#!/usr/bin/env bash
# Script to select a random VPN client from /etc/openvpn/client/ (the default openvpn directory)
# remember that openvpn profiles in /etc/openvpn/client/ need to be in the format profile.conf
# Example: hk-04.conf

workdir="/etc/openvpn/client/"
isopenvpn=$(command -v openvpn > /dev/null)
issystemd=$(command -v systemctl > /dev/null)

if [ $UID -ne 0 ]; then
  echo "You need root privileges."
  exit
fi

if [ ! -z $isopenvpn ] || [ ! -z $issystemd ]; then
  echo "OpenVPN or systemd not installed, exiting."
  exit
fi

if [ "$1" == "stop" ]; then
  systemctl stop openvpn-client@*
  exit

elif [ "$1" == "start" ]; then
  systemctl stop openvpn-client@*
  if [ -d "$workdir" ]; then
    cd "$workdir"
    vpn=$(shuf -ezn 1 * | xargs -0 -n1)
    if [ -f "$vpn" ]; then
      vpn=$(echo "$vpn" | cut -f1 -d '.')
      systemctl start "openvpn-client@$vpn"
      exit
    else
      echo "$vpn is not a file."
      exit
    fi
  else
    echo "$workdir does not exist, leaving."
    exit
  fi
else
  echo -e "Usage:\n $0 start - start a random OpenVPN client. \n $0 stop - stop the initialized OpenVPN client."
  exit
fi