import { LCD } from '@sek1ro/i2c-lcd'
import si from 'systeminformation'

const lcd = new LCD(1, 0x27)
await lcd.open()

function BtoGB(bytes) {
  return (bytes / 1024 ** 3).toFixed(1)
}

async function showSystemStats() {
  const [cpu, mem, disks] = await Promise.all([
    si.currentLoad(),
    si.mem(),
    si.fsSize(),
  ]);

  const cpuLoad = cpu.currentLoad.toFixed(1).padStart(4, ' ')
  const totalMem = BtoGB(mem.total)
  const usedMem = BtoGB(mem.total - mem.available)

  let diskTotalMem = 0
  let diskUsedMem = 0

  for (const disk of disks) {
    diskTotalMem += disk.size
    diskUsedMem += disk.used
  }
  diskTotalMem = BtoGB(diskTotalMem)
  diskUsedMem = BtoGB(diskUsedMem)

  await lcd.send(LCD.ClearDisplay())

  const hours = new Date().getHours()
  if (hours >= 23 || hours < 7) {
    lcd.backlight = false
  } else {
    lcd.backlight = true
  }
  await lcd.jump(0, 0)
  await lcd.sendString(`${diskUsedMem}/${diskTotalMem}GB`)

  await lcd.jump(0, 1)
  await lcd.sendString(`${usedMem}/${totalMem}GB`)

  await lcd.jump(11, 1)
  await lcd.sendString(`${cpuLoad}%`)
}

await showSystemStats()
setInterval(showSystemStats, 1000)