"""Logging setup (metadata-independent). Console + optional file under outputs/logs."""
import logging
import os
import sys

_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), "..", ".."))
LOG_DIR = os.path.join(_ROOT, "outputs", "logs")


def get_logger(name="s2sfmvn", level=logging.INFO, to_file=True):
    logger = logging.getLogger(name)
    if logger.handlers:
        return logger
    logger.setLevel(level)
    fmt = logging.Formatter("%(asctime)s %(name)s %(levelname)s %(message)s",
                            "%Y-%m-%d %H:%M:%S")
    sh = logging.StreamHandler(sys.stdout)
    sh.setFormatter(fmt)
    logger.addHandler(sh)
    if to_file:
        os.makedirs(LOG_DIR, exist_ok=True)
        fh = logging.FileHandler(os.path.join(LOG_DIR, f"{name}.log"))
        fh.setFormatter(fmt)
        logger.addHandler(fh)
    return logger