module Middleman::CoreExtensions::DefaultHelpers::Helpers

def asset_path(kind, source)
   return source if source =~ /^http/
   asset_folder  = case kind
     when :css    then settings.css_dir
     when :js     then settings.js_dir
     when :images then settings.images_dir
     else kind.to_s
   end
   source = source.to_s.gsub(/\s/, '')
   ignore_extension = (kind == :images) # don't append extension
   source << ".#{kind}" unless ignore_extension or source =~ /\.#{kind}/
   result_path   = source if source =~ %r{^/} # absolute path
   result_path ||= asset_url(source, asset_folder)
   timestamp = asset_timestamp(result_path)
   "#{result_path}#{timestamp}"
 end

def auto_javascript_include_tag(separator="/")
  auto_tag(:js, separator) do |path|
    javascript_include_tag path
  end
end

def auto_stylesheet_link_tag(separator="/")
  auto_tag(:css, separator) do |path|
    stylesheet_link_tag path
  end
end

def auto_tag(asset_ext, separator="/", asset_dir=nil)
  if asset_dir.nil?
    asset_dir = case asset_ext
      when :js  then self.class.js_dir
      when :css then self.class.css_dir
    end
  end
  path = request.path_info.dup
  # If the basename of the request as no extension, assume we are serving a
  # directory and join index_file to the path.
  path = File.join(path, self.class.index_file) if File.extname(path).empty?
  path = path.gsub(%r{^/}, '')
  path = path.gsub(File.extname(path), ".#{asset_ext}")
  path = path.gsub("/", separator)
  view = File.join(self.class.views, asset_dir, path)
  yield path if File.exists?(view) or Dir["#{view}.*"].any?
end

def page_classes
  path = request.path_info.dup
  path << settings.index_file if path.match(%r{/$})
  path = path.gsub(%r{^/}, '')
  classes = []
  parts = path.split('.')[0].split('/')
  parts.each_with_index { |path, i| classes << parts.first(i+1).join('_') }
  
  classes.join(' ')
end