# Copyright (C) 2016-2023 RhodeCode GmbH
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License, version 3
# (only), as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# This program is dual-licensed. If you wish to learn more about the
# RhodeCode Enterprise Edition, including its added features, Support services,
# and proprietary license terms, please see https://rhodecode.com/licenses/

"""
WARNING: be really carefully with changing ANY imports in this file
# This script is to mean as really fast executable, doing some imports here that would yield an import chain change
# can affect execution times...
# This can be easily debugged using such command::
# time PYTHONPROFILEIMPORTTIME=1 rc-ssh-wrapper-v2 --debug --mode=test .dev/dev.ini
"""

import os
import sys
import time
import logging

import click

from rhodecode.config.config_maker import sanitize_settings_and_apply_defaults
from rhodecode.lib.statsd_client import StatsdClient
from rhodecode.lib.config_utils import get_app_config_lightweight

from .utils import setup_custom_logging
from .backends import SshWrapperStandalone

log = logging.getLogger(__name__)


@click.command()
@click.argument('ini_path', type=click.Path(exists=True))
@click.option(
    '--mode', '-m', required=False, default='auto',
    type=click.Choice(['auto', 'vcs', 'git', 'hg', 'svn', 'test']),
    help='mode of operation')
@click.option('--user', help='Username for which the command will be executed')
@click.option('--user-id', help='User ID for which the command will be executed')
@click.option('--key-id', help='ID of the key from the database')
@click.option('--shell', '-s', is_flag=True, help='Allow Shell')
@click.option('--debug', is_flag=True, help='Enabled detailed output logging')
def main(ini_path, mode, user, user_id, key_id, shell, debug):

    time_start = time.time()
    setup_custom_logging(ini_path, debug)

    command = os.environ.get('SSH_ORIGINAL_COMMAND', '')
    if not command and mode not in ['test']:
        raise ValueError(
            'Unable to fetch SSH_ORIGINAL_COMMAND from environment.'
            'Please make sure this is set and available during execution '
            'of this script.')

    # initialize settings and get defaults
    settings = get_app_config_lightweight(ini_path)
    settings = sanitize_settings_and_apply_defaults({'__file__': ini_path}, settings)

    # init and bootstrap StatsdClient
    StatsdClient.setup(settings)
    statsd = StatsdClient.statsd

    try:
        connection_info = os.environ.get('SSH_CONNECTION', '')
        env = {'RC_CMD_SSH_WRAPPER': '1'}
        ssh_wrapper = SshWrapperStandalone(
            command, connection_info, mode,
            user, user_id, key_id, shell, ini_path, settings, env)
    except Exception:
        log.exception('Failed to execute SshWrapper')
        sys.exit(-5)

    return_code = ssh_wrapper.wrap()
    operation_took = time.time() - time_start
    if statsd:
        operation_took_ms = round(1000.0 * operation_took)
        statsd.timing("rhodecode_ssh_wrapper_timing.histogram", operation_took_ms,
                      use_decimals=False)

    sys.exit(return_code)