polka()
  .use(
    "welcome",
    sirv('static', { dev }),
    sapper.middleware({
      session: (req) => ({
        cookie: req.headers.cookie,
        host: req.headers.host,
        ip: req.headers["X-Forwarded-For"] || req.connection.remoteAddress,
      })
    })
  )
  .listen(PORT, err => {
    if (err) console.log('error', err);
  });

export default sapper.middleware({
  session: req => {
    const cart = req.cookies.get('cart');
    let shipping;
    try {
      shipping = JSON.parse(
        querystring.unescape(
          Buffer.from(req.cookies.get('shipping'), 'base64').toString()
        )
      );
    } catch (e) {
      shipping = undefined;
    }
    const { token } = req;
    let userData;
    try {
      userData = token && JWT.decode(token);
    } catch (e) {
      userData = undefined;
    }

    return {
      location: req.cookies.get('location'),
      pickup: !!req.cookies.get('pickup'),
      userData,
      shipping,
      deviceId: req.deviceId,
      cart,
      token
    };
  }
});