#!/bin/sh

# container-tools - Manage systemd-nspawn containers
# Copyright (C) 2014-2016 Daniel Baumann <daniel.baumann@open-infrastructure.net>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

set -e

if [ -e /usr/bin/uptime.orig.procps ]
then
	# debian
	UPTIME="$(/usr/bin/uptime.orig.procps)"
else
	# standalone
	UPTIME="$(/usr/bin/uptime)"
fi

DATE_HOST="$(date +%s)"

DATE_CONTAINER="$(stat -c %z /dev/pts)"
DATE_CONTAINER="$(date +%s -d"${DATE_CONTAINER}")"

UPTIME_CONTAINER="$((${DATE_HOST} - ${DATE_CONTAINER}))"
#UPTIME_CONTAINER=${1}

if [ ${UPTIME_CONTAINER} -lt 3600 ]
then
	# container uptime << 1 hour
	MINUTES="$(( ${UPTIME_CONTAINER} / 60 ))"

	if [ "${MINUTES}" = "0" ]
	then
		MINUTES="1"
	fi

	UPTIME="$(echo "${UPTIME}" | sed -e "s| up .* days, .*:[0-9][0-9], | up ${MINUTES} min, |" \
					 -e "s| up .* day, .*:[0-9][0-9], | up ${MINUTES} min, |" \
					 -e "s| up .* min, | up ${MINUTES} min, |")"
elif [ ${UPTIME_CONTAINER} -lt 86400 ]
then
	# container uptime << 1day
	HOURS="$(( ${UPTIME_CONTAINER} / 3600 ))"
	MINUTES="$(( (${UPTIME_CONTAINER} - (${HOURS} * 3600)) / 60 ))"

	UPTIME="$(echo "${UPTIME}" | sed -e "s| up .* days, .*:[0-9][0-9], | up ${HOURS}:${MINUTES}, |" \
					 -e "s| up .* day, .*:[0-9][0-9], | up ${MINUTES} min, |")"
elif [ "${UPTIME_CONTAINER}" -lt 172800 ]
then
	# container uptime << 2 days
	DAYS="$(( ${UPTIME_CONTAINER} / 86400 ))"
	HOURS="$(( (${UPTIME_CONTAINER} - (${DAYS} * 86400)) / 3600 ))"
	MINUTES="$(( (${UPTIME_CONTAINER} - (${HOURS} * 3600)) / 60 ))"

	UPTIME="$(echo "${UPTIME}" | sed -e "s| up .* days, .*:[0-9][0-9], | up ${HOURS}:${MINUTES}, |" \
					 -e "s| up .* day, .*:[0-9][0-9], | up ${MINUTES} min, |")"
else
	# container uptime >= 2 days
	DAYS="$(( ${UPTIME_CONTAINER} / 86400 ))"
	HOURS="$(( (${UPTIME_CONTAINER} - (${DAYS} * 86400)) / 3600 ))"
	MINUTES="$(( (${UPTIME_CONTAINER} - (${HOURS} * 3600)) / 60 ))"

	UPTIME="$(echo "${UPTIME}" | sed -e "s| up .* days, .*:[0-9][0-9], | up ${HOURS}:${MINUTES}, |")"
fi

echo D: ${UPTIME_CONTAINER}
echo D: ${DAYS} days  ${HOURS}:${MINUTES}

echo "${UPTIME}"