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app.py

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+import streamlit as st
+from datetime import datetime
+
+# Enhanced bot function with more responses
+def ask_bot(question):
+    """
+    Enhanced chatbot function with more comprehensive responses
+    """
+    question_lower = question.lower()
+    
+    if "return" in question_lower and "policy" in question_lower:
+        return """
+**📋 Return Policy**
+- 30-day hassle-free return policy
+- Items must be in original condition with tags attached
+- Free return shipping for orders over $50
+- Start your return process in your account dashboard
+        """
+    
+    elif "track" in question_lower and "order" in question_lower:
+        return """
+**📦 Order Tracking**
+You can track your order in several ways:
+- Check your email for the tracking link sent after purchase
+- Log into your account and visit 'My Orders'
+- Use our tracking page with your order number
+- Contact support for real-time updates
+        """
+    
+    elif "laptop" in question_lower or "computer" in question_lower:
+        return """
+**💻 Latest Laptops**
+We have amazing deals on:
+- **Dell XPS Series** - Premium ultrabooks starting at $899
+- **HP Pavilion** - Great for students, from $649
+- **MacBook Air M2** - Latest Apple technology, $1,199
+- **Gaming Laptops** - ASUS ROG and MSI starting at $999
+
+All laptops come with free shipping and setup support!
+        """
+    
+    elif "warranty" in question_lower:
+        return """
+**🛡️ Warranty Information**
+- **Standard**: 1-year manufacturer warranty on all products
+- **Extended**: 2-3 year extended warranties available
+- **Premium Care**: Includes accidental damage protection
+- **On-site Support**: Available for electronics over $500
+
+Warranty registration is automatic with purchase!
+        """
+    
+    elif "shipping" in question_lower or "delivery" in question_lower:
+        return """
+**🚚 Shipping & Delivery**
+- **Free Standard Shipping** on orders over $35 (3-5 business days)
+- **Express Delivery** $9.99 (1-2 business days)
+- **Same Day** available in major cities for $19.99
+- **International Shipping** to 50+ countries
+
+All orders ship within 24 hours on business days!
+        """
+    
+    elif "payment" in question_lower or "pay" in question_lower:
+        return """
+**💳 Payment Options**
+We accept all major payment methods:
+- Credit/Debit Cards (Visa, MasterCard, American Express)
+- PayPal and PayPal Pay in 4
+- Apple Pay and Google Pay
+- Buy Now, Pay Later with Klarna
+- Gift cards and store credit
+
+All transactions are secured with 256-bit SSL encryption.
+        """
+    
+    elif "contact" in question_lower or "support" in question_lower:
+        return """
+**📞 Contact Support**
+Our customer service team is here to help!
+- **Live Chat**: Available 24/7 on our website
+- **Phone**: 1-800-SHOP-NOW (Mon-Fri 9AM-8PM EST)
+- **Email**: support@ecommerce.com
+- **Social Media**: @EcommerceStore on Twitter/Facebook
+
+Average response time: Live Chat <2 minutes, Email <4 hours
+        """
+    
+    elif "price" in question_lower or "discount" in question_lower or "deal" in question_lower:
+        return """
+**🏷️ Current Deals**
+Amazing offers available now!
+- **Weekly Deals**: Up to 40% off selected items
+- **Student Discount**: 10% off with valid student ID
+- **Newsletter Signup**: Get 15% off your first order
+- **Bulk Orders**: Special pricing for quantities over 10
+
+Check our deals page for flash sales and limited-time offers!
+        """
+    
+    elif "hello" in question_lower or "hi" in question_lower or "hey" in question_lower:
+        return """
+**👋 Hello there!**
+Welcome to our E-commerce AI Assistant! I'm here to help you with:
+- Product information and recommendations
+- Order tracking and returns
+- Shipping and payment questions
+- Technical support
+
+How can I assist you today?
+        """
+    
+    else:
+        return f"""
+**🤔 I'd love to help you!**
+While I don't have specific information about '{question}' right now, I can definitely assist you with:
+
+- **Product Info** - Laptops, electronics, and more
+- **Orders** - Tracking, returns, and shipping
+- **Support** - Payments, warranties, and general help
+
+Try asking about any of these topics, or contact our live support for specialized assistance!
