import gradio as gr
import requests

API_URL = "http://localhost:30000/v1/completions"
API_KEY = "token-abc123"
MODEL_NAME = "Qwen3-14b-base"

# 构造 prompt：Base 模型靠拼接上下文
def build_prompt(history, user_message):
    prompt = ""
    for user, bot in history:
        prompt += f"User: {user}\nAssistant: {bot}\n"
    prompt += f"User: {user_message}\nAssistant:"
    return prompt

# 主对话函数
def chat(user_message, history, max_tokens, temperature):
    prompt = build_prompt(history, user_message)

    headers = {
        "Authorization": f"Bearer {API_KEY}",
        "Content-Type": "application/json"
    }
    payload = {
        "model": MODEL_NAME,
        "prompt": prompt,
        "max_tokens": max_tokens,
        "temperature": temperature,
        "stop": ["\nUser:", "\nAssistant:"]
    }

    try:
        response = requests.post(API_URL, headers=headers, json=payload, timeout=30)
        result = response.json()
        reply = result["choices"][0]["text"].strip()
    except Exception as e:
        reply = f"[请求失败] {e}"

    return reply

# 手动测试 API 功能
def test_api_connection(max_tokens, temperature):
    headers = {
        "Authorization": f"Bearer {API_KEY}",
        "Content-Type": "application/json"
    }
    payload = {
        "model": MODEL_NAME,
        "prompt": "Ping?",
        "max_tokens": max_tokens,
        "temperature": temperature
    }

    try:
        resp = requests.post(API_URL, headers=headers, json=payload, timeout=10)
        out = resp.json()["choices"][0]["text"].strip()
        return f"✅ API 可用，响应: {out}"
    except Exception as e:
        return f"❌ API 请求失败: {e}"

# Gradio 控件组合
with gr.Blocks(title="Base 模型测试 UI") as demo:
    gr.Markdown("# 💬 Base 模型对话界面")

    with gr.Row():
        max_tokens = gr.Slider(32, 1024, value=256, label="max_tokens")
        temperature = gr.Slider(0.0, 1.5, value=0.7, step=0.05, label="temperature")
        test_btn = gr.Button("🔁 测试 API 可用性")
        test_output = gr.Textbox(label="API 测试结果", interactive=False)

    chatbot = gr.ChatInterface(
        fn=lambda msg, hist: chat(msg, hist, max_tokens.value, temperature.value),
        title=None
    )

    test_btn.click(fn=test_api_connection, inputs=[max_tokens, temperature], outputs=test_output)

# 启动服务
demo.launch(server_name="0.0.0.0", server_port=30001)
