"""Logging configuration."""

import logging
import sys


def configure_logging() -> None:
    """Configure root logger with structured formatting.

    Format: ISO-8601 timestamp, level, logger name, message.
    Secrets (AES keys, Woo passwords, inference keys) are never logged.
    """
    root = logging.getLogger()
    root.setLevel(logging.INFO)

    handler = logging.StreamHandler(sys.stdout)
    handler.setLevel(logging.INFO)

    formatter = logging.Formatter(
        "%(asctime)s %(levelname)s %(name)s: %(message)s",
        datefmt="%Y-%m-%dT%H:%M:%S%z",
    )
    handler.setFormatter(formatter)

    if not root.handlers:
        root.addHandler(handler)