import json
import logging
from urllib.parse import urlsplit, urlunsplit


def redact_url(url: str) -> str:
    parts = urlsplit(url)
    host = parts.hostname or ""
    if ":" in host and not host.startswith("["):
        host = f"[{host}]"
    if parts.port is not None:
        host = f"{host}:{parts.port}"
    return urlunsplit((parts.scheme, host, parts.path, "", ""))


def log_event(logger: logging.Logger, event: str, **fields: object) -> None:
    safe = {key: redact_url(str(value)) if key == "url" else value for key, value in fields.items()}
    logger.info(json.dumps({"event": event, **safe}, default=str, sort_keys=True))


def configure_logging(level: str) -> None:
    logging.basicConfig(level=level.upper(), format="%(message)s")