// @flow
import * as React from 'react';
import { render } from 'react-dom';
import { Provider } from 'mobx-react';
import { BrowserRouter as Router } from 'react-router-dom';
import stores from 'stores';
import 'shared/styles/prism.css';

import ErrorBoundary from 'components/ErrorBoundary';
import ScrollToTop from 'components/ScrollToTop';
import Toasts from 'components/Toasts';
import Theme from 'components/Theme';
import Routes from './routes';

let DevTools;
if (__DEV__) {
  DevTools = require('mobx-react-devtools').default; // eslint-disable-line global-require
}

const element = document.getElementById('root');

if (element) {
  render(
    <React.Fragment>
      <ErrorBoundary>
        <Provider {...stores}>
          <Theme>
            <Router>
              <React.Fragment>
                <ScrollToTop>
                  <Routes />
                </ScrollToTop>
                <Toasts />
              </React.Fragment>
            </Router>
          </Theme>
        </Provider>
      </ErrorBoundary>
      {DevTools && <DevTools position={{ bottom: 0, right: 0 }} />}
    </React.Fragment>,
    element
  );
}

window.addEventListener('load', async () => {
  // installation does not use Google Analytics, or tracking is blocked on client
  // no point loading the rest of the analytics bundles
  if (!process.env.GOOGLE_ANALYTICS_ID || !window.ga) return;

  // https://github.com/googleanalytics/autotrack/issues/137#issuecomment-305890099
  await import('autotrack/autotrack.js');

  window.ga('require', 'outboundLinkTracker');
  window.ga('require', 'urlChangeTracker');
});