Update main.py

main.py

@@ -1,68 +1,79 @@
-import streamlit as st
-import google.generativeai as genai
-
-st.title("AI Code Reviewer ")
-
-try:
-    with open("API_key.txt", "r") as f:
-        api_key = f.read().strip()
-    genai.configure(api_key=api_key)
-    model = genai.GenerativeModel(model_name="gemini-2.0-flash-001")
-
-except Exception as e:
-    st.error("API Key Error! Please check your API key file.")
-    st.stop()
-
-# system prompt
-sys_prompt ='''
-You are an AI Code Reviewer. Your task is to analyze submitted code in any programming language and provide a structured review.
-
-If the code contains errors (syntax, logical, or runtime): 
-1. Identify and explain the errors concisely.  
-2. Provide a corrected version in a copyable format.  
-3. Ensure the logic is correct; if flawed, correct it with an explanation.  
-
-If the code is correct but inefficient:
-- Suggest performance optimizations (e.g., time and space complexity improvements).  
-
-If the code is correct and efficient:
-- Briefly explain what the code does in simple terms.  
-
-Additional Considerations:
-- Ensure readability and best coding practices (e.g., meaningful variable names, comments, modularity).  
-- If the user submits a non-programming question, respond humorously as a dedicated code reviewer.  
-
-Keep responses concise, structured, and helpful.
-
-'''
-
-if "history" not in st.session_state:
-    st.session_state.history = []
-
-user_query = st.text_area("Submit your code for review:", height=150, key="user_input",placeholder= 'code here')
-
-if st.button("Review"):
-    with st.spinner("Reviewing your code... "):
-        try:
-            response = model.generate_content(f"{sys_prompt}\n\nUser: {user_query}")
-            ai_response = response.text.strip() if response.text else " Error: No response received."
-
-            st.session_state.history.append({"query": user_query, "response": ai_response})
-
-            st.subheader("Review Result:")
-            st.write(ai_response)
-
-        except Exception as e:
-            st.error(f"An error occurred: {e}")
-
-st.sidebar.title("Review History")
-if st.session_state.history:
-    queries = [f"Query {i+1}" for i in range(len(st.session_state.history))]
-    selected_query = st.sidebar.selectbox("Select a past query:", queries, index=len(queries)-1)
-
-    if selected_query:
-        idx = queries.index(selected_query)
-        st.sidebar.subheader("Selected Review Result:")
-        st.sidebar.write(st.session_state.history[idx]["response"])
-else:
-    st.sidebar.write("No queries yet. Submit your code above!")
+import streamlit as st
+import google.generativeai as genai
+
+st.title("🧠 AI Code Reviewer")
+
+# Prompt user for API key (stored in session)
+if "api_key" not in st.session_state:
+    st.session_state.api_key = ""
+
+# Show input field if API key is not already entered
+if not st.session_state.api_key:
+    st.session_state.api_key = st.text_input("Enter your Google Generative AI API Key", type="password")
+    if not st.session_state.api_key:
+        st.warning("Please enter your API key to continue.")
+        st.stop()
+
+# Configure generative model
+try:
+    genai.configure(api_key=st.session_state.api_key)
+    model = genai.GenerativeModel(model_name="gemini-1.5-flash")
+except Exception as e:
+    st.error("Invalid API key or configuration error.")
+    st.stop()
+
+# System prompt for AI behavior
+sys_prompt = '''
+You are an AI Code Reviewer. Your task is to analyze submitted code in any programming language and provide a structured review.
+
+If the code contains errors (syntax, logical, or runtime): 
+1. Identify and explain the errors concisely.  
+2. Provide a corrected version in a copyable format.  
+3. Ensure the logic is correct; if flawed, correct it with an explanation.  
+
+If the code is correct but inefficient:
+- Suggest performance optimizations (e.g., time and space complexity improvements).  
+
+If the code is correct and efficient:
+- Briefly explain what the code does in simple terms.  
+
+Additional Considerations:
+- Ensure readability and best coding practices (e.g., meaningful variable names, comments, modularity).  
+- If the user submits a non-programming question, respond humorously as a dedicated code reviewer.  
+
+Keep responses concise, structured, and helpful.
+'''
+
+# Review history storage
+if "history" not in st.session_state:
+    st.session_state.history = []
+
+# Code input
+user_query = st.text_area("Submit your code for review:", height=150, key="user_input", placeholder="Paste your code here...")
+
+if st.button("Review"):
+    with st.spinner("Reviewing your code..."):
+        try:
+            response = model.generate_content(f"{sys_prompt}\n\nUser: {user_query}")
+            ai_response = response.text.strip() if response.text else "Error: No response received."
+
+            st.session_state.history.append({"query": user_query, "response": ai_response})
+
+            st.subheader("Review Result:")
+            st.write(ai_response)
+
+        except Exception as e:
+            st.error(f"An error occurred: {e}")
+
+# Sidebar - Review History
+st.sidebar.title("Review History")
+if st.session_state.history:
+    queries = [f"Query {i+1}" for i in range(len(st.session_state.history))]
+    selected_query = st.sidebar.selectbox("Select a past query:", queries, index=len(queries)-1)
+
+    if selected_query:
+        idx = queries.index(selected_query)
+        st.sidebar.subheader("Selected Review Result:")
+        st.sidebar.write(st.session_state.history[idx]["response"])
+else:
+    st.sidebar.write("No queries yet. Submit your code above!")