package sample;

import javafx.application.Application;

import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Priority;
import javafx.stage.FileChooser;
import javafx.stage.Stage;
import javafx.stage.WindowEvent;

import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Optional;

public class Main extends Application {
    Stage stage;
    Scene scene;

    Separator seperator;
    Pane rightSpacer = new Pane();


    MenuBar menuBar;
    Menu file;
    TextArea textArea;
    MenuItem open, save, close;

    Label words = new Label("Wörter: 0"), signs = new Label("Zeichen: 0");
    Button trimTextarea = new Button("Trimmen");

    FileChooser fileChooser;

    GridPane gridPane;

    ToolBar toolBar;
    @Override
    public void start(Stage primaryStage) throws Exception{
        stage = primaryStage;

        fileChooser = new FileChooser();

        fileChooser = new FileChooser();
        fileChooser.setTitle("Open Resource File");

        HBox.setHgrow(
                rightSpacer,
                Priority.SOMETIMES
        );
        seperator = new Separator();
        toolBar = new ToolBar(trimTextarea, rightSpacer, words, seperator, signs);

        trimTextarea.setOnAction(event -> trim());

        menuBar = new MenuBar();
        menuBar.setMinWidth(800);
        System.out.println(menuBar.getPrefHeight());
        file = new Menu("Datei");
        open = new MenuItem("Öffnen");
        save = new MenuItem("Speichern");
        close = new MenuItem("Schließen");

        open.setOnAction(event -> open());
        save.setOnAction(event -> save());
        close.setOnAction(event -> close());
        file.getItems().addAll(open, save, close);
        menuBar.getMenus().add(file);

        textArea = new TextArea();
        textArea.setMinHeight(500);
        textArea.setMinWidth(500);
        textArea.setOnKeyPressed(event -> count());

        gridPane = new GridPane();
        gridPane.getChildren().addAll(menuBar, textArea, toolBar);
        GridPane.setConstraints(toolBar, 0, 1);
        GridPane.setConstraints(menuBar, 0, 0);
        GridPane.setConstraints(textArea, 0,2);
        stage.setOnCloseRequest(event -> close(event));

        scene = new Scene(gridPane, 800, 600);
        stage.setScene(scene);
        stage.show();

    }

    void open(){
        File file = fileChooser.showOpenDialog(stage);
        try {
            Path path = Paths.get(file.getAbsolutePath());
            System.out.println(path.toString());
            BufferedReader br = Files.newBufferedReader(path);
            String lines;
            textArea.setText("");
            while ((lines = br.readLine()) != null){
                textArea.setText(textArea.getText() + "\n" + lines);
            }
            br.close();
        }catch (IOException e){
            System.out.println(e.getMessage());
        }
    }

    void save(){
        File file = fileChooser.showOpenDialog(stage);
        Path path = Paths.get(file.getAbsolutePath());
        System.out.println(path.toString());

        try (PrintWriter out = new PrintWriter(path.toString())) {
            out.print(textArea.getText());
        }catch (IOException e){
            System.out.println(e.getMessage());
        }
    }

    void close(WindowEvent event){
        Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
        alert.setTitle("Fenster schließen");
        alert.setContentText("Fortfahren?");

        Optional<ButtonType> result = alert.showAndWait();
        if(result.get() == ButtonType.OK){
            stage.close();
        }else{
            event.consume();
        }
    }

    void close(){
        Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
        alert.setTitle("Fenster schließen");
        alert.setContentText("Fortfahren?");

        Optional<ButtonType> result = alert.showAndWait();
        if(result.get() == ButtonType.OK){
            stage.close();
        }
    }

    void trim(){
        textArea.setText(textArea.getText().replaceAll("( )+", " "));
    }

    void count(){
        String s = textArea.getText();


        int wordCount = 0;

        boolean word = false;
        int endOfLine = s.length() - 1;

        for (int i = 0; i < s.length(); i++) {
            // if the char is a letter, word = true.
            if (Character.isLetter(s.charAt(i)) && i != endOfLine) {
                word = true;
                // if char isn't a letter and there have been letters before,
                // counter goes up.
            } else if (!Character.isLetter(s.charAt(i)) && word) {
                wordCount++;
                word = false;
                // last word of String; if it doesn't end with a non letter, it
                // wouldn't count without this.
            } else if (Character.isLetter(s.charAt(i)) && i == endOfLine) {
                wordCount++;
            }
        }

        words.setText("Wörter: " + wordCount);
        signs.setText("Zeichen: " + s.length());
    }

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