/**
 * My texteditor can open, close, clear, save, and save as.
 *
 * @author Henning Scharf
 */

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

import javafx.application.Application;
import javafx.application.Platform;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.control.TextArea;
import javafx.scene.layout.Priority;
import javafx.scene.layout.VBox;
import javafx.stage.FileChooser;
import javafx.stage.Stage;

public class TextEditor extends Application {
    // saves the path of my working file
    private static String lastSaved;

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

    @Override
    public void start(Stage primaryStage) throws Exception {
        primaryStage.setTitle("TextEditor");
        VBox vbox = new VBox(1.0);
        // 1 textarea
        TextArea txt = new TextArea("");
        // 1 Menubar
        final MenuBar menubar = new MenuBar();
        // I thought about only using 1 "File" because other programs handle it
        // similar
        Menu menuFile = new Menu("Datei");
        menubar.getMenus().addAll(menuFile);

        // Here i add my Menu Items
        MenuItem menuOpen1 = new MenuItem("Neu");
        MenuItem menuOpen2 = new MenuItem("Öffnen");
        MenuItem menuOpen3 = new MenuItem("Speichern");
        MenuItem menuOpen4 = new MenuItem("Speichern unter");
        MenuItem menuOpen5 = new MenuItem("Schließen");

        // now i add my items to "Datei"
        menuFile.getItems().addAll(menuOpen1, menuOpen2, menuOpen3, menuOpen4,
                menuOpen5);
        // this one resets my textarea
        menuOpen1.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent arg0) {
                txt.clear();
                lastSaved = null;

            }
        });

        //open
        menuOpen2.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent arg0) {
                txt.clear();
                FileChooser fchoose = new FileChooser();
                fchoose.setTitle("Open Menu");
                fchoose.setSelectedExtensionFilter(new FileChooser.ExtensionFilter(
                        "*.txt", "*.log", "*.txt", "*.log"));
                File choosenFile = fchoose.showOpenDialog(primaryStage);

                if (choosenFile != null) {
                    try {
                        // read my text
                        BufferedReader reader = new BufferedReader(
                                new FileReader(choosenFile));
                        // puffer string
                        String puffer;
                        try {
                            while ((puffer = reader.readLine()) != null) {
                                // add text and enters
                                txt.appendText(puffer);
                                txt.appendText(System.lineSeparator());
                            }

                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    }

                }
                // set my working file
                lastSaved = choosenFile.getAbsolutePath();
            }
        });
        //save
        menuOpen3.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent arg0) {
                // check if this is the first file used in this instance
                if (lastSaved != null) {

                    FileWriter fWriter = null;

                    try {
                        // write my text in my file
                        fWriter = new FileWriter(lastSaved);
                        fWriter.write(txt.getText());

                    } catch (IOException e) {
                        e.printStackTrace();
                    } finally {
                        try {
                            // cant write without closing
                            fWriter.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                    // use save as if it is the first one
                } else {
                    FileChooser fchoose = new FileChooser();
                    fchoose.setTitle("Save as Menu");
                    // setting file endings
                    fchoose.setSelectedExtensionFilter(new FileChooser.ExtensionFilter(
                            "*.txt", "*.log", "*.txt", "*.log"));
                    // show file
                    File choosenFile = fchoose.showSaveDialog(primaryStage);

                    FileWriter fWriter = null;
                    // checks if i have a txt ending already
                    if (choosenFile != null
                            && !choosenFile.getName().contains(".txt")) {
                        choosenFile = new File(choosenFile + ".txt");
                    }

                    try {
                        // if i have no working path so i will "save as"
                        fWriter = new FileWriter(choosenFile);

                        // writes
                        fWriter.write(txt.getText());
                        fWriter.flush();

                    } catch (IOException e) {
                        e.printStackTrace();
                    } finally {
                        try {
                            // cant write without closing
                            fWriter.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }

                    lastSaved = choosenFile.getAbsolutePath();

                }

            }
        });

        //save as
        menuOpen4.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent arg0) {
                FileChooser fchoose = new FileChooser();
                fchoose.setTitle("Save as Menu");
                // file endings
                fchoose.setSelectedExtensionFilter(new FileChooser.ExtensionFilter(
                        "*.txt", "*.log", "*.txt", "*.log"));
                // show file
                File choosenFile = fchoose.showSaveDialog(primaryStage);

                FileWriter fWriter = null;
                // checks if i have a txt ending already
                if (choosenFile != null
                        && !choosenFile.getName().endsWith(".txt")) {
                    choosenFile = new File(choosenFile.getName() + ".txt");
                }

                try {

                    fWriter = new FileWriter(choosenFile);

                    // write my text in my file
                    fWriter.write(txt.getText());

                } catch (IOException e) {
                    e.printStackTrace();
                } finally {
                    try {

                        fWriter.close();

                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                // sets working path
                lastSaved = choosenFile.getAbsolutePath();

            }

        });
        // this one closes my Stage
        menuOpen5.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent arg0) {
                primaryStage.close();
                Platform.exit();

            }
        });

        // here i let my textarea grow with my window
        VBox.setVgrow(txt, Priority.ALWAYS);
        // this one adds everything to my box
        vbox.getChildren().addAll(menubar, txt);
        // this shows my box
        Scene scene = new Scene(vbox);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

}