const mongoClient = require('mongodb').MongoClient

let log = console.log.bind(this)
log.error = console.error.bind(this)

const databaseInfo = {
  host: 'host',
  port: 'port',
  user: 'username',
  pass: 'password',
  db: 'database',
  collection: 'collection',
  get url () {
    return `mongodb://${this.user}:${this.pass}@${this.host}:${this.port}/${this.db}`
  }
}

const MONGO_URL = databaseInfo.url
const COLLECTION = databaseInfo.collection

const connection = (url) => {
  return new Promise((resolve, reject) => {
    try {
      mongoClient.connect(url, (err, db) => {
        if (err) {
          reject(err)
        }

        resolve(db)
      })
    } catch (err) {
      reject(err)
    }
  })
}

connection(MONGO_URL)
  .then(db => {
    db.collection(COLLECTION).find({}).toArray()
      .then(data => log(data))
      .catch(err => log.error(err))

    db.close()
  })
  .catch(err => log.error(err))

// module.exports = connection(MONGO_URL)