/**
 * Try to get door info
 */

const redis = require('redis');

function doorStatusKey(id) {
  return concatKeys("doors", id, 'open');
}

function concatKeys(...keys) {
  return keys.join(':');
}

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

  let door = event.door || context.DEFAULT_DOOR;

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

  const timeout = context['OPEN_TIMEOUT_' + door.toUpperCase()] || 60;

  let client = redis.createClient({ url: context.REDIS_CONNECT_URL });
  client.connect()
    .then(async () => {
      const status = await client.get(doorStatusKey(door)) ? "OPEN": "CLOSED";
      await client.quit();

      response
        .setStatusCode(200)
        .appendHeader('Content-Type', 'application/json')
        .setBody({ id: door, timeout, status });

      return callback(null, response);
    });
};