from fastapi import FastAPI, Depends, HTTPException  
from api import swl_jwt  
from grpc_m.proto import vector_service_pb2, vector_service_pb2_grpc  
import grpc  
  
app = FastAPI()  
  
# gRPC 通道设置  
channel = grpc.insecure_channel('localhost:18600')  
stub = vector_service_pb2_grpc.VectorServiceStub(channel)  
  
@app.post("/chat")  
async def chat(user_id: str, doc_id: str, message: str, token: str = Depends(swl_jwt.get_token)):  
    # 鉴权逻辑（根据实际情况进行修改）  
    # ...  
      
    # 调用 LangChain 微服务进行对话处理  
    response = stub.ChatWithDoc(vector_service_pb2.ChatWithDocRequest(  
        user_id=user_id,  
        doc_id=doc_id,  
        message=message  
    ))  
      
    # 处理响应结果并返回给前端用户  
    if response.status == vector_service_pb2.ErrorCode.SUCCESS:  
        return {"reply": response.reply}  
    else:  
        raise HTTPException(status_code=500, detail="Internal server error")