import logging, sys, orjson
from logging.handlers import RotatingFileHandler
from pathlib import Path

class JsonFormatter(logging.Formatter):
    def format(self, record):
        payload = {
            "level": record.levelname,
            "msg": record.getMessage(),
            "name": record.name,
        }
        return orjson.dumps(payload).decode("utf-8")

def setup_logger(log_path: Path):
    log_path.parent.mkdir(parents=True, exist_ok=True)
    logger = logging.getLogger()
    logger.setLevel(logging.INFO)
    
    sh = logging.StreamHandler(sys.stdout)
    sh.setFormatter(JsonFormatter())
    logger.addHandler(sh)
    
    fh = RotatingFileHandler(log_path, maxBytes=5_000_000, backupCount=3)
    fh.setFormatter(JsonFormatter())
    logger.addHandler(fh)