#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright (C) 2019 tribe29 GmbH - License: GNU General Public License v2
# This file is part of Checkmk (https://checkmk.com). It is subject to the terms and
# conditions defined in the file COPYING, which is part of this source code package.

# .1.3.6.1.4.1.9.9.147.1.2.2.2.1.3.40.6  "number of connections currently in use by the entire firewall"
# .1.3.6.1.4.1.9.9.147.1.2.2.2.1.3.40.7  "highest number of connections in use at any one time since system startup"
# .1.3.6.1.4.1.9.9.147.1.2.2.2.1.5.40.6  1045
# .1.3.6.1.4.1.9.9.147.1.2.2.2.1.5.40.7  2816


def inventory_cisco_asa_connections(info):
    return [(None, {})]


def check_cisco_asa_connections(_no_item, params, info):
    used_conns = int(info[0][0])
    overall_used_conns = info[1][0]
    infotext = "Currently used: %s" % used_conns
    state = 0

    if params.get("connections"):
        warn, crit = params["connections"]
        perfdata = [("fw_connections_active", used_conns, warn, crit)]
        if used_conns >= crit:
            state = 2
        elif used_conns >= warn:
            state = 1
        if state > 0:
            infotext += " (warn/crit at %s/%s)" % (warn, crit)
    else:
        perfdata = [("fw_connections_active", used_conns)]

    return state, "%s, Max. since system startup: %s" % (infotext, overall_used_conns), perfdata


check_info["cisco_asa_connections"] = {
    "inventory_function": inventory_cisco_asa_connections,
    "check_function": check_cisco_asa_connections,
    "service_description": "Connections",
    "snmp_info": (
        ".1.3.6.1.4.1.9.9.147.1.2.2.2.1",
        [
            "5",  # CISCO-FIREWALL-MIB::cfwConnectionStatValue
        ],
    ),
    "snmp_scan_function": lambda oid: oid(".1.3.6.1.2.1.1.1.0")
    .lower()
    .startswith("cisco adaptive security")
    or oid(".1.3.6.1.2.1.1.1.0").lower().startswith("cisco firewall services")
    or "cisco pix security" in oid(".1.3.6.1.2.1.1.1.0").lower(),
    "group": "cisco_fw_connections",
    "has_perfdata": True,
}
