#!/usr/bin/env python3
from __future__ import annotations

#   Copyright Fumail Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#


# This tool is used to run fuglu health checks for connectors from the command line

import sys
import argparse
import logging
import time
from typing import Any

from fuglu.connectors.check import check_fuglu_netcat, check_fuglu_smtp, check_fuglu_asmilter


def _fail(*args: Any, **kwargs: Any) -> int:  # noqa: ANN401
    del args, kwargs
    return 1


if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument("-c", "--connector", default="smtp", help="Connector to check",
                        choices=["smtp", "netcat", "asmilter"], required=True)
    parser.add_argument("--host", default="localhost", help="host where fuglu daemon is running")
    parser.add_argument("-p", "--port", type=int, default=10125, help="port on which the netcat connector is listening")
    parser.add_argument("-t", "--timeout", default=5, help="Socket timeout for check", type=int)
    parser.add_argument("-z", "--zabbix", default=False, help="Zabbix check mode", action="store_true")
    parser.add_argument("-l", "--level", default="INFO", help="Log level",
                        choices=["INFO", "DEBUG", "CRITICAL", "ERROR"])

    opt = parser.parse_args()

    if opt.zabbix:
        logging.basicConfig(level=logging.CRITICAL)
    elif opt.level == "DEBUG":
        logging.basicConfig(level=logging.DEBUG)
    elif opt.level == "ERROR":
        logging.basicConfig(level=logging.ERROR)
    elif opt.level == "CRITICAL":
        logging.basicConfig(level=logging.CRITICAL)
    else:
        logging.basicConfig(level=logging.INFO)

    logger = logging.getLogger()
    logger.debug(f"Health check ({opt.connector}, {opt.timeout}s) -> {opt.host}:{opt.port}")

    tests = {
        "smtp": check_fuglu_smtp,
        "netcat": check_fuglu_netcat,
        "asmilter": check_fuglu_asmilter,
    }
    ts = time.time()
    returnval = tests.get(opt.connector, _fail)(host=opt.host, port=opt.port, timeout=opt.timeout)
    te = time.time()
    dt = te - ts

    logger.info(f"Health check ({opt.connector}, {opt.timeout}s) -> {opt.host}:{opt.port} "
                f"-> return: {returnval} in {dt:.2f}s")

    if opt.zabbix:
        # zabbix -> output return value as string
        print(returnval)
        sys.exit(0)
    else:
        sys.exit(returnval)
