'use strict';

const mongodb = require('mongodb');

// MongoDB connection defaults
const OPTION_AUTO_RECONNECT = true;
const OPTION_SOCKET_OPTIONS = {
  keepAlive: 1,
  connectTimeoutMS: 30000
};
const POOL_SIZE = 10;
const DEFAULT_MONGODB_CONNECTION_OPTIONS = {
  server: {
    poolSize: POOL_SIZE,
    auto_reconnect: OPTION_AUTO_RECONNECT,
    socketOptions: OPTION_SOCKET_OPTIONS
  },
  replset: {
    poolSize: POOL_SIZE,
    auto_reconnect: OPTION_AUTO_RECONNECT,
    socketOptions: OPTION_SOCKET_OPTIONS
  }
};

function create(url, callback) {
  mongodb.MongoClient.connect(url, DEFAULT_MONGODB_CONNECTION_OPTIONS, callback);
}

module.exports = {
  create
};