/* -*- Mode: js; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */

'use strict';

/* global ModalDialog */
/* global NotificationScreen */

(function(exports) {
  var CarrierInfoNotifier = {

    _sound: 'style/notifications/ringtones/notifier_firefox.opus',
    // A random starting point
    // that is unlikely to be used by other notifications
    _notificationId: 6000 + Math.floor(Math.random() * 999),
    start: function() {

      // CDMA record information
      navigator.mozSetMessageHandler('cdma-info-rec-received',
        this.showCDMA.bind(this));
    },

    showCDMA: function cin_showCDMA(message) {
      if (message.display) {
        this.show(message.display, 'cdma-record-info');
      }
      if (message.extendedDisplay) {
        var text = message.extendedDisplay.records.map(function(elem) {
          return elem.content;
        }).join(' ');
        this.show(text, 'cdma-record-info');
      }
    },

    show: function cin_show(message, title) {
      var showDialog = function cin_showDialog() {
        ModalDialog.showWithPseudoEvent({
          title: title,
          text: { raw: message },
          type: 'alert'
        });
      };

      // If we are not inside the lockscreen, show the dialog
      // immediately, dispatch an event to hide
      if (!window.Service.query('locked')) {
        this.dispatchEvent('emergencyalert');
        this.playNotification();
        showDialog();
        return;
      }

      // If we are on the lock screen then create a notification
      // that invokes the dialog
      var notificationId = ++this._notificationId;
      var notification = NotificationScreen.addNotification({
        id: notificationId,
        title: title,
        text: message
      });
      notification.addEventListener('tap', function showDialogAndDismiss() {
        showDialog();
        NotificationScreen.removeNotification(notificationId);
      });
    },

    playNotification: function cin_playNotification() {
      var ringtonePlayer = new Audio();
      ringtonePlayer.src = this._sound;
      ringtonePlayer.mozAudioChannelType = 'notification';
      ringtonePlayer.play();
      window.setTimeout(function smsRingtoneEnder() {
        ringtonePlayer.pause();
        ringtonePlayer.src = '';
      }, 2000);
    },

    dispatchEvent: function cin_dispatchEvent(name, detail) {
      var evt = document.createEvent('CustomEvent');
      evt.initCustomEvent(name, true, true, detail);
      window.dispatchEvent(evt);
    }
  };
  exports.CarrierInfoNotifier = CarrierInfoNotifier;
}(window));