# Search for translated templates or fall back to the default one
module ActionView # :nodoc: all
  class Base
    alias_method :globalize_old_render_file, :render_file
    
    # Name of file extensions which are handled internally in rails. Other types
    # like liquid has to register through register_handler.
    @@re_extension = /\.(erb|rjs|builder)$/
    
    @@globalize_path_cache = {}

    def render_file(template_path, use_full_path = true, local_assigns = {})
      @first_render ||= template_path
      
      if Globalize::Locale.active?
        localized_path = locate_globalize_path(template_path, use_full_path)
        # don't use_full_path -- we've already expanded the path
        globalize_old_render_file(localized_path, false, local_assigns)
      else
        globalize_old_render_file(template_path, use_full_path, local_assigns)
      end
    end
  
    private
    
      # Override because the original version is too minimalist
      def path_and_extension(template_path) #:nodoc:
        template_path_without_extension = template_path.sub(@@re_extension, '')
        [ template_path_without_extension, $1 ]
      end
      
      def locate_globalize_path(template_path, use_full_path)
        active_locale = Globalize::Locale.active
        locale_code = active_locale.code
        cache_key = "#{locale_code}:#{template_path}:#{template_format}"
        cached = @@globalize_path_cache[cache_key]
        return cached if cached

        template_path_without_extension, template_extension = path_and_extension(template_path)
        if use_full_path  
          if template_extension
            template_file_name = full_template_path(template_path_without_extension, template_extension)
          else
            template_extension = pick_template_extension(template_path).to_s
            unless template_extension
              raise ActionViewError, "No #{template_handler_preferences.to_sentence} template found for #{template_path} in #{view_paths.inspect}"
            end
            template_file_name = full_template_path(template_path, template_extension)
            template_extension = template_extension.gsub(/^.+\./, '') # strip off any formats
          end
        else
          template_file_name = template_path
          template_extension = template_path.split('.').last
        end
        
        pn = Pathname.new(template_file_name)
        dir, filename = pn.dirname, pn.basename('.' + template_extension)

        # first try "en-US" style
        localized_path = dir + 
          (filename.to_s + '.' + locale_code + '.' + template_extension)

        catch :found do
          throw :found if localized_path.exist?

          # then try "en" style
          if active_language = Globalize::Locale.active.language 
            localized_path = dir + 
              (filename.to_s + '.' + active_language.code + 
              '.' + template_extension)
            throw :found if localized_path.exist?
          end

          # otherwise use default
          localized_path = template_file_name
        end
        
        @@globalize_path_cache[cache_key] = localized_path.to_s
      end

  end
end