def build_client_association(current_user, role_name, selected_partner_id=None):
    role = (role_name or '').lower()
    if role in ('system admin', 'firm admin'):
        return {
            'association_type': 'firm',
            'firm_tenant_id': getattr(current_user, 'tenant_id', None),
            'partner_user_id': selected_partner_id,
            'created_source': 'firm_admin',
        }
    if role == 'partner':
        return {
            'association_type': 'firm',
            'firm_tenant_id': getattr(current_user, 'tenant_id', None),
            'partner_user_id': current_user.id,
            'created_source': 'partner',
        }
    if role == 'consultant':
        return {
            'association_type': 'consultant',
            'consultant_id': current_user.id,
            'created_source': 'consultant',
        }
    return {
        'association_type': 'self_service_unassigned',
        'created_source': 'self_service',
    }