MathLearningSoftware/src/com/mathlearning/view/LoginFrame.java

package com.mathlearning.view;

import com.mathlearning.controller.AuthController;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class LoginFrame extends JFrame {
  private AuthController authController;
  private JTextField emailField;
  private JPasswordField passwordField;

  public LoginFrame() {
    this.authController = new AuthController();
    initializeUI();
  }

  private void initializeUI() {
    setTitle("数学学习软件 - 登录");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(500, 400);
    setLocationRelativeTo(null);
    setResizable(false);

    // 使用更灵活的布局
    JPanel mainPanel = new JPanel();
    mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));
    mainPanel.setBorder(BorderFactory.createEmptyBorder(30, 40, 30, 40));

    // 标题
    JLabel titleLabel = new JLabel("数学学习软件", JLabel.CENTER);
    titleLabel.setFont(new Font("Microsoft YaHei", Font.BOLD, 28));
    titleLabel.setAlignmentX(Component.CENTER_ALIGNMENT);
    titleLabel.setBorder(BorderFactory.createEmptyBorder(0, 0, 30, 0));
    mainPanel.add(titleLabel);

    // 添加一些间距
    mainPanel.add(Box.createRigidArea(new Dimension(0, 20)));

    // 邮箱输入区域
    JPanel emailPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    emailPanel.setMaximumSize(new Dimension(400, 60));

    JLabel emailLabel = new JLabel("邮箱:");
    emailLabel.setFont(new Font("Microsoft YaHei", Font.PLAIN, 16));
    emailLabel.setPreferredSize(new Dimension(80, 30));

    emailField = new JTextField();
    emailField.setFont(new Font("Microsoft YaHei", Font.PLAIN, 14));
    emailField.setPreferredSize(new Dimension(250, 35));

    emailPanel.add(emailLabel);
    emailPanel.add(emailField);
    mainPanel.add(emailPanel);

    // 添加间距
    mainPanel.add(Box.createRigidArea(new Dimension(0, 15)));

    // 密码输入区域
    JPanel passwordPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    passwordPanel.setMaximumSize(new Dimension(400, 60));

    JLabel passwordLabel = new JLabel("密码:");
    passwordLabel.setFont(new Font("Microsoft YaHei", Font.PLAIN, 16));
    passwordLabel.setPreferredSize(new Dimension(80, 30));

    passwordField = new JPasswordField();
    passwordField.setFont(new Font("Microsoft YaHei", Font.PLAIN, 14));
    passwordField.setPreferredSize(new Dimension(250, 35));

    passwordPanel.add(passwordLabel);
    passwordPanel.add(passwordField);
    mainPanel.add(passwordPanel);

    // 添加间距
    mainPanel.add(Box.createRigidArea(new Dimension(0, 30)));

    // 按钮区域 - 只有登录和注册按钮
    JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 0));
    buttonPanel.setMaximumSize(new Dimension(400, 50));

    JButton loginButton = createStyledButton("登录", new Color(70, 130, 180));
    JButton registerButton = createStyledButton("注册", new Color(60, 179, 113));

    buttonPanel.add(loginButton);
    buttonPanel.add(registerButton);

    mainPanel.add(buttonPanel);

    // 添加底部间距
    mainPanel.add(Box.createVerticalGlue());

    // 添加操作监听器
    loginButton.addActionListener(new LoginAction());
    registerButton.addActionListener(e -> openRegisterFrame());

    add(mainPanel);
  }

  private JButton createStyledButton(String text, Color color) {
    JButton button = new JButton(text);
    button.setFont(new Font("Microsoft YaHei", Font.BOLD, 14));
    button.setBackground(color);
    button.setForeground(Color.WHITE);
    button.setFocusPainted(false);
    button.setBorder(BorderFactory.createEmptyBorder(10, 20, 10, 20));
    button.setCursor(new Cursor(Cursor.HAND_CURSOR));

    // 添加鼠标悬停效果
    button.addMouseListener(
        new java.awt.event.MouseAdapter() {
          public void mouseEntered(java.awt.event.MouseEvent evt) {
            button.setBackground(color.darker());
          }

          public void mouseExited(java.awt.event.MouseEvent evt) {
            button.setBackground(color);
          }
        });

    return button;
  }

  private class LoginAction implements ActionListener {
    @Override
    public void actionPerformed(ActionEvent e) {
      String email = emailField.getText().trim();
      String password = new String(passwordField.getPassword());

      if (email.isEmpty() || password.isEmpty()) {
        JOptionPane.showMessageDialog(LoginFrame.this, "请输入邮箱和密码", "错误", JOptionPane.ERROR_MESSAGE);
        return;
      }

      if (authController.login(email, password)) {
        JOptionPane.showMessageDialog(
            LoginFrame.this, "登录成功!", "成功", JOptionPane.INFORMATION_MESSAGE);
        openLevelSelectionFrame();
      } else {
        JOptionPane.showMessageDialog(LoginFrame.this, "邮箱或密码错误", "错误", JOptionPane.ERROR_MESSAGE);
      }
    }
  }

  private void openRegisterFrame() {
    RegisterFrame registerFrame = new RegisterFrame();
    registerFrame.setVisible(true);
    this.dispose();
  }

  private void openLevelSelectionFrame() {
    LevelSelectionFrame levelFrame = new LevelSelectionFrame(authController);
    levelFrame.setVisible(true);
    this.dispose();
  }
}