Update app.py

app.py

@@ -1,49 +1,111 @@
 import streamlit as st
 from google import genai
 from io import StringIO
-from prompts import SYSTEM_INSTRUCTION, USER_PROMPT_TEMPLATE
+import prompts # Assuming prompts.py is in the same directory
 
 st.set_page_config(page_title="SQL AI Assistant", layout="wide")
 
-# 1. Setup Sidebar for Context
+# --- 1. Sidebar: Configuration & Context ---
 st.sidebar.title("🛠️ Database Context")
+
+# Dialect and DB Name
 dialect = st.sidebar.selectbox("SQL Dialect", ["PostgreSQL", "MySQL", "SQLite", "BigQuery", "Snowflake"])
 db_name = st.sidebar.text_input("Database Name", placeholder="e.g. production_db")
-schema = st.sidebar.text_area("Table Schemas (DDL)", placeholder="CREATE TABLE users (id INT, name TEXT...)", height=300)
 
-st.title("🤖 Gemini SQL Generator")
-st.caption(f"Powered by Gemini 2.5 Flash")
+# File Uploader for Schema
+st.sidebar.subheader("📄 Upload Schema")
+uploaded_file = st.sidebar.file_uploader("Upload .sql or .txt file", type=["sql", "txt"])
+
+# Logic to handle schema input (Manual or Uploaded)
+initial_schema = ""
+if uploaded_file is not None:
+    initial_schema = uploaded_file.getvalue().decode("utf-8")
+
+schema = st.sidebar.text_area(
+    "Table Schemas (DDL)", 
+    value=initial_schema, 
+    placeholder="CREATE TABLE users (id INT, name TEXT...)", 
+    height=300
+)
+
+# Option to toggle explanations
+show_explanation = st.sidebar.checkbox("Show Logic Explanation", value=False)
 
-# 2. Initialize Gemini Client
-# In HF Spaces, go to Settings -> Secrets and add 'GEMINI_API_KEY'
-api_key = st.secrets["GEMINI_API_KEY"]
-client = genai.Client(api_key=api_key)
+if st.sidebar.button("🗑️ Clear Chat History"):
+    st.session_state.messages = []
+    st.rerun()
+
+# --- 2. Initialize Gemini Client ---
+# Correcting the secret key name based on your error report
+try:
+    api_key = st.secrets["GOOGLE_API_KEY"]
+    client = genai.Client(api_key=api_key)
+except Exception as e:
+    st.error("API Key not found. Please ensure GOOGLE_API_KEY is set in Hugging Face Secrets.")
+    st.stop()
 
-# 3. Chat Interface
+# --- 3. Main UI ---
+st.title("🤖 Gemini SQL Generator")
+st.caption("Generate, inspect, and download optimized SQL queries.")
+
+# Initialize session state for messages and the last generated query
 if "messages" not in st.session_state:
     st.session_state.messages = []
+if "last_query" not in st.session_state:
+    st.session_state.last_query = ""
 
+# Display chat history
 for msg in st.session_state.messages:
-    st.chat_message(msg["role"]).write(msg["content"])
+    with st.chat_message(msg["role"]):
+        if msg["role"] == "assistant":
+            st.code(msg["content"], language="sql")
+        else:
+            st.write(msg["content"])
 
-if prompt := st.chat_input("Show me the top 10 users by signup date..."):
+# --- 4. Chat Input & Generation ---
+if prompt := st.chat_input("Show me all orders from the last 30 days..."):
+    # Add user message to state
     st.session_state.messages.append({"role": "user", "content": prompt})
-    st.chat_message("user").write(prompt)
+    with st.chat_message("user"):
+        st.write(prompt)
 
-    # Build the full system instructions with current sidebar context
-    full_system_msg = SYSTEM_INSTRUCTION.format(
+    # Format instructions from prompts.py
+    # Note: Ensure your SYSTEM_INSTRUCTION in prompts.py has {dialect}, {db_name}, {schema}, and {explain}
+    explain_text = "Provide a brief explanation after the code." if show_explanation else "Provide ONLY the code."
+    
+    full_system_msg = prompts.SYSTEM_INSTRUCTION.format(
         dialect=dialect, 
-        db_name=db_name, 
-        schema=schema if schema else "No specific schema provided."
+        db_name=db_name if db_name else "unspecified", 
+        schema=schema if schema else "No specific schema provided.",
+        explain=explain_text
     )
 
     with st.spinner("Generating SQL..."):
-        response = client.models.generate_content(
-            model="gemini-2.5-flash",
-            config={'system_instruction': full_system_msg},
-            contents=USER_PROMPT_TEMPLATE.format(user_input=prompt)
-        )
+        try:
+            response = client.models.generate_content(
+                model="gemini-2.0-flash", # Using the latest flash model
+                config={'system_instruction': full_system_msg},
+                contents=prompts.USER_PROMPT_TEMPLATE.format(user_input=prompt)
+            )
+            
+            sql_output = response.text
+            st.session_state.last_query = sql_output
+            
+            # Add assistant response to state
+            st.session_state.messages.append({"role": "assistant", "content": sql_output})
+            with st.chat_message("assistant"):
+                st.code(sql_output, language="sql")
         
-        sql_output = response.text
-        st.session_state.messages.append({"role": "assistant", "content": sql_output})
-        st.chat_message("assistant").code(sql_output, language="sql")
+        except Exception as e:
+            st.error(f"Generation failed: {e}")
+
+# --- 5. Download Action ---
+if st.session_state.last_query:
+    st.divider()
+    st.download_button(
+        label="💾 Download Latest Query",
+        data=st.session_state.last_query,
+        file_name="generated_query.sql",
+        mime="text/x-sql",
+        use_container_width=True
+    )