module Carto
  module Styles
    module Presenters
      class CartoCSS
        def initialize(class_name: 'layer', cartocss_array: [])
          @class_name = class_name
          @cartocss_array = cartocss_array
        end

        def to_s
          "##{@class_name} {\n"\
          "#{formatted_cartocss_body}\n"\
          "}"
        end

        private

        def formatted_cartocss_body
          formatted_cartocss_properties = @cartocss_array.map do |cartocss_property|
            format_cartocss_property(cartocss_property)
          end

          formatted_cartocss_properties.join("\n")
        end

        def format_cartocss_property(cartocss_property)
          property_class = cartocss_property.class.to_s

          case property_class
          when 'String'
            "  #{cartocss_property}"
          when 'Hash'
            formatted_cartocss_property = cartocss_property.keys.map do |key|
              "  #{key} {\n"\
              "#{cartocss_property[key].map { |v| "    #{v}" }.join("\n")}\n"\
              "  }"
            end

            formatted_cartocss_property.join("\n")
          else
            CartoDB::Logger.error(message: "Unrecognized property class given to CartoCSS: #{property_class}")
            ""
          end
        end
      end
    end
  end
end