from pydantic import BaseModel, Field
from typing import Optional


class ChatRequest(BaseModel):
    session_id: Optional[str] = None
    message: str


class ChatResponse(BaseModel):
    session_id: str
    answer: str
    thought_chain: list[str]

class IntentBaseRequest(BaseModel):
    """统一入口基础请求（文本部分）"""
    session_id: Optional[str] = None
    message: str = Field(..., min_length=1, description="用户指令")