#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# 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.

from airflow.ti_deps.deps.base_ti_dep import BaseTIDep
from airflow.utils import timezone
from airflow.utils.session import provide_session


class RunnableExecDateDep(BaseTIDep):
    NAME = "Execution Date"
    IGNOREABLE = True

    @provide_session
    def _get_dep_statuses(self, ti, session, dep_context):
        cur_date = timezone.utcnow()

        # don't consider runs that are executed in the future unless
        # specified by config and schedule_interval is None
        if ti.execution_date > cur_date and not ti.task.dag.allow_future_exec_dates:
            yield self._failing_status(
                reason="Execution date {0} is in the future (the current "
                       "date is {1}).".format(ti.execution_date.isoformat(),
                                              cur_date.isoformat()))

        if ti.task.end_date and ti.execution_date > ti.task.end_date:
            yield self._failing_status(
                reason="The execution date is {0} but this is after the task's end date "
                "{1}.".format(
                    ti.execution_date.isoformat(),
                    ti.task.end_date.isoformat()))

        if (ti.task.dag and
                ti.task.dag.end_date and
                ti.execution_date > ti.task.dag.end_date):
            yield self._failing_status(
                reason="The execution date is {0} but this is after the task's DAG's "
                "end date {1}.".format(
                    ti.execution_date.isoformat(),
                    ti.task.dag.end_date.isoformat()))
