class Directions
  attr_reader :steps
  def initialize(steps)
    @steps = steps
  end

  def self.for(string)
    new string.split("")
  end

  def final_floor
    steps.reduce(0) { |current_floor, step| step == "(" ? current_floor + 1 : current_floor - 1 }
  end

  def first_basement_step
    steps.reduce([0, 0]) { |acc, step| acc[0] >= 0 ? (step == "(" ? [acc[0] + 1, acc[1] + 1] : [acc[0] - 1, acc[1] + 1]) : acc }[1]
  end
end