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import os

import gradio as gr
from openai import OpenAI
from huggingface_hub import InferenceClient
from tenacity import retry, wait_random_exponential, stop_after_attempt

OPENAI_KEY = os.getenv("OPENAI_KEY")
client = OpenAI(api_key=OPENAI_KEY)

def get_current_weather(location, unit="celsius"):
    """Get the current weather in a given location"""
    if "taipei" in location.lower():
        return json.dumps({"location": "Taipei", "temperature": "10", "unit": unit})
    else:
        return json.dumps({"location": location, "temperature": "unknown"})

@retry(wait=wait_random_exponential(multiplier=1, max=40), stop=stop_after_attempt(3))
def chat_completion_request(messages, tools=None, tool_choice=None):
    print(f'query message {messages}')
    try:
        response = client.chat.completions.create(
            model='gpt-4o',
            messages=messages,
            tools=tools,
            tool_choice=tool_choice,
        )
        print(response.choices[0].message.content)
        return response
    except Exception as e:
        print("Unable to generate ChatCompletion response")
        print(f"Exception: {e}")
        return e
        
tools = [
    {
        "type": "function",
        "function": {
            "name": "get_current_weather",
            "description": "Get the current weather",
            "parameters": {
                "type": "object",
                "properties": {
                    "location": {
                        "type": "string",
                        "description": "The city and state, e.g. San Francisco, CA",
                    },
                    "unit": {
                        "type": "string",
                        "enum": ["celsius", "fahrenheit"],
                        "description": "The temperature unit to use. Infer this from the users location.",
                    },
                },
                "required": ["location", "unit"],
            },
        }
    }
]


def respond(
    message,
    history: list[tuple[str, str]],
):
    messages = [{"role": "system", "content": [{'type': 'text', 'text': 'You are a helpful agent'}]}]
    for val in history:
        if val[0]:
            messages.append({"role": "user", "content": [{'type': 'text', 'text': val[0]}]})
        if val[1]:
            messages.append({"role": "assistant", "content": [{'type': 'text', 'text': val[1]}]})

    messages.append({"role": "user", "content": [{'type': 'text', 'text': message}]})

    response = chat_completion_request(messages, tools=tools, tool_choice='auto')

    response_message = response.choices[0].message
    tool_calls = response_message.tool_calls
    if tool_calls:
        available_functions = {
            "get_current_weather": get_current_weather,
        } 
        messages.append(response_message)
        for tool_call in tool_calls:
            function_name = tool_call.function.name
            function_to_call = available_functions[function_name]
            function_args = json.loads(tool_call.function.arguments)
            function_response = function_to_call(
                location=function_args.get("location"),
                unit=function_args.get("unit"),
            )
            messages.append(
                {
                    "tool_call_id": tool_call.id,
                    "role": "tool",
                    "name": function_name,
                    "content": function_response,
                }
            )  
        second_response = chat_completion_request(messages)
        messages.append({"role": "assistant", "content": [{'type': 'text', 'text': second_response.choices[0].message.content}]})
        return second_response.choices[0].message.content
    messages.append({"role": "assistant", "content": [{'type': 'text', 'text': response.choices[0].message.content}]})
    return response.choices[0].message.content

"""
For information on how to customize the ChatInterface, peruse the gradio docs: https://www.gradio.app/docs/chatinterface
"""
demo = gr.ChatInterface(
    respond,
)


if __name__ == "__main__":
    demo.launch()