module Sinatra
  module AssetPack
    module Helpers
      def css(name, options={})
        show_asset_pack :css, name, options
      end

      def js(name, options={})
        show_asset_pack :js, name, options
      end

      def img(src, options={})
        attrs = { :src => src }.merge(options)

        local = settings.assets.local_file_for src
        if local
          i = Image.new(local)
          attrs[:src] = BusterHelpers.add_cache_buster(src, local)
          if i.dimensions?
            attrs[:width]  ||= i.width
            attrs[:height] ||= i.height
          end
        end

        "<img#{HtmlHelpers.kv attrs} />"
      end

      def show_asset_pack(type, name, options={})
        pack = settings.assets.packages["#{name}.#{type}"]
        return ""  unless pack

        if settings.production?
          pack.to_production_html options
        else
          pack.to_development_html options
        end
      end

      def asset_filter_css(str)
        Css.preproc str, settings.assets
      end

      def asset_path_for(file, from)
        settings.assets.dyn_local_file_for file, from
      end
    end
  end
end