import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;

public class BaseConverterApp extends Application {

    private TextField inputField;
    private ComboBox<Integer> fromBaseBox;
    private ComboBox<Integer> toBaseBox;
    private TextField resultField;

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("Base Converter");

        // 创建网格布局
        GridPane grid = new GridPane();
        grid.setPadding(new Insets(10, 10, 10, 10));
        grid.setVgap(10);
        grid.setHgap(10);

        // 创建输入框
        Label inputLabel = new Label("Input Number:");
        grid.add(inputLabel, 0, 0);
        inputField = new TextField();
        grid.add(inputField, 1, 0);

        // 创建“From Base”下拉菜单
        Label fromBaseLabel = new Label("From Base:");
        grid.add(fromBaseLabel, 0, 1);
        fromBaseBox = new ComboBox<>();
        for (int i = 2; i <= 16; i++) {
            fromBaseBox.getItems().add(i);
        }
        fromBaseBox.setValue(2);  // 默认二进制
        grid.add(fromBaseBox, 1, 1);

        // 创建“To Base”下拉菜单
        Label toBaseLabel = new Label("To Base:");
        grid.add(toBaseLabel, 0, 2);
        toBaseBox = new ComboBox<>();
        for (int i = 2; i <= 16; i++) {
            toBaseBox.getItems().add(i);
        }
        toBaseBox.setValue(2);  // 默认二进制
        grid.add(toBaseBox, 1, 2);

        // 创建结果框
        Label resultLabel = new Label("Result:");
        grid.add(resultLabel, 0, 3);
        resultField = new TextField();
        resultField.setEditable(false);  // 结果框为只读
        grid.add(resultField, 1, 3);

        // 创建转换按钮
        Button convertButton = new Button("Convert");
        convertButton.setOnAction(e -> convert());
        grid.add(convertButton, 0, 4, 2, 1);

        // 设置场景并显示
        Scene scene = new Scene(grid, 300, 250);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private void convert() {
        try {
            // 获取输入的数字和选择的进制
            String inputNumber = inputField.getText();
            int fromBase = fromBaseBox.getValue();
            int toBase = toBaseBox.getValue();

            // 将输入的数字从起始进制转换为十进制
            int decimalValue = Integer.parseInt(inputNumber, fromBase);

            // 将十进制数字转换为目标进制
            String result = Integer.toString(decimalValue, toBase).toUpperCase();

            // 显示转换结果
            resultField.setText(result);
        } catch (NumberFormatException ex) {
            // 如果输入无效，显示错误信息
            resultField.setText("Invalid Input");
        }
    }
}