#!/usr/bin/python
# -*- encoding: utf-8; py-indent-offset: 4 -*-
# +------------------------------------------------------------------+
# |             ____ _               _        __  __ _  __           |
# |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
# |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
# |           | |___| | | |  __/ (__|   <    | |  | | . \            |
# |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
# |                                                                  |
# | Copyright Mathias Kettner 2013             mk@mathias-kettner.de |
# +------------------------------------------------------------------+
#
# This file is part of Check_MK.
# The official homepage is at http://mathias-kettner.de/check_mk.
#
# check_mk is free software;  you can redistribute it and/or modify it
# under the  terms of the  GNU General Public License  as published by
# the Free Software Foundation in version 2.  check_mk is  distributed
# in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
# out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
# PARTICULAR PURPOSE. See the  GNU General Public License for more de-
# tails. You should have  received  a copy of the  GNU  General Public
# License along with GNU Make; see the file  COPYING.  If  not,  write
# to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
# Boston, MA 02110-1301 USA.

factory_settings["bluecat_dhcp"] = {
    "oper_states": {
        "warning": [2, 3, 4],
        "critical": [5],
    },
}


def inventory_bluecat_dhcp(info):
    # Check if DHCP is not stopped on at least one host
    for _node, oper_state, _leases in info:
        if oper_state != '2':
            return [(None, None)]


def check_bluecat_dhcp(item, params, info):
    oper_states = {
        1: "running normally",
        2: "not running",
        3: "currently starting",
        4: "currently stopping",
        5: "fault",
        None: "unknown",
    }

    ok_on_node = False
    states = {}
    state = 0
    oper_state = None

    # Collect  states of nodes
    for node, oper_state, leases in info:
        oper_state, leases_sec = map(int, (oper_state, leases))
        temp_state = 0
        if oper_state in params['oper_states']['warning']:
            state = max(state, 1)
            temp_state = 1
        elif oper_state in params['oper_states']['critical']:
            state = 2
            temp_state = 2
        else:
            # If node one ok, the total check is ok
            ok_on_node = node
        # Only needed in cluster:
        states[node] = {
            'oper_state': oper_states[oper_state],
            'leases_sec': leases_sec,
            'state': temp_state
        }

    # Are we in a Cluster?
    if len(info) > 1:
        if ok_on_node:
            node = ok_on_node
            # One Node is OK:
            yield 0, "DHCP is %s on %s" % (states[node]['oper_state'], node)
            yield 0, '%s Leases per second' % (states[node]['leases_sec']), [
                ('leases', states[node]['leases_sec'])
            ]
        else:
            # None of the nodes is ok:
            for node, data in states.items():
                yield data['state'], "%s on %s" % (data['oper_state'], node)
        return

    # Default behavior without Cluster
    yield state, "DHCP is %s" % oper_states[oper_state]
    yield 0, '%s Leases per second' % leases_sec, [('leases', leases_sec)]


check_info["bluecat_dhcp"] = {
    "check_function": check_bluecat_dhcp,
    "inventory_function": inventory_bluecat_dhcp,
    "node_info": True,
    "service_description": "DHCP",
    "has_perfdata": True,
    "default_levels_variable": "bluecat_dhcp",
    "group": "bluecat_dhcp",
    "snmp_scan_function": lambda oid: oid(".1.3.6.1.2.1.1.2.0") == ".1.3.6.1.4.1.13315.2.1",
    "snmp_info": (
        ".1.3.6.1.4.1.13315.3.1.1.2.1",
        [
            1,  # dhcpOperState
            3,  # dhcpLeaseStatsSuccess
        ])
}
