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# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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
#
#   http://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.
import logging
from typing import Any, Dict, Optional

from flask_appbuilder.security.sqla.models import User

from superset import db, security_manager
from superset.commands.base import BaseCommand
from superset.common.chart_data import ChartDataResultType
from superset.common.query_context_factory import QueryContextFactory
from superset.common.utils.query_cache_manager import QueryCacheManager
from superset.constants import CacheRegion
from superset.dao.exceptions import DatasourceNotFound
from superset.datasource.dao import Datasource, DatasourceDAO
from superset.exceptions import SupersetSecurityException
from superset.explore.exceptions import (
    DatasourceForbiddenError,
    DatasourceSamplesFailedError,
)
from superset.utils.core import DatasourceType, QueryStatus

logger = logging.getLogger(__name__)


class SamplesDatasourceCommand(BaseCommand):
    def __init__(
        self,
        user: User,
        datasource_id: Optional[int],
        datasource_type: Optional[str],
        force: bool,
    ):
        self._actor = user
        self._datasource_id = datasource_id
        self._datasource_type = datasource_type
        self._force = force
        self._model: Optional[Datasource] = None

    def run(self) -> Dict[str, Any]:
        self.validate()
        if not self._model:
            raise DatasourceNotFound()

        qc_instance = QueryContextFactory().create(
            datasource={
                "type": self._model.type,
                "id": self._model.id,
            },
            queries=[{}],
            result_type=ChartDataResultType.SAMPLES,
            force=self._force,
        )
        results = qc_instance.get_payload()
        try:
            sample_data = results["queries"][0]
            error_msg = sample_data.get("error")
            if sample_data.get("status") == QueryStatus.FAILED and error_msg:
                cache_key = sample_data.get("cache_key")
                QueryCacheManager.delete(cache_key, region=CacheRegion.DATA)
                raise DatasourceSamplesFailedError(error_msg)
            return sample_data
        except (IndexError, KeyError) as exc:
            raise DatasourceSamplesFailedError from exc

    def validate(self) -> None:
        # Validate/populate model exists
        if self._datasource_type and self._datasource_id:
            self._model = DatasourceDAO.get_datasource(
                session=db.session,
                datasource_type=DatasourceType(self._datasource_type),
                datasource_id=self._datasource_id,
            )

        # Check ownership
        try:
            security_manager.raise_for_ownership(self._model)
        except SupersetSecurityException as ex:
            raise DatasourceForbiddenError() from ex