+        """
+
+# Page configuration
+st.set_page_config(
+    page_title="ShopSmart AI Assistant",
+    page_icon="🛍️",
+    layout="wide",
+    initial_sidebar_state="expanded"
+)
+
+# Initialize session state
+if "conversation" not in st.session_state:
+    st.session_state.conversation = []
+if "message_count" not in st.session_state:
+    st.session_state.message_count = 0
+
+# Header
+st.title("🛍️ ShopSmart AI Assistant")
+st.subheader("Your intelligent shopping companion - Ask me anything!")
+
+# Sidebar
+with st.sidebar:
+    st.header("🚀 Quick Questions")
+    st.divider()
+    
+    recommended_questions = [
+        "What is the return policy?",
+        "How can I track my order?",
+        "Show me latest laptops",
+        "What are shipping options?",
+        "Any current deals or discounts?"
+    ]
+    
+    for i, question in enumerate(recommended_questions):
+        if st.button(f"💬 {question}", key=f"quick_q_{i}", use_container_width=True):
+            response = ask_bot(question)
+            st.session_state.conversation.append({
+                "user": question,
+                "bot": response,
+                "timestamp": datetime.now().strftime("%H:%M")
+            })
+            st.session_state.message_count += 1
+            st.rerun()
+    
+    st.divider()
+    
+    # Stats section
+    st.header("📊 Chat Statistics")
+    
+    col1, col2 = st.columns(2)
+    with col1:
+        st.metric("Messages Sent", st.session_state.message_count)
+    
+    with col2:
+        st.metric("Conversations", len(st.session_state.conversation))
+    
+    st.divider()
+    
+    if st.button("🗑️ Clear Chat History", type="secondary", use_container_width=True):
+        st.session_state.conversation = []
+        st.session_state.message_count = 0
+        st.success("Chat history cleared!")
+        st.rerun()
+
+# Main chat area
+st.header("💬 Chat")
+
+# Display conversation or welcome message
+if not st.session_state.conversation:
+    st.info("""
+    🛍️ **ShopSmart Assistant** - Your 24/7 shopping companion
+    
+    Ready to help with orders, products, returns, and more!
+    
+    ⚡ **Quick Start:** Use sidebar buttons or ask directly below
+    """)
+else:
+    # Create a container for chat messages
+    chat_container = st.container()
+    
+    with chat_container:
+        for i, turn in enumerate(st.session_state.conversation):
+            # Display messages with proper formatting
+            with st.expander(f"💬 Conversation #{i+1} - {turn.get('timestamp', '')}", expanded=True):
+                # User message
+                st.write(f"**You:** {turn['user']}")
+                
+                # Bot response
+                st.success(turn['bot'])
+
+st.divider()
+
+# Input form
+st.subheader("✍️ Ask a Question")
+
+with st.form(key="chat_form", clear_on_submit=True):
+    # Create columns for input and button
+    col1, col2 = st.columns([4, 1])
+    
+    with col1:
+        user_input = st.text_input(
+            "Type your message here:", 
+            placeholder="Ask about products, orders, returns, or anything else!",
+            label_visibility="collapsed"
+        )
+    
+    with col2:
+        st.write("")  # Add some spacing
+        send_button = st.form_submit_button(
+            "Send 📤", 
+            type="primary",
+            use_container_width=True
+        )
+
+# Process user input
+if send_button and user_input.strip():
+    # Get bot response
+    bot_response = ask_bot(user_input)
+    
+    # Add to conversation
+    st.session_state.conversation.append({
+        "user": user_input,
+        "bot": bot_response,
+        "timestamp": datetime.now().strftime("%H:%M")
+    })
+    st.session_state.message_count += 1
+    
+    # Show success message
+    st.success(f"Message sent: '{user_input}'")
+    
+    # Rerun to update the display
+    st.rerun()
+
+# Footer information
+st.divider()
+
+# Create columns for footer info
+footer_col1, footer_col2, footer_col3 = st.columns(3)
+
+with footer_col1:
+    st.info("""
+    **🕐 Available 24/7**
+    Our AI assistant is always ready to help you with your shopping needs.
