"""加车结果。HTTP 客户端把商城回包收成这三种。"""
from __future__ import annotations

from dataclasses import dataclass

KIND_OK = "ok"
KIND_BUSINESS = "business"
KIND_SYSTEM = "system"


@dataclass
class AddOutcome:
    kind: str
    reason: str = ""


def classify_mall_message(text: str) -> AddOutcome:
    msg = (text or "").strip()
    if not msg:
        return AddOutcome(kind=KIND_SYSTEM, reason="加购失败")
    if any(token in msg for token in ("成功", "已加入")):
        return AddOutcome(kind=KIND_OK)
    if any(token in msg for token in ("中包装", "倍数", "起订")):
        reason = msg if "中包装" in msg else f"中包装加不进：{msg}"
        return AddOutcome(kind=KIND_BUSINESS, reason=reason)
    if any(token in msg for token in ("库存", "无货", "缺货")):
        return AddOutcome(kind=KIND_BUSINESS, reason="库存不足")
    return AddOutcome(kind=KIND_BUSINESS, reason=msg)