#!/bin/sh /etc/rc.common
# Copyright (C) 2013-2017 OpenWrt.org

START=60
USE_PROCD=1

_log() {
	logger -p daemon.info -t prometheus-node-exporter-lua "$@"
}

start_service() {
	. /lib/functions/network.sh

	local interface port bind4 bind6

	config_load prometheus-node-exporter-lua.main
	config_get keepalive "main" http_keepalive 70
	config_get interface "main" listen_interface "loopback"
	config_get port "main" listen_port 9100

	[ "$interface" = "*" ] || {
		network_get_ipaddr  bind4 "$interface"
		network_get_ipaddr6 bind6 "$interface"
		[ -n "$bind4$bind6" ] || {
			_log "defering start until listen interface $interface becomes ready"
			return 0
		}
    }

	procd_open_instance

	procd_set_param command /usr/sbin/uhttpd -f -c /dev/null -l / -L /usr/bin/prometheus-node-exporter-lua
	[ $keepalive -gt 0 ] && procd_append_param command -k $keepalive

	if [ "$interface" = "*" ]; then
		procd_append_param command -p $port
	else
		[ -n "$bind4" ] && procd_append_param command -p $bind4:$port
		[ -n "$bind6" ] && procd_append_param command -p [$bind6]:$port
	fi

	procd_set_param stdout 1
	procd_set_param stderr 1
	procd_set_param respawn

	procd_close_instance
}

service_triggers()
{
	local interface

	procd_add_reload_trigger "prometheus-node-exporter-lua"

	config_load prometheus-node-exporter-lua.main
	config_get interface "main" listen_interface "loopback"

	[ "$interface" = "*" ] || procd_add_reload_interface_trigger "$interface"
}
