app.py

import streamlit as st
from dotenv import load_dotenv
from langchain_openai import ChatOpenAI
import os
load_dotenv("apiroute.env")
api_key=os.getenv("OPENAI_API_KEY")
api_base=os.getenv("OPENAI_API_BASE")
os.environ["OPENAI_API_KEY"]=api_key
os.environ['OPENAI_API_BASE']=api_base
llm=ChatOpenAI(model_name="google/gemma-3n-e2b-it:free",temperature=0.7)
# Streamlit UI
st.set_page_config(page_title="Chatbot", layout="centered")
st.title("💬 Chat with LLM")

# Chat history session state
if "history" not in st.session_state:
    st.session_state.history = []

# Prompt input
user_input = st.text_input("Ask me anything:", key="input")

# Handle input
if user_input:
    # Append user message
    st.session_state.history.append(("You", user_input))

    # Get response from LLM
    response = llm.invoke(user_input)

    # Append bot message
    st.session_state.history.append(("Bot", response.content))

# Display conversation
for sender, msg in st.session_state.history:
    st.markdown(f"**{sender}:** {msg}")