+    """)
+
+with footer_col2:
+    st.info("""
+    **📞 Need Human Support?**
+    Contact us at support@shopmart.com or call 1-800-SHOP-NOW
+    """)
+
+with footer_col3:
+    st.info("""
+    **🔒 Secure & Private**
+    Your conversations are secure and we respect your privacy.
+    """)
+
+# Additional help section
+with st.expander("❓ Need Help Using This Assistant?"):
+    st.write("""
+    **How to use the ShopSmart AI Assistant:**
+    
+    1. **Quick Questions**: Click any button in the sidebar for instant answers
+    2. **Custom Questions**: Type your own question in the input field below
+    3. **View History**: All conversations are saved and displayed above
+    4. **Clear History**: Use the sidebar button to clear all conversations
+    
+    **What I can help with:**
+    - Product information and recommendations
+    - Order tracking and status updates
+    - Return and exchange policies
+    - Shipping and delivery options
+    - Payment methods and security
+    - Warranty and support information
+    - Current deals and promotions
+    
+    **Tips for better responses:**
+    - Be specific in your questions
+    - Include relevant details (product names, order numbers, etc.)
+    - Ask one question at a time for clearer answers
+    """)

faqs.json

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+[
+  {
+    "question": "How can I track my order?",
+    "answer": "You can track your order by logging into your account, going to 'My Orders', and clicking on 'Track Order'."
+  },
+  {
+    "question": "What payment methods do you accept?",
+    "answer": "We accept credit/debit cards, PayPal, Cash on Delivery, and bank transfers."
+  },
+  {
+    "question": "How long does delivery take?",
+    "answer": "Standard delivery takes 3–5 business days. Express delivery is available within 24–48 hours in major cities."
+  },
+  {
+    "question": "Can I return or exchange a product?",
+    "answer": "Yes, you can return or exchange products within 7 days if they are unused, undamaged, and in original packaging."
+  },
+  {
+    "question": "Do you ship internationally?",
+    "answer": "Currently, we only ship within Pakistan. International shipping will be available soon."
+  },
+  {
+    "question": "What is your refund policy?",
+    "answer": "Refunds are issued within 5–7 business days after we receive and inspect the returned item."
+  },
+  {
+    "question": "Do your products come with a warranty?",
+    "answer": "Yes, most electronics come with a 1-year manufacturer warranty. Please check the product details for warranty coverage."
+  },
+  {
+    "question": "What should I do if I receive a damaged product?",
+    "answer": "If your order arrives damaged, please contact our support within 48 hours with photos, and we’ll arrange a replacement or refund."
+  },
+  {
+    "question": "How can I contact customer support?",
+    "answer": "You can reach our support team via live chat on the website, email at support@example.com, or call us at +92-300-1234567."
+  }
+]

main.py

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+from langchain_google_genai import ChatGoogleGenerativeAI
+from langchain_community.document_loaders import TextLoader
+from langchain.text_splitter import RecursiveCharacterTextSplitter
+from langchain_google_genai import GoogleGenerativeAIEmbeddings
+from langchain_community.vectorstores import FAISS
+from dotenv import load_dotenv
+
+load_dotenv()
+
+llm = ChatGoogleGenerativeAI(model="gemini-1.5-flash")
+
+embeddings = GoogleGenerativeAIEmbeddings(model="models/text-embedding-004")
+
+# --- Load products ---
+loader = TextLoader("products.json")
