const MongoClient = require("mongodb").MongoClient;

function getData(db, collectionName, counter) {  
  console.log(`Start fetching ${collectionName} ${counter} `);  
  return db.collection(collectionName).find({}).toArray().then((data) =>       console.log(`${collectionName} ${counter}: ${data.length}`)
  );
}

async function run() {  
  const client = await MongoClient.connect(
  "mongodb://localhost:27017/gastromatic_develop",    
  {
    useNewUrlParser: true,
    useUnifiedTopology: false,
    autoEncryption: {
      keyVaultNamespace: "encryption.__keyVault",        
      kmsProviders: {...},
      extraOptions: {
        mongocryptdBypassSpawn: true,
        mongocryptdURI: "mongodb://%2Ftmp%2Fmongocryptd.sock",
      },
     },    
  });
  const db = client.db();  
  const counter = 20;
  const promises = [];
  for (let i = 0; i < counter; i++) {
     promises.push(getData(db, "Employees", i + 1));  
  }  
  await Promise.all(promises);
}

run()
  .catch((err) => console.error(err))
  .then(() => {    
    console.log("Finished");    
    process.exit()  
  });