src/buddy_fusion/boxes.py

"""Validate / repair a model-emitted box list so the renderer never receives
garbage. The freeform model is grammar-constrained to integers, but truncation
or odd values can still slip through; this clamps sizes and drops unusable boxes."""
from __future__ import annotations

_MAX = 8
_DEFAULT_COLOR = "#caa06f"


def _int(v):
    try:
        return int(v)
    except (TypeError, ValueError):
        return None


def repair_boxes(raw) -> list[dict]:
    if not isinstance(raw, list):
        return []
    out: list[dict] = []
    for b in raw:
        if not isinstance(b, dict):
            continue
        vals = {k: _int(b.get(k)) for k in ("x", "y", "z", "w", "h", "d")}
        if any(v is None for v in vals.values()):
            continue
        for k in ("w", "h", "d"):
            vals[k] = max(1, min(_MAX, vals[k]))
        color = b.get("color")
        if not isinstance(color, str) or not color.startswith("#"):
            color = _DEFAULT_COLOR
        out.append({**vals, "color": color})
    return out