Math_Learning/src/View/Main_frame.java

package View;

import Service.Exam_service;
import Service.User_service;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class Main_frame extends JFrame {
    private User_service userService;
    private String email;
    private JComboBox<String> typeComboBox;
    private JTextField countField;

    public Main_frame(User_service userService, String email) {
        this.userService = userService;
        this.email = email;
        initializeUI();
    }

    private void initializeUI() {
        setTitle("主界面");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(500, 400);
        setLocationRelativeTo(null);
        setResizable(false);

        // 主面板
        JPanel mainPanel = new JPanel(new BorderLayout(10, 10));
        mainPanel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));

        // 标题
        JLabel titleLabel = new JLabel("数学学习软件", JLabel.CENTER);
        titleLabel.setFont(new Font("微软雅黑", Font.BOLD, 24));
        mainPanel.add(titleLabel, BorderLayout.NORTH);

        // 设置面板
        JPanel settingPanel = new JPanel(new GridLayout(2, 2, 10, 10));

        settingPanel.add(new JLabel("选择难度:"));
        typeComboBox = new JComboBox<>(new String[]{"小学", "初中", "高中"});
        settingPanel.add(typeComboBox);

        settingPanel.add(new JLabel("题目数量:"));
        countField = new JTextField("10");
        settingPanel.add(countField);

        mainPanel.add(settingPanel, BorderLayout.CENTER);

        // 按钮面板
        JPanel buttonPanel = new JPanel(new FlowLayout(FlowLayout.CENTER, 20, 10));
        buttonPanel.setBorder(BorderFactory.createEmptyBorder(10, 0, 0, 0));
        JButton startButton = new JButton("开始做题");
        JButton changePasswordButton = new JButton("修改密码");
        JButton logoutButton = new JButton("退出登录");
        JButton UnregisterButton = new JButton("删除账号");

        buttonPanel.add(startButton);
        buttonPanel.add(changePasswordButton);
        buttonPanel.add(logoutButton);
        buttonPanel.add(UnregisterButton);

        mainPanel.add(buttonPanel, BorderLayout.SOUTH);

        // 添加事件监听器
        startButton.addActionListener(new StartListener());
        changePasswordButton.addActionListener(e -> openChangePasswordFrame());
        logoutButton.addActionListener(e -> openLoginFrame());
        UnregisterButton.addActionListener(e-> UnregisterOperation());

        add(mainPanel);
    }

    private class StartListener implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
            String type = (String) typeComboBox.getSelectedItem();
            String countText = countField.getText().trim();

            if (countText.isEmpty()) {
                JOptionPane.showMessageDialog(Main_frame.this,
                        "请输入题目数量", "错误", JOptionPane.ERROR_MESSAGE);
                return;
            }

            int count;
            try {
                count = Integer.parseInt(countText);
            } catch (NumberFormatException ex) {
                JOptionPane.showMessageDialog(Main_frame.this,
                        "题目数量必须是数字", "错误", JOptionPane.ERROR_MESSAGE);
                return;
            }

            if (count < 10 || count > 30) {
                JOptionPane.showMessageDialog(Main_frame.this,
                        "题目数量必须在10-30之间", "错误", JOptionPane.ERROR_MESSAGE);
                return;
            }

            // 创建考试服务
            Exam_service examService = new Exam_service(count, type, userService.find_user(email).get_id());
            openExamFrame(examService);
        }
    }

    private void openExamFrame(Exam_service examService) {
        Exam_frame examFrame = new Exam_frame(examService, userService, email);
        examFrame.setVisible(true);
        this.dispose();
    }

    private void openChangePasswordFrame() {
        JPasswordField oldPasswordField = new JPasswordField();
        JPasswordField newPasswordField = new JPasswordField();
        JPasswordField confirmPasswordField = new JPasswordField();

        JPanel panel = new JPanel(new GridLayout(3, 2));
        panel.add(new JLabel("原密码:"));
        panel.add(oldPasswordField);
        panel.add(new JLabel("新密码:"));
        panel.add(newPasswordField);
        panel.add(new JLabel("确认新密码:"));
        panel.add(confirmPasswordField);

        int result = JOptionPane.showConfirmDialog(this, panel, "修改密码", JOptionPane.OK_CANCEL_OPTION);
        if (result == JOptionPane.OK_OPTION) {
            String oldPassword = new String(oldPasswordField.getPassword());
            String newPassword = new String(newPasswordField.getPassword());
            String confirmPassword = new String(confirmPasswordField.getPassword());

            if (!newPassword.equals(confirmPassword)) {
                JOptionPane.showMessageDialog(this,
                        "两次输入的新密码不一致", "错误", JOptionPane.ERROR_MESSAGE);
                return;
            }

            String changeResult = userService.change_pwd(email, oldPassword, newPassword);
            JOptionPane.showMessageDialog(this, changeResult, "修改密码", JOptionPane.INFORMATION_MESSAGE);
        }
    }

    private void openLoginFrame() {
        Login_frame loginFrame = new Login_frame(userService);
        loginFrame.setVisible(true);
        this.dispose();
    }

    private void UnregisterOperation(){
        String result=userService.Unregister(email);
        JOptionPane.showMessageDialog(this, result, "删除账号", JOptionPane.INFORMATION_MESSAGE);
        openLoginFrame();
    }
}