import cmd from './cmd'
import tc from '@uci/try-catch'

async function scan(interf) {
  let ret = null
  let cmdStr =
    'nmcli --terse --fields active,ssid,bssid,mode,chan,freq,signal,security,wpa-flags,rsn-flags,device device wifi list'
  ret = await tc(cmd)(cmdStr)
  if (ret.err) return { error: `scan failed -- ${ret.err.cmd}` }
  let lines = ret.res.split('\n')
  let networks = []
  for (let i = 0; i < lines.length; i++) {
    if (lines[i] != '') {
      // TODO simply the parsing
      let fields = lines[i].replace(/\\:/g, '&&').split(':')
      let ssid = fields[1].replace(/&&/g, ':')
      let iface = fields[10].replace(/&&/g, ':')
      if (ssid !== '--' && (interf ? interf === iface : true)) {
        // if (ssid !== '--' ) {
        networks.push({
          active: fields[0].replace(/&&/g, ':'),
          iface: iface,
          ssid: ssid,
          bssid: fields[2].replace(/&&/g, ':'),
          mac: fields[2].replace(/&&/g, ':'), // for retrocompatibility with version 1.x
          mode: fields[3].replace(/&&/g, ':'),
          channel: parseInt(fields[4].replace(/&&/g, ':')),
          frequency: parseInt(fields[5].replace(/&&/g, ':')),
          signal_quality: Number(fields[6].replace(/&&/g, ':')),
          security:
            fields[7].replace(/&&/g, ':') != '(none)'
              ? fields[7].replace(/&&/g, ':')
              : 'none',
          security_flags: {
            wpa: fields[8].replace(/&&/g, ':'),
            rsn: fields[9].replace(/&&/g, ':')
          }
        })
      }
    }
  }
  return networks
}

export default scan