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# coding=utf-8
#
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2023 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENSE.TXT

import argparse
import logging
import sys
from dataclasses import dataclass
from datetime import datetime
from typing import Self

import sqlalchemy as sa

import lvestats.lib.commons.decorators
from lvestats.lib.bursting.history import TableDoesNotExistError
from lvestats.lib.commons.argparse_utils import ParseDatetime
from lvestats.lib.commons.dateutil import local_to_gm
from lvestats.lib.commons.logsetup import setup_logging
from lvestats.lib.config import ConfigError, read_config
from lvestats.lib.dbengine import make_db_engine, MakeDbException
from lvestats.plugins.generic.burster.config import is_bursting_supported
from lvestats.plugins.generic.burster.common import Timestamp
from lvestats.plugins.generic.burster.storage.cleanup import cleanup_old_events

_log = setup_logging(
    {},
    caller_name='lve-bursting-cleanup',
    file_level=logging.WARNING,
    console_level=logging.ERROR,
)


@lvestats.lib.commons.decorators.no_sigpipe
def _main() -> None:
    if not is_bursting_supported():
        print('Bursting Limits feature is not supported in current environment')
        sys.exit(1)
    try:
        cfg = read_config()
        dbengine = make_db_engine(cfg=cfg)
        params = _Params.from_args_and_config(cfg, sys.argv[1:])
        cleanup_old_events(dbengine, params.server_id, params.cutoff)
    except TableDoesNotExistError as e:
        print(e.message)
        print('Enable Bursting Limits feature to create the table')
        sys.exit(1)
    except (sa.exc.OperationalError, sa.exc.ProgrammingError, ConfigError, MakeDbException) as e:
        _log.error('Error occurred while executing the "lve-bursting-cleanup" utility', exc_info=e)
        sys.exit(1)


@dataclass(frozen=True)
class _Params:
    @classmethod
    def from_args_and_config(cls, config: dict[str, str], argv: list[str]) -> Self:
        parser = argparse.ArgumentParser(
            description="Utility for trimming bursting limits history",
        )

        parser.add_argument(
            '--server-id',
            type=str,
            default=config.get('server_id', 'localhost'),
            help='used with central database for multiple servers, default "%(default)s"',
        )

        parser.add_argument(
            '-t', '--to',
            action=ParseDatetime,
            default=datetime.now(),
            nargs='+',
            help='cleanup records up to the specified date and time',
            metavar='YYYY-MM-DD[ HH:MM]',
            dest='cutoff',
        )

        namespace = parser.parse_args(argv)

        cutoff = local_to_gm(namespace.cutoff).timestamp()

        return cls(
            server_id=namespace.server_id,
            cutoff=Timestamp(int(cutoff)),
        )

    server_id: str
    cutoff: Timestamp


if __name__ == '__main__':
    _main()
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