// Copyright 2018 The Distill Template Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import ymlParse from 'js-yaml';

export default function(dom, data) {
  let localData = {};
  let el = dom.querySelector('script[type="text/front-matter"]');
  if (el) {
    let text = el.textContent;
    localData = ymlParse.safeLoad(text);
  }

  data.title = localData.title ? localData.title : 'Untitled';
  data.description = localData.description ? localData.description : 'No description.';

  data.authors = localData.authors ? localData.authors : [];

  data.authors = data.authors.map((author, i) =>{
    let a = {};
    let name = Object.keys(author)[0];
    if ((typeof author) === 'string') {
      name = author;
    } else {
      a.personalURL = author[name];
    }
    let names = name.split(' ');
    a.name = name;
    a.firstName = names.slice(0, names.length - 1).join(' ');
    a.lastName = names[names.length -1];
    if(localData.affiliations[i]) {
      let affiliation = Object.keys(localData.affiliations[i])[0];
      if ((typeof localData.affiliations[i]) === 'string') {
        affiliation = localData.affiliations[i];
      } else {
        a.affiliationURL = localData.affiliations[i][affiliation];
      }
      a.affiliation = affiliation;
    }
    return a;
  });
  

}