#!/usr/bin/env bash

VPN_Network="VPN-SO36-wipe"

PID_FILE="/var/run/${VPN_Network}"


# ----------
# Base Function(s)
# ----------

clean_up() {

	# - Terminate connection
   # -
	if ps -p "$_pid" > /dev/null 2>&1; then
		sudo kill $_pid > /dev/null 2>&1
	fi

   # - Remove PID file
   # -
   sudo rm -f "$PID_FILE"

   if $terminal ; then
      echo -en "\033[1G"
		if [[ "$1" -gt 0 ]]; then
			blank_line
			echo -e "   \033[41m Connection to \033[1m${VPN_Network}\033[m\033[41m was terminated! \033[m"
		else
			echononl "Terminate VPN connection to \033[32m\033[1m${VPN_Network}\033[m"
			echo_done
		fi
      blank_line
   fi

   exit $1
}

echononl(){
   if $terminal ; then
      echo X\\c > /tmp/shprompt$$
      if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then
         echo -e -n "   $*\\c" 1>&2
      else
         echo -e -n "   $*" 1>&2
      fi
      rm /tmp/shprompt$$
   fi
}


echo_done() {
   if $terminal ; then
      echo -e "\033[75G[ \033[32mdone\033[m ]"
   fi
}
echo_failed(){
   if $terminal ; then
      echo -e "\033[75G[ \033[1;31mfailed\033[m ]"
   fi
}
echo_wait(){
   if $terminal ; then
      echo -en "\033[75G[ \033[5m\033[1m..\033[m ]"
   fi
}


blank_line() {
   if $terminal ; then
      echo ""
   fi
}


# ----------
# - Jobhandling 
# ----------

# - Run 'clean_up' for signals SIGHUP SIGINT SIGTERM
# -
trap clean_up SIGHUP SIGINT SIGTERM


# ----------
# - Some checks ..
# ----------

# - Running in a terminal?
# -
if [[ -t 1 ]] ; then
   terminal=true
else
   terminal=false
fi


# ----------
# - Main part of script
# ----------

blank_line
echononl "Establish VPN connection to \033[32m\033[1m${VPN_Network}\033[m"
echo_wait

sudo /usr/sbin/openvpn \
   --config /etc/openvpn/client-confs/VPN-SO36-wipe/client.conf \
   --writepid /var/run/openvpn-wipe-so36.pid \
   --log /var/log/openvpn/wipe-so36.log \
   --status /var/log/openvpn/status-wipe-so36.log > /dev/null 2>&1 &

_pid="$!"
declare -i time=0

if  ps -p "$_pid" > /dev/null 2>&1; then
	while ! ip a | grep -q -E "tun[0-9]{1,2}" 2> /dev/null && [[ $time -lt 60 ]] ; do
		sleep 1
		((time++))
	done
	if [[ $time -ge 60 ]]; then
		echo_failed
		clean_up 1
	else
   	echo_done
	fi
else
   echo_failed
   clean_up 1
fi

#while ps -p "$_pid" > /dev/null 2>&1 ; do
while ip a | grep -q -E "tun[0-9]{1,2}" 2> /dev/null ; do
   sleep 3
done

clean_up 0