#!/bin/bash

######################################################################
#
# Skript zur Konfiguration des aktiven Netzwerkschnittstellen-Profils.
#
######################################################################

ETH="$( ip r | grep default | awk '{printf $5;}' )"
IP="$( ip a | grep "$ETH" | awk '/inet/{printf $2;}' )"
DR="$( ip r | awk '{ print $3 }' | head -1 )"
DNS1="$( nmcli dev show  2>/dev/null | grep DNS | awk '{ print $2 }' )"
ACON="$(nmcli -g name connection show | head -1)"

printf "\n\n=============================================\n      aktuelles Netzwerkprofil anpassen\n=============================================\n\n"
PS3="Wähle: "

select ca in dhcp manuell beenden; do
	case $ca in
		dhcp)
			nmcli con modify "$ACON" ifname "$ETH" ipv4.method auto
			echo "Änderungen wurden übernommen"
			sleep 1
			printf "\n=============================================\nRechner wird in 5 Sekunden neu gestartet\n=============================================\n\n"
			echo -ne '          <<<<<<<<<<<<<<<<<<<<<<<<<[5]\r'
			sleep 1
			echo -ne '          <<<<<<<<<<<<<<<<<<<<-----[4]\r'
			sleep 1
			echo -ne '          <<<<<<<<<<<<<<<----------[3]\r'
			sleep 1
			echo -ne '          <<<<<<<<<<---------------[2]\r'
			sleep 1
			echo -ne '          <<<<<--------------------[1]\r'
			sleep 0.5
			echo "              bye bye, see ya............."
			sleep 0.5
			exec /sbin/reboot
			;;

		manuell)
			IP4="$IP"
			read -e -r -i "$IP4" -p "IP-Adresse ggf. anpassen: " input
			IP4="${input:-$IP4}"

			GW4="$DR"
			read -e -r -i "$GW4" -p "Default Route ggf. anpassen: " input
			GW4="${input:-$GW4}"

			DNS1="$DNS1"
			read -e -r -i "$DNS1" -p "Bitte DNS-Server1 anpassen: " input
			DNS1="${input:-$DNS1}"

			# List interfaces
			Link="$ETH" 
			read -e -r -i "$ETH" -p "aktives Netzwerkinterfaces: " input
			LINK="${input:-$LINK}"

			nmcli con modify "$ACON" ifname "$LINK" ipv4.method manual ipv4.address "$IP4" ipv4.gateway "$GW4" ipv4.dns "$DNS1"
			echo "Änderungen wurden übernommen"
			sleep 1
			printf "\n========================================\nRechner wird in 5 Sekunden neu gestartet\n========================================\n"
			echo -ne '<<<<<<<<<<<<<<<<<<<<<<<<<[5]\r'
			sleep 1
			echo -ne '<<<<<<<<<<<<<<<<<<<<-----[4]\r'
			sleep 1
			echo -ne '<<<<<<<<<<<<<<<----------[3]\r'
			sleep 1
			echo -ne '<<<<<<<<<<---------------[2]\r'
			sleep 1
			echo -ne '<<<<<--------------------[1]\r'
			sleep 0.5
			echo "bye bye, see ya............."
			sleep 0.5
			exec /sbin/reboot
			;;

		beenden)
			break
			;;
		*)
			echo "ungültige Option $REPLY"
			;;
	esac
done


exit 0