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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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import logging
from datetime import datetime

from sqlalchemy import and_
from sqlalchemy.exc import SQLAlchemyError

from superset import db
from superset.commands.base import BaseCommand
from superset.key_value.exceptions import KeyValueDeleteFailedError
from superset.key_value.models import KeyValueEntry
from superset.key_value.types import KeyValueResource

logger = logging.getLogger(__name__)


class DeleteExpiredKeyValueCommand(BaseCommand):
    resource: KeyValueResource

    def __init__(self, resource: KeyValueResource):
        """
        Delete all expired key-value pairs

        :param resource: the resource (dashboard, chart etc)
        :return: was the entry deleted or not
        """
        self.resource = resource

    def run(self) -> None:
        try:
            self.delete_expired()
        except SQLAlchemyError as ex:
            db.session.rollback()
            raise KeyValueDeleteFailedError() from ex

    def validate(self) -> None:
        pass

    def delete_expired(self) -> None:
        (
            db.session.query(KeyValueEntry)
            .filter(
                and_(
                    KeyValueEntry.resource == self.resource.value,
                    KeyValueEntry.expires_on <= datetime.now(),
                )
            )
            .delete()
        )
        db.session.commit()