#!/bin/sh

### BEGIN INIT INFO
# Provides:          openmtc-gateway
# Required-Start:    $local_fs $network ntp
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: openmtc Gateway Service Capability Layer
### END INIT INFO

set -e

# /etc/init.d/openmtc-gateway: start and stop the openmtc Gateway

NAME="OpenMTC Gateway"
DAEMON=/usr/local/bin/openmtc-gateway-gevent
PID_FILE=/var/run/openmtc-gateway.pid
CREDENTIALS=openmtc:openmtc

MAX_RETRIES=3
MAX_SLEEP=30

test -x || exit 0

. /lib/lsb/init-functions

openmtc_start() {
    if ! /usr/sbin/ntpdate -u de.pool.ntp.org > /dev/null 2>&1; then
        log_warning_msg "Could not sync time."\
        "Consider setting the time manually."
    fi
    if start-stop-daemon --start --quiet --background --pidfile "${PID_FILE}" --make-pidfile --exec "${DAEMON}"
    then
        rc=0
        counter=0
        while [ ${counter} -lt ${MAX_SLEEP} ]; do
            rc=1
            if [ $(netstat -tulpen | grep $(cat ${PID_FILE})/python | wc -l) -gt 0 ]; then
                rc=0
                break
            fi
            counter=$((counter+1))
            sleep 1
        done
        if ! kill -0 `cat "${PID_FILE}"` >/dev/null 2>&1; then
            log_failure_msg " failed to start"
            rm -f "${PID_FILE}"
            rc=1
        fi
    else
        rc=1
    fi
    if [ "${rc}" -eq 0 ]; then
        log_end_msg 0
    else
        log_end_msg 1
        rm -f "${PID_FILE}"
    fi
}

case "$1" in
    start)
        log_daemon_msg "Starting " "${NAME}"
        if [ -s "${PID_FILE}" ] && kill -0 `cat "${PID_FILE}"` >/dev/null 2>&1; then
            log_progress_msg "${NAME} apparently already running."
            log_end_msg 0
            exit 0
        fi
        openmtc_start
        ;;
    stop)
        log_daemon_msg "Stopping " "${NAME}"
        start-stop-daemon --stop --signal INT --quiet --oknodo --pidfile "${PID_FILE}"
        log_end_msg 0
        rm -f "${PID_FILE}"
        ;;
    restart)
        set +e
        log_daemon_msg "Restarting " "${NAME}"
        if [ -s "${PID_FILE}" ] && kill -0 `cat "${PID_FILE}"` >/dev/null 2>&1; then
            start-stop-daemon --stop --signal INT --quiet --oknodo --pidfile "${PID_FILE}" || true
            sleep 1
        else
            log_warning_msg "${NAME} not running, attempting to start."
            rm -f "${PID_FILE}"
        fi
        openmtc_start
        ;;
    status)
        status_of_proc -p "${PID_FILE}" "${DAEMON}" "${NAME}"
        if [ $? -eq 0 ]; then
            if [ $(netstat -tulpen | grep $(cat ${PID_FILE})/python | wc -l) -gt 0 ]; then
                log_success_msg "${NAME} port is reachable"
                exit 0 # notreached due to set -e
            fi
            log_failure_msg "${NAME} port not reachable."
            exit 1
        fi
        ;;
    *)
        echo "Usage: /etc/init.d/openmtc-gateway {start|stop|restart|status}"
        exit 1
esac

exit 0