#!/bin/sh /etc/rc.common
#
# OpenWISP Monitoring Daemon

# shellcheck disable=SC2034
START=99
STOP=15
USE_PROCD=1
PROG="/usr/sbin/openwisp-monitoring"
PROG_NAME="OpenWISP monitoring daemon"

time_to_seconds() {
	time=$1

	{ [ "$time" -ge 1 ] 2>/dev/null && seconds="$time"; } \
		|| { [ "${time%s}" -ge 1 ] 2>/dev/null && seconds="${time%s}"; } \
		|| { [ "${time%m}" -ge 1 ] 2>/dev/null && seconds=$((${time%m} * 60)); } \
		|| { [ "${time%h}" -ge 1 ] 2>/dev/null && seconds=$((${time%h} * 3600)); } \
		|| { [ "${time%d}" -ge 1 ] 2>/dev/null && seconds=$((${time%d} * 86400)); }

	echo $seconds
	unset seconds
	unset time
}

start_service() {
	# for openwisp-config
	config_load openwisp
	config_get base_url http url
	config_get uuid http uuid
	config_get key http key
	config_get_bool verify_ssl http verify_ssl "1"
	config_get respawn_threshold http respawn_threshold
	config_get respawn_timeout http respawn_timeout
	config_get respawn_retry http respawn_retry

	[ -n "$base_url" ] && base_url="--url $base_url"
	[ -n "$uuid" ] && uuid="--uuid $uuid"
	[ -n "$key" ] && key="--key $key"
	[ -n "$verify_ssl" ] && verify_ssl="--verify_ssl $verify_ssl"

	if [ -z "$base_url" ]; then
		logger -s "url is not set, please add it to /etc/config/openwisp" \
			-t openwisp-monitoring \
			-p daemon.err
		exit 1
	fi

	# for openwisp-monitoring
	config_load openwisp-monitoring
	config_get monitored_interfaces monitoring monitored_interfaces "*"
	config_get interval monitoring interval "300"
	config_get_bool verbose_mode monitoring verbose_mode "0"
	config_get required_memory monitoring required_memory "0.05"
	config_get max_retries monitoring max_retries "5"

	interval="$(time_to_seconds "$interval")"
	if [ "$interval" -lt 1 ]; then
		logger -s "Interval is invalid. Use time value(eg: '10', '2m', '3h', '1d')" \
			-t openwisp-monitoring \
			-p daemon.err
		exit 1
	fi
	interval="--interval $interval"
	verbose="--verbose_mode ${verbose_mode:-0}"
	required_memory="--required_memory $required_memory"
	max_retries="--max_retries $max_retries"

	procd_open_instance "openwisp-monitoring_collect_data"
	# shellcheck disable=SC2086,SC2154
	procd_set_param command $PROG $interval $verbose $required_memory --mode collect --monitored_interfaces "$monitored_interfaces"
	procd_set_param respawn "${respawn_threshold:-3600}" "${respawn_timeout:-5}" "${respawn_retry:-5}"
	[ "$verbose_mode" -eq "1" ] && procd_set_param stdout 1 && procd_set_param stderr 1
	procd_close_instance

	procd_open_instance "openwisp-monitoring_send_data"
	# shellcheck disable=SC2086
	procd_set_param command $PROG $base_url $uuid $key $verify_ssl $interval $verbose $max_retries --mode send
	procd_set_param respawn "${respawn_threshold:-3600}" "${respawn_timeout:-5}" "${respawn_retry:-5}"
	[ "$verbose_mode" -eq "1" ] && procd_set_param stdout 1 && procd_set_param stderr 1
	procd_close_instance

	logger -s "$PROG_NAME started" \
		-t openwisp-monitoring \
		-p daemon.info
}

stop_service() {
	logger -s "$PROG_NAME stopping" \
		-t openwisp-monitoring \
		-p daemon.info
}

service_triggers() {
	procd_add_reload_trigger "openwisp" "openwisp-monitoring"
}