(function() {

  'use strict';
  /* global MozActivity, Promise, Provider, Search */

  function Contacts() {
  }

  Contacts.prototype = {

    __proto__: Provider.prototype,

    name: 'Contacts',

    click: function(e) {
      var target = e.target;

      Search.close();
      /* jshint nonew: false */
      new MozActivity({
        name: 'open',
        data: {
          type: 'webcontacts/contact',
          params: {
            'id': target.dataset.contactId
          }
        }
      });
    },

    search: function(input) {
      return new Promise((resolve, reject) => {
        var options = {
          filterValue: input,
          filterBy: ['givenName'],
          filterOp: 'startsWith'
        };

        this.clear();

        var request = navigator.mozContacts.find(options);
        request.onsuccess = (function() {
          var results = request.result;
          if (!results.length) {
            return reject();
          }

          var renderResults = [];
          for (var i = 0; i < results.length; i++) {
            var result = results[i];
            for (var j = 0; j < result.name.length; j++) {
              var renderObj = {
                title: result.name[j],
                dataset: {
                  contactId: result.id
                }
              };

              if (result.photo) {
                renderObj.icon = result.photo[0];
              }

              renderResults.push(renderObj);
            }
          }
          resolve(renderResults);
        }).bind(this);

        request.onerror = function() {
        };
      });
    }
  };

  Search.provider(new Contacts());

}());