Update app.py

app.py

@@ -1,26 +1,34 @@
 import streamlit as st
+from streamlit_chat import message
 from openai import OpenAI
 import time
 import datetime
 import os
 
-# Securely get credentials
 generated_user = os.getenv("User")
 generated_password = os.getenv("Password")
 openai_key = os.getenv("openai_key")
+assistant_id = os.getenv("ASSISTANT_ID")
 
-# Streamlit app configuration
 st.set_page_config(page_title="Carfind.co.za AI Assistant", layout="wide")
-st.title("🚗 Carfind.co.za AI Assistant")
+st.markdown("<h1 style='text-align: center;'>Carfind.co.za AI Assistant</h1>", unsafe_allow_html=True)
 st.caption("Chat with Carfind.co.za and find your next car fast")
 
-# Initialize authentication state
+dark_mode = st.toggle("🌙 Switch to Light Mode", value=True)
+
+st.markdown("""
+    <style>
+    .stChatMessage { max-width: 85%; border-radius: 12px; padding: 8px; }
+    .stChatMessage[data-testid="stChatMessage-user"] { background: #333; color: white; }
+    .stChatMessage[data-testid="stChatMessage-assistant"] { background: #00529B; color: white; }
+    </style>
+""", unsafe_allow_html=True)
+
 if "authenticated" not in st.session_state:
     st.session_state.authenticated = False
 
-# Login screen
 if not st.session_state.authenticated:
-    st.subheader("🔐 Login")
+    st.subheader("🔑 Login")
     username = st.text_input("Username")
     password = st.text_input("Password", type="password")
 
@@ -33,82 +41,65 @@ if not st.session_state.authenticated:
         else:
             st.error("Incorrect username or password. Please try again.")
 
-# Main chat interface
 else:
     st.divider()
 
-    if "messages" not in st.session_state:
-        st.session_state["messages"] = []
-
-    # Display chat history
-    for message in st.session_state.messages:
-        role = message["role"]
-        content = message["content"]
-        if role == "assistant":
-            st.markdown(f'<img src="https://www.carfind.co.za/images/Carfind-Icon.svg" width="30" style="vertical-align: middle;"> <strong>Carfind Assistant:</strong> {content}', unsafe_allow_html=True)
-        else:
-            st.chat_message(role).write(content)
-
-    # Input with clear chat button
-    col_clear, col_input = st.columns([1, 8])
+    if "thread_id" not in st.session_state:
+        st.session_state["thread_id"] = None
 
-    with col_clear:
-        if st.button("🧹 Clear Chat"):
-            st.session_state.messages = []
-            st.success("Chat history cleared.")
+    input_col, clear_col = st.columns([8, 1])
+    with input_col:
+        user_input = st.text_input("Type your message here...", key="chat_input")
 
-    with col_input:
-        user_input = st.chat_input("Type your message here...")
+    with clear_col:
+        if st.button("🗑️", help="Clear Chat"):
+            st.session_state["thread_id"] = None
+            st.success("Chat cleared.")
+            st.rerun()
 
-    if openai_key:
+    if openai_key and assistant_id:
         client = OpenAI(api_key=openai_key)
-        ASSISTANT_ID = "asst_5gQR21fOsmHil11FGBzEArA7"
-
-        def save_transcript(messages):
-            with open("chat_logs.txt", "a") as log:
-                log.write(f"\n--- New Chat ({datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')}) ---\n")
-                for msg in messages:
-                    log.write(f"{msg['role'].capitalize()}: {msg['content']}\n")
-                log.write("--- End Chat ---\n")
 
         if user_input:
-            if len(st.session_state.messages) == 0 or user_input != st.session_state.messages[-1]["content"]:
-                st.session_state.messages.append({"role": "user", "content": user_input})
-                st.chat_message("user").write(user_input)
-
-                try:
-                    thread = client.beta.threads.create()
-                    thread_id = thread.id
-
-                    client.beta.threads.messages.create(
-                        thread_id=thread_id,
-                        role="user",
-                        content=user_input
-                    )
-
+            # Create thread once and reuse it
+            if not st.session_state["thread_id"]:
+                thread = client.beta.threads.create()
+                st.session_state["thread_id"] = thread.id
+
+            # Add user message to thread
+            client.beta.threads.messages.create(
+                thread_id=st.session_state["thread_id"], role="user", content=user_input
+            )
+
+            try:
+                with st.spinner("Thinking and typing... 💭"):
+                    # Run assistant
                     run = client.beta.threads.runs.create(
-                        thread_id=thread_id,
-                        assistant_id=ASSISTANT_ID
+                        thread_id=st.session_state["thread_id"], assistant_id=assistant_id
                     )
 
                     while True:
                         run_status = client.beta.threads.runs.retrieve(
-                            thread_id=thread_id,
-                            run_id=run.id
+                            thread_id=st.session_state["thread_id"], run_id=run.id
                         )
                         if run_status.status == "completed":
                             break
                         time.sleep(1)
 
-                    messages = client.beta.threads.messages.list(thread_id=thread_id)
-                    assistant_message = messages.data[0].content[0].text.value.strip()
+                # ✅ Fetch the entire conversation history:
+                messages_response = client.beta.threads.messages.list(
+                    thread_id=st.session_state["thread_id"]
+                )
+
+                # Display the entire conversation (in chronological order)
+                for msg in reversed(messages_response.data):
+                    if msg.role == "user":
+                        message(msg.content[0].text.value, is_user=True, avatar_style="adventurer")
+                    else:
+                        message(f"**Carfind Assistant:** {msg.content[0].text.value}", is_user=False, avatar_style="bottts")
 
-                    if assistant_message.lower() != user_input.lower():
-                        st.markdown(f'<img src="https://www.carfind.co.za/images/Carfind-Icon.svg" width="30" style="vertical-align: middle;"> <strong>Carfind Assistant:</strong> {assistant_message}', unsafe_allow_html=True)
-                        st.session_state.messages.append({"role": "assistant", "content": assistant_message})
-                        save_transcript(st.session_state.messages)
+            except Exception as e:
+                st.error(f"An error occurred: {str(e)}")
 
-                except Exception as e:
-                    st.error(f"An error occurred: {str(e)}")
     else:
-        st.error("OpenAI key not found. Please ensure it is set as a Hugging Face secret.")
+        st.error("⚠️ OpenAI key or Assistant ID not found. Please ensure both are set as Hugging Face secrets.")