#!/usr/bin/env python3
# -*- coding: utf-8; py-indent-offset: 4 -*-
#
# Author:  Linuxfabrik GmbH, Zurich, Switzerland
# Contact: info (at) linuxfabrik (dot) ch
#          https://www.linuxfabrik.ch/
# License: The Unlicense, see LICENSE file.

# https://github.com/Linuxfabrik/monitoring-plugins/blob/main/CONTRIBUTING.md

"""See the check's README for more details.
"""

import argparse  # pylint: disable=C0413
import sys  # pylint: disable=C0413

import lib.args  # pylint: disable=C0413
import lib.base  # pylint: disable=C0413
import lib.human  # pylint: disable=C0413
import lib.nodebb  # pylint: disable=C0413
import lib.lftest  # pylint: disable=C0413
from lib.globals import (STATE_CRIT, STATE_OK,  # pylint: disable=C0413
                          STATE_UNKNOWN, STATE_WARN)

__author__ = 'Linuxfabrik GmbH, Zurich/Switzerland'
__version__ = '2025021501'

DESCRIPTION = """Get NodeBB database information."""

DEFAULT_CRIT = 95
DEFAULT_INSECURE = False
DEFAULT_NO_PROXY = False
DEFAULT_SERVERITY = 'warn'
DEFAULT_TIMEOUT = 3
DEFAULT_URL = 'http://localhost:4567/forum'
DEFAULT_WARN = 90


def parse_args():
    """Parse command line arguments using argparse.
    """
    parser = argparse.ArgumentParser(description=DESCRIPTION)

    parser.add_argument(
        '-V', '--version',
        action='version',
        version='%(prog)s: v{} by {}'.format(__version__, __author__)
    )

    parser.add_argument(
        '--always-ok',
        help='Always returns OK.',
        dest='ALWAYS_OK',
        action='store_true',
        default=False,
    )

    parser.add_argument(
        '-c', '--critical',
        help='Set the CRIT threshold as a percentage. '
             'Default: >= %(default)s',
        dest='CRIT',
        type=int,
        default=DEFAULT_CRIT,
    )

    parser.add_argument(
        '--insecure',
        help='This option explicitly allows to perform "insecure" SSL connections. '
             'Default: %(default)s',
        dest='INSECURE',
        action='store_true',
        default=DEFAULT_INSECURE,
    )

    parser.add_argument(
        '--no-proxy',
        help='Do not use a proxy. '
             'Default: %(default)s',
        dest='NO_PROXY',
        action='store_true',
        default=DEFAULT_NO_PROXY,
    )

    parser.add_argument(
        '--severity',
        help='Severity for alerts that do not depend on thresholds. One of "warn" or "crit". '
             'Default: %(default)s',
        dest='SEVERITY',
        default=DEFAULT_SERVERITY,
        choices=['warn', 'crit'],
    )

    parser.add_argument(
        '--test',
        help='For unit tests. Needs "path-to-stdout-file,path-to-stderr-file,expected-retc".',
        dest='TEST',
        type=lib.args.csv,
    )

    parser.add_argument(
        '--timeout',
        help='Network timeout in seconds. '
             'Default: %(default)s (seconds)',
        dest='TIMEOUT',
        type=int,
        default=DEFAULT_TIMEOUT,
    )

    parser.add_argument(
        '-p', '--token',
        help='NodeBB API Bearer token.',
        dest='TOKEN',
        required=True,
    )

    parser.add_argument(
        '--url',
        help='NodeBB API URL. '
             'Default: %(default)s',
        dest='URL',
        default=DEFAULT_URL,
    )

    parser.add_argument(
        '-w', '--warning',
        help='Set the WARN threshold as a percentage. '
             'Default: >= %(default)s',
        dest='WARN',
        type=int,
        default=DEFAULT_WARN,
    )

    return parser.parse_args()


def main():
    """The main function. Hier spielt die Musik.
    """

    # parse the command line, exit with UNKNOWN if it fails
    try:
        args = parse_args()
    except SystemExit:
        sys.exit(STATE_UNKNOWN)

    # fetch data
    if args.TEST is None:
        result = lib.nodebb.get_data(args, '/api/admin/advanced/database')
    else:
        # do not call the command, put in test data
        import json
        stdout, stderr, retc = lib.lftest.test(args.TEST)
        result = json.loads(stdout)

    # init some vars
    msg = ''
    state = STATE_OK
    perfdata = ''

    # analyze data
    fs_used_percent = round(float(result['mongo']['fsUsedSize']) / float(result['mongo']['fsTotalSize']) * 100, 1)
    db_fs_state = lib.base.get_state(fs_used_percent, args.WARN, args.CRIT)
    state = lib.base.get_worst(state, db_fs_state)
    if not result['mongo']['ok']:
        db_conn_state = lib.base.str2state(args.SEVERITY)
        state = lib.base.get_worst(state, db_conn_state)
    else:
        db_conn_state = STATE_OK

    perfdata += lib.base.get_perfdata('db_collections', result['mongo']['collections'], None, None, None, 0, None)
    perfdata += lib.base.get_perfdata('db_fs_total', result['mongo']['fsTotalSize'], 'B', None, None, 0, None)
    perfdata += lib.base.get_perfdata('db_fs_used', result['mongo']['fsUsedSize'], 'B', None, None, 0, None)
    perfdata += lib.base.get_perfdata('db_fs_used_percent', fs_used_percent, '%', args.WARN, args.CRIT, 0, 100)
    perfdata += lib.base.get_perfdata('db_indexes', result['mongo']['indexes'], None, None, None, 0, None)
    perfdata += lib.base.get_perfdata('db_objects', result['mongo']['objects'], None, None, None, 0, None)

    # build the message
    msg += 'MongoDB "{}"{}: {}% Disk Usage ({}/{}){}, {} {}, {} {}, {} {}'.format(
        result['mongo']['db'],
        lib.base.state2str(db_conn_state, prefix=' '),
        fs_used_percent,
        lib.human.bytes2human(result['mongo']['fsUsedSize']),
        lib.human.bytes2human(result['mongo']['fsTotalSize']),
        lib.base.state2str(db_fs_state, prefix=' '),
        result['mongo']['collections'],
        lib.txt.pluralize('collection', result['mongo']['collections']),
        result['mongo']['indexes'],
        lib.txt.pluralize('index', result['mongo']['indexes'], 'es'),
        lib.human.number2human(result['mongo']['objects']),
        lib.txt.pluralize('object', result['mongo']['objects']),
    )

    # over and out
    lib.base.oao(msg, state, perfdata, always_ok=args.ALWAYS_OK)


if __name__ == '__main__':
    try:
        main()
    except Exception:   # pylint: disable=W0703
        lib.base.cu()
