#!/bin/sh
#set -x

mode=/mnt/cfg/infix/.use_etc
boot=/tmp/.boot_mode
if [ -f $boot ]; then
    current=$(cat $boot)
else
    current="unknown"
fi
m=on
n=off
p=off

select_mode()
{
    if [ -f $mode ]; then
	m=off
	if grep -qi profinet $boot; then
	    n=off
	    p=on
	else
	    n=on
	    p=off
	fi
    fi

    exec 3>&1
    selection=$(dialog --erase-on-exit --no-tags \
		    --hline "Arrow keys + space to select, enter to confirm" \
		    --backtitle "Select Operating Mode" \
		    --title "Select Operating Mode" \
		    --radiolist "System currently runs in: $current mode" 13 60 1 \
		    "1" "Managed NETCONF, XML datastore" "$m" \
		    "2" "Native Linux, /etc datastore"   "$n" \
		    "3" "PROFINET, /etc variant"         "$p" \
		    2>&1 1>&3)
    exit_status=$?
    exec 3>&-
    case $exit_status in
	1)			# cancel
	    exit 0
	    ;;
	255)			# escape
	    exit 1
	    ;;
    esac
}

usage()
{
    cat <<EOF
usage:
  chom [-h] [etc | netconf]

options:
  -h            Show this help text

arguments:
  etc           Change to Linux native mode, /etc
  netconf       Change to NETCONF mode, XML
  profinet      Change to PROFINET mode, /etc variant

EOF
}

case $1 in
    -h)
	usage
	exit 0
	;;
    net* | xml)
	selection=1
	;;
    nat* | etc*)
	selection=2
	;;
    profinet)
	selection=3
	;;
    *)
	;;
esac

if [ -z "$selection" ]; then
    use_dialog=1
    select_mode
fi

case $selection in
    1)
	rm -f $mode 2>/dev/null
	grep -qi netconf $boot 2>/dev/null && exit 0
	result="Manageed NETCONF"
	;;
    2)
	echo "native /etc" > $mode
	grep -qi native $boot  2>/dev/null && exit 0
	result="Native Linux, /etc"
	;;
    3)
	echo "PROFINET" > $mode
	grep -qi profinet $boot  2>/dev/null && exit 0
	result="PROFINET"
	;;
esac

if [ -n "$use_dialog" ]; then
    dialog --erase-on-exit --cr-wrap --title "Activate Mode Change?" --yesno "\n   Reboot to $result mode now?" 8 50
    if [ $? -eq 0 ]; then
	reboot
    fi
fi

echo "Remember to reboot later to activate the change."
exit 0