "LightBulb#toggle #turning lightbulb on!"
    @state = "on"
  end
end

class EnergySavingLightBulb < LightBulb
  def initalize(wattage, fitting)
    @filament = "fluorescent"
    @wattage = wattage
    super(wattage, fitting)
  end

  def brightness
    wattage * 2
  end

end

class InvalidBulbException < StandardError; end

class Lamp
  #attr_reader :bulb

  def initalize(fitting)
    @fitting = fitting
  end
  
  def mount(bulb)
    if @fitting == bulb.fitting
      @bulb = bulb
      return false
    else
      return true
    end
  end
end
@bulb = EnergySavingLightBulb.new(25, "screw")
# puts "@bulb is on? #=> #{@bulb.is_on?}"
# puts "turning the lightbulb on!"
@bulb.toggle
# puts "@bulb is on? #=> #{@bulb.is_on?}"

@lamp = Lamp.new("screw")
@lamp.mount @bulb