# get_available.dspy — 内部查询可用券（带规则预校验过滤；供结算方/调试）
customer_id = (params_kw.get('customer_id') or '').strip()
if not customer_id:
    customer_id = await get_userorgid() or ''
context = {}
for k in ('product_type', 'product_name'):
    if params_kw.get(k):
        context[k] = params_kw.get(k)
if params_kw.get('request_amount'):
    try:
        context['request_amount'] = float(params_kw.get('request_amount'))
    except (ValueError, TypeError):
        pass
return await get_available_vouchers_api(customer_id, context if context else None)