import vobject

def get_contact_name(card: vobject.vCard) -> str:
    """Extract best available display name from a vCard, never raises."""

    # 1. FN — formatted name, most reliable
    try:
        fn = card.contents["fn"][0].value.strip()
        if fn:
            return fn
    except (KeyError, IndexError, AttributeError):
        pass

    # 2. N — structured name: last, first, middle, prefix, suffix
    try:
        n = card.contents["n"][0].value
        parts = [n.prefix, n.given, n.additional, n.family, n.suffix]
        name = " ".join(p for p in parts if p and p.strip())
        if name.strip():
            return name.strip()
    except (KeyError, IndexError, AttributeError):
        pass

    # 3. ORG — organization name as last resort
    try:
        org = card.contents["org"][0].value
        # org can be a list ["Company", "Department"] or a string
        if isinstance(org, list):
            org = " / ".join(p for p in org if p and p.strip())
        if org and org.strip():
            return org.strip()
    except (KeyError, IndexError, AttributeError):
        pass

    # 4. EMAIL
    try:
        return card.contents["email"][0].value.strip()
    except (KeyError, IndexError, AttributeError):
        pass

    return "Unknown"