module VarianceHelper
  def heading_gutter
    30
  end

  def footer_gutter
    50
  end

  def measure_row_height
    40
  end

  def graph_height(number_of_rows)
    number_of_rows * measure_row_height + heading_gutter + footer_gutter
  end

  def graph_background_height(number_of_rows:)
    graph_height(number_of_rows) - footer_gutter
  end

  def measure_row_bar_height
    20
  end

  def label_padding_right
    24
  end

  def label_width_percentage
    30
  end

  def graph_width_percentage
    100 - label_width_percentage
  end

  def zones
    %w(warning watch growth approval ideal)
  end

  def zone_width_percentage
    100.0/zones.size
  end

  def measures_with_insufficient_data(presenters:)
    presenters.filter { |presenter| presenter.score == nil }
  end

  def measures_with_sufficient_data(presenters:)
    presenters.filter { |presenter| presenter.score != nil }
  end
end