module OccsnExperiences
  module OccsnCheckout
    class << self
      # Inspired by Kaminari
      def load!
        if rails?
          register_rails_engine
        elsif sprockets?
          register_sprockets
        end
      end

      # Paths
      def gem_path
        @gem_path ||= File.expand_path '..', File.dirname(__FILE__)
      end

      def stylesheets_path
        File.join assets_path, 'stylesheets'
      end

      def fonts_path
        File.join assets_path, 'fonts'
      end

      def javascripts_path
        File.join assets_path, 'javascripts'
      end

      def assets_path
        @assets_path ||= File.join gem_path, 'lib', 'assets'
      end

      # Environment detection helpers
      def sprockets?
        defined?(::Sprockets)
      end

      def rails?
        defined?(::Rails)
      end

      private

      def register_rails_engine
        require 'occsn_checkout/engine'
      end

      def register_sprockets
        Sprockets.append_path(stylesheets_path)
        Sprockets.append_path(fonts_path)
        Sprockets.append_path(javascripts_path)
      end
    end
  end
end

OccsnExperiences::OccsnCheckout.load!