$(document).ready(function () {
  var engine, remoteHost, template, empty;

  $.support.cors = true;

  remoteHost = 'https://typeahead-js-twitter-api-proxy.herokuapp.com';
  template = Handlebars.compile($(".result-template").html());
  empty = Handlebars.compile($(".empty-template").html());

  engine = new Bloodhound({
    identify: function (o) { return o.id_str; },
    queryTokenizer: Bloodhound.tokenizers.whitespace,
    datumTokenizer: Bloodhound.tokenizers.obj.whitespace('name', 'screen_name'),
    dupDetector: function (a, b) { return a.id_str === b.id_str; },
    prefetch: remoteHost + '/demo/prefetch',
    remote: {
      url: remoteHost + '/demo/search?q=%QUERY',
      wildcard: '%QUERY'
    }
  });

  // ensure default users are read on initialization
  engine.get('1090217586', '58502284', '10273252', '24477185')

  function engineWithDefaults(q, sync, async) {
    if (q === '') {
      sync(engine.get('1090217586', '58502284', '10273252', '24477185'));
      async([]);
    }

    else {
      engine.search(q, sync, async);
    }
  }

  $('.demo-input').typeahead({
    hint: $('.Typeahead-hint'),
    menu: $('.Typeahead-menu'),
    minLength: 0,
    classNames: {
      open: 'is-open',
      empty: 'is-empty',
      cursor: 'is-active',
      suggestion: 'Typeahead-suggestion',
      selectable: 'Typeahead-selectable'
    }
  }, {
    source: engineWithDefaults,
    displayKey: 'screen_name',
    templates: {
      suggestion: template,
      empty: empty
    }
  })
    .on('typeahead:asyncrequest', function () {
      $('.Typeahead-spinner').show();
    })
    .on('typeahead:asynccancel typeahead:asyncreceive', function () {
      $('.Typeahead-spinner').hide();
    });

});