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"""
Example use of LevelDB operators.
"""
from __future__ import annotations

import os
from datetime import datetime

import pytest

from airflow import models
from airflow.exceptions import AirflowOptionalProviderFeatureException

try:
    from airflow.providers.google.leveldb.operators.leveldb import LevelDBOperator
except AirflowOptionalProviderFeatureException:
    pytest.skip("LevelDB not available", allow_module_level=True)

from airflow.utils.trigger_rule import TriggerRule

ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID")
DAG_ID = "example_leveldb"

with models.DAG(
    DAG_ID,
    start_date=datetime(2021, 1, 1),
    schedule="@once",
    catchup=False,
    tags=["example"],
) as dag:
    # [START howto_operator_leveldb_get_key]
    get_key_leveldb_task = LevelDBOperator(task_id="get_key_leveldb", command="get", key=b"key")
    # [END howto_operator_leveldb_get_key]
    # [START howto_operator_leveldb_put_key]
    put_key_leveldb_task = LevelDBOperator(
        task_id="put_key_leveldb",
        command="put",
        key=b"another_key",
        value=b"another_value",
        trigger_rule=TriggerRule.ALL_DONE,
    )
    # [END howto_operator_leveldb_put_key]
    get_key_leveldb_task >> put_key_leveldb_task

    from tests.system.utils.watcher import watcher

    # This test needs watcher in order to properly mark success/failure
    # when "tearDown" task with trigger rule is part of the DAG
    list(dag.tasks) >> watcher()


from tests.system.utils import get_test_run  # noqa: E402

# Needed to run the example DAG with pytest (see: tests/system/README.md#run_via_pytest)
test_run = get_test_run(dag)
