# Copyright (C) 2010-2023 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/

import os
import time
import logging

from rhodecode.lib.config_utils import get_app_config_lightweight

from rhodecode.lib.svn_txn_utils import get_txn_id_from_store

log = logging.getLogger(__name__)


class BaseHooksCallbackDaemon:
    """
    Basic context manager for actions that don't require some extra
    """
    def __init__(self):
        pass

    def __enter__(self):
        log.debug('Running `%s` callback daemon', self.__class__.__name__)
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        log.debug('Exiting `%s` callback daemon', self.__class__.__name__)


class HooksModuleCallbackDaemon(BaseHooksCallbackDaemon):

    def __init__(self, module):
        super().__init__()
        self.hooks_module = module

    def __repr__(self):
        return f'HooksModuleCallbackDaemon(hooks_module={self.hooks_module})'


def prepare_callback_daemon(extras, protocol, host, txn_id=None):

    match protocol:
        case 'http':
            from rhodecode.lib.hook_daemon.http_hooks_deamon import HttpHooksCallbackDaemon
            port = 0
            if txn_id:
                # read txn-id to re-use the PORT for callback daemon
                repo_path = os.path.join(extras['repo_store'], extras['repository'])
                txn_details = get_txn_id_from_store(repo_path, txn_id)
                port = txn_details.get('port', 0)

            callback_daemon = HttpHooksCallbackDaemon(
                txn_id=txn_id, host=host, port=port)
        case 'celery':
            from rhodecode.lib.hook_daemon.celery_hooks_deamon import CeleryHooksCallbackDaemon

            config = get_app_config_lightweight(extras['config'])
            task_queue = config.get('celery.broker_url')
            task_backend = config.get('celery.result_backend')

            callback_daemon = CeleryHooksCallbackDaemon(task_queue, task_backend)
        case 'local':
            from rhodecode.lib.hook_daemon.hook_module import Hooks
            callback_daemon = HooksModuleCallbackDaemon(Hooks.__module__)
        case _:
            log.error('Unsupported callback daemon protocol "%s"', protocol)
            raise Exception('Unsupported callback daemon protocol.')

    extras['hooks_uri'] = getattr(callback_daemon, 'hooks_uri', '')
    extras['task_queue'] = getattr(callback_daemon, 'task_queue', '')
    extras['task_backend'] = getattr(callback_daemon, 'task_backend', '')
    extras['hooks_protocol'] = protocol
    extras['time'] = time.time()

    # register txn_id
    extras['txn_id'] = txn_id
    log.debug('Prepared a callback daemon: %s',
              callback_daemon.__class__.__name__)
    return callback_daemon, extras