from __future__ import annotations

import json
import logging
import sys
from datetime import datetime, timezone
from typing import Any


def setup_logging() -> logging.Logger:
    logger = logging.getLogger("photo_api")
    if logger.handlers:
        return logger

    logger.setLevel(logging.INFO)
    handler = logging.StreamHandler(sys.stdout)
    handler.setFormatter(logging.Formatter("%(message)s"))
    logger.addHandler(handler)
    return logger


def log_json(logger: logging.Logger, *, event: str, **fields: Any) -> None:
    payload: dict[str, Any] = {
        "ts": datetime.now(timezone.utc).isoformat(),
        "event": event,
        **fields,
    }
    logger.info(json.dumps(payload, ensure_ascii=False, separators=(",", ":")))