"""Structured logging helpers for the GCMD classifier MVP."""

from __future__ import annotations

import logging
from typing import Any

_SECRET_MARKERS = ("api_key", "apikey", "authorization", "token", "secret", "password", "header")


def get_logger(name: str = "gcmd_classifier") -> logging.Logger:
    """Return a package logger without forcing global logging configuration."""
    return logging.getLogger(name)


def sanitize_log_details(details: dict[str, Any]) -> dict[str, Any]:
    """Remove values whose keys look like secrets or sensitive headers."""
    sanitized: dict[str, Any] = {}
    for key, value in details.items():
        lowered = key.lower()
        if any(marker in lowered for marker in _SECRET_MARKERS):
            sanitized[key] = "[REDACTED]"
        elif isinstance(value, dict):
            sanitized[key] = sanitize_log_details(value)
        else:
            sanitized[key] = value
    return sanitized


def log_event(logger: logging.Logger, event: str, **details: Any) -> None:
    """Emit a structured event through standard logging without secrets."""
    safe_details = sanitize_log_details(details)
    logger.info("gcmd_classifier_event", extra={"event": event, "details": safe_details})