const express = require('express')
const fs = require('fs')
const app = express()
const port = process.env.PORT

app.use(express.static('public'))
app.use(express.text({type: '*/*'}))

app.post('/', (req, res) => {
  const count = req.body
  const loc = req.get('User-Agent').slice(3)
  const time = req.get('X-Timestamp') || Date.now()
  console.log(`Writing to database! ${loc}, ${time}, ${count}`)
  res.sendStatus(204)
  fs.appendFile('db.csv', `${loc},${time},${count}\n`, function (err) {
    if (err) throw err;
    console.log('Saved!');
  })
})

app.get('/db.csv', (_, res) => res.sendFile(`${__dirname}/db.csv`))

app.listen(port, () => {
  console.log(`Listening at http://localhost:${port}`)
})