"""structlog configuration. Never log message contents (Loi 25)."""

from __future__ import annotations

import logging
import sys

import structlog

REDACT_KEYS = {"content", "message", "text", "code", "prompt", "email", "authorization"}


def _redact(_: object, __: str, event_dict: dict) -> dict:
    for key in list(event_dict):
        if key.lower() in REDACT_KEYS:
            value = event_dict[key]
            event_dict[key] = f"<redacted len={len(str(value))}>"
    return event_dict


def configure_logging(level: str = "INFO", json_output: bool = True) -> None:
    logging.basicConfig(level=level, stream=sys.stdout, format="%(message)s")
    renderer = structlog.processors.JSONRenderer() if json_output else structlog.dev.ConsoleRenderer()
    structlog.configure(
        processors=[
            structlog.contextvars.merge_contextvars,
            structlog.processors.add_log_level,
            structlog.processors.TimeStamper(fmt="iso"),
            _redact,
            renderer,
        ],
        wrapper_class=structlog.make_filtering_bound_logger(getattr(logging, level.upper(), 20)),
        logger_factory=structlog.PrintLoggerFactory(),
        cache_logger_on_first_use=True,
    )


def get_logger(name: str) -> structlog.stdlib.BoundLogger:
    return structlog.get_logger(name)