#!/bin/sh

# Mozc does not run by priviledged user.  Ignore silently.
MOZC_UID=$(id -u) || exit 1
[ "${MOZC_UID}" -eq 0 ] && exit 0

# Mozc looks into the following directories:
#
#   ~/.mozc if any
#   ${XDG_CONFIG_HOME}/mozc
#   ~/.config/mozc
#
if [ -z "${HOME}" ]; then
	echo "HOME is not set." >&2
	exit 1
fi
if [ -d "${HOME}/.mozc" ]; then
	MOZCDIR="${HOME}/.mozc"
else
	MOZCDIR="${XDG_CONFIG_HOME:-${HOME}/.config}/mozc"
fi

mkdir -m 0700 -p "${MOZCDIR}" || exit 1
chmod 0700 "${MOZCDIR}" || exit 1

server_pids()
{
	pgrep -u "${MOZC_UID}" -x mozc_server
}
start_cmd()
{
	pids=$(server_pids)
	rc=$?
	case $rc in
	0)
		printf 'mozc_server is already running (PID: %s).\n' \
		    "${pids}" >&2
		return 1
		;;
	1)
		# No matching process.
		;;
	*)
		echo "Cannot check mozc_server status." >&2
		return 1
		;;
	esac

	daemon -c -f -p "${MOZCDIR}/mozc_server.pid" \
	    "%%PREFIX%%/libexec/mozc_server"
}
stop_cmd()
{
	pkill -TERM -u "${MOZC_UID}" -x mozc_server
	rc=$?
	case $rc in
	0|1)
		# A signal was sent, or no matching process existed.
		;;
	*)
		echo "Cannot stop mozc_server." >&2
		return 1
		;;
	esac

	attempt=0
	while :; do
		pids=$(server_pids)
		rc=$?
		case $rc in
		0)
			;;
		1)
			return 0
			;;
		*)
			echo "Cannot check mozc_server status." >&2
			return 1
			;;
		esac

		if [ "$attempt" -ge 10 ]; then
			printf 'mozc_server did not stop (PID: %s).\n' \
			    "${pids}" >&2
			return 1
		fi

		sleep 1
		attempt=$((attempt + 1))
	done
}

case $1 in
start)
	start_cmd
;;
forcestart|restart)
	stop_cmd || exit 1
	start_cmd
;;
stop|forcestop)
	stop_cmd
;;
status)
	server_pids
;;
*)
	echo "$0 [start|stop|restart|forcestart|forcestop|status]" >&2
	exit 1
;;
esac