from __future__ import annotations
from pydantic import BaseModel, field_validator


class SelectorConfigSchema(BaseModel):
    questions: list = []
    rules: list = []

    @field_validator('questions', 'rules', mode='before')
    @classmethod
    def coerce_to_list(cls, v):
        if v is None:
            return []
        if isinstance(v, list):
            return v
        return []  # dict等旧格式数据降级为空列表


class SelectorConfigResponse(SelectorConfigSchema):
    id: int

    class Config:
        from_attributes = True