# utils.py
def prompt_weights(default_weights: dict) -> dict:
    """
    Interactively collect weights from the user (in %) and validate that they sum to 100.
    Press Enter to keep defaults.
    """
    print("\\n⚖️ Set Weights (press Enter to keep default values)")
    new_w = {}
    for key, val in default_weights.items():
        try:
            raw = input(f"  {key.replace('_WEIGHT','').title()} (%), default {val}: ").strip()
            new_w[key] = val if raw == "" else int(raw)
        except ValueError:
            print(f"  Invalid input for {key}, keeping default {val}.")
            new_w[key] = val
    
    total = sum(new_w.values())
    if total != 100:
        print(f"  Weights sum to {total}, normalizing to 100 proportionally.")
        factor = 100.0 / total if total else 0
        for k in new_w:
            new_w[k] = int(round(new_w[k] * factor))
        # ensure exact 100 by adjusting the largest key if rounding drift
        drift = 100 - sum(new_w.values())
        if drift != 0:
            largest_key = max(new_w.keys(), key=new_w.get)
            new_w[largest_key] += drift
    
    print("  Final Weights:", new_w)
    return new_w