#!/usr/bin/env bash
# Copyright (c) 2019 Synology Inc. All rights reserved.

SYNOSYSTEMCTL="/usr/syno/bin/synosystemctl"
SERVICE_NAME="atalk"

usage() {
	local H=""
	local E=""
	cat <<EOF
Usage: $(basename "$0") <actions>
Actions:
 $H --check_status$E        get service active status
 $H --health$E              service is disable or okay: 0, something is error: 1, others: 2
 $H -h, --help$E            show this help message
EOF
}

syslog() {
	logger -p user.err -t "$(basename "$0")[$$]" "$@"
}

service_is_enabled() {
	[[ "enabled" = $(${SYNOSYSTEMCTL} get-enable-status ${SERVICE_NAME}) ]]
}

service_status() {
	${SYNOSYSTEMCTL} get-active-status ${SERVICE_NAME}
}

service_health() {
	if ! service_is_enabled; then
		return 0
	fi

	local status="$(service_status)"
	case "${status,,}" in
		"active")
			return 0
			;;
		"failed")
			syslog "service in failed status"
			return 1
			;;
		*)
			syslog "skip service status: $status"
			return 2
			;;
	esac
}

case $1 in
	--check_status)
		service_status
		;;
	--health)
		service_health
		exit $?
		;;
	-h|--help)
		usage "$@"
		;;
	*)
		usage "$@" >&2
		exit "${LSB_ERR_ARGS:-2}"
		;;
esac