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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"));
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  else if (typeof define == "function" && define.amd) // AMD
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    define(["../../lib/codemirror"], 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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CodeMirror.defineMode("yaml", function() {
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  var cons = ['true', 'false', 'on', 'off', 'yes', 'no'];
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  var keywordRegex = new RegExp("\\b(("+cons.join(")|(")+"))$", 'i');
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  return {
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    token: function(stream, state) {
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      var ch = stream.peek();
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      var esc = state.escaped;
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      state.escaped = false;
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      /* comments */
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      if (ch == "#" && (stream.pos == 0 || /\s/.test(stream.string.charAt(stream.pos - 1)))) {
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        stream.skipToEnd();
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        return "comment";
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      }
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      if (stream.match(/^('([^']|\\.)*'?|"([^"]|\\.)*"?)/))
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        return "string";
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      if (state.literal && stream.indentation() > state.keyCol) {
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        stream.skipToEnd(); return "string";
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      } else if (state.literal) { state.literal = false; }
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      if (stream.sol()) {
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        state.keyCol = 0;
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        state.pair = false;
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        state.pairStart = false;
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        /* document start */
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        if(stream.match('---')) { return "def"; }
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        /* document end */
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        if (stream.match('...')) { return "def"; }
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        /* array list item */
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        if (stream.match(/\s*-\s+/)) { return 'meta'; }
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      }
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      /* inline pairs/lists */
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      if (stream.match(/^(\{|\}|\[|\])/)) {
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        if (ch == '{')
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          state.inlinePairs++;
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        else if (ch == '}')
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          state.inlinePairs--;
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        else if (ch == '[')
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          state.inlineList++;
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        else
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          state.inlineList--;
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        return 'meta';
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      }
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      /* list separator */
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      if (state.inlineList > 0 && !esc && ch == ',') {
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        stream.next();
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        return 'meta';
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      }
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      /* pairs separator */
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      if (state.inlinePairs > 0 && !esc && ch == ',') {
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        state.keyCol = 0;
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        state.pair = false;
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        state.pairStart = false;
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        stream.next();
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        return 'meta';
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      }
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      /* start of value of a pair */
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      if (state.pairStart) {
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        /* block literals */
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        if (stream.match(/^\s*(\||\>)\s*/)) { state.literal = true; return 'meta'; };
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        /* references */
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        if (stream.match(/^\s*(\&|\*)[a-z0-9\._-]+\b/i)) { return 'variable-2'; }
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        /* numbers */
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        if (state.inlinePairs == 0 && stream.match(/^\s*-?[0-9\.\,]+\s?$/)) { return 'number'; }
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        if (state.inlinePairs > 0 && stream.match(/^\s*-?[0-9\.\,]+\s?(?=(,|}))/)) { return 'number'; }
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        /* keywords */
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        if (stream.match(keywordRegex)) { return 'keyword'; }
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      }
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      /* pairs (associative arrays) -> key */
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      if (!state.pair && stream.match(/^\s*(?:[,\[\]{}&*!|>'"%@`][^\s'":]|[^,\[\]{}#&*!|>'"%@`])[^#]*?(?=\s*:($|\s))/)) {
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        state.pair = true;
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        state.keyCol = stream.indentation();
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        return "atom";
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      }
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      if (state.pair && stream.match(/^:\s*/)) { state.pairStart = true; return 'meta'; }
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      /* nothing found, continue */
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      state.pairStart = false;
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      state.escaped = (ch == '\\');
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      stream.next();
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      return null;
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    },
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    startState: function() {
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      return {
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        pair: false,
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        pairStart: false,
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        keyCol: 0,
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        inlinePairs: 0,
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        inlineList: 0,
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        literal: false,
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        escaped: false
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      };
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    },
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    lineComment: "#",
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    fold: "indent"
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  };
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});
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CodeMirror.defineMIME("text/x-yaml", "yaml");
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CodeMirror.defineMIME("text/yaml", "yaml");
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});
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