from fastapi import FastAPI
from pydantic import BaseModel
import os, openai

client = openai.OpenAI(base_url="https://router.huggingface.co/v1",
                       api_key=os.environ["HF_TOKEN"])
MODEL = "Qwen/Qwen3-Next-80B-A3B-Instruct"

app = FastAPI()
hist = []

class M(BaseModel):
    msg: str

@app.post("/chat")
def chat(m: M):
    hist.append({"role": "user", "content": m.msg})
    r = client.chat.completions.create(model=MODEL, messages=hist)
    bot = r.choices[0].message.content
    hist.append({"role": "assistant", "content": bot})
    return {"reply": bot}