/*
 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
 */

package helloworld;

import java.io.File;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ChoiceBox;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.stage.DirectoryChooser;
import javafx.stage.FileChooser;
import javafx.stage.Stage;

public final class HelloFileChooser extends Application {
    @Override
    public void start(final Stage stage) {
        stage.setTitle("Hello File Chooser");

        final Label titleLabel = new Label("Title:");
        final TextField titleTextField = new TextField();

        final Label directoryLabel = new Label("Initial directory:");

        final Pane directoryPanel = new HBox(6);
        final TextField directoryTextField = new TextField();
//        directoryTextField.setEditable(false);
        final Button browseButton = new Button("...");
        directoryPanel.getChildren().addAll(directoryTextField, browseButton);

        browseButton.setOnAction(
                new EventHandler<ActionEvent>() {
                    @Override
                    public void handle(final ActionEvent e) {
                        final DirectoryChooser directoryChooser =
                                new DirectoryChooser();

                        final String initialDirectory =
                                directoryTextField.getText();
                        directoryChooser.setInitialDirectory(
                                (initialDirectory.length() > 0)
                                        ? new File(initialDirectory)
                                        : null);

                        final File selectedDirectory =
                                directoryChooser.showDialog(stage);
                        if (selectedDirectory != null) {
                            directoryTextField.setText(
                                    selectedDirectory.getAbsolutePath());
                        }
                    }
                });

        final Label fileTypesLabel = new Label("File Types:");
        final ChoiceBox<FileTypeRecord> fileTypesChoiceBox =
                new ChoiceBox<FileTypeRecord>(
                    FXCollections.observableArrayList(
                            new FileTypeRecord("All Files", "*.*"),
                            new FileTypeRecord("Text Files", "*.txt")));
        fileTypesChoiceBox.getSelectionModel().selectFirst();

        final GridPane inputGridPane = new GridPane();

        GridPane.setConstraints(titleLabel, 0, 0);
        GridPane.setConstraints(titleTextField, 1, 0);
        GridPane.setConstraints(directoryLabel, 0, 1);
        GridPane.setConstraints(directoryPanel, 1, 1);
        GridPane.setConstraints(fileTypesLabel, 0, 2);
        GridPane.setConstraints(fileTypesChoiceBox, 1, 2);
        inputGridPane.setHgap(6);
        inputGridPane.setVgap(6);
        inputGridPane.getChildren().addAll(titleLabel, titleTextField,
                                           directoryLabel, directoryPanel,
                                           fileTypesLabel, fileTypesChoiceBox);

        final FileChooser fileChooser = new FileChooser();

        final Button openButton = new Button("Open...");
        final Button openMultipleButton = new Button("Open Multiple...");
        final Button saveButton = new Button("Save...");

        openButton.setOnAction(
                new EventHandler<ActionEvent>() {
                    @Override
                    public void handle(final ActionEvent e) {
                        configureFileChooser(fileChooser,
                                             titleTextField.getText(),
                                             directoryTextField.getText(),
                                             fileTypesChoiceBox
                                                    .getSelectionModel()
                                                    .getSelectedItem());
                        System.out.println(fileChooser.showOpenDialog(stage));
                    }
                });

        openMultipleButton.setOnAction(
                new EventHandler<ActionEvent>() {
                    @Override
                    public void handle(final ActionEvent e) {
                        configureFileChooser(fileChooser,
                                             titleTextField.getText(),
                                             directoryTextField.getText(),
                                             fileTypesChoiceBox
                                                    .getSelectionModel()
                                                    .getSelectedItem());
                        System.out.println(
                                fileChooser.showOpenMultipleDialog(stage));
                    }
                });

        saveButton.setOnAction(
                new EventHandler<ActionEvent>() {
                    @Override
                    public void handle(final ActionEvent e) {
                        configureFileChooser(fileChooser,
                                             titleTextField.getText(),
                                             directoryTextField.getText(),
                                             fileTypesChoiceBox
                                                    .getSelectionModel()
                                                    .getSelectedItem());
                        System.out.println(fileChooser.showSaveDialog(stage));
                    }
                });

        final Pane buttonPanel = new HBox(6);
        buttonPanel.getChildren().addAll(openButton, openMultipleButton,
                                         saveButton);

        final Pane rootGroup = new VBox(12);
        rootGroup.getChildren().addAll(inputGridPane, buttonPanel);
        rootGroup.setPadding(new Insets(12, 12, 12, 12));

        stage.setScene(new Scene(rootGroup));
        stage.show();
    }

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

    private static void configureFileChooser(
            final FileChooser fileChooser,
            final String title,
            final String initialDirectory,
            final FileTypeRecord fileTypeRecord) {
        fileChooser.setTitle(title);
        fileChooser.setInitialDirectory(
                (initialDirectory.length() > 0) ? new File(initialDirectory)
                                                : null);
        fileChooser.getExtensionFilters().setAll(fileTypeRecord.getFilter());
    }

    private static final class FileTypeRecord {
        private final FileChooser.ExtensionFilter filter;

        public FileTypeRecord(final String description,
                              final String extension) {
            filter = new FileChooser.ExtensionFilter(description, extension);
        }


        public FileChooser.ExtensionFilter getFilter() {
            return filter;
        }

        @Override
        public String toString() {
            return filter.getDescription();
        }
    }
}