#!/bin/sh
### BEGIN INIT INFO
# Provides:          hex-zero
# Required-Start:    $local_fs $network $remote_fs $syslog
# Required-Stop:     $local_fs $network $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: 0x0 file hosting service
# Description:       Python3 Flask application that presents a basic file hosting service
### END INIT INFO

# Author: B. Stack <bgstack15@gmail.com>

# Do NOT "set -e"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="hex-zero"
NAME=hex-zero
DAEMON=/var/www/hex-zero/hex-zero.wsgi
DAEMON_ARGS=""
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME
USER=hex-zero

# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
# and status_of_proc is working.
. /lib/lsb/init-functions

#
# Function that starts the daemon/service
#
do_start()
{
	# Return
	#   0 if daemon has been started
	#   1 if daemon was already running
	#   2 if daemon could not be started
	#start-stop-daemon --start --quiet --chuid $USER --group $USER --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
	#	|| return 1
	#start-stop-daemon --start --quiet --chuid $USER --group $USER --background --pidfile $PIDFILE --exec $DAEMON -- \
	#	$DAEMON_ARGS \
	#	|| return 2
   #su $USER -c "$DAEMON" &
	# The above code will not work for interpreted scripts, use the next
	# six lines below instead (Ref: #643337, start-stop-daemon(8) )
   test -r /var/www/hex-zero/check-for-short_url.sh && {
      /bin/sh /var/www/hex-zero/check-for-short_url.sh 1>/dev/null 2>&1 || {
         # the init script is somehow prevent all displayed output even when directly outputing it to /dev/pts/3
         echo "Please run something similar to the following, before running hex-zero:"
         echo "sudo su ${USER} -c 'pip3 --user install short_url'"
         exit 1
      }
   }
	start-stop-daemon --start --pidfile $PIDFILE --startas $DAEMON \
		--name uwsgi_python3 --test > /dev/null \
		|| return 1
	start-stop-daemon --start --background --pidfile $PIDFILE --startas $DAEMON \
		--name uwsgi_python3 -- $DAEMON_ARGS \
		|| return 2

	# Add code here, if necessary, that waits for the process to be ready
	# to handle requests from services started subsequently which depend
	# on this one.  As a last resort, sleep for some time.
}

#
# Function that stops the daemon/service
#
do_stop()
{
	# Return
	#   0 if daemon has been stopped
	#   1 if daemon was already stopped
	#   2 if daemon could not be stopped
	#   other if a failure occurred
	#start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --user $USER --pidfile $PIDFILE
   /usr/bin/uwsgi_python3 --stop $PIDFILE 2>/dev/null
	RETVAL="$?"
	[ "$RETVAL" = 2 ] && return 2
	# Wait for children to finish too if this is a daemon that forks
	# and if the daemon is only ever run from this initscript.
	# If the above conditions are not satisfied then add some other code
	# that waits for the process to drop all resources that could be
	# needed by services started subsequently.  A last resort is to
	# sleep for some time.
	start-stop-daemon --stop --quiet --oknodo --retry=0/30/KILL/5 --user $USER --pidfile $PIDFILE
	[ "$?" = 2 ] && return 2
	# Many daemons don't delete their pidfiles when they exit.
	rm -f $PIDFILE
	return "$RETVAL"
}

#
# Function that sends a SIGHUP to the daemon/service
#
do_reload() {
	#
	# If the daemon can reload its configuration without
	# restarting (for example, when it is sent a SIGHUP),
	# then implement that here.
	#
	start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name uwsgi_python3
	return 0
}

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 $?
	;;
  #reload|force-reload)
	#
	# If do_reload() is not implemented then leave this commented out
	# and leave 'force-reload' as an alias for 'restart'.
	#
	#log_daemon_msg "Reloading $DESC" "$NAME"
	#do_reload
	#log_end_msg $?
	#;;
  restart|force-reload)
	#
	# If the "reload" option is implemented then remove the
	# 'force-reload' alias
	#
	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|restart|reload|force-reload}" >&2
	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
	exit 3
	;;
esac

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