import javafx.application.Application;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.collections.FXCollections;
import javafx.event.EventHandler;
import javafx.scene.control.TableColumn.CellEditEvent;
import javafx.scene.control.cell.TextFieldTableCell;

public class App extends Application {

    private TableView<Employee> table = new TableView<>();
    private TextField nameInput, cityInput, salaryInput;

    public static void main(String[] args) {
        launch(args);
    }
    
    @Override
    public void start(Stage primaryStage) throws Exception {

        TableColumn<Employee, String> nameCol = new TableColumn<>("Név");
        nameCol.setMinWidth(100);
        nameCol.setCellValueFactory(new PropertyValueFactory<>("name"));

        TableColumn<Employee, String> cityCol = new TableColumn<>("Település");
        cityCol.setMinWidth(100);
        cityCol.setCellValueFactory(new PropertyValueFactory<>("city"));


        TableColumn<Employee, String> salaryCol = new TableColumn<>("Fizetés");
        salaryCol.setMinWidth(100);
        salaryCol.setCellValueFactory(new PropertyValueFactory<>("salary"));


        nameCol.setCellFactory(
            TextFieldTableCell.<Employee>forTableColumn()    
        );

        cityCol.setCellFactory(
            TextFieldTableCell.<Employee>forTableColumn()    
        );

        salaryCol.setCellFactory(
            TextFieldTableCell.<Employee>forTableColumn()    
        );

        nameCol.setOnEditCommit(
            new EventHandler<CellEditEvent<Employee, String>>() {
                @Override
                public void handle(CellEditEvent<Employee, String> t) {
                    ((Employee) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())
                        ).setName(t.getNewValue());
                }
            }
        );

        cityCol.setOnEditCommit(
            new EventHandler<CellEditEvent<Employee, String>>() {
                @Override
                public void handle(CellEditEvent<Employee, String> t) {
                    ((Employee) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())
                        ).setCity(t.getNewValue());
                }
            }
        );

        salaryCol.setOnEditCommit(
            new EventHandler<CellEditEvent<Employee, String>>() {
                @Override
                public void handle(CellEditEvent<Employee, String> t) {
                    ((Employee) t.getTableView().getItems().get(
                        t.getTablePosition().getRow())
                        ).setSalary(t.getNewValue());
                }
            }
        );

        table.setEditable(true);

        nameInput = new TextField();
        nameInput.setPromptText("Név");

        cityInput = new TextField();
        cityInput.setPromptText("Település");

        salaryInput = new TextField();
        salaryInput.setPromptText("Fizetés");


        Button addButton = new Button("Hozzáad");
        addButton.setOnAction(e->onClickAddButton());
        Button delButton = new Button("Törlés");
        delButton.setOnAction(e->onClickDelButton());

        HBox inputBox = new HBox(10);
        inputBox.setPadding(new Insets(10, 10, 10, 10));
        inputBox.setSpacing(10);
        inputBox.getChildren().addAll(
            nameInput, cityInput, salaryInput
        );
        HBox buttonBox = new HBox(10);
        buttonBox.setPadding(new Insets(10, 10, 10, 10));
        buttonBox.setSpacing(10);
        buttonBox.getChildren().addAll(
            addButton, delButton
        );

        
        VBox vbox = new VBox();
        vbox.getChildren().addAll(table, inputBox, buttonBox);

        table.setItems(getEmployees());

        table.getColumns().add(nameCol);
        table.getColumns().add(cityCol);
        table.getColumns().add(salaryCol);

        Scene scene = new Scene(vbox, 302, 250);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    private void onClickAddButton() {
        String name = this.nameInput.getText();
        String city = this.cityInput.getText();
        double salary = Double.parseDouble(this.salaryInput.getText());
        Employee employee = new Employee(name, city, salary);
        table.getItems().add(employee);
        this.nameInput.clear();
        this.cityInput.clear();
        this.salaryInput.clear();
    }

    private void onClickDelButton() {
        ObservableList<Employee> selectedEmployee, employees;
        employees = table.getItems();
        selectedEmployee = table.getSelectionModel().getSelectedItems();
        selectedEmployee.forEach(employees::remove);
    }

    private ObservableList<Employee> getEmployees() {

        ObservableList<Employee> employees = 
        FXCollections.observableArrayList(
                new Employee("Poros Béla", "Szeged", 2870000), 
                new Employee("Tér Irén", "Szeged", 2435000),
                new Employee("Pakos Péter", "Hatvan", 2530000), 
                new Employee("Szu Emese", "Szolnok", 2270000));
        return employees;
    }

}