const http = require('http');
const port = 3000;
const pClient = require('prom-client');
const metrics = require('./index');

const collectDefaultMetrics = pClient.collectDefaultMetrics;

const requestHandler = (req, res) => {
  switch(req.url) {
    case '/metrics':
        metrics.getUsage((metrics) => {
            let usedGauge = new pClient.Gauge({ name: 'act_fup_usage_gigabytes_total', help: 'ACT current usage in GB' });
        usedGauge.set(metrics.used);
        let totalGauge = new pClient.Gauge({ name: 'act_fup_max_gigabytes_total', help: 'ACT FUP limit in GB' });
        totalGauge.set(metrics.total)
        let register = pClient.register;

        res.set('Content-Type', register.contentType);
        res.end(register.metrics());    
        });
        
    break;
    default:
    break;
  }
}

const server = http.createServer(requestHandler)

server.listen(port, (err) => {
  if (err) {
    return console.log('something bad happened', err)
  }

  console.log(`server is listening on ${port}`)
})