LibraryMainFrame.java

package ui;

import dao.BookDAO;
import dao.IssuedBookDAO;
import models.Book;

import javax.swing.*;
import java.awt.*;
import java.util.List;
import java.util.logging.Logger;

/**
 * LibraryMainFrame.java - Main application window
 * 
 * MVC Pattern: This is the main View component
 * Uses JTabbedPane to organize different operations:
 * 1. Add Book
 * 2. Search Book
 * 3. Issue/Return Book
 * 4. View All Books
 * 
 * Best Practices:
 * - Modular design (each operation in separate panel)
 * - Consistent look and feel
 * - Clear navigation
 */
public class LibraryMainFrame extends JFrame {
    
    private static final Logger logger = Logger.getLogger(LibraryMainFrame.class.getName());
    private static final long serialVersionUID = 1L;
    
    // UI Components
    private JTabbedPane tabbedPane;
    private AddBookPanel addBookPanel;
    private SearchBookPanel searchBookPanel;
    private IssueReturnPanel issueReturnPanel;
    private ViewBooksPanel viewBooksPanel;
    
    // Data Access Objects
    private BookDAO bookDAO;
    private IssuedBookDAO issuedBookDAO;
    
    /**
     * Constructor - Initializes the main frame
     */
    public LibraryMainFrame() {
        // Initialize DAOs
        this.bookDAO = new BookDAO();
        this.issuedBookDAO = new IssuedBookDAO();
        
        // Frame settings
        setTitle("📚 Library Management System");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(1000, 700);
        setLocationRelativeTo(null);
        setResizable(true);
        setIconImage(createIconImage());
        
        // Initialize UI
        initializeUI();
        
        // Display statistics
        displayStatistics();
        
        logger.info("✓ Application started successfully");
    }
    
    /**
     * Initializes all UI components
     */
    private void initializeUI() {
        // Create tabbed pane
        tabbedPane = new JTabbedPane();
        tabbedPane.setTabPlacement(JTabbedPane.TOP);
        tabbedPane.setFont(new Font("Arial", Font.BOLD, 12));
        
        // Create panels for each operation
        addBookPanel = new AddBookPanel(bookDAO);
        searchBookPanel = new SearchBookPanel(bookDAO);
        issueReturnPanel = new IssueReturnPanel(bookDAO, issuedBookDAO);
        viewBooksPanel = new ViewBooksPanel(bookDAO);
        
        // Add tabs to tabbed pane
        tabbedPane.addTab("➕ Add Book", addBookPanel);
        tabbedPane.addTab("🔍 Search Book", searchBookPanel);
        tabbedPane.addTab("📤 Issue/Return", issueReturnPanel);
        tabbedPane.addTab("📋 View All Books", viewBooksPanel);
        
        // Create menu bar
        createMenuBar();
        
        // Create status bar
        JPanel statusBar = createStatusBar();
        
        // Add components to frame
        add(tabbedPane, BorderLayout.CENTER);
        add(statusBar, BorderLayout.SOUTH);
    }
    
    /**
     * Creates the menu bar
     */
    private void createMenuBar() {
        JMenuBar menuBar = new JMenuBar();
        
        // File Menu
        JMenu fileMenu = new JMenu("File");
        fileMenu.setMnemonic('F');
        
        JMenuItem refreshItem = new JMenuItem("Refresh");
        refreshItem.addActionListener(e -> refreshAllTabs());
        
        JMenuItem exitItem = new JMenuItem("Exit");
        exitItem.addActionListener(e -> System.exit(0));
        
        fileMenu.add(refreshItem);
        fileMenu.addSeparator();
        fileMenu.add(exitItem);
        
        // Help Menu
        JMenu helpMenu = new JMenu("Help");
        helpMenu.setMnemonic('H');
        
        JMenuItem aboutItem = new JMenuItem("About");
        aboutItem.addActionListener(e -> showAboutDialog());
        
        helpMenu.add(aboutItem);
        
        menuBar.add(fileMenu);
        menuBar.add(helpMenu);
        
        setJMenuBar(menuBar);
    }
    
    /**
     * Creates status bar with statistics
     */
    private JPanel createStatusBar() {
        JPanel statusPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
        statusPanel.setBorder(BorderFactory.createLoweredBevelBorder());
        
        JLabel statusLabel = new JLabel("Ready");
        statusPanel.add(statusLabel);
        
        return statusPanel;
    }
    
    /**
     * Displays statistics on startup
     */
    private void displayStatistics() {
        try {
            int totalBooks = bookDAO.getAllBooks().size();
            int availableBooks = bookDAO.getAvailableBooksCount();
            int issuedBooks = issuedBookDAO.getTotalIssuedCount();
            int overdueBooks = issuedBookDAO.getOverdueBooksCount();
            
            String stats = String.format(
                "Total Books: %d | Available: %d | Issued: %d | Overdue: %d",
                totalBooks, availableBooks, issuedBooks, overdueBooks
            );
            
            logger.info("📊 " + stats);
        } catch (Exception e) {
            logger.warning("Could not fetch statistics: " + e.getMessage());
        }
    }
    
    /**
     * Refreshes all tabs with latest data
     */
    private void refreshAllTabs() {
        addBookPanel.refresh();
        searchBookPanel.refresh();
        issueReturnPanel.refresh();
        viewBooksPanel.refresh();
        displayStatistics();
        JOptionPane.showMessageDialog(this, "✓ All data refreshed", 
                                     "Success", JOptionPane.INFORMATION_MESSAGE);
    }
    
    /**
     * Shows about dialog
     */
    private void showAboutDialog() {
        String aboutText = "Library Management System v1.0\n\n" +
                          "A Java Swing application for managing library books\n\n" +
                          "Features:\n" +
                          "✓ Add and manage books\n" +
                          "✓ Search books by ID or title\n" +
                          "✓ Issue and return books\n" +
                          "✓ Track overdue books\n" +
                          "✓ View comprehensive statistics\n\n" +
                          "Database: MySQL with JDBC\n" +
                          "UI Framework: Java Swing";
        
        JOptionPane.showMessageDialog(this, aboutText, "About", 
                                     JOptionPane.INFORMATION_MESSAGE);
    }
    
    /**
     * Creates a simple icon image
     */
    private Image createIconImage() {
        // Create a simple 16x16 image
        java.awt.image.BufferedImage image = 
            new java.awt.image.BufferedImage(16, 16, java.awt.image.BufferedImage.TYPE_INT_RGB);
        Graphics2D g2d = image.createGraphics();
        g2d.setColor(Color.BLUE);
        g2d.fillRect(0, 0, 16, 16);
        g2d.setColor(Color.WHITE);
        g2d.drawString("📚", 2, 14);
        g2d.dispose();
        return image;
    }
    
    /**
     * Main entry point
     */
    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            try {
                UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
            } catch (Exception e) {
                logger.warning("Could not set system look and feel");
            }
            
            LibraryMainFrame frame = new LibraryMainFrame();
            frame.setVisible(true);
        });
    }
}