app.py

import streamlit as st
from langchain_google_genai import ChatGoogleGenerativeAI

# Set up API key
api_key = st.secrets["GOOGLE_API_KEY"]

st.title("The Chef Story Chatbot")

def get_bot_response(user_input):
    # Initialize the model with the API key
    llm = ChatGoogleGenerativeAI(model="gemini-pro", google_api_key=api_key)
    
    # Define prompts for specific questions
    if "menu" in user_input.lower():
        return format_menu()
    elif "special" in user_input.lower():
        return "Today's special is Grilled Salmon with Lemon Butter Sauce. Don't miss it!"
    elif "offers" in user_input.lower():
        return "We have a 20% discount on all orders above $50. Use code CHEF20 at checkout."
    elif "delivery" in user_input.lower():
        return "We offer home delivery for a minimal charge of $5. Free delivery for orders above $30."
    
    # For other questions, use the chatbot model
    prompt = f"User asked: {user_input}"
    response = llm.invoke(prompt)
    return response.content

def format_menu():
    menu = {
        "Italian": {
            "Margherita Pizza": "$12",
            "Pasta Carbonara": "$15"
        },
        "Chinese": {
            "Sweet and Sour Chicken": "$13",
            "Kung Pao Shrimp": "$14"
        },
        "Indian": {
            "Chicken Curry": "$16",
            "Paneer Tikka": "$14"
        },
        "Thai": {
            "Pad Thai": "$14",
            "Green Curry": "$15"
        },
        "Desserts": {
            "Cheesecake": "$8",
            "Chocolate Lava Cake": "$9"
        },
        "Kids Special": {
            "Chicken Nuggets": "$7",
            "Mini Pizzas": "$8"
        },
        "Low Calorie Foods": {
            "Grilled Chicken Salad": "$12",
            "Quinoa Bowl": "$11"
        }
    }

    menu_text = "Here is our full menu with prices:\n\n"
    for category, items in menu.items():
        menu_text += f"**{category}**:\n"
        for item, price in items.items():
            menu_text += f"- {item}: {price}\n"
        menu_text += "\n"
    return menu_text

# Create a Streamlit form
with st.form("chat_form"):
    user_input = st.text_input("You:")
    submitted = st.form_submit_button("Send")

    if submitted:
        if user_input:
            response = get_bot_response(user_input)
            st.write(f"Bot: {response}")
        else:
            st.error("Please enter a message.")