#
# This file is part of pretix (Community Edition).
#
# Copyright (C) 2014-2020  Raphael Michel and contributors
# Copyright (C) 2020-today pretix GmbH and contributors
#
# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
# Public License as published by the Free Software Foundation in version 3 of the License.
#
# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
# this file, see <https://pretix.eu/about/en/license>.
#
# 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 Affero 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
# <https://www.gnu.org/licenses/>.
#

# This file is based on an earlier version of pretix which was released under the Apache License 2.0. The full text of
# the Apache License 2.0 can be obtained at <http://www.apache.org/licenses/LICENSE-2.0>.
#
# This file may have since been changed and any changes are released under the terms of AGPLv3 as described above. A
# full history of changes and contributors is available at <https://github.com/pretix/pretix>.
#
# This file contains Apache-licensed contributions copyrighted by: Irmantas
#
# Unless required by applicable law or agreed to in writing, software distributed under the Apache License 2.0 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.

import time
import traceback

from django.conf import settings
from django.core.cache import cache
from django.core.management.base import BaseCommand
from django.db import close_old_connections
from django.dispatch.dispatcher import NO_RECEIVERS

from pretix.helpers.periodic import SKIPPED

from ...signals import periodic_task


class Command(BaseCommand):
    help = "Run periodic tasks"

    def add_arguments(self, parser):
        parser.add_argument('--tasks', action='store', type=str, help='Only execute the tasks with this name '
                                                                      '(dotted path, comma separation)')
        parser.add_argument('--list-tasks', action='store_true', help='Only list all tasks')
        parser.add_argument('--exclude', action='store', type=str, help='Exclude the tasks with this name '
                                                                        '(dotted path, comma separation)')

    def handle(self, *args, **options):
        verbosity = int(options['verbosity'])

        cache.set("pretix_runperiodic_executed", True, 3600 * 12)

        if not periodic_task.receivers or periodic_task.sender_receivers_cache.get(self) is NO_RECEIVERS:
            return

        for receiver in periodic_task._live_receivers(self):
            name = f'{receiver.__module__}.{receiver.__name__}'
            if options['list_tasks']:
                print(name)
                continue
            if options.get('tasks'):
                if name not in options.get('tasks').split(','):
                    continue
            if options.get('exclude'):
                if name in options.get('exclude').split(','):
                    continue

            if verbosity > 1:
                self.stdout.write(f'INFO Running {name}…')
            t0 = time.time()
            try:
                # Check if the DB connection is still good, it might be closed if the previous task took too long.
                close_old_connections()
                r = receiver(signal=periodic_task, sender=self)
            except Exception as err:
                if isinstance(err, KeyboardInterrupt):
                    raise err
                if settings.SENTRY_ENABLED:
                    from sentry_sdk import capture_exception
                    capture_exception(err)
                    self.stdout.write(self.style.ERROR(f'ERROR {name}: {str(err)}\n'))
                else:
                    self.stdout.write(self.style.ERROR(f'ERROR {name}: {str(err)}\n'))
                    traceback.print_exc()
            else:
                if options.get('verbosity') > 1:
                    if r is SKIPPED:
                        self.stdout.write(self.style.SUCCESS(f'INFO Skipped {name}'))
                    else:
                        self.stdout.write(self.style.SUCCESS(f'INFO Completed {name} in {round(time.time() - t0, 3)}s'))