from typing import Mapping, Any
from io import BytesIO

from backend.condition.lookups.uprn_lookup_s3 import UprnLookupS3
from utils.logger import setup_logger
from backend.condition.processor import process_file


logger = setup_logger()


def handler(event: Mapping[str, Any], context: Any) -> None:
    # Temporary stub for PoC wiring
    uprn_lookup = UprnLookupS3(
        bucket="", key=""
    )  # TODO: replace with postgres implementation
    dummy_stream = BytesIO(b"")

    source_key = event.get("source_key", "unknown-source")

    process_file(dummy_stream, source_key)