import auth from '~/utils/auth';

// do not add trailing slashes to the excluded paths.
const excludedPaths = ['', '/authorize', '/logout'];

// This function is not SSR-compatible, and works since our code currently only runs on the client.
export default function ({ isHMR, route }) {
  // If middleware is called from hot module replacement, ignore it
  if (isHMR) {
    return;
  }

  // support both trailing slash and non-trailing slash so it works the same
  // when hosted from s3 and not.
  let path = route.path;
  if (path.endsWith('/')) {
    path = path.slice(0, -1);
  }

  if (!excludedPaths.includes(path)) {
    if (auth.isExpired()) {
      // if the auth has just expired - try to log in silently.
      auth.triggerSilentLogin({ returnUrl: route.fullPath });
    }
    else if (!auth.isAuthenticated()) {
      // otherwise, if the user is not authenticated, trigger a full login.
      auth.triggerLogin({ returnUrl: route.fullPath });
    }
  }
}