# logger.py
import logging
import json
from pathlib import Path
import os

def _load_config():
    cfg_path = Path(__file__).parent / "config.json"
    if cfg_path.exists():
        try:
            return json.loads(cfg_path.read_text())
        except Exception:
            return {}
    return {}

def setup_logger():
    cfg = _load_config()
    logs_enabled = bool(cfg.get("logs", False))
    logs_path = cfg.get("logs_path", None)

    root_logger = logging.getLogger()
    # reset handlers (utile se viene richiamato più volte)
    root_logger.handlers = []

    formatter = logging.Formatter("%(asctime)s [%(levelname)s] %(message)s")

    # always add a stream handler so messages appear on console (useful for cron output)
    sh = logging.StreamHandler()
    sh.setFormatter(formatter)
    sh.setLevel(logging.INFO)
    root_logger.addHandler(sh)

    if logs_enabled:
        if logs_path is None:
            # default fallback
            logs_path = str(Path.home() / "backups" / "logs")
        log_dir = Path(logs_path)
        log_dir.mkdir(parents=True, exist_ok=True)
        fh = logging.FileHandler(log_dir / "backup.log")
        fh.setFormatter(formatter)
        fh.setLevel(logging.INFO)
        root_logger.addHandler(fh)

    root_logger.setLevel(logging.INFO)

    # informative note when file logging is disabled
    if not logs_enabled:
        root_logger.info("File logging disabled (config.json: logs=false)")
    else:
        root_logger.info(f"File logging enabled, log file: {logs_path}/backup.log")