+docs = loader.load()
+splitter = RecursiveCharacterTextSplitter(chunk_size=1000, chunk_overlap=100)
+text = splitter.split_documents(docs)
+product_store = FAISS.from_documents(documents=text, embedding=embeddings)
+
+# --- Load FAQs ---
+loader = TextLoader("faqs.json")
+docs = loader.load()
+splitter = RecursiveCharacterTextSplitter(chunk_size=1000, chunk_overlap=100)
+text = splitter.split_documents(docs)
+faq_store = FAISS.from_documents(documents=text, embedding=embeddings)
+
+# --- Retrievers ---
+product_retriever = product_store.as_retriever(search_kwargs={"k": 3})
+faq_retriever = faq_store.as_retriever(search_kwargs={"k": 3})
+
+# --- Keywords ---
+FAQ_KEYWORDS = {
+    "delivery", "ship", "shipping", "return", "refund", "warranty",
+    "payment", "pay", "exchange", "order", "track", "policy"
+}
+PRODUCT_KEYWORDS = {
+    "price", "spec", "specs", "specifications", "feature", "features",
+    "compare", "details", "model", "brand", "laptop", "mobile",
+    "phone", "shoes", "camera", "ram", "ssd", "storage", "gpu", "cpu"
+}
+
+# --- Conversation history ---
+conversation_history = []
+
+# --- Functions ---
+def get_relevant_retriever(query: str):
+    q = query.lower()
+    if any(word in q for word in FAQ_KEYWORDS):
+        return faq_retriever
+    elif any(word in q for word in PRODUCT_KEYWORDS):
+        return product_retriever
+    else:
+        return product_retriever  # default
+
+def ask_bot(query: str):
+    retriever = get_relevant_retriever(query)
+    docs = retriever.get_relevant_documents(query)
+    context = "\n".join([d.page_content for d in docs])
+
+    # --- Add previous conversation history to context ---
+    history_text = ""
+    for turn in conversation_history[-6:]:  # last 3 user-bot pairs
+        history_text += f"User: {turn['user']}\nBot: {turn['bot']}\n"
+
+    full_prompt = f"{history_text}\nContext:\n{context}\n\nUser question: {query}\nAnswer:"
+    response = llm.invoke(full_prompt)
+
+    # --- Save this turn to history ---
+    conversation_history.append({"user": query, "bot": response.content})
+
+    return response.content
+
+# --- Main Loop ---
+if __name__ == "__main__":
+    print("Chatbot started. Type 'exit' or 'quit' to stop.\n")
+    while True:
+        query = input("You: ")
+        if query.lower() in ["exit", "quit", "q"]:
+            break
+        answer = ask_bot(query)
+        print("Bot:", answer)

products.json

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+[
+  {
+    "id": 1,
+    "name": "HP Omen 15",
+    "category": "laptop",
+    "price": 48000,
+    "brand": "HP",
+    "specs": "15.6-inch Full HD Display, Intel Core i5-10300H, 16GB DDR4 RAM, NVIDIA GTX 1660Ti 6GB, 512GB NVMe SSD, Windows 11",
+    "features": ["Gaming Performance", "RGB Keyboard", "Bang & Olufsen Audio", "Fast Charging"],
+    "rating": 4.5,
+    "availability": "In Stock",
+    "warranty": "1 Year International Warranty",
+    "description": "Perfect gaming laptop for enthusiasts with powerful graphics and high-speed performance"
+  },
+  {
+    "id": 2,
+    "name": "Dell G5 Gaming",
+    "category": "laptop",
+    "price": 50000,
+    "brand": "Dell",
+    "specs": "15.6-inch Full HD 120Hz, Intel Core i7-10750H, 16GB DDR4 RAM, NVIDIA RTX 3050 4GB, 1TB NVMe SSD, Windows 11",
+    "features": ["120Hz Refresh Rate", "Game Shift Technology", "Dual Fan Cooling", "RGB Lighting"],
+    "rating": 4.6,
+    "availability": "In Stock",
+    "warranty": "2 Year Premium Support",
+    "description": "High-performance gaming laptop with advanced cooling and stunning visuals"
+  },
+  {
+    "id": 3,
