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// CodeMirror, copyright (c) by Marijn Haverbeke and others
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// Distributed under an MIT license: https://codemirror.net/LICENSE
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(function(mod) {
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  if (typeof exports == "object" && typeof module == "object") // CommonJS
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    mod(require("../../lib/codemirror"), require("../markdown/markdown"), require("../../addon/mode/overlay"));
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  else if (typeof define == "function" && define.amd) // AMD
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    define(["../../lib/codemirror", "../markdown/markdown", "../../addon/mode/overlay"], mod);
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  else // Plain browser env
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    mod(CodeMirror);
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})(function(CodeMirror) {
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"use strict";
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var urlRE = /^((?:(?:aaas?|about|acap|adiumxtra|af[ps]|aim|apt|attachment|aw|beshare|bitcoin|bolo|callto|cap|chrome(?:-extension)?|cid|coap|com-eventbrite-attendee|content|crid|cvs|data|dav|dict|dlna-(?:playcontainer|playsingle)|dns|doi|dtn|dvb|ed2k|facetime|feed|file|finger|fish|ftp|geo|gg|git|gizmoproject|go|gopher|gtalk|h323|hcp|https?|iax|icap|icon|im|imap|info|ipn|ipp|irc[6s]?|iris(?:\.beep|\.lwz|\.xpc|\.xpcs)?|itms|jar|javascript|jms|keyparc|lastfm|ldaps?|magnet|mailto|maps|market|message|mid|mms|ms-help|msnim|msrps?|mtqp|mumble|mupdate|mvn|news|nfs|nih?|nntp|notes|oid|opaquelocktoken|palm|paparazzi|platform|pop|pres|proxy|psyc|query|res(?:ource)?|rmi|rsync|rtmp|rtsp|secondlife|service|session|sftp|sgn|shttp|sieve|sips?|skype|sm[bs]|snmp|soap\.beeps?|soldat|spotify|ssh|steam|svn|tag|teamspeak|tel(?:net)?|tftp|things|thismessage|tip|tn3270|tv|udp|unreal|urn|ut2004|vemmi|ventrilo|view-source|webcal|wss?|wtai|wyciwyg|xcon(?:-userid)?|xfire|xmlrpc\.beeps?|xmpp|xri|ymsgr|z39\.50[rs]?):(?:\/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}\/)(?:[^\s()<>]|\([^\s()<>]*\))+(?:\([^\s()<>]*\)|[^\s`*!()\[\]{};:'".,<>?«»“”‘’]))/i
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CodeMirror.defineMode("gfm", function(config, modeConfig) {
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  var codeDepth = 0;
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  function blankLine(state) {
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    state.code = false;
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    return null;
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  }
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  var gfmOverlay = {
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    startState: function() {
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      return {
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        code: false,
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        codeBlock: false,
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        ateSpace: false
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      };
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    },
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    copyState: function(s) {
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      return {
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        code: s.code,
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        codeBlock: s.codeBlock,
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        ateSpace: s.ateSpace
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      };
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    },
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    token: function(stream, state) {
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      state.combineTokens = null;
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      // Hack to prevent formatting override inside code blocks (block and inline)
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      if (state.codeBlock) {
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        if (stream.match(/^```+/)) {
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          state.codeBlock = false;
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          return null;
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        }
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        stream.skipToEnd();
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        return null;
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      }
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      if (stream.sol()) {
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        state.code = false;
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      }
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      if (stream.sol() && stream.match(/^```+/)) {
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        stream.skipToEnd();
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        state.codeBlock = true;
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        return null;
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      }
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      // If this block is changed, it may need to be updated in Markdown mode
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      if (stream.peek() === '`') {
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        stream.next();
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        var before = stream.pos;
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        stream.eatWhile('`');
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        var difference = 1 + stream.pos - before;
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        if (!state.code) {
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          codeDepth = difference;
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          state.code = true;
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        } else {
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          if (difference === codeDepth) { // Must be exact
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            state.code = false;
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          }
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        }
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        return null;
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      } else if (state.code) {
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        stream.next();
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        return null;
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      }
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      // Check if space. If so, links can be formatted later on
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      if (stream.eatSpace()) {
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        state.ateSpace = true;
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        return null;
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      }
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      if (stream.sol() || state.ateSpace) {
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        state.ateSpace = false;
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        if (modeConfig.gitHubSpice !== false) {
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          if(stream.match(/^(?:[a-zA-Z0-9\-_]+\/)?(?:[a-zA-Z0-9\-_]+@)?(?=.{0,6}\d)(?:[a-f0-9]{7,40}\b)/)) {
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            // User/Project@SHA
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            // User@SHA
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            // SHA
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            state.combineTokens = true;
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            return "link";
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          } else if (stream.match(/^(?:[a-zA-Z0-9\-_]+\/)?(?:[a-zA-Z0-9\-_]+)?#[0-9]+\b/)) {
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            // User/Project#Num
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            // User#Num
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            // #Num
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            state.combineTokens = true;
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            return "link";
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          }
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        }
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      }
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      if (stream.match(urlRE) &&
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          stream.string.slice(stream.start - 2, stream.start) != "](" &&
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          (stream.start == 0 || /\W/.test(stream.string.charAt(stream.start - 1)))) {
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        // URLs
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        // Taken from http://daringfireball.net/2010/07/improved_regex_for_matching_urls
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        // And then (issue #1160) simplified to make it not crash the Chrome Regexp engine
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        // And then limited url schemes to the CommonMark list, so foo:bar isn't matched as a URL
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        state.combineTokens = true;
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        return "link";
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      }
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      stream.next();
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      return null;
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    },
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    blankLine: blankLine
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  };
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  var markdownConfig = {
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    taskLists: true,
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    strikethrough: true,
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    emoji: true
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  };
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  for (var attr in modeConfig) {
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    markdownConfig[attr] = modeConfig[attr];
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  }
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  markdownConfig.name = "markdown";
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  return CodeMirror.overlayMode(CodeMirror.getMode(config, markdownConfig), gfmOverlay);
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}, "markdown");
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  CodeMirror.defineMIME("text/x-gfm", "gfm");
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});
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