class AppError(Exception):
    """应用业务异常"""


class DecisionError(AppError):
    """决策服务错误；仅暴露安全摘要及服务端追踪信息"""

    def __init__(
        self,
        message: str,
        *,
        kind: str,
        status: int | None = None,
        request_id: str | None = None,
    ):
        self.kind = kind
        self.status = status
        self.request_id = request_id
        super().__init__(message)


class ImportProcessError(AppError):
    """导入流程异常，保留节点名称和原始异常信息"""

    def __init__(
        self, message: str, node_name: str = "", cause: Exception | None = None
    ):
        self.node_name = node_name
        self.cause = cause
        super().__init__(message)

    def __str__(self) -> str:
        parts = []
        if self.node_name:
            parts.append(f"[{self.node_name}]")
        parts.append(super().__str__())
        if self.cause is not None:
            parts.append(f"(原因: {self.cause})")
        return " ".join(parts)