module.exports = function(hljs) {
  var FILTER = {
    className: 'filter',
    begin: /\|[A-Za-z]+\:?/,
    keywords:
      'truncatewords removetags linebreaksbr yesno get_digit timesince random striptags ' +
      'filesizeformat escape linebreaks length_is ljust rjust cut urlize fix_ampersands ' +
      'title floatformat capfirst pprint divisibleby add make_list unordered_list urlencode ' +
      'timeuntil urlizetrunc wordcount stringformat linenumbers slice date dictsort ' +
      'dictsortreversed default_if_none pluralize lower join center default ' +
      'truncatewords_html upper length phone2numeric wordwrap time addslashes slugify first ' +
      'escapejs force_escape iriencode last safe safeseq truncatechars localize unlocalize ' +
      'localtime utc timezone',
    contains: [
      {className: 'argument', begin: /"/, end: /"/},
      {className: 'argument', begin: /'/, end: /'/}
    ]
  };

  return {
    case_insensitive: true,
    subLanguage: 'xml', subLanguageMode: 'continuous',
    contains: [
      {
        className: 'template_comment',
        begin: /\{%\s*comment\s*%}/, end: /\{%\s*endcomment\s*%}/
      },
      {
        className: 'template_comment',
        begin: /\{#/, end: /#}/
      },
      {
        className: 'template_tag',
        begin: /\{%/, end: /%}/,
        keywords:
          'comment endcomment load templatetag ifchanged endifchanged if endif firstof for ' +
          'endfor in ifnotequal endifnotequal widthratio extends include spaceless ' +
          'endspaceless regroup by as ifequal endifequal ssi now with cycle url filter ' +
          'endfilter debug block endblock else autoescape endautoescape csrf_token empty elif ' +
          'endwith static trans blocktrans endblocktrans get_static_prefix get_media_prefix ' +
          'plural get_current_language language get_available_languages ' +
          'get_current_language_bidi get_language_info get_language_info_list localize ' +
          'endlocalize localtime endlocaltime timezone endtimezone get_current_timezone ' +
          'verbatim',
        contains: [FILTER]
      },
      {
        className: 'variable',
        begin: /\{\{/, end: /}}/,
        contains: [FILTER]
      }
    ]
  };
};