#!/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 re  # pylint: disable=C0413
import sys  # pylint: disable=C0413

import lib.base  # pylint: disable=C0413
import lib.shell  # pylint: disable=C0413
import lib.version  # pylint: disable=C0413
from lib.globals import (STATE_UNKNOWN) # pylint: disable=C0413

__author__ = 'Linuxfabrik GmbH, Zurich/Switzerland'
__version__ = '2025022001'

DESCRIPTION = 'Tracks if MySQL/MariaDB is EOL.'

DEFAULT_CHECK_MAJOR = False
DEFAULT_CHECK_MINOR = False
DEFAULT_CHECK_PATCH = False
DEFAULT_INSECURE = False
DEFAULT_NO_PROXY = False
DEFAULT_OFFSET_EOL = -30 # days
DEFAULT_TIMEOUT = 8


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(
        '--check-major',
        help='Alert me when there is a new major release available, '
             'even if the current version of my product is not EOL. '
             'Example: Notify when I run v26 (not yet EOL) and v27 is available. '
             'Default: %(default)s',
        dest='CHECK_MAJOR',
        action='store_true',
        default=DEFAULT_CHECK_MAJOR,
    )

    parser.add_argument(
        '--check-minor',
        help='Alert me when there is a new major.minor release available, '
             'even if the current version of my product is not EOL. '
             'Example: Notify when I run v26.2 (not yet EOL) and v26.3 is available. '
             'Default: %(default)s',
        dest='CHECK_MINOR',
        action='store_true',
        default=DEFAULT_CHECK_MINOR,
    )

    parser.add_argument(
        '--check-patch',
        help='Alert me when there is a new major.minor.patch release available, '
             'even if the current version of my product is not EOL. '
             'Example: Notify when I run v26.2.7 (not yet EOL) and v26.2.8 is available. '
             'Default: %(default)s',
        dest='CHECK_PATCH',
        action='store_true',
        default=DEFAULT_CHECK_PATCH,
    )

    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(
        '--offset-eol',
        help='Alert me n days before ("-30") or after an EOL date ("30" or "+30"). '
             'Default: %(default)s days',
        dest='OFFSET_EOL',
        type=int,
        default=DEFAULT_OFFSET_EOL,
    )

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

    return parser.parse_args()


def get_installed_version():
    success, result = lib.shell.shell_exec('mysqld --version')
    if success:
        stdout = result[0].strip()
        # where to find the version number in output?
        version_regex = r'Ver (.*?) '
        try:
            stdout = re.search(version_regex, stdout)
            return stdout.group(1).strip()
        except:
            pass

    success, result = lib.shell.shell_exec('mariadb --version')
    if not success:
        success, result = lib.shell.shell_exec('mysql --version')
    if not success:
        return ''

    stdout = result[0].strip()
    # where to find the version number in output?
    version_regex = r'(?i)b (.*?),'
    try:
        stdout = re.search(version_regex, stdout)
        return stdout.group(1).strip()
    except:
        return ''


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
    installed_version = get_installed_version()
    if not installed_version:
        lib.base.cu('MariaDB/MySQL not found.')
    mariadb = 'MariaDB' in installed_version
    installed_version = installed_version.replace('-MariaDB', '')
    if mariadb:
        state, msg = lib.version.check_eol(
            'https://endoflife.date/api/mariadb.json',
            installed_version,
            offset_eol=args.OFFSET_EOL,
            check_major=args.CHECK_MAJOR,
            check_minor=args.CHECK_MINOR,
            check_patch=args.CHECK_PATCH,
            insecure=args.INSECURE,
            no_proxy=args.NO_PROXY,
            timeout=args.TIMEOUT,
        )
    else:
        state, msg = lib.version.check_eol(
            'https://endoflife.date/api/mysql.json',
            installed_version,
            offset_eol=args.OFFSET_EOL,
            check_major=args.CHECK_MAJOR,
            check_minor=args.CHECK_MINOR,
            check_patch=args.CHECK_PATCH,
            insecure=args.INSECURE,
            no_proxy=args.NO_PROXY,
            timeout=args.TIMEOUT,
        )

    # over and out
    lib.base.oao(
        '{} v{} ({})'.format('MariaDB' if mariadb else 'MySQL', installed_version, msg),
        state,
        lib.base.get_perfdata(
            'mysql-version',
            lib.version.version2float(installed_version),
            None,
            None,
            None,
            0,
            None,
        ),
        always_ok=args.ALWAYS_OK,
    )


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