var mongoose = require('mongoose');
var config = require('./config/database.js');
var DB_URL = config.db.url;

mongoose.connection.on("connected", function(ref) {
    console.log("Connected to " + " DB!");
});

mongoose.connection.on("error", function(err) {
    console.error('Failed to connect to DB ' + ' on startup ', err);
    if (err) {
        return next(err);
    }
});

mongoose.connection.on('disconnected', function(err) {
    console.log('Mongoose default connection to DB :' + ' disconnected');
    if (err) {
        return next(err);
    }
});

var gracefulExit = function() {
    mongoose.connection.close(function () {
        console.log('Mongoose default connection with DB :'  + ' is disconnected through app termination');
        process.exit(0);
    });
}

process.on('SIGINT', gracefulExit).on('SIGTERM', gracefulExit);

exports.con_close = function () {
    console.log('Mongoose connection disconnected');
    mongoose.connection.close();
}

var options = {
    server: {
        socketOptions: {
            keepAlive: 1000,
            connectTimeoutMS: 30000
        }
    },
    replset: {
        rs_name: 'replicaset',
        auto_reconnect:true,
        socketOptions: {
            keepAlive: 1000, // doubt about it
            connectTimeoutMS: 30000
        }
    },
    user: 'root',
    pass: 'G3saGT2Y',
    auth: {
        authdb: 'admin'
    }
}

mongoose.connect(DB_URL, options, function(err) {
    console.log('ho rha hai');
    if (err) {
        console.log('error connection to mongo server!');
        console.log(err);
    }
});