import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.control.Button;
import javafx.stage.Stage;
import javafx.scene.text.Text;
import javafx.scene.control.TextField;
import javafx.scene.layout.Pane;
import javafx.scene.text.Font;


public class main extends Application {
    @Override
    public void start(Stage stage) {
        stage.setTitle("CO2-Emissions Rechner");
        Button button = new Button();

        TextField eingabe = new TextField();
        TextField ausgabe = new TextField();



        ComboBox<String> dropDown = new ComboBox<String>();

        ausgabe.setDisable(true);
        eingabe.setText("6");

        dropDown.getItems().addAll(
                "Car", "Two-Wheelers", "City Bus", "Rail");
        dropDown.setValue("Car");
        button.setText("Calculate");
        button.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                int km = Integer.parseInt(eingabe.getText());
                float emission = 1;
                float co2 = 0;

                if(dropDown.getValue() == "Car"){
                	emission = 124.5f;
                }else if(dropDown.getValue() == "City Bus"){
                	emission = 66.8f;
                }else if(dropDown.getValue() == "Two-Wheelers"){
                	emission = 83.0f;
                }else if(dropDown.getValue() == "Rail"){
                	emission = 45.6f;
                }
                co2 = km * emission;
                ausgabe.setText(Float.toString(co2));
            }
        });

        Text textDistanz = new Text(10, 70, "Distance:");
        Text textCO2 = new Text(10, 200, "CO2:");
        Text textKm = new Text(10, 70, "km");
        Text textDropDown = new Text(10, 120, "Transportation Mode:");

        textKm.setFont(new Font(20));
        textDistanz.setFont(new Font(20));
        textCO2.setFont(new Font(20));
        textDropDown.setFont(new Font(20));

        Pane root = new Pane();
        root.getChildren().add(button);
        root.getChildren().add(eingabe);
        root.getChildren().add(dropDown);
        root.getChildren().add(textDistanz);
        root.getChildren().add(textCO2);
        root.getChildren().add(ausgabe);
        root.getChildren().add(textDropDown);
        root.getChildren().add(textKm);

        ausgabe.setTranslateX(textDropDown.getLayoutX()+250);
        ausgabe.setTranslateY(180);
        eingabe.setTranslateX(textDropDown.getLayoutX()+250);
        eingabe.setTranslateY(50);

        textKm.setTranslateX(eingabe.getTranslateX()+ 150);

        dropDown.setTranslateX(textDropDown.getLayoutX()+250);
        dropDown.setTranslateY(100);

        button.setTranslateX(400);
        button.setTranslateY(100);
        stage.setScene(new Scene(root, 600, 250));
        stage.show();
    }

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