Update app.py

app.py

@@ -1,68 +1,182 @@
+"""
+Main Streamlit Application
+"""
 import streamlit as st
 import sys
 import os
-from pathlib import Path
+from datetime import datetime
+import logging
 
-# Add the app directory to Python path
-app_dir = Path(__file__).parent
-sys.path.insert(0, str(app_dir))
+# Add the current directory to Python path
+current_dir = os.path.dirname(os.path.abspath(__file__))
+sys.path.insert(0, current_dir)
 
-from pages.dashboard import create_dashboard_page
-from pages.settings import create_settings_page
-from utils.config import load_config
-from utils.logging import setup_logging, get_logger
+print(f"===== Application Startup at {datetime.now().strftime('%Y-%m-%d %H:%M:%S')} =====")
+
+try:
+    from pages.dashboard import create_dashboard_page
+    from utils.error_handling import handle_data_exceptions, log_error, display_error
+    from utils.storage import init_session_state, get_session_state, set_session_state
+except ImportError as e:
+    st.error(f"Import Error: {e}")
+    st.stop()
+
+
+# Configure Streamlit page
+st.set_page_config(
+    page_title="Dashboard App",
+    page_icon="📊",
+    layout="wide",
+    initial_sidebar_state="expanded",
+    menu_items={
+        'Get Help': 'https://www.streamlit.io/community',
+        'Report a bug': None,
+        'About': "# Dashboard App\nBuilt with Streamlit"
+    }
+)
 
-# Initialize logging
-setup_logging()
-logger = get_logger(__name__)
 
 def main():
-    """Main application entry point"""
-    try:
-        # Configure Streamlit page
-        st.set_page_config(
-            page_title="MONA - Monitoring & Analytics",
-            page_icon="📊",
-            layout="wide",
-            initial_sidebar_state="expanded"
-        )
+    """
+    Main application function
+    """
+    # Initialize session state
+    init_session_state('current_page', 'dashboard')
+    init_session_state('user_settings', {})
+    init_session_state('app_initialized', False)
+    
+    # App initialization
+    if not get_session_state('app_initialized'):
+        initialize_app()
+        set_session_state('app_initialized', True)
+    
+    # Create sidebar navigation
+    create_sidebar()
+    
+    # Main content area
+    current_page = get_session_state('current_page', 'dashboard')
+    
+    if current_page == 'dashboard':
+        create_dashboard_page()
+    else:
+        st.error("Page not found!")
+
+
+def initialize_app():
+    """
+    Initialize the application
+    """
+    # Create necessary directories
+    os.makedirs('data', exist_ok=True)
+    os.makedirs('cache', exist_ok=True)
+    os.makedirs('logs', exist_ok=True)
+    
+    # Configure logging
+    logging.basicConfig(
+        level=logging.INFO,
+        format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
+        handlers=[
+            logging.FileHandler('logs/app.log'),
+            logging.StreamHandler()
+        ]
+    )
+    
+    logging.info("Application initialized successfully")
+
+
+def create_sidebar():
+    """
+    Create sidebar navigation
+    """
+    with st.sidebar:
+        st.title("🏠 Navigation")
         
-        # Load configuration
-        config = load_config()
-        logger.info("Application started successfully")
+        # Page navigation
+        page_options = {
+            'dashboard': '📊 Dashboard',
+            # Add more pages here as needed
+        }
         
-        # Create sidebar navigation
-        st.sidebar.title("MONA Dashboard")
-        page = st.sidebar.selectbox(
-            "Navigate to:",
-            ["Dashboard", "Settings", "About"]
+        current_page = st.radio(
+            "Select Page",
+            options=list(page_options.keys()),
+            format_func=lambda x: page_options[x],
+            index=0
         )
         
-        # Route to appropriate page
-        if page == "Dashboard":
-            create_dashboard_page()
-        elif page == "Settings":
-            create_settings_page()
-        elif page == "About":
-            create_about_page()
-            
+        set_session_state('current_page', current_page)
+        
+        st.markdown("---")
+        
+        # App info
+        st.subheader("ℹ️ App Info")
+        st.info(f"**Version:** 1.0.0\n**Last Updated:** {datetime.now().strftime('%Y-%m-%d')}")
+        
+        # Settings
+        st.subheader("⚙️ Settings")
+        
+        # Theme toggle (placeholder)
+        theme = st.selectbox("Theme", ["Light", "Dark"], index=0)
+        
+        # Auto-refresh toggle
+        auto_refresh = st.checkbox("Auto Refresh", value=False)
+        if auto_refresh:
+            refresh_interval = st.slider("Refresh Interval (seconds)", 30, 300, 60)
+            st.session_state.refresh_interval = refresh_interval
+        
+        # Save settings
+        user_settings = {
+            'theme': theme,
+            'auto_refresh': auto_refresh,
+            'refresh_interval': st.session_state.get('refresh_interval', 60)
+        }
+        set_session_state('user_settings', user_settings)
+        
+        st.markdown("---")
+        
+        # Debug info (only show in development)
+        if st.checkbox("Show Debug Info"):
+            st.subheader("🐛 Debug Info")
+            st.json({
+                'Current Page': current_page,
+                'Session State Keys': list(st.session_state.keys()),
+                'User Settings': get_session_state('user_settings', {}),
+                'App Initialized': get_session_state('app_initialized', False)
+            })
+
+
+@handle_data_exceptions
+def handle_error_boundary():
+    """
+    Global error handler for the application
+    """
+    try:
+        main()
     except Exception as e:
-        logger.error(f"Application error: {str(e)}")
-        st.error(f"An error occurred: {str(e)}")
-
-def create_about_page():
-    """Create the about page"""
-    st.title("About MONA")
-    st.write("""
-    MONA (Monitoring & Analytics) is a comprehensive dashboard application 
-    for data visualization and monitoring.
-    
-    **Features:**
-    - Real-time data monitoring
-    - Interactive dashboards
-    - Data analytics and reporting
-    - Customizable settings
-    """)
+        log_error("Critical application error", e)
+        st.error("A critical error occurred. Please refresh the page.")
+        
+        # Show error details in expander
+        with st.expander("Error Details"):
+            st.exception(e)
+
+
+# Health check endpoint
+def health_check():
+    """
+    Simple health check for the application
+    """
+    return {
+        'status': 'healthy',
+        'timestamp': datetime.now().isoformat(),
+        'version': '1.0.0'
+    }
+
 
 if __name__ == "__main__":
-    main()
+    try:
+        handle_error_boundary()
+    except Exception as e:
+        print(f"Fatal error: {e}")
+        import traceback
+        traceback.print_exc()