// Copyright 2020 The AMPHTML Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import config from '../../../platform/config/shared.json';
import modes from '../modes/';

class Analytics {
  constructor() {
    if (modes.IS_EMBED) {
      return;
    }

    window.dataLayer = window.dataLayer || [];
    function gtag() {
      // eslint-disable-next-line prefer-rest-params
      dataLayer.push(arguments);
    }
    gtag('js', new Date());
    gtag('config', config.gaTrackingId, {'use_amp_client_id': true});
  }
}

export default new Analytics();
