class Difficult
  attr_reader :level

  def initialize(level)
    @level = level.downcase
  end

  def to_i
    case @level
    when name('hell') then 1
    when name('medium') then 2
    when name('easy') then 3
    end
  end

  private

  def name(difficult)
    Codebreaker::Game::DIFFICULTS[difficult.to_sym][:name]
  end
end