module Playbook::Flex

def self.included(base)
  base.prop :flex
end

def flex_options
  {
    flex: "flex",
  }
end

def flex_props
  selected_props = flex_options.keys.select { |sk| try(sk) }
  return nil unless selected_props.present?
  selected_props.map do |k|
    flex_value = send(k)
    if flex_value.is_a?(Hash)
      flex_value.map do |media_size, value|
        "flex_#{media_size}_#{value}" if flex_values.include? value.to_s
      end
    else
      "flex_#{flex_value}" if flex_values.include? flex_value.to_s
    end
  end.compact.join(" ")
end

def flex_values
  %w[auto initial 0 1 2 3 4 5 6 7 8 9 10 11 12 none]
end