/**
 * Try to get door info
 */

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

  let door = event.door;
  const buzzer = event.buzzer?.slice(-10);

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

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

  if (buzzer) {
    door = await client.send(ddb.getDoorAliasCommand(buzzer))
      .then(async (alias) => {
        if (!alias.Item) {
          response
            .setStatusCode(404)
            .appendHeader('Content-Type', 'application/json')
            .setBody({ err: "This buzzer is not registered" });
          return undefined;
        }
        return alias.Item.name.S;
      });
  }

  if (door) {
    const config = await client.send(ddb.getDoorConfigCommand(door));

    if (!config.Item) {
      response
        .setStatusCode(404)
        .appendHeader('Content-Type', 'application/json')
        .setBody({ err: "This buzzer is not registered properly" });
    } else {
      if (buzzer) {
        response
          .setStatusCode(200)
          .appendHeader('Content-Type', 'application/json')
          .setBody({ 
            buzzer,
            door,
            fallbackNumbers: config.Item.fallbackNumbers.SS,
          });
      } else {
        await client.send(ddb.getLockStatusCommand(door))
          .then(async (lock) => {
            const status = ddb.isLockOpen(lock) ? "OPEN": "CLOSED";
      
            response
              .setStatusCode(200)
              .appendHeader('Content-Type', 'application/json')
              .setBody({ id: door, timeout: config.Item.timeout.N, status, buzzerCode: config.Item.buzzerCode.S });
      
          }).catch((e) => {
            console.log(e);
            response
              .setStatusCode(500)
              .appendHeader('Content-Type', 'application/json')
              .setBody({ err: e });
          });
      }
    }
  }
  await client.destroy();
  return callback(null, response);
};