PAIR/src/main/java/com/mathquiz/ui/LoginPanel.java

package com.mathquiz.ui;

import com.mathquiz.model.User;
import javafx.geometry.Insets;
import javafx.scene.control.*;
import javafx.scene.layout.VBox;

public class LoginPanel extends VBox {

    private final TextField emailField = new TextField();
    private final PasswordField pwdField = new PasswordField();

    public LoginPanel(MainWindow mainWindow) {
        setPadding(new Insets(20));
        setSpacing(10);

        getChildren().addAll(
                new Label("登录"),
                new Label("邮箱:"),
                emailField,
                new Label("密码:"),
                pwdField,
                new Button("登录") {{
                    setOnAction(e -> loginAction(mainWindow));
                }},
                new Hyperlink("没有账号？去注册") {{
                    setOnAction(e -> mainWindow.showRegisterPanel());
                }}
        );
    }

    private void loginAction(MainWindow mainWindow) {
        String email = emailField.getText().trim();
        String password = pwdField.getText();

        User user = mainWindow.getUserService().login(email, password);
        if (user != null) {
            mainWindow.setCurrentUser(user);
            mainWindow.showGradeSelectPanel();
        } else {
            new Alert(Alert.AlertType.ERROR, "邮箱或密码错误").showAndWait();
        }
    }
}