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# 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
#
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# KIND, either express or implied.  See the License for the
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from __future__ import annotations

import logging
from typing import TYPE_CHECKING, TypeVar

from airflow.providers.common.compat.sdk import DAG, Param, XComArg

if TYPE_CHECKING:
    from airflow.providers.common.compat.sdk import BaseOperator, MappedOperator
    from airflow.providers.openlineage.utils.utils import AnyOperator
    from airflow.serialization.definitions.dag import SerializedDAG

    T = TypeVar("T", bound=DAG | BaseOperator | MappedOperator)

ENABLE_OL_PARAM_NAME = "_selective_enable_ol"
ENABLE_OL_PARAM = Param(True, const=True)
DISABLE_OL_PARAM = Param(False, const=False)


log = logging.getLogger(__name__)


def enable_lineage(obj: T) -> T:
    """
    Set selective enable OpenLineage parameter to True.

    The method also propagates param to tasks if the object is DAG.
    """
    if isinstance(obj, XComArg):
        enable_lineage(obj.operator)
        return obj
    # propagate param to tasks
    if isinstance(obj, DAG):
        for task in obj.task_dict.values():
            enable_lineage(task)
    obj.params[ENABLE_OL_PARAM_NAME] = ENABLE_OL_PARAM
    return obj


def disable_lineage(obj: T) -> T:
    """
    Set selective enable OpenLineage parameter to False.

    The method also propagates param to tasks if the object is DAG.
    """
    if isinstance(obj, XComArg):
        disable_lineage(obj.operator)
        return obj
    # propagate param to tasks
    if isinstance(obj, DAG):
        for task in obj.task_dict.values():
            disable_lineage(task)
    obj.params[ENABLE_OL_PARAM_NAME] = DISABLE_OL_PARAM
    return obj


def is_task_lineage_enabled(task: AnyOperator) -> bool:
    """Check if selective enable OpenLineage parameter is set to True on task level."""
    if task.params.get(ENABLE_OL_PARAM_NAME) is False:
        log.debug(
            "OpenLineage event emission suppressed. Task for this functionality is selectively disabled."
        )
    return task.params.get(ENABLE_OL_PARAM_NAME) is True


def is_dag_lineage_enabled(dag: DAG | SerializedDAG) -> bool:
    """
    Check if DAG is selectively enabled to emit OpenLineage events.

    The method also checks if selective enable parameter is set to True
    or if any of the tasks in DAG is selectively enabled.
    """
    if dag.params.get(ENABLE_OL_PARAM_NAME) is False:
        log.debug(
            "OpenLineage event emission suppressed. DAG for this functionality is selectively disabled."
        )
    return dag.params.get(ENABLE_OL_PARAM_NAME) is True or any(
        is_task_lineage_enabled(task) for task in dag.tasks
    )
