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

from app.core.config import get_settings


class JsonFormatter(logging.Formatter):
    def format(self, record: logging.LogRecord) -> str:
        payload = {
            "timestamp": datetime.now(timezone.utc).isoformat(),
            "level": record.levelname,
            "logger": record.name,
            "message": record.getMessage(),
        }
        if hasattr(record, "request_id"):
            payload["request_id"] = record.request_id
        if record.exc_info:
            payload["exception"] = self.formatException(record.exc_info)
        return json.dumps(payload, ensure_ascii=False)


def configure_logging() -> None:
    settings = get_settings()
    handler = logging.StreamHandler(sys.stdout)
    handler.setFormatter(
        JsonFormatter() if settings.log_json
        else logging.Formatter("%(asctime)s | %(levelname)s | %(name)s | %(message)s")
    )
    root = logging.getLogger()
    root.handlers.clear()
    root.addHandler(handler)
    root.setLevel(settings.log_level.upper())