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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("../xml/xml"), require("../javascript/javascript"), require("../css/css"));
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  else if (typeof define == "function" && define.amd) // AMD
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    define(["../../lib/codemirror", "../xml/xml", "../javascript/javascript", "../css/css"], 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 defaultTags = {
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    script: [
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      ["lang", /(javascript|babel)/i, "javascript"],
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      ["type", /^(?:text|application)\/(?:x-)?(?:java|ecma)script$|^module$|^$/i, "javascript"],
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      ["type", /./, "text/plain"],
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      [null, null, "javascript"]
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    ],
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    style:  [
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      ["lang", /^css$/i, "css"],
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      ["type", /^(text\/)?(x-)?(stylesheet|css)$/i, "css"],
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      ["type", /./, "text/plain"],
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      [null, null, "css"]
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    ]
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  };
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  function maybeBackup(stream, pat, style) {
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    var cur = stream.current(), close = cur.search(pat);
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    if (close > -1) {
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      stream.backUp(cur.length - close);
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    } else if (cur.match(/<\/?$/)) {
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      stream.backUp(cur.length);
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      if (!stream.match(pat, false)) stream.match(cur);
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    }
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    return style;
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  }
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  var attrRegexpCache = {};
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  function getAttrRegexp(attr) {
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    var regexp = attrRegexpCache[attr];
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    if (regexp) return regexp;
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    return attrRegexpCache[attr] = new RegExp("\\s+" + attr + "\\s*=\\s*('|\")?([^'\"]+)('|\")?\\s*");
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  }
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  function getAttrValue(text, attr) {
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    var match = text.match(getAttrRegexp(attr))
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    return match ? /^\s*(.*?)\s*$/.exec(match[2])[1] : ""
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  }
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  function getTagRegexp(tagName, anchored) {
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    return new RegExp((anchored ? "^" : "") + "<\/\s*" + tagName + "\s*>", "i");
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  }
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  function addTags(from, to) {
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    for (var tag in from) {
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      var dest = to[tag] || (to[tag] = []);
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      var source = from[tag];
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      for (var i = source.length - 1; i >= 0; i--)
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        dest.unshift(source[i])
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    }
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  }
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  function findMatchingMode(tagInfo, tagText) {
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    for (var i = 0; i < tagInfo.length; i++) {
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      var spec = tagInfo[i];
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      if (!spec[0] || spec[1].test(getAttrValue(tagText, spec[0]))) return spec[2];
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    }
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  }
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  CodeMirror.defineMode("htmlmixed", function (config, parserConfig) {
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    var htmlMode = CodeMirror.getMode(config, {
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      name: "xml",
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      htmlMode: true,
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      multilineTagIndentFactor: parserConfig.multilineTagIndentFactor,
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      multilineTagIndentPastTag: parserConfig.multilineTagIndentPastTag,
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      allowMissingTagName: parserConfig.allowMissingTagName,
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    });
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    var tags = {};
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    var configTags = parserConfig && parserConfig.tags, configScript = parserConfig && parserConfig.scriptTypes;
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    addTags(defaultTags, tags);
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    if (configTags) addTags(configTags, tags);
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    if (configScript) for (var i = configScript.length - 1; i >= 0; i--)
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      tags.script.unshift(["type", configScript[i].matches, configScript[i].mode])
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    function html(stream, state) {
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      var style = htmlMode.token(stream, state.htmlState), tag = /\btag\b/.test(style), tagName
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      if (tag && !/[<>\s\/]/.test(stream.current()) &&
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          (tagName = state.htmlState.tagName && state.htmlState.tagName.toLowerCase()) &&
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          tags.hasOwnProperty(tagName)) {
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        state.inTag = tagName + " "
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      } else if (state.inTag && tag && />$/.test(stream.current())) {
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        var inTag = /^([\S]+) (.*)/.exec(state.inTag)
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        state.inTag = null
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        var modeSpec = stream.current() == ">" && findMatchingMode(tags[inTag[1]], inTag[2])
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        var mode = CodeMirror.getMode(config, modeSpec)
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        var endTagA = getTagRegexp(inTag[1], true), endTag = getTagRegexp(inTag[1], false);
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        state.token = function (stream, state) {
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          if (stream.match(endTagA, false)) {
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            state.token = html;
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            state.localState = state.localMode = null;
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            return null;
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          }
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          return maybeBackup(stream, endTag, state.localMode.token(stream, state.localState));
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        };
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        state.localMode = mode;
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        state.localState = CodeMirror.startState(mode, htmlMode.indent(state.htmlState, "", ""));
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      } else if (state.inTag) {
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        state.inTag += stream.current()
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        if (stream.eol()) state.inTag += " "
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      }
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      return style;
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    };
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    return {
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      startState: function () {
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        var state = CodeMirror.startState(htmlMode);
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        return {token: html, inTag: null, localMode: null, localState: null, htmlState: state};
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      },
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      copyState: function (state) {
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        var local;
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        if (state.localState) {
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          local = CodeMirror.copyState(state.localMode, state.localState);
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        }
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        return {token: state.token, inTag: state.inTag,
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                localMode: state.localMode, localState: local,
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                htmlState: CodeMirror.copyState(htmlMode, state.htmlState)};
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      },
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      token: function (stream, state) {
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        return state.token(stream, state);
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      },
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      indent: function (state, textAfter, line) {
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        if (!state.localMode || /^\s*<\//.test(textAfter))
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          return htmlMode.indent(state.htmlState, textAfter, line);
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        else if (state.localMode.indent)
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          return state.localMode.indent(state.localState, textAfter, line);
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        else
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          return CodeMirror.Pass;
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      },
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      innerMode: function (state) {
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        return {state: state.localState || state.htmlState, mode: state.localMode || htmlMode};
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      }
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    };
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  }, "xml", "javascript", "css");
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  CodeMirror.defineMIME("text/html", "htmlmixed");
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});
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