const libratoEnabled = Boolean(process.env.LIBRATO_USER);

const Metrics = {

increment(key, value, source) {

if (libratoEnabled && source) {

console.log(`source=${source} count#${key}=${value}`);

}

},

sample(key, value, source) {

if (libratoEnabled && source) {

console.log(`source=${source} sample#${key}=${value}`);

}

},

measure(key, value, source) {

if (libratoEnabled && source) {

console.log(`source=${source} measure#${key}=${value}`);

}

},

measureHrTime(key, value, source) {

const [seconds, nanoseconds] = value;

const msec = (seconds * 1000) + (nanoseconds / 1e6);

if (libratoEnabled && source) {

Metrics.measure(key, `${msec.toFixed(2)}ms`, source);

}

return msec;

},

async timing(key, source, createPromise, callback) {

const start = process.hrtime();

const result = await Promise.resolve(createPromise());

const end = process.hrtime(start);

const msec = Metrics.measureHrTime(key, end, source);

if (callback) {

callback(msec);

}

return result;

},

};

export default Metrics;