#
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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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# software distributed under the License is distributed on an
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# KIND, either express or implied.  See the License for the
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from __future__ import annotations

from typing import TYPE_CHECKING, Any, Sequence

from airflow.sensors.base import BaseSensorOperator

if TYPE_CHECKING:
    from airflow.utils.context import Context


class WebHdfsSensor(BaseSensorOperator):
    """Waits for a file or folder to land in HDFS"""

    template_fields: Sequence[str] = ("filepath",)

    def __init__(self, *, filepath: str, webhdfs_conn_id: str = "webhdfs_default", **kwargs: Any) -> None:
        super().__init__(**kwargs)
        self.filepath = filepath
        self.webhdfs_conn_id = webhdfs_conn_id

    def poke(self, context: Context) -> bool:
        from airflow.providers.apache.hdfs.hooks.webhdfs import WebHDFSHook

        hook = WebHDFSHook(self.webhdfs_conn_id)
        self.log.info("Poking for file %s", self.filepath)
        return hook.check_for_path(hdfs_path=self.filepath)
