import { MongoClient, MongoClientOptions } from 'mongodb';

const MONGOHOST = process.env.MONGOHOST || 'localhost';
const MONGOPORT = process.env.MONGOPORT || '27017';
const MONGOAUTH = process.env.MONGOAUTH === 'true';
const MONGOUSRP = process.env.MONGOUSRP || '';
export const MONGOBASE = process.env.MONGOBASE || 'medizin';

const MONGO_URL = MONGOAUTH
  ? `mongodb://${MONGOUSRP}@${MONGOHOST}:${MONGOPORT}/?authSource=admin`
  : `mongodb://${MONGOHOST}:${MONGOPORT}`;

  console.log("auth:", MONGOAUTH, "url:", MONGO_URL)
const options: MongoClientOptions = {};

let client: MongoClient;
let clientPromise: Promise<MongoClient>;

declare global {
  // eslint-disable-next-line no-var
  var _mongoClientPromise: Promise<MongoClient> | undefined;
}

if (process.env.NODE_ENV === 'development') {
  // In development, use a global variable to preserve the connection across HMR reloads
  if (!global._mongoClientPromise) {
    client = new MongoClient(MONGO_URL, options);
    global._mongoClientPromise = client.connect();
  }
  clientPromise = global._mongoClientPromise;
} else {
  client = new MongoClient(MONGO_URL, options);
  clientPromise = client.connect();
}

export default clientPromise;