LibraryUI.java

import javax.swing.*;
import javax.swing.border.EmptyBorder;
import javax.swing.border.LineBorder;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

public class LibraryUI {
    public static final Color BACKGROUND = new Color(244, 247, 251);
    public static final Color CARD = Color.WHITE;
    public static final Color PRIMARY = new Color(33, 99, 235);
    public static final Color PRIMARY_DARK = new Color(24, 74, 178);
    public static final Color ACCENT = new Color(18, 183, 106);
    public static final Color TEXT = new Color(28, 32, 39);
    public static final Color MUTED = new Color(99, 110, 125);
    public static final Color BORDER = new Color(218, 225, 234);
    public static final Color PANEL_TINT = new Color(248, 250, 253);
    public static final Font TITLE_FONT = new Font("Segoe UI", Font.BOLD, 24);
    public static final Font HERO_FONT = new Font("Segoe UI", Font.BOLD, 32);
    public static final Font LABEL_FONT = new Font("Segoe UI", Font.PLAIN, 14);
    public static final Font FIELD_FONT = new Font("Segoe UI", Font.PLAIN, 14);

    private LibraryUI() {
    }

    public static JPanel createContentPanel() {
        JPanel panel = new JPanel();
        panel.setBackground(BACKGROUND);
        panel.setBorder(new EmptyBorder(18, 18, 18, 18));
        return panel;
    }

    public static JPanel createGradientPanel() {
        return new JPanel() {
            @Override
            protected void paintComponent(Graphics g) {
                super.paintComponent(g);
                Graphics2D g2 = (Graphics2D) g.create();
                g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
                GradientPaint gradient = new GradientPaint(
                    0, 0, new Color(13, 71, 161),
                    getWidth(), getHeight(), new Color(39, 110, 241)
                );
                g2.setPaint(gradient);
                g2.fillRoundRect(0, 0, getWidth(), getHeight(), 28, 28);
                g2.setColor(new Color(255, 255, 255, 26));
                g2.fillOval(getWidth() - 150, -30, 170, 170);
                g2.fillOval(getWidth() - 240, 60, 120, 120);
                g2.dispose();
            }
        };
    }

    public static JPanel createCardPanel() {
        JPanel panel = new JPanel();
        panel.setBackground(CARD);
        panel.setBorder(BorderFactory.createCompoundBorder(
            new LineBorder(BORDER, 1, true),
            new EmptyBorder(18, 18, 18, 18)
        ));
        return panel;
    }

    public static JLabel createTitle(String text) {
        JLabel label = new JLabel(text);
        label.setFont(TITLE_FONT);
        label.setForeground(TEXT);
        return label;
    }

    public static JLabel createHeroTitle(String text) {
        JLabel label = new JLabel(text);
        label.setFont(HERO_FONT);
        label.setForeground(Color.WHITE);
        return label;
    }

    public static JLabel createSubtitle(String text) {
        JLabel label = new JLabel(text);
        label.setFont(LABEL_FONT);
        label.setForeground(MUTED);
        return label;
    }

    public static JLabel createHeroSubtitle(String text) {
        JLabel label = new JLabel(text);
        label.setFont(new Font("Segoe UI", Font.PLAIN, 15));
        label.setForeground(new Color(232, 239, 255));
        return label;
    }

    public static JLabel createIconBadge(String iconKey) {
        JLabel label = new JLabel(resolveIcon(iconKey));
        label.setOpaque(true);
        label.setBackground(new Color(255, 255, 255, 34));
        label.setBorder(new EmptyBorder(10, 10, 10, 10));
        return label;
    }

    public static JTextField createTextField(int columns) {
        JTextField field = new JTextField(columns);
        field.setFont(FIELD_FONT);
        field.setBackground(Color.WHITE);
        field.setBorder(BorderFactory.createCompoundBorder(
            new LineBorder(BORDER, 1, true),
            new EmptyBorder(8, 10, 8, 10)
        ));
        return field;
    }

    public static JPasswordField createPasswordField(int columns) {
        JPasswordField field = new JPasswordField(columns);
        field.setFont(FIELD_FONT);
        field.setBackground(Color.WHITE);
        field.setBorder(BorderFactory.createCompoundBorder(
            new LineBorder(BORDER, 1, true),
            new EmptyBorder(8, 10, 8, 10)
        ));
        return field;
    }

    public static JComboBox<BookItem> createBookDropdown() {
        JComboBox<BookItem> comboBox = new JComboBox<>();
        comboBox.setFont(FIELD_FONT);
        comboBox.setBackground(Color.WHITE);
        comboBox.setBorder(BorderFactory.createCompoundBorder(
            new LineBorder(BORDER, 1, true),
            new EmptyBorder(6, 8, 6, 8)
        ));
        return comboBox;
    }

    public static JButton createPrimaryButton(String text) {
        JButton button = new JButton(text);
        button.setFont(new Font("Segoe UI", Font.BOLD, 14));
        button.setBackground(PRIMARY);
        button.setForeground(Color.WHITE);
        button.setFocusPainted(false);
        button.setBorder(new EmptyBorder(10, 18, 10, 18));
        installButtonHover(button, PRIMARY, PRIMARY_DARK);
        return button;
    }

    public static JButton createPrimaryButton(String text, String iconKey) {
        JButton button = createPrimaryButton(text);
        button.setIcon(resolveIcon(iconKey));
        button.setIconTextGap(10);
        return button;
    }

