# sn_basis/functions/ly_visibility_wrapper.py

def is_layer_visible(layer) -> bool:
    """
    Prüft, ob ein Layer im Layer-Tree sichtbar ist.
    """
    if layer is None:
        return False

    try:
        node = getattr(layer, "treeLayer", None)
        if callable(node):
            tree_node = node()
            is_visible = getattr(tree_node, "isVisible", None)
            if callable(is_visible):
                return bool(is_visible())
    except Exception:
        pass

    return False


def set_layer_visible(layer, visible: bool) -> bool:
    """
    Setzt die Sichtbarkeit eines Layers im Layer-Tree.
    """
    if layer is None:
        return False

    try:
        node = getattr(layer, "treeLayer", None)
        if callable(node):
            tree_node = node()
            setter = getattr(tree_node, "setItemVisibilityChecked", None)
            if callable(setter):
                setter(bool(visible))
                return True
    except Exception:
        pass

    return False