const config = require('config');
const winston = require('winston');
const logdna = require('logdna');
const ip = require('ip');
const os = require("os");

winston.emitErrs = true;
const logger = new winston.Logger({
    transports: [
        new winston.transports.File({
            filename: 'log.log',
            level: 'debug'
        })
    ],
    handleExceptions: true,
    humanReadableUnhandledException: true,
    exitOnError: false,
    meta: true,
});

if (config.enableLogdnaLogging === true && config.logdnaKey) {
    // Setup logging for LogDNA cloud logging.
    logger.add(winston.transports.Logdna, {
        level: 'info',
        index_meta: true,
        key: config.logdnaKey,
        ip: ip.address(),
        hostname: os.hostname(),
        app: config.app
    });
    logger.debug('[logging] Started LogDNA winston transport.');
} else if (config.enableLogdna === true) {
    throw "Attempted to enable LogDNA transport without a key!";
}

if (config.enableConsoleLogging === true) {
    logger.add(winston.transports.Console, {
        level: 'silly',
        colorize: true
    });
}

module.exports = logger;