app.py

import streamlit as st
import requests
import os

def deepseek_chat(prompt):
    response = requests.post(
        "https://api.siliconflow.cn/v1/chat/completions",
        headers={"Authorization": f"Bearer {os.getenv('DEEPSEEK_API_KEY')}"},
        json={
            "model": "deepseek-ai/DeepSeek-R1",
            "messages": [{"role": "user", "content": prompt}],
            "temperature": 0.7
        }
    )
    return response.json()["choices"][0]["message"]["content"]

st.title("DeepSeek Chat")
user_input = st.chat_input("Ask something...")

if "messages" not in st.session_state:
    st.session_state.messages = []

for msg in st.session_state.messages:
    st.chat_message(msg["role"]).write(msg["content"])

if user_input:
    st.session_state.messages.append({"role": "user", "content": user_input})
    st.chat_message("user").write(user_input)
    
    response = deepseek_chat(user_input)
    st.session_state.messages.append({"role": "assistant", "content": response})
    st.chat_message("assistant").write(response)