/*
Language: Microtik RouterOS script
Author: Ivan Dementev <ivan_div@mail.ru>
Description: Scripting host provides a way to automate some router maintenance tasks by means of executing user-defined scripts bounded to some event occurrence
Website: https://wiki.mikrotik.com/wiki/Manual:Scripting
*/

// Colors from RouterOS terminal:
//   green        - #0E9A00
//   teal         - #0C9A9A
//   purple       - #99069A
//   light-brown  - #9A9900

export default function(hljs) {
  const STATEMENTS = 'foreach do while for if from to step else on-error and or not in';

  // Global commands: Every global command should start with ":" token, otherwise it will be treated as variable.
  const GLOBAL_COMMANDS = 'global local beep delay put len typeof pick log time set find environment terminal error execute parse resolve toarray tobool toid toip toip6 tonum tostr totime';

  // Common commands: Following commands available from most sub-menus:
  const COMMON_COMMANDS = 'add remove enable disable set get print export edit find run debug error info warning';

  const LITERALS = 'true false yes no nothing nil null';

  const OBJECTS = 'traffic-flow traffic-generator firewall scheduler aaa accounting address-list address align area bandwidth-server bfd bgp bridge client clock community config connection console customer default dhcp-client dhcp-server discovery dns e-mail ethernet filter firmware gps graphing group hardware health hotspot identity igmp-proxy incoming instance interface ip ipsec ipv6 irq l2tp-server lcd ldp logging mac-server mac-winbox mangle manual mirror mme mpls nat nd neighbor network note ntp ospf ospf-v3 ovpn-server page peer pim ping policy pool port ppp pppoe-client pptp-server prefix profile proposal proxy queue radius resource rip ripng route routing screen script security-profiles server service service-port settings shares smb sms sniffer snmp snooper socks sstp-server system tool tracking type upgrade upnp user-manager users user vlan secret vrrp watchdog web-access wireless pptp pppoe lan wan layer7-protocol lease simple raw';

  // print parameters
  // Several parameters are available for print command:
  // ToDo: var PARAMETERS_PRINT = 'append as-value brief detail count-only file follow follow-only from interval terse value-list without-paging where info';
  // ToDo: var OPERATORS = '&& and ! not || or in ~ ^ & << >> + - * /';
  // ToDo: var TYPES = 'num number bool boolean str string ip ip6-prefix id time array';
  // ToDo: The following tokens serve as delimiters in the grammar: ()  []  {}  :   ;   $   /

  const VAR_PREFIX = 'global local set for foreach';

  const VAR = {
    className: 'variable',
    variants: [
      { begin: /\$[\w\d#@][\w\d_]*/ },
      { begin: /\$\{(.*?)\}/ }
    ]
  };

  const QUOTE_STRING = {
    className: 'string',
    begin: /"/,
    end: /"/,
    contains: [
      hljs.BACKSLASH_ESCAPE,
      VAR,
      {
        className: 'variable',
        begin: /\$\(/,
        end: /\)/,
        contains: [ hljs.BACKSLASH_ESCAPE ]
      }
    ]
  };

  const APOS_STRING = {
    className: 'string',
    begin: /'/,
    end: /'/
  };

  const IPADDR = '((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\b';
  const IPADDR_wBITMASK = IPADDR + '/(3[0-2]|[1-2][0-9]|\\d)';

  return {
    name: 'Microtik RouterOS script',
    aliases: [ 'mikrotik' ],
    case_insensitive: true,
    keywords: {
      $pattern: /:?[\w-]+/,
      literal: LITERALS,
      keyword: STATEMENTS + ' :' + STATEMENTS.split(' ').join(' :') + ' :' + GLOBAL_COMMANDS.split(' ').join(' :')
    },
    contains: [
      { // illegal syntax
        variants: [
          { // -- comment
            begin: /\/\*/,
            end: /\*\//
          },
          { // Stan comment
            begin: /\/\//,
            end: /$/
          },
          { // HTML tags
            begin: /<\//,
            end: />/
          }
        ],
        illegal: /./
      },
      hljs.COMMENT('^#', '$'),
      QUOTE_STRING,
      APOS_STRING,
      VAR,
      // attribute=value
      {
        // > is to avoid matches with => in other grammars
        begin: /[\w-]+=([^\s{}[\]()>]+)/,
        relevance: 0,
        returnBegin: true,
        contains: [
          {
            className: 'attribute',
            begin: /[^=]+/
          },
          {
            begin: /=/,
            endsWithParent: true,
            relevance: 0,
            contains: [
              QUOTE_STRING,
              APOS_STRING,
              VAR,
              {
                className: 'literal',
                begin: '\\b(' + LITERALS.split(' ').join('|') + ')\\b'
              },
              {
                // Do not format unclassified values. Needed to exclude highlighting of values as built_in.
                begin: /("[^"]*"|[^\s{}[\]]+)/ }
              /*
              {
                // IPv4 addresses and subnets
                className: 'number',
                variants: [
                  {begin: IPADDR_wBITMASK+'(,'+IPADDR_wBITMASK+')*'}, //192.168.0.0/24,1.2.3.0/24
                  {begin: IPADDR+'-'+IPADDR},       // 192.168.0.1-192.168.0.3
                  {begin: IPADDR+'(,'+IPADDR+')*'}, // 192.168.0.1,192.168.0.34,192.168.24.1,192.168.0.1
                ]
              },
              {
                // MAC addresses and DHCP Client IDs
                className: 'number',
                begin: /\b(1:)?([0-9A-Fa-f]{1,2}[:-]){5}([0-9A-Fa-f]){1,2}\b/,
              },
              */
            ]
          }
        ]
      },
      {
        // HEX values
        className: 'number',
        begin: /\*[0-9a-fA-F]+/
      },
      {
        begin: '\\b(' + COMMON_COMMANDS.split(' ').join('|') + ')([\\s[(\\]|])',
        returnBegin: true,
        contains: [
          {
            className: 'built_in', // 'function',
            begin: /\w+/
          }
        ]
      },
      {
        className: 'built_in',
        variants: [
          { begin: '(\\.\\./|/|\\s)((' + OBJECTS.split(' ').join('|') + ');?\\s)+' },
          {
            begin: /\.\./,
            relevance: 0
          }
        ]
      }
    ]
  };
}