app.py

from langchain_huggingface import HuggingFacePipeline
from transformers import pipeline
from langchain.agents import initialize_agent
from langchain.tools import Tool
from langchain_community.tools import DuckDuckGoSearchRun
from datetime import datetime
import pytz
import gradio as gr

# --- Tools ---
search_web = DuckDuckGoSearchRun()
search_tool = Tool("web_search", search_web.invoke, "Look up current info")

def calculator(query: str) -> str:
    try:
        return str(eval(query, {"__builtins__": None}, {}))
    except Exception as e:
        return f"Error: {e}"
calculator_tool = Tool("calculator_tool", calculator, "Arithmetic calculator")

def get_time(location: str) -> str:
    try:
        tz = pytz.timezone(location)
        return datetime.now(tz).strftime("The current time in %Z is %H:%M:%S.")
    except Exception as e:
        return f"Error: {e}"
time_tool = Tool("time_tool", get_time, "Time in a timezone")

tools = [search_tool, calculator_tool, time_tool]

# --- LLM ---
hf_pipeline = pipeline("text-generation", model="distilgpt2")
llm = HuggingFacePipeline(pipeline=hf_pipeline)

# --- Agent ---
agent = initialize_agent(
    tools,
    llm,
    agent_type="chat-conversational-react-description",
    verbose=True
)

# --- Gradio ---
def alfred_chat(user_input: str):
    return agent.run(user_input)

iface = gr.Interface(
    fn=alfred_chat,
    inputs=gr.Textbox(lines=2, placeholder="Ask Alfred something..."),
    outputs="text"
)

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