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from __future__ import annotations

from typing import TYPE_CHECKING, Any, NoReturn

from airflow.exceptions import AirflowSkipException
from airflow.sensors.base import BaseSensorOperator
from airflow.triggers.temporal import DateTimeTrigger
from airflow.utils import timezone

if TYPE_CHECKING:
    from airflow.utils.context import Context


class TimeDeltaSensor(BaseSensorOperator):
    """
    Waits for a timedelta after the run's data interval.

    :param delta: time length to wait after the data interval before succeeding.

    .. seealso::
        For more information on how to use this sensor, take a look at the guide:
        :ref:`howto/operator:TimeDeltaSensor`


    """

    def __init__(self, *, delta, **kwargs):
        super().__init__(**kwargs)
        self.delta = delta

    def poke(self, context: Context):
        target_dttm = context["data_interval_end"]
        target_dttm += self.delta
        self.log.info("Checking if the time (%s) has come", target_dttm)
        return timezone.utcnow() > target_dttm


class TimeDeltaSensorAsync(TimeDeltaSensor):
    """
    A deferrable drop-in replacement for TimeDeltaSensor.

    Will defers itself to avoid taking up a worker slot while it is waiting.

    :param delta: time length to wait after the data interval before succeeding.
    :param end_from_trigger: End the task directly from the triggerer without going into the worker.

    .. seealso::
        For more information on how to use this sensor, take a look at the guide:
        :ref:`howto/operator:TimeDeltaSensorAsync`

    """

    def __init__(self, *, end_from_trigger: bool = False, delta, **kwargs) -> None:
        super().__init__(delta=delta, **kwargs)
        self.end_from_trigger = end_from_trigger

    def execute(self, context: Context) -> bool | NoReturn:
        target_dttm = context["data_interval_end"]
        target_dttm += self.delta
        if timezone.utcnow() > target_dttm:
            # If the target datetime is in the past, return immediately
            return True
        try:
            trigger = DateTimeTrigger(moment=target_dttm, end_from_trigger=self.end_from_trigger)
        except (TypeError, ValueError) as e:
            if self.soft_fail:
                raise AirflowSkipException("Skipping due to soft_fail is set to True.") from e
            raise

        self.defer(trigger=trigger, method_name="execute_complete")

    def execute_complete(self, context: Context, event: Any = None) -> None:
        """Handle the event when the trigger fires and return immediately."""
        return None