BankingGUI.java

package banking;

import javax.swing.*;
import java.awt.*;
import java.sql.Connection;
import banking.panels.*;

public class BankingGUI extends JFrame {
    public static final String WELCOME_PANEL = "WELCOME";
    public static final String LOGIN_PANEL = "LOGIN";
    public static final String SIGNUP_PANEL = "SIGNUP";
    public static final String DASHBOARD_PANEL = "DASHBOARD";
    public static final String TRANSACTION_HISTORY_PANEL = "TRANSACTION_HISTORY";


    // Vibrant modern color scheme
    public static final Color PRIMARY_COLOR = new Color(79, 70, 229);      // Indigo
    public static final Color SUCCESS_COLOR = new Color(16, 185, 129);      // Emerald
    public static final Color DANGER_COLOR = new Color(239, 68, 68);        // Red
    public static final Color BACKGROUND = new Color(17, 24, 39);           // Dark gray
    public static final Color CARD_BG = new Color(31, 41, 55);              // Card background
    public static final Color ACCENT_COLOR = new Color(236, 72, 153);       // Pink accent

    private CardLayout cardLayout;
    private JPanel mainPanel;
    private int currentAccountNo = -1;
    private String currentUserName = "";
    private BankingService service;
    private Connection connection;

    public BankingGUI() {
        setupModernTheme();
        initializeConnection();
        initializeFrame();
        initializePanels();
        showPanel(WELCOME_PANEL);
    }

    private void setupModernTheme() {
        try {
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
            UIManager.put("Button.font", new Font("Segoe UI", Font.BOLD, 14));
            UIManager.put("Label.font", new Font("Segoe UI", Font.PLAIN, 14));
            UIManager.put("TextField.font", new Font("Segoe UI", Font.PLAIN, 14));
            UIManager.put("PasswordField.font", new Font("Segoe UI", Font.PLAIN, 14));
        } catch (Exception e) {
            System.err.println("Could not set theme: " + e.getMessage());
        }
    }

    private void initializeConnection() {
        try {
            connection = DatabaseConnection.getConnection();
            if (connection == null) {
                showErrorAndExit("Database Connection Failed",
                        "Unable to connect to the database. Please check MySQL is running.");
            }
            service = new BankingService(connection);
            System.out.println("Banking service initialized successfully");
        } catch (Exception e) {
            e.printStackTrace();
            showErrorAndExit("Initialization Error",
                    "Failed to initialize banking service: " + e.getMessage());
        }
    }

    private void initializeFrame() {
        setTitle("Bank Management System");
        setSize(750, 600);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        setResizable(false);
        getContentPane().setBackground(BACKGROUND);
    }

    private void initializePanels() {
        cardLayout = new CardLayout();
        mainPanel = new JPanel(cardLayout);
        mainPanel.setBackground(BACKGROUND);

        mainPanel.add(new WelcomePanel(this), WELCOME_PANEL);
        mainPanel.add(new LoginPanel(this), LOGIN_PANEL);
        mainPanel.add(new SignupPanel(this), SIGNUP_PANEL);

        add(mainPanel);
    }
    public void showTransactionHistory() {
        for (Component comp : mainPanel.getComponents()) {
            if (comp instanceof TransactionHistoryPanel) {
                mainPanel.remove(comp);
                break;
            }
        }
        mainPanel.add(new TransactionHistoryPanel(this), TRANSACTION_HISTORY_PANEL);
        showPanel(TRANSACTION_HISTORY_PANEL);
    }


    public void showPanel(String panelName) {
        cardLayout.show(mainPanel, panelName);
    }

    public void showDashboard() {
        for (Component comp : mainPanel.getComponents()) {
            if (comp instanceof DashboardPanel) {
                mainPanel.remove(comp);
                break;
            }
        }
        mainPanel.add(new DashboardPanel(this), DASHBOARD_PANEL);
        showPanel(DASHBOARD_PANEL);
    }

    public void resetSession() {
        currentAccountNo = -1;
        currentUserName = "";
        showPanel(WELCOME_PANEL);
    }

    private void showErrorAndExit(String title, String message) {
        JOptionPane.showMessageDialog(null, message, title, JOptionPane.ERROR_MESSAGE);
        System.exit(1);
    }

    private void cleanup() {
        try {
            if (connection != null && !connection.isClosed()) {
                connection.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void dispose() {
        cleanup();
        super.dispose();
    }

    public int getCurrentAccountNo() { return currentAccountNo; }
    public void setCurrentAccountNo(int accountNo) { this.currentAccountNo = accountNo; }
    public String getCurrentUserName() { return currentUserName; }
    public void setCurrentUserName(String userName) { this.currentUserName = userName; }
    public BankingService getService() { return service; }
    public CardLayout getCardLayout() { return cardLayout; }
    public JPanel getMainPanel() { return mainPanel; }
}