from pathlib import Path
import json
import pandas as pd

def ensure_dir(p):
    p = Path(p)
    p.mkdir(parents=True, exist_ok=True)
    return p

def json_safe(obj):
    from pathlib import Path
    import numpy as np
    import pandas as pd

    if isinstance(obj, Path):
        return str(obj)
    if isinstance(obj, (str, int, float, bool)) or obj is None:
        return obj
    if isinstance(obj, dict):
        return {str(k): json_safe(v) for k, v in obj.items()}
    if isinstance(obj, (list, tuple)):
        return [json_safe(v) for v in obj]
    if isinstance(obj, pd.DataFrame):
        return obj.to_dict(orient="records")
    if isinstance(obj, np.ndarray):
        return obj.tolist()
    return obj  # fallback