package Calculator;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;

public class CalculatorAPP extends Application {

    private TextField numberField;
    private TextField fromBaseField;
    private TextField toBaseField;
    private Label resultLabel;

    @Override
    public void start(Stage primaryStage) {
        // 创建UI组件
        Label numberLabel = new Label("请输入要转换的数：");
        numberField = new TextField();

        Label fromBaseLabel = new Label("请输入源进制(2-16)：");
        fromBaseField = new TextField();

        Label toBaseLabel = new Label("请输入目标进制(2-16)：");
        toBaseField = new TextField();

        Button convertButton = new Button("转换");
        resultLabel = new Label();

        // 创建布局
        GridPane gridPane = new GridPane();
        gridPane.setAlignment(Pos.CENTER);
        gridPane.setHgap(10);
        gridPane.setVgap(10);
        gridPane.setPadding(new Insets(20));

        // 添加组件到布局
        gridPane.add(numberLabel, 0, 0);
        gridPane.add(numberField, 1, 0);
        gridPane.add(fromBaseLabel, 0, 1);
        gridPane.add(fromBaseField, 1, 1);
        gridPane.add(toBaseLabel, 0, 2);
        gridPane.add(toBaseField, 1, 2);
        gridPane.add(convertButton, 0, 3);
        gridPane.add(resultLabel, 1, 3);

        // 为按钮添加事件监听器
        convertButton.setOnAction(e -> {
            try {
                String num = numberField.getText();
                int fromBase = Integer.parseInt(fromBaseField.getText());
                int toBase = Integer.parseInt(toBaseField.getText());

                // 调用转换方法
                String converted = convertBase(num, fromBase, toBase);

                // 更新结果显示
                resultLabel.setText(String.format("%s (%d进制) 转换为 (%d进制) 是 %s", num, fromBase, toBase, converted));
            } catch (NumberFormatException ex) {
                resultLabel.setText("输入有误，请检查输入是否正确。");
            }
        });

        // 创建场景
        Scene scene = new Scene(gridPane, 400, 300);

        // 设置舞台
        primaryStage.setTitle("进制转换器");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static String convertBase(String num, int fromBase, int toBase) {
        // 将给定的fromBase进制数转换为十进制数
        int decimalNum = Integer.parseInt(num, fromBase);

        // 定义字符集以表示大于10的进制数
        char[] digits = "0123456789ABCDEF".toCharArray();

        // 如果目标进制是10，则直接返回decimalNum
        if (toBase == 10) {
            return String.valueOf(decimalNum);
        }

        // 否则，从十进制转换为目标进制
        StringBuilder result = new StringBuilder();
        while (decimalNum > 0) {
            int remainder = decimalNum % toBase;
            result.insert(0, digits[remainder]);
            decimalNum /= toBase;
        }

        return result.toString();
    }

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