# Copyright 2024 The Pigweed Authors
#
# 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
#
#     https://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.
"""Abandon old changes owned by the current service account."""

from __future__ import annotations

from typing import TYPE_CHECKING

from recipe_engine import recipe_api

if TYPE_CHECKING:  # pragma: no cover
    from recipe_engine import config_types, engine_types


class AbandonOldChangesApi(recipe_api.RecipeApi):
    """Abandon old changes owned by the current service account."""

    def __call__(
        self,
        *,
        host: str,
        age_days: int = 30,
        continue_on_failure: bool = True,
        max_to_abandon: int = 10,
    ):
        with self.m.step.nest('abandon old changes'):
            try:
                self._abandon_old_changes(
                    host=self.m.gerrit.host_from_remote_url(host),
                    age_days=age_days,
                    max_to_abandon=max_to_abandon,
                )
                self.m.step.empty('success')

            except self.m.step.StepFailure:
                self.m.step.empty('failure')
                if not continue_on_failure:
                    raise  # pragma: no cover

    def _abandon_old_changes(
        self,
        *,
        host: str,
        age_days: int,
        max_to_abandon: int,
    ):
        query_string = (
            f'is:open '
            f'owner:{self.m.buildbucket.swarming_task_service_account} '
            f'age:{age_days}d '
        )

        changes = self.m.gerrit.change_query(
            name='get old changes',
            query_string=query_string,
            host=host,
            max_attempts=1,
            timeout=30,
            test_data=self.m.json.test_api.output(
                [
                    {'_number': 1001},
                    {'_number': 1002},
                ],
            ),
        ).json.output

        futures = []
        for change in changes[:max_to_abandon]:
            futures.append(
                self.m.futures.spawn(
                    self.m.gerrit.abandon,
                    f'abandon {change["_number"]}',
                    change_id=change['_number'],
                    message='Abandoning orphaned roll change.',
                    host=host,
                ),
            )

        self.m.futures.wait(futures)