module Middleman::Features::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 = (asset_folder.to_s == kind.to_s) # 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 asset_url(path, prefix="")
  Middleman::Assets.get_url(path, prefix, request)
end

def auto_stylesheet_link_tag(separator="/")
  path = request.path_info.dup
  path << self.class.index_file if path.match(%r{/$})
  path = path.gsub(%r{^/}, '')
  path = path.gsub(File.extname(path), '')
  path = path.gsub("/", separator)
  css_file = File.join(self.class.public, self.class.css_dir, "#{path}.css")
  sass_file = File.join(self.class.views, self.class.css_dir, "#{path}.css.sass")
  scss_file = File.join(self.class.views, self.class.css_dir, "#{path}.css.scss")
  less_file = File.join(self.class.views, self.class.css_dir, "#{path}.css.less")

  if File.exists?(css_file) || File.exists?(sass_file) || File.exists?(scss_file) || File.exists?(less_file)
    stylesheet_link_tag "#{path}.css"
  end
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