import javax.sound.midi.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
//import java.util.*;

public class Midi2 extends JFrame{
	
	File CDir;
	String oldFile;
	JComboBox midiