(function (global) {

  var index = lunr(function () {
    this.ref('id');
    this.field('title', { boost: 10 });
    // this.field('tags', { boost: 100 });
    this.field('body');
  });

  $(populate);
  $(bind);

  function populate () {
    $('h1').each(function () {
      var title = $(this);
      var body = title.nextUntil('h1');
      var wrapper = $('<section id="section-' + title.prop('id') + '"></section>');

      title.after(wrapper.append(body));
      wrapper.prepend(title);

      index.add({
        id: title.prop('id'),
        title: title.text(),
        // tags: tags,
        body: body.text()
      });
    });
  }

  function bind () {
    $('#input-search').on('keyup', function () {
      if (this.value) {
        var items = index.search(this.value);
        $('section, #toc .tocify-item').hide();
        items.forEach(function (item) {
          $('#section-' + item.ref + ', .tocify-item[data-unique=' + item.ref).show();
        });
      } else {
        $('section, #toc .tocify-item').show();
      }
    });
  }

})(window);