    public static JButton createSecondaryButton(String text) {
        JButton button = new JButton(text);
        button.setFont(new Font("Segoe UI", Font.BOLD, 14));
        button.setBackground(new Color(233, 240, 255));
        button.setForeground(PRIMARY_DARK);
        button.setFocusPainted(false);
        button.setBorder(new EmptyBorder(10, 18, 10, 18));
        installButtonHover(button, new Color(233, 240, 255), new Color(215, 228, 255));
        return button;
    }

    public static JTextArea createInfoArea(int rows, int cols) {
        JTextArea area = new JTextArea(rows, cols);
        area.setFont(FIELD_FONT);
        area.setEditable(false);
        area.setLineWrap(true);
        area.setWrapStyleWord(true);
        area.setBackground(PANEL_TINT);
        area.setForeground(TEXT);
        area.setBorder(BorderFactory.createCompoundBorder(
            new LineBorder(BORDER, 1, true),
            new EmptyBorder(12, 12, 12, 12)
        ));
        return area;
    }

    public static JScrollPane wrap(JComponent component) {
        JScrollPane scrollPane = new JScrollPane(component);
        scrollPane.setBorder(new LineBorder(BORDER, 1, true));
        return scrollPane;
    }

    public static void styleTable(JTable table) {
        table.setFont(FIELD_FONT);
        table.setRowHeight(30);
        table.setShowGrid(false);
        table.setIntercellSpacing(new Dimension(0, 0));
        table.getTableHeader().setFont(new Font("Segoe UI", Font.BOLD, 13));
        table.getTableHeader().setBackground(new Color(238, 243, 252));
        table.getTableHeader().setForeground(TEXT);
        table.setSelectionBackground(new Color(219, 232, 255));
        table.setSelectionForeground(TEXT);
    }

    public static JButton createActionCard(String title, String subtitle, String iconKey) {
        JButton button = new JButton();
        button.setLayout(new BorderLayout(0, 12));
        button.setBackground(Color.WHITE);
        button.setFocusPainted(false);
        button.setBorder(BorderFactory.createCompoundBorder(
            new LineBorder(BORDER, 1, true),
            new EmptyBorder(16, 16, 16, 16)
        ));

        JLabel icon = new JLabel(resolveIcon(iconKey));
        JPanel iconWrap = new JPanel(new FlowLayout(FlowLayout.LEFT, 0, 0));
        iconWrap.setOpaque(false);
        iconWrap.add(icon);
        button.add(iconWrap, BorderLayout.NORTH);

        JPanel textPanel = new JPanel();
        textPanel.setOpaque(false);
        textPanel.setLayout(new BoxLayout(textPanel, BoxLayout.Y_AXIS));

        JLabel titleLabel = new JLabel(title);
        titleLabel.setFont(new Font("Segoe UI", Font.BOLD, 16));
        titleLabel.setForeground(TEXT);
        JLabel subtitleLabel = new JLabel("<html><body style='width:150px'>" + subtitle + "</body></html>");
        subtitleLabel.setFont(new Font("Segoe UI", Font.PLAIN, 12));
        subtitleLabel.setForeground(MUTED);
        textPanel.add(titleLabel);
        textPanel.add(Box.createVerticalStrut(4));
        textPanel.add(subtitleLabel);

        button.add(textPanel, BorderLayout.CENTER);
        installCardHover(button);
        return button;
    }

    public static void revealComponents(Component... components) {
        for (Component component : components) {
            component.setVisible(false);
        }

        Timer timer = new Timer(90, null);
        timer.addActionListener(e -> {
            for (Component component : components) {
                if (!component.isVisible()) {
                    component.setVisible(true);
                    component.revalidate();
                    component.repaint();
                    return;
                }
            }
            timer.stop();
        });
        timer.setInitialDelay(120);
        timer.start();
    }

    private static void installButtonHover(AbstractButton button, Color base, Color hover) {
        button.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseEntered(MouseEvent e) {
                button.setBackground(hover);
            }

            @Override
            public void mouseExited(MouseEvent e) {
                button.setBackground(base);
            }
        });
    }

    private static void installCardHover(JButton button) {
        Color base = Color.WHITE;
        Color hover = new Color(244, 248, 255);
        button.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseEntered(MouseEvent e) {
                button.setBackground(hover);
                button.setBorder(BorderFactory.createCompoundBorder(
                    new LineBorder(PRIMARY, 1, true),
                    new EmptyBorder(16, 16, 16, 16)
                ));
            }

            @Override
            public void mouseExited(MouseEvent e) {
                button.setBackground(base);
                button.setBorder(BorderFactory.createCompoundBorder(
                    new LineBorder(BORDER, 1, true),
                    new EmptyBorder(16, 16, 16, 16)
                ));
            }
        });
    }

    private static Icon resolveIcon(String iconKey) {
        if ("login".equals(iconKey)) {
            return UIManager.getIcon("FileView.computerIcon");
        }
        if ("add".equals(iconKey)) {
            return UIManager.getIcon("FileChooser.newFolderIcon");
        }
        if ("delete".equals(iconKey)) {
            return UIManager.getIcon("OptionPane.errorIcon");
        }
        if ("search".equals(iconKey)) {
            return UIManager.getIcon("FileView.directoryIcon");
        }
        if ("issue".equals(iconKey)) {
            return UIManager.getIcon("OptionPane.informationIcon");
        }
        if ("return".equals(iconKey)) {
            return UIManager.getIcon("OptionPane.questionIcon");
        }
        if ("view".equals(iconKey)) {
            return UIManager.getIcon("FileView.fileIcon");
        }
        if ("logout".equals(iconKey)) {
            return UIManager.getIcon("InternalFrame.closeIcon");
        }
        return UIManager.getIcon("OptionPane.informationIcon");
    }
}