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// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"), require("../python/python"), require("../stex/stex"), require("../../addon/mode/overlay"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror", "../python/python", "../stex/stex", "../../addon/mode/overlay"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

CodeMirror.defineMode('rst', function (config, options) {

  var rx_strong = /^\*\*[^\*\s](?:[^\*]*[^\*\s])?\*\*/;
  var rx_emphasis = /^\*[^\*\s](?:[^\*]*[^\*\s])?\*/;
  var rx_literal = /^``[^`\s](?:[^`]*[^`\s])``/;

  var rx_number = /^(?:[\d]+(?:[\.,]\d+)*)/;
  var rx_positive = /^(?:\s\+[\d]+(?:[\.,]\d+)*)/;
  var rx_negative = /^(?:\s\-[\d]+(?:[\.,]\d+)*)/;

  var rx_uri_protocol = "[Hh][Tt][Tt][Pp][Ss]?://";
  var rx_uri_domain = "(?:[\\d\\w.-]+)\\.(?:\\w{2,6})";
  var rx_uri_path = "(?:/[\\d\\w\\#\\%\\&\\-\\.\\,\\/\\:\\=\\?\\~]+)*";
  var rx_uri = new RegExp("^" + rx_uri_protocol + rx_uri_domain + rx_uri_path);

  var overlay = {
    token: function (stream) {

      if (stream.match(rx_strong) && stream.match (/\W+|$/, false))
        return 'strong';
      if (stream.match(rx_emphasis) && stream.match (/\W+|$/, false))
        return 'em';
      if (stream.match(rx_literal) && stream.match (/\W+|$/, false))
        return 'string-2';
      if (stream.match(rx_number))
        return 'number';
      if (stream.match(rx_positive))
        return 'positive';
      if (stream.match(rx_negative))
        return 'negative';
      if (stream.match(rx_uri))
        return 'link';

      while (stream.next() != null) {
        if (stream.match(rx_strong, false)) break;
        if (stream.match(rx_emphasis, false)) break;
        if (stream.match(rx_literal, false)) break;
        if (stream.match(rx_number, false)) break;
        if (stream.match(rx_positive, false)) break;
        if (stream.match(rx_negative, false)) break;
        if (stream.match(rx_uri, false)) break;
      }

      return null;
    }
  };

  var mode = CodeMirror.getMode(
    config, options.backdrop || 'rst-base'
  );

  return CodeMirror.overlayMode(mode, overlay, true); // combine
}, 'python', 'stex');

///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////

CodeMirror.defineMode('rst-base', function (config) {

  ///////////////////////////////////////////////////////////////////////////
  ///////////////////////////////////////////////////////////////////////////

  function format(string) {
    var args = Array.prototype.slice.call(arguments, 1);
    return string.replace(/{(\d+)}/g, function (match, n) {
      return typeof args[n] != 'undefined' ? args[n] : match;
    });
  }

  ///////////////////////////////////////////////////////////////////////////
  ///////////////////////////////////////////////////////////////////////////

  var mode_python = CodeMirror.getMode(config, 'python');
  var mode_stex = CodeMirror.getMode(config, 'stex');

  ///////////////////////////////////////////////////////////////////////////
  ///////////////////////////////////////////////////////////////////////////

  var SEPA = "\\s+";
  var TAIL = "(?:\\s*|\\W|$)",
  rx_TAIL = new RegExp(format('^{0}', TAIL));

  var NAME =
    "(?:[^\\W\\d_](?:[\\w!\"#$%&'()\\*\\+,\\-\\.\/:;<=>\\?]*[^\\W_])?)",
  rx_NAME = new RegExp(format('^{0}', NAME));
  var NAME_WWS =
    "(?:[^\\W\\d_](?:[\\w\\s!\"#$%&'()\\*\\+,\\-\\.\/:;<=>\\?]*[^\\W_])?)";
  var REF_NAME = format('(?:{0}|`{1}`)', NAME, NAME_WWS);

  var TEXT1 = "(?:[^\\s\\|](?:[^\\|]*[^\\s\\|])?)";
  var TEXT2 = "(?:[^\\`]+)",
  rx_TEXT2 = new RegExp(format('^{0}', TEXT2));

  var rx_section = new RegExp(
    "^([!'#$%&\"()*+,-./:;<=>?@\\[\\\\\\]^_`{|}~])\\1{3,}\\s*$");
  var rx_explicit = new RegExp(
    format('^\\.\\.{0}', SEPA));
  var rx_link = new RegExp(
    format('^_{0}:{1}|^__:{1}', REF_NAME, TAIL));
  var rx_directive = new RegExp(
    format('^{0}::{1}', REF_NAME, TAIL));
  var rx_substitution = new RegExp(
    format('^\\|{0}\\|{1}{2}::{3}', TEXT1, SEPA, REF_NAME, TAIL));
  var rx_footnote = new RegExp(
    format('^\\[(?:\\d+|#{0}?|\\*)]{1}', REF_NAME, TAIL));
  var rx_citation = new RegExp(
    format('^\\[{0}\\]{1}', REF_NAME, TAIL));

  var rx_substitution_ref = new RegExp(
    format('^\\|{0}\\|', TEXT1));
  var rx_footnote_ref = new RegExp(
    format('^\\[(?:\\d+|#{0}?|\\*)]_', REF_NAME));