// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

/**
 * @fileoverview Contains a simple factory for creating and opening usbGnubby
 * instances.
 */
'use strict';

/**
 * @param {Gnubbies} gnubbies Gnubbies singleton instance
 * @constructor
 * @implements {GnubbyFactory}
 */
function UsbGnubbyFactory(gnubbies) {
  /** @private {Gnubbies} */
  this.gnubbies_ = gnubbies;
  usbGnubby.setGnubbies(gnubbies);
}

/**
 * Creates a new gnubby object, and opens the gnubby with the given index.
 * @param {llGnubbyDeviceId} which The device to open.
 * @param {boolean} forEnroll Whether this gnubby is being opened for enrolling.
 * @param {function(number, usbGnubby=)} cb Called with result of opening the
 *     gnubby.
 * @param {string=} logMsgUrl the url to post log messages to
 * @override
 */
UsbGnubbyFactory.prototype.openGnubby =
    function(which, forEnroll, cb, logMsgUrl) {
  var gnubby = new usbGnubby();
  gnubby.open(which, function(rc) {
    cb(rc, gnubby);
  });
};

/**
 * Enumerates gnubbies.
 * @param {function(number, Array.<llGnubbyDeviceId>)} cb Enumerate callback
 */
UsbGnubbyFactory.prototype.enumerate = function(cb) {
  this.gnubbies_.enumerate(cb);
};