Update app.py

app.py

@@ -3,8 +3,8 @@
 # =========================
 import os
 import tempfile
-
 import gradio as gr
+
 from groq import Groq
 from duckduckgo_search import DDGS
 
@@ -17,7 +17,7 @@ from langchain_community.vectorstores import Chroma
 # =========================
 # CONFIG
 # =========================
-GROQ_API_KEY = os.getenv("GROQ_API_KEY")  # ✅ Hugging Face Secret
+GROQ_API_KEY = os.getenv("GROQ_API_KEY")  # HF SECRET KEY
 
 client = Groq(api_key=GROQ_API_KEY)
 
@@ -57,18 +57,16 @@ def web_search(query):
 
 
 # =========================
-# PROCESS PDF (FIXED FOR HF)
+# PROCESS PDF (HF SAFE)
 # =========================
 def process_pdf(file):
 
     global vectorstore, retriever
 
-    # ✅ SAFE HF FILE HANDLING
-    with tempfile.NamedTemporaryFile(delete=False, suffix=".pdf") as tmp:
-        tmp.write(file.read())
-        tmp_path = tmp.name
+    # safe file handling
+    file_path = file.name
 
-    loader = PyPDFLoader(tmp_path)
+    loader = PyPDFLoader(file_path)
     documents = loader.load()
 
     splitter = RecursiveCharacterTextSplitter(
@@ -89,11 +87,11 @@ def process_pdf(file):
 
     retriever = vectorstore.as_retriever(search_kwargs={"k": 4})
 
-    return "✅ PDF processed successfully. You can now ask questions."
+    return "✅ PDF successfully processed"
 
 
 # =========================
-# HYBRID RAG FUNCTION
+# RAG ENGINE (HYBRID)
 # =========================
 def ask_rag(query):
 
@@ -105,10 +103,10 @@ def ask_rag(query):
     docs = retriever.invoke(query)
     pdf_context = "\n\n".join([d.page_content for d in docs])
 
-    # fallback if weak retrieval
+    # hybrid fallback
     if len(pdf_context.strip()) < 50:
         web_context = web_search(query)
-        context = pdf_context + "\n\nWEB CONTEXT:\n" + web_context
+        context = pdf_context + "\n\nWEB:\n" + web_context
     else:
         context = pdf_context
 
@@ -123,7 +121,7 @@ def ask_rag(query):
 
 
 # =========================
-# CHAT FUNCTION (SAFE)
+# CHAT FUNCTION (FIXED FORMAT)
 # =========================
 def chat(user_message, history):
 
@@ -132,22 +130,23 @@ def chat(user_message, history):
     if history is None:
         history = []
 
-    history.append((user_message, response))
+    history.append({"role": "user", "content": user_message})
+    history.append({"role": "assistant", "content": response})
 
     return history, history
 
 
 # =========================
-# GRADIO UI (HF SAFE)
+# UI (HUGGING FACE SAFE)
 # =========================
 with gr.Blocks() as app:
 
-    gr.Markdown("# 🧠 Hybrid RAG Chatbot (PDF + Web Search)")
+    gr.Markdown("# 🧠 Hybrid RAG Chatbot (PDF + Web)")
 
     file = gr.File(label="Upload PDF")
     status = gr.Textbox(label="Status")
 
-    chatbot = gr.Chatbot()
+    chatbot = gr.Chatbot(type="messages")  # IMPORTANT FIX
     msg = gr.Textbox(placeholder="Ask your question...")
     state = gr.State([])