#!/bin/sh
### BEGIN INIT INFO
# Provides:          nginx-amplify-agent
# Required-Start:    $network $remote_fs $local_fs
# Required-Stop:     $network $remote_fs $local_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Stop/start nginx-amplify-agent
### END INIT INFO

PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC=amplify-agent
NAME=amplify-agent
CONFFILE=/etc/amplify-agent/agent.conf
DAEMON=/usr/bin/nginx-amplify-agent.py
PIDFILE=/var/run/amplify-agent/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME
USER=nginx
DEBUG_LOG="$2"

if [ -f "$CONFFILE" ]; then
    CONFIG_AMPLIFY_USER=`grep -v '#' ${CONFFILE} | \
                         grep -A 10 -i '\[.*nginx.*\]' | \
                         grep -i 'user.*=' | \
                         awk -F= '{print $2}' | \
                         sed 's/ //g' | \
                         head -1`
    NGINXCONF=`grep -v '#' ${CONFFILE} | \
	       grep -A 10 -i '\[.*nginx.*\]' | \
               grep -i 'configfile.*=' | \
               awk -F= '{print $2}' | \
               sed 's/ //g' | \
               head -1`
fi

if [ -z "$NGINXCONF" ]; then
    NGINXCONF=/etc/nginx/nginx.conf
fi

if [ -f "$NGINXCONF" ]; then
    CONFIG_NGINX_USER=`grep 'user[[:space:]]' ${NGINXCONF} | \
                       grep -v '[#].*user.*;' | \
                       grep -v '_user' | \
                       sed -n -e 's/.*\(user[[:space:]][[:space:]]*[^;]*\);.*/\1/p' | \
                       awk '{ print $2 }' | head -1`
fi

if [ -n "$CONFIG_AMPLIFY_USER" ]; then
     USER=$CONFIG_AMPLIFY_USER
else
    test -n "$CONFIG_NGINX_USER" && \
    USER=$CONFIG_NGINX_USER
fi

[ -x $DAEMON ] || exit 0

DAEMON_ARGS="--config=$CONFFILE --pid=$PIDFILE"

. /lib/init/vars.sh
. /lib/lsb/init-functions

do_start()
{
    mkdir -p /var/run/amplify-agent && chown $USER /var/run/amplify-agent
    chown -f $USER /etc/amplify-agent/agent.conf
    chown -f $USER /var/log/amplify-agent/agent.log
    start-stop-daemon --start --chuid $USER --exec $DAEMON start -- $DAEMON_ARGS
    RETVAL="$?"
    return "$RETVAL"
}

do_stop()
{
    start-stop-daemon --stop --quiet --oknodo --retry=TERM/30/KILL/5 --pidfile $PIDFILE --user $USER
    RETVAL="$?"
    rm -f $PIDFILE
    return "$RETVAL"
}

do_configtest() {
    $DAEMON configtest $DAEMON_ARGS
    RETVAL="$?"
    return $RETVAL
}

do_debug() {
    mkdir -p /var/run/amplify-agent && chown $USER /var/run/amplify-agent
    chown $USER /etc/amplify-agent/agent.conf
    chown $USER `dirname $DEBUG_LOG`
    start-stop-daemon --start --chuid $USER --exec $DAEMON debug -- $DAEMON_ARGS --log=$DEBUG_LOG
    RETVAL="$?"
    return $RETVAL
}

case "$1" in
    start)
        [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC " "$NAME"
        do_start
        case "$?" in
            0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
            2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
        esac
        ;;
    stop)
        [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
        do_stop
        case "$?" in
            0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
            2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
        esac
        ;;
    status)
        status_of_proc -p "$PIDFILE" "$DAEMON" "$NAME" && exit 0 || exit $?
        ;;
    configtest)
        do_configtest
        ;;
    debug)
        do_debug
        ;;
    restart|force-reload)
        log_daemon_msg "Restarting $DESC" "$NAME"
        do_stop
        case "$?" in
            0|1)
                do_start
                case "$?" in
                    0) log_end_msg 0 ;;
                    1) log_end_msg 1 ;; # Old process is still running
                    *) log_end_msg 1 ;; # Failed to start
                esac
                ;;
            *)
                # Failed to stop
                log_end_msg 1
                ;;
        esac
        ;;
    *)
        echo "Usage: $SCRIPTNAME {start|stop|status|restart|configtest|debug}" >&2
        exit 3
        ;;
esac

exit $RETVAL