#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Copyright 2021-2022 CERN
#
# 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.
#
# Authors:
# - Stefan Piperov <piperov@cern.ch>, 2021-2022

"""
Storage-Consistency-Actions is a daemon to trigger the
deletion of dark files and re-transfer missing files at
sites, as identified by the Storage-Consistency-Scanner.
"""

import argparse
import pathlib
import signal

from rucio.daemons.storage.consistency.actions import run, stop


def get_parser():
    """
    Returns the argparse parser.
    """
    parser = argparse.ArgumentParser(description="The Consistency-Actions daemon is responsible for applying the corrective actions resulting from a consistency-check scan of an RSE.", epilog='''
Run the daemon::
  $ rucio-storage-consistency-actions --run-once --scope cms --rses T2_US_Purdue T2_US_Nebraska --dark-threshold-percent 2.0 --miss-threshold-percent 1.5 --scanner-files-path /tmp/consistency-dump --sleep-time 10
    ''')
    parser.add_argument("--run-once", action="store_true", default=False, help='One iteration only')
    parser.add_argument("--scope", action="store", default=False, type=str,
                        help='Scope of the input files produced by theiCC scanner - e.g.: "cms" ')
    parser.add_argument("--rses", nargs='+', default=[], type=str,
                        help='RSEs to check, specified as a RSE expression. Defaults to check all RSEs.')
    parser.add_argument('--sleep-time', action="store", default=60, type=int,
                        help='Concurrency control: thread sleep time (in seconds) after each chunk of work')
    parser.add_argument('--dark-min-age', action="store", default=28, type=int,
                        help='Min. age (in days) of a file to be considered as DARK.')
    parser.add_argument('--dark-threshold-percent', action="store", default=1.0,
                        type=float, help='Max. percentage of dark files at RSE, expressed as percents - e.g. 1.5 means 1.5%%')
    parser.add_argument('--miss-threshold-percent', action="store", default=1.0,
                        type=float, help='Max. percentage of missing files at RSE, expressed as percents - e.g. 1.5 means 1.5%%')
    parser.add_argument('--scanner-files-path', action="store",
                        default="/var/cache/consistency-dump", type=pathlib.Path,
                        help='The path where the CC scanner files are mounted.')
    parser.add_argument("--threads", action="store", default=1, type=int,
                        help='Concurrency control: total number of threads on this process')
    parser.add_argument('-f', '--force-proceed', action="store_true", default=False,
                        help='Force CC actions, even if number of dark/missing files over thresholds')

    return parser


if __name__ == "__main__":
    signal.signal(signal.SIGTERM, stop)
    parser = get_parser()
    args = parser.parse_args()
    try:
        run(once=args.run_once, scope=args.scope, rses=args.rses, sleep_time=args.sleep_time,
            default_dark_min_age=args.dark_min_age,
            default_dark_threshold_percent=args.dark_threshold_percent,
            default_miss_threshold_percent=args.miss_threshold_percent,
            force_proceed=args.force_proceed,
            default_scanner_files_path=args.scanner_files_path,
            threads=args.threads)
    except KeyboardInterrupt:
        stop()