+    "name": "Asus TUF Gaming F15",
+    "category": "laptop",
+    "price": 46000,
+    "brand": "Asus",
+    "specs": "15.6-inch Full HD IPS, Intel Core i5-10300H, 8GB DDR4 RAM, NVIDIA GTX 1650 4GB, 512GB NVMe SSD, Windows 11",
+    "features": ["Military Grade Durability", "HyperCool Technology", "RGB Keyboard", "DTS Audio"],
+    "rating": 4.3,
+    "availability": "In Stock",
+    "warranty": "1 Year International Warranty",
+    "description": "Durable gaming laptop built for intense gaming sessions with military-grade toughness"
+  },
+  {
+    "id": 4,
+    "name": "MacBook Air M2",
+    "category": "laptop",
+    "price": 125000,
+    "brand": "Apple",
+    "specs": "13.6-inch Liquid Retina, Apple M2 Chip, 8GB Unified Memory, 256GB SSD, macOS Monterey",
+    "features": ["All-Day Battery Life", "Ultra-Thin Design", "MagSafe Charging", "Touch ID"],
+    "rating": 4.8,
+    "availability": "In Stock",
+    "warranty": "1 Year AppleCare",
+    "description": "Ultra-portable laptop with Apple's latest M2 chip for professional productivity"
+  },
+  {
+    "id": 5,
+    "name": "Lenovo ThinkPad E15",
+    "category": "laptop",
+    "price": 65000,
+    "brand": "Lenovo",
+    "specs": "15.6-inch Full HD, Intel Core i7-1165G7, 16GB DDR4 RAM, Intel Iris Xe Graphics, 512GB NVMe SSD, Windows 11 Pro",
+    "features": ["Business Grade Security", "Spill-Resistant Keyboard", "Rapid Charge", "HD Camera"],
+    "rating": 4.4,
+    "availability": "In Stock",
+    "warranty": "3 Year On-Site Warranty",
+    "description": "Professional business laptop with enterprise-grade security and reliability"
+  },
+  {
+    "id": 6,
+    "name": "Samsung Galaxy S21",
+    "category": "mobile",
+    "price": 70000,
+    "brand": "Samsung",
+    "specs": "6.2-inch Dynamic AMOLED 2X, Exynos 2100, 8GB RAM, 128GB Storage, 64MP Triple Camera, 4000mAh Battery",
+    "features": ["5G Ready", "Wireless Charging", "IP68 Water Resistant", "120Hz Display"],
+    "rating": 4.6,
+    "availability": "In Stock",
+    "warranty": "1 Year Manufacturer Warranty",
+    "description": "Premium flagship smartphone with professional-grade camera system and 5G connectivity"
+  },
+  {
+    "id": 7,
+    "name": "iPhone 13",
+    "category": "mobile",
+    "price": 95000,
+    "brand": "Apple",
+    "specs": "6.1-inch Super Retina XDR, A15 Bionic Chip, 4GB RAM, 128GB Storage, 12MP Dual Camera System, Lightning Port",
+    "features": ["Face ID", "MagSafe Compatible", "Ceramic Shield", "iOS 15"],
+    "rating": 4.7,
+    "availability": "In Stock",
+    "warranty": "1 Year Limited Warranty",
+    "description": "Latest iPhone with advanced A15 Bionic chip and professional photography capabilities"
+  },
+  {
+    "id": 8,
+    "name": "OnePlus 10 Pro",
+    "category": "mobile",
+    "price": 85000,
+    "brand": "OnePlus",
+    "specs": "6.7-inch Fluid AMOLED, Snapdragon 8 Gen 1, 12GB RAM, 256GB Storage, 48MP Hasselblad Camera, 5000mAh Battery",
+    "features": ["65W SuperVOOC Charging", "Hasselblad Partnership", "120Hz LTPO 2.0", "OxygenOS 12"],
+    "rating": 4.5,
+    "availability": "In Stock",
+    "warranty": "1 Year Manufacturer Warranty",
+    "description": "Flagship killer with Hasselblad-tuned cameras and ultra-fast charging technology"
+  },
+  {
+    "id": 9,
+    "name": "Xiaomi 12 Pro",
+    "category": "mobile",
+    "price": 65000,
+    "brand": "Xiaomi",
+    "specs": "6.73-inch AMOLED, Snapdragon 8 Gen 1, 8GB RAM, 128GB Storage, 50MP Triple Camera, 4600mAh Battery",
+    "features": ["120W HyperCharge", "50MP Ultra-Wide", "Harman Kardon Audio", "MIUI 13"],
+    "rating": 4.4,
+    "availability": "In Stock",
