#!/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
import sys

import lib.args
import lib.base
import lib.wildfly
from lib.globals import STATE_UNKNOWN

__author__ = 'Linuxfabrik GmbH, Zurich/Switzerland'
__version__ = '2026040801'

DESCRIPTION = """Checks thread pool utilization on a WildFly/JBoss AS server via its HTTP management
API. Reports current, peak, and daemon thread counts. Alerts when thread usage
exceeds the configured thresholds."""

DEFAULT_CRIT = 90
DEFAULT_INSECURE = False
DEFAULT_NO_PROXY = False
DEFAULT_TIMEOUT = 3
DEFAULT_URL = 'http://localhost:9990'
DEFAULT_USERNAME = 'wildfly-monitoring'
DEFAULT_WARN = 80


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

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

    parser.add_argument(
        '--always-ok',
        help=lib.args.help('--always-ok'),
        dest='ALWAYS_OK',
        action='store_true',
        default=False,
    )

    parser.add_argument(
        '--critical',
        help=lib.args.help('--critical') + ' Default: >= %(default)s',
        dest='CRIT',
        default=DEFAULT_CRIT,
    )

    parser.add_argument(
        '--insecure',
        help=lib.args.help('--insecure'),
        dest='INSECURE',
        action='store_true',
        default=DEFAULT_INSECURE,
    )

    parser.add_argument(
        '--instance',
        help='WildFly instance (server-config) to check when running in domain mode.',
        dest='INSTANCE',
    )

    parser.add_argument(
        '--mode',
        help='WildFly server mode. Default: %(default)s',
        dest='MODE',
        choices=['standalone', 'domain'],
        default='standalone',
    )

    parser.add_argument(
        '--no-proxy',
        help=lib.args.help('--no-proxy'),
        dest='NO_PROXY',
        action='store_true',
        default=DEFAULT_NO_PROXY,
    )

    parser.add_argument(
        '--node',
        help='WildFly node (host) when running in domain mode.',
        dest='NODE',
    )

    parser.add_argument(
        '-p',
        '--password',
        help='WildFly management API password.',
        dest='PASSWORD',
        required=True,
    )

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

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

    parser.add_argument(
        '--username',
        help='WildFly management API username. Default: %(default)s',
        dest='USERNAME',
        default=DEFAULT_USERNAME,
        required=True,
    )

    parser.add_argument(
        '--warning',
        help=lib.args.help('--warning') + ' Default: >= %(default)s',
        dest='WARN',
        default=DEFAULT_WARN,
    )

    args, _ = parser.parse_known_args()
    return args


def check_threading(args):
    data = {
        'operation': 'read-resource',
        'include-runtime': 'true',
        # /core-service/platform-mbean/type/threading
        'address': [{'core-service': 'platform-mbean'}, {'type': 'threading'}],
        'json': 1,
    }
    res = lib.wildfly.get_data(args, data)

    daemon_thread_count = int(res['daemon-thread-count'])
    thread_count = int(res['thread-count'])
    if daemon_thread_count != 0:
        thread_pct = round(float(daemon_thread_count) / float(thread_count) * 100, 1)
    else:
        thread_pct = 0

    msg = f'{thread_pct}% used ({daemon_thread_count}/{thread_count} threads)'
    perfdata = lib.base.get_perfdata(
        'thread-pct',
        thread_pct,
        uom='%',
        warn=args.WARN,
        crit=args.CRIT,
        _min=0,
        _max=100,
    )
    perfdata += lib.base.get_perfdata(
        'thread-count',
        daemon_thread_count,
        _min=0,
        _max=thread_count,
    )
    state = lib.base.get_state(thread_pct, args.WARN, args.CRIT)

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


def main():
    """The main function. This is where the magic happens."""

    # parse the command line
    try:
        args = parse_args()
    except SystemExit:
        sys.exit(STATE_UNKNOWN)

    # fetch data
    # https://docs.wildfly.org/23/Admin_Guide.html
    return check_threading(args)


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