/**************************************************
*   Author: Morrison
*   Date:  20 Oct 202020
**************************************************/

import javafx.application.Application;
import javafx.application.Platform;
import javafx.stage.Stage;
import javafx.stage.FileChooser;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.control.TextArea;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuItem;
import javafx.scene.control.MenuBar;
import java.io.File;
import java.io.FileReader;
import java.io.BufferedReader;
import java.io.IOException;

public class SimpleEdit extends Application
{
    private File file;
    private Stage primary;
    private TextArea ta;
    public SimpleEdit()
    {
        file = null;
        ta = new TextArea();
        ta.setStyle("-fx-font-family:Courier");
    }
    
    @Override
    public void init()
    {
    }

    @Override
    public void start(Stage primary)
    {
        this.primary = primary;
        primary.setTitle("SimpleEdit:  No File Open");
        BorderPane bp = new BorderPane();
        bp.setTop(buildMenus());
        bp.setCenter(ta);
        primary.setScene(new Scene(bp, 800, 600));
        primary.show();
    }
    private MenuBar buildMenus()
    {
        MenuBar mbar = new MenuBar();
        Menu fileMenu = new Menu("File");
        Menu editMenu = new Menu("Edit");
        mbar.getMenus().addAll(fileMenu, editMenu);
        MenuItem newItem = new MenuItem("New");
        MenuItem openItem = new MenuItem("Open...");
        openItem.setOnAction( e ->
        {
            FileChooser fc = new FileChooser();
            fc.setTitle("Open File");
            file = fc.showOpenDialog(primary);
            if(file != null)
            {
                ta.setText(getFileContents(file.getName()));
            }
        });
        MenuItem saveItem = new MenuItem("Save");
        MenuItem saveAsItem = new MenuItem("Save As...");
        MenuItem quitItem = new MenuItem("Quit");
        quitItem.setOnAction( e -> Platform.exit());  //MenuItems are basically buttons.
        fileMenu.getItems().addAll(newItem, openItem, saveItem, saveAsItem, quitItem);
        return mbar;
    }
    private void buildControls(HBox box)
    {
        TextField tf = new TextField();
        tf.setStyle("-fx-font-family:Courier");
        Button goButton = new Button("GO!");
        Button quitButton = new Button("Quit");
        quitButton.setOnAction( e -> Platform.exit());
        goButton.setOnAction( e ->
        {
            //file gets selected and put
            String fileName = tf.getText();
            file = new File(fileName);
            String contents = getFileContents(fileName);
            primary.setTitle(String.format("SimpleEdit:  %s", file.getAbsolutePath()));
            ta.setText(getFileContents(fileName));
        });
        box.getChildren().addAll(tf, goButton, quitButton);
    }
    private String getFileContents(String fileName)
    {
        file = new File(fileName);
        if(! file.exists())
        {
            return String.format("File %s is a heffalump!\n", file.getAbsolutePath());
        }
        try
        {
            StringBuffer sb = new StringBuffer();
            if(file.isFile())
            {
                BufferedReader br = new BufferedReader(new FileReader(file));
                br.lines().forEach( line -> sb.append(line + "\n"));
                br.close();
            }
            else if(file.isDirectory())
            {
                sb.append(String.format("Contents of %s:\n", file.getName()));
                File[] files = file.listFiles();
                for( File f : files)
                {
                    sb.append(f.getName() + "\n");
                }
            }
            return sb.toString().replace("\t", "    ");
        }
        catch(IOException ex)
        {
            ex.printStackTrace();
            return String.format("File %f is mooned by IOException!\n", file.getAbsolutePath());
        }
    }
    //fileName will be a directory's name
    private String listDirectoryContents(String fileName)
    {
        return "";
    }
    @Override
    public void stop()
    {
    }
}