// AuthHandler.js

/*
 * Functions
 */

module.exports.me = (event, context) => {
  context.callbackWaitsForEmptyEventLoop = false;
  return connectToDatabase()
    .then(() =>
      me(event.requestContext.authorizer.principalId) // the decoded.id from the VerifyToken.auth will be passed along as the principalId under the authorizer
    )
    .then(session => ({
      statusCode: 200,
      body: JSON.stringify(session)
    }))
    .catch(err => ({
      statusCode: err.statusCode || 500,
      headers: { 'Content-Type': 'text/plain' },
      body: { stack: err.stack, message: err.message }
    }));
};

/*
 * Helpers
 */

function me(userId) {
  return User.findById(userId, { password: 0 })
    .then(user =>
      !user
        ? Promise.reject('No user found.')
        : user
    )
    .catch(err => Promise.reject(new Error(err)));
}