maternity_benefits_calculator.rb

module SmartAnswer::Calculators
  class MaternityBenefitsCalculator < BirthCalculator
    def test_period
      period_start = qualifying_week.first - 51.weeks
      period_end = expected_week.first - 1.day
      period_start..period_end
    end

    def sunday_before_eleven_weeks(due_date)
      result = Date.parse(due_date) - 11.weeks
      result -= 1 while (result.cwday != 7)
      result
    end

    def smp_rate
      if due_date_before_7th_april_2013?
        135.45
      elsif due_date_before_6th_april_2014?
        136.78
      else
        138.18
      end
    end

    def ma_rate
      if due_date_before_7th_april_2013?
        135.45
      elsif due_date_before_6th_april_2014?
        136.78
      else
        138.18
      end
    end

    def smp_lel
      if due_date_before_14th_july_2013?
        107
      elsif due_date_before_6th_april_2014?
        109
      else
        111
      end
    end

  private

    def due_date_before_7th_april_2013?
      @due_date < Date.parse("7th April 2013")
    end

    def due_date_before_14th_july_2013?
      @due_date < Date.parse("14th July 2013")
    end

    def due_date_before_6th_april_2014?
      @due_date < Date.parse("6th April 2014")
    end
  end
end