/**
 * Try to update door status
 */

exports.handler = async function(context, event, callback) {
  const response = new Twilio.Response();

  const door = event.door;

  if (!door) {
    response.setStatusCode(400);
    return callback(null, response);
  }

  const ddbPath = Runtime.getFunctions()['common/ddb'].path;
  const ddb = require(ddbPath);

  const client = ddb.createDDBClient(context);

  await client.send(ddb.getLockStatusCommand(door))
    .then(async (lock) => {
      const isOpen = ddb.isLockOpen(lock);

      if (isOpen) {
        const fingerprint = JSON.parse(lock.Item.fingerprint.S);

        response
          .setStatusCode(200)
          .appendHeader('Content-Type', 'application/json')
          .setBody({
            status: "OPEN",
            fingerprint,
          });

        await client.send(ddb.clearLockStatusCommand(lock));
        return;
      }

      response
        .setStatusCode(401)
        .appendHeader('Content-Type', 'application/json')
        .setBody({
          status: "CLOSED", 
        });

    }).catch((e) => {
      console.log(e);
      response
        .setStatusCode(500)
        .appendHeader('Content-Type', 'application/json')
        .setBody({ err: e });
    });

  await client.destroy();
  return callback(null, response);
};