'use strict';

// Mongodb module.
var MongoClient = require( 'mongodb' ).MongoClient;

// Database.
var db;

// Working variable.
var working;

// Callbacks array.
var arr = [];

// Exported variable.
module.exports = function( callBack ) {
    if ( db ) {
        callBack( db );
        return;
    }

    arr.push( callBack );

    if ( working ) return;

    working = true;

    var MongoDB = MongoClient.connect( 'mongodb://127.0.0.1:27017/test',
        function( err, res ) {
            if( err ) throw err;

            console.log( "Connected to MongoDB!" );

            db = res;

            for ( var i = 0; i < arr.length; i++ ) {
                arr[i]( res );
            }

            arr = [];
        }
    );
}

var collection;
new require( 'mongodb.js' )(
    function( db ) {
        collection = db.collection( 'test' );
    }
);