+    "warranty": "1 Year Manufacturer Warranty",
+    "description": "High-performance smartphone with incredibly fast charging and premium camera system"
+  },
+  {
+    "id": 10,
+    "name": "Nike Air Zoom Pegasus 38",
+    "category": "shoes",
+    "price": 12000,
+    "brand": "Nike",
+    "specs": "Running Shoes, Mesh Upper, Zoom Air Units, React Foam Midsole, Size Range: 7-11",
+    "features": ["Zoom Air Technology", "Breathable Mesh", "Durable Rubber Outsole", "Lightweight Design"],
+    "rating": 4.7,
+    "availability": "In Stock",
+    "warranty": "6 Months Manufacturing Defect",
+    "description": "Premium running shoes with responsive cushioning for daily runs and training"
+  },
+  {
+    "id": 11,
+    "name": "Adidas Ultraboost 21",
+    "category": "shoes",
+    "price": 15000,
+    "brand": "Adidas",
+    "specs": "Casual/Running Shoes, Primeknit Upper, Boost Midsole, Continental Rubber Outsole, Size Range: 7-12",
+    "features": ["Boost Energy Return", "Primeknit Upper", "Torsion System", "Continental Rubber"],
+    "rating": 4.8,
+    "availability": "In Stock",
+    "warranty": "6 Months Manufacturing Defect",
+    "description": "Revolutionary running shoes with maximum energy return and superior comfort"
+  },
+  {
+    "id": 12,
+    "name": "Puma RS-X3",
+    "category": "shoes",
+    "price": 9000,
+    "brand": "Puma",
+    "specs": "Lifestyle Sneakers, Synthetic Leather Upper, RS Foam Midsole, Rubber Outsole, Size Range: 6-11",
+    "features": ["Retro Design", "Bold Colors", "Cushioned Sole", "Durable Construction"],
+    "rating": 4.3,
+    "availability": "In Stock",
+    "warranty": "6 Months Manufacturing Defect",
+    "description": "Bold lifestyle sneakers with retro-futuristic design and comfortable cushioning"
+  },
+  {
+    "id": 13,
+    "name": "Canon EOS R5",
+    "category": "camera",
+    "price": 350000,
+    "brand": "Canon",
+    "specs": "45MP Full-Frame CMOS Sensor, DIGIC X Processor, 8K Video Recording, In-Body Image Stabilization, RF Mount",
+    "features": ["8K Video Recording", "45MP Resolution", "In-Body Stabilization", "Dual Card Slots"],
+    "rating": 4.9,
+    "availability": "Limited Stock",
+    "warranty": "2 Year International Warranty",
+    "description": "Professional mirrorless camera with groundbreaking 8K video and exceptional image quality"
+  },
+  {
+    "id": 14,
+    "name": "Sony A7 IV",
+    "category": "camera",
+    "price": 280000,
+    "brand": "Sony",
+    "specs": "33MP Full-Frame Exmor R Sensor, BIONZ XR Processor, 4K 60p Video, 5-Axis Stabilization, E Mount",
+    "features": ["33MP Resolution", "Real-time Eye AF", "4K 60p Recording", "693 AF Points"],
+    "rating": 4.8,
+    "availability": "In Stock",
+    "warranty": "2 Year International Warranty",
+    "description": "Versatile full-frame mirrorless camera perfect for both photography and videography"
+  },
+  {
+    "id": 15,
+    "name": "iPad Pro 12.9",
+    "category": "tablet",
+    "price": 110000,
+    "brand": "Apple",
+    "specs": "12.9-inch Liquid Retina XDR, Apple M2 Chip, 8GB RAM, 128GB Storage, 12MP Camera System, USB-C",
+    "features": ["M2 Chip Performance", "Liquid Retina XDR", "Apple Pencil Support", "Face ID"],
+    "rating": 4.7,
+    "availability": "In Stock",
+    "warranty": "1 Year Limited Warranty",
+    "description": "Professional tablet with desktop-class performance for creative professionals and students"
+  }
+]

requirements.txt

@@ -1,3 +1,12 @@
-altair
-pandas
-streamlit
+langchain
+langchain-google-genai
+google-generativeai
+chromadb
+faiss-cpu
+tiktoken
+pydantic
+fastapi
+uvicorn
+streamlit
+pandas
+python-dotenv