Update app.py

app.py

@@ -2,7 +2,6 @@ import os
 import time
 import streamlit as st
 from twilio.rest import Client
-from twilio.base.exceptions import TwilioRestException
 from pdfminer.high_level import extract_text
 from sentence_transformers import SentenceTransformer
 from transformers import AutoTokenizer
@@ -100,22 +99,47 @@ def send_twilio_message(account_sid, auth_token, conversation_sid, body):
 
 # --- Streamlit UI ---
 st.set_page_config(page_title="Quasa – A Smart WhatsApp Chatbot", layout="wide")
-st.title("📱 Quasa – A Smart WhatsApp Chatbot")
 
-# Load from Hugging Face secrets
+# Styling
+st.markdown("""
+    <style>
+        .big-font {
+            font-size: 28px !important;
+            font-weight: bold;
+        }
+        .small-font {
+            font-size: 16px !important;
+            color: #555;
+        }
+        .stButton > button {
+            background-color: #0066CC;
+            color: white;
+            padding: 0.5em 1em;
+            border-radius: 8px;
+            font-size: 18px;
+        }
+        .stTextInput > div > input {
+            font-size: 16px;
+        }
+    </style>
+""", unsafe_allow_html=True)
+
+st.markdown('<div class="big-font">📱 Quasa – A Smart WhatsApp Chatbot</div>', unsafe_allow_html=True)
+st.markdown('<div class="small-font">Talk to your documents using WhatsApp. Powered by Groq, Twilio, and RAG.</div>', unsafe_allow_html=True)
+
+# Load secrets
 account_sid = st.secrets.get("TWILIO_SID")
 auth_token = st.secrets.get("TWILIO_TOKEN")
 GROQ_API_KEY = st.secrets.get("GROQ_API_KEY")
 
-# Fallback for testing
+# Allow user input fallback
 if not all([account_sid, auth_token, GROQ_API_KEY]):
-    st.warning("⚠️ Some secrets not found. Please enter missing credentials below:")
+    st.warning("⚠️ Some secrets are missing. Please provide them manually:")
     account_sid = st.text_input("Twilio SID", value=account_sid or "")
     auth_token = st.text_input("Twilio Auth Token", type="password", value=auth_token or "")
     GROQ_API_KEY = st.text_input("GROQ API Key", type="password", value=GROQ_API_KEY or "")
 
-# Always show conversation SID input
-conversation_sid = st.text_input("Enter Conversation SID", value="")
+conversation_sid = st.text_input("Enter Twilio Conversation SID", value="")
 
 if all([account_sid, auth_token, GROQ_API_KEY, conversation_sid]):
     os.environ["GROQ_API_KEY"] = GROQ_API_KEY
@@ -140,20 +164,26 @@ if all([account_sid, auth_token, GROQ_API_KEY, conversation_sid]):
 
     index, embedding_model, text_chunks = setup_knowledge_base()
 
-    st.success("✅ Knowledge base ready. Monitoring WhatsApp...")
+    st.success("✅ Knowledge base ready. Monitoring WhatsApp messages...")
+
+    # Message index tracking
+    if "last_processed_index" not in st.session_state:
+        st.session_state.last_processed_index = -1
 
     if st.button("🔁 Check for New WhatsApp Query"):
-        with st.spinner("Checking messages..."):
+        with st.spinner("Checking for new WhatsApp messages..."):
             question, sender, msg_index = fetch_latest_incoming_message(account_sid, auth_token, conversation_sid)
-            if question:
-                st.info(f"📥 New Question from {sender}:\n\n> {question}")
+
+            if question and msg_index != st.session_state.last_processed_index:
+                st.session_state.last_processed_index = msg_index
+                st.info(f"📥 New question from **{sender}**:\n\n> {question}")
                 relevant_chunks = retrieve_chunks(question, index, embedding_model, text_chunks)
                 context = "\n\n".join(relevant_chunks)
                 answer = generate_answer_with_groq(question, context)
                 send_twilio_message(account_sid, auth_token, conversation_sid, answer)
-                st.success("📤 Answer sent via WhatsApp!")
+                st.success("📤 Answer sent back to user on WhatsApp!")
                 st.markdown(f"### ✨ Answer:\n\n{answer}")
             else:
-                st.warning("No new messages from users found.")
+                st.warning("No new messages found.")
 else:
     st.warning("❗ Please provide all required credentials and conversation SID.")