import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.List;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.SourceDataLine;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextField;

public class Play extends JFrame implements Runnable {
	public static int running;

	JButton select_sound;

	public List sounds;

	public JFileChooser chooser;

	public static String directory;

	Thread th;

	public String played;

	public static JTextField actual_sound;

	public static JButton play_stop_button;

	public JButton prew;

	public JButton next;

	public Play() {
		//zakladni nastaveni GUI
		setTitle("Wav Player");
		setSize(300, 290);
		this.setLayout(new FlowLayout());
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		//pole pro prehravany soubor
		actual_sound = new JTextField(22);
		add(actual_sound);
		actual_sound.setEditable(false);
		//button pro prehravani
		play_stop_button = new JButton(" Přehrát ");

		//button pro posun sklateb dopredu
		next = new JButton(">");
		next.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				//prestane se prehravat
				th.stop();
				
				//zjisteni umisteni a nastaveni aktualniho souboru
				if (sounds.getSelectedIndex() == -1)
					sounds.select(0);
				else
					sounds.select(sounds.getSelectedIndex() + 1);
				
				played = sounds.getSelectedItem();
				running = 0;
				actual_sound.setText(sounds.getSelectedItem());
				play_stop_button.setText(" Přehrát ");
			}
		});
		
		//button pro posun sklateb zpet
		prew = new JButton("<");
		prew.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				th.stop();

				if (sounds.getSelectedIndex() == -1)
					sounds.select(0);
				else
					sounds.select(sounds.getSelectedIndex() - 1);
				played = sounds.getSelectedItem();
				running = 0;
				actual_sound.setText(sounds.getSelectedItem());
				play_stop_button.setText(" Přehrát ");
			}
		});

		add(prew);
		add(play_stop_button);
		add(next);
		
		//nastaveni buttonu pro prehravani a zastaveni prehravani
		play_stop_button.addActionListener(new ActionListener() {
			@SuppressWarnings("deprecation")
			public void actionPerformed(ActionEvent arg0) {
				//running je 1 pokud se prehrava
				if (running == 1) {
					th.stop();
					play_stop_button.setText(" Přehrát ");
					running = 0;
				} else {
					create_thread();
					th.start();
					play_stop_button.setText("  Stop  ");
				}
			}
		});
		
		//button pro JChooser pro vyber hudby
		select_sound = new JButton("Vybrat hudbu");
		select_sound.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				select_folder();
			}
		});
		select_sound.setPreferredSize(new Dimension(280, 20));

		JScrollPane scrool = new JScrollPane();
		
		//list pro seznam sklateb
		sounds = new List(10);
		scrool.add(sounds);
		sounds.add("                                                                                ");
		add(sounds);
		//action listener pro prehrani po kliknuti
		sounds.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				if (running == 1) {
					th.stop();
					running = 0;
				}
				create_thread();
				played = sounds.getSelectedItem();
				th.start();
				play_stop_button.setText("  Stop  ");
			}
		});
		add(select_sound);
		setVisible(true);
	}

	public void create_thread() {
		th = new Thread(this);
	}

	public void select_folder() {
		//filechooser pro vyber adresare s hudbou
		chooser = new JFileChooser();
		chooser.setCurrentDirectory(new java.io.File("."));
		chooser.setDialogTitle("Vyberte adresář s hudbou");
		//nastavime, aby fungoval pouze pro vyber adresare
		chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);

		chooser.setAcceptAllFileFilterUsed(false);

		if (chooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
			//setlabel(String.valueOf(chooser.getSelectedFile()));
			selected(String.valueOf(chooser.getSelectedFile()));
		} else {
			selected("");
		}
	}

	//funkce pro nacteni souboru z adresare
	private void selected(String string) {
		directory = string;

		File dir = new File(directory);
		String[] files;
		files = dir.list();
		//nacteme vsechny soubory z adresare
		for (int i = 0; i < files.length; i++) {
			File f;
			f = new File(dir, files[i]);
			if (f.isDirectory()) {
				;
			} else {
				//pokud se jedna o soubor .wav nebo .au, pridam je do seznamu
				if (files[i].toLowerCase().endsWith(".wav")
						|| files[i].toLowerCase().endsWith(".au"))
					sounds.add(files[i]);
			}
		}
	}

	public static void play(String url) {
		//nastavime text do JLabelu
		actual_sound.setText(url);
		running = 1;

		try {
			//pro prehravani pouzivame 
			AudioInputStream ais = AudioSystem.getAudioInputStream(new File(
					directory + "\\" + url));
			//zjistime format audia
			AudioFormat af = ais.getFormat();
			
			//zjistime, zda je podpora ze systemu
			DataLine.Info info = new DataLine.Info(SourceDataLine.class, af);
			if (!AudioSystem.isLineSupported(info)) {
				System.out.println("Neni podporovan");
				System.exit(0);
			}
			
			int frameRate = (int) af.getFrameRate();
			int frameSize = af.getFrameSize();
			int bufSize = frameRate * frameSize / 10;
			
			SourceDataLine line = (SourceDataLine) AudioSystem.getLine(info);
			line.open(af, bufSize);
			line.start();

			byte[] data = new byte[bufSize];
			int bytesRead;

			while ((bytesRead = ais.read(data, 0, data.length)) != -1 )
				line.write(data, 0, bytesRead);

			line.drain();
			line.stop();
			line.close();
		} catch (Exception e) {
			System.out.println(e.toString());
		}
		//prenastavime hodnotu na tlacitku
		play_stop_button.setText(" Přehrát ");
		running = 0;

	}

	public void run() {
		play(played);
	}

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