import java.io.IOException;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Alert.AlertType;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.TextField;
import javafx.scene.layout.Priority;
import javafx.scene.layout.VBox;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;

public class App extends Application {

	private WebView webView;

	private TextField resourceName;

	private void load(String url) {
		WebEngine engine = webView.getEngine();
		engine.load("about:blank");
		engine.load(url);

		resourceName.setText("Resource to be loaded: " + url);
	}

	@Override
	public void start(Stage primaryStage) throws Exception {
		primaryStage.setTitle("JavaFX WebView demo");

		String javaVersion = System.getProperty("java.version");
		String javafxVersion = System.getProperty("javafx.version");
		Label l = new Label("Hello, JavaFX " + javafxVersion + ", running on Java " + javaVersion + ".");

		resourceName = new TextField();
		resourceName.setMaxWidth(Double.MAX_VALUE);

		VBox box = new VBox();
		box.getChildren().add(l);
		box.getChildren().add(resourceName);

		webView = new WebView();

		webView.setMinSize(800, 600);
		VBox.setVgrow(webView, Priority.ALWAYS);

		Button remoteHtml = new Button("Load remote Web site.");
		box.getChildren().add(remoteHtml);
		remoteHtml.setOnAction(evt -> load("https://openjfx.io/"));

		URL localHtmlFile = Paths.get("testfiles/HelloWorld.html").toUri().toURL();
		Button localHtml = new Button("Load local HTML file.");
		box.getChildren().add(localHtml);
		localHtml.setOnAction(evt -> load(localHtmlFile.toString()));

		Button remoteMarkDown = new Button("Load remote Markdown file.");
		box.getChildren().add(remoteMarkDown);
		remoteMarkDown.setOnAction(evt -> load("https://raw.githubusercontent.com/openjdk/jfx/master/README.md"));

		Path localMdFile = Paths.get("testfiles/HelloWorld.MD");
		URL localMarkDownFile = localMdFile.toUri().toURL();
		Button localMarkDown = new Button("Load local Markdown (MD) file.");
		box.getChildren().add(localMarkDown);
		localMarkDown.setOnAction(evt -> load(localMarkDownFile.toString()));

		URL localTextFile = Paths.get("testfiles/HelloWorld.TXT").toUri().toURL();
		Button localText = new Button("Load local TXT file.");
		box.getChildren().add(localText);
		localText.setOnAction(evt -> load(localTextFile.toString()));

		Button localMdFileQuickView = new Button("View local MD file");
		localMdFileQuickView.setOnAction(evt -> {
			Alert alert = new Alert(AlertType.INFORMATION);
			alert.setHeaderText("QuickView of local MD file: " + localMdFile.toAbsolutePath());

			try {
				String contents = Files.readAllLines(localMdFile).toString();
				alert.setContentText(contents);
			} catch (IOException e) {
				alert.setContentText("Failed to read local MD file");
			}

			Platform.runLater(() -> alert.showAndWait());

		});
		box.getChildren().add(localMdFileQuickView);
		box.getChildren().add(webView);

		Scene scene = new Scene(box, 800, 700);
		primaryStage.setScene(scene);

		primaryStage.show();

	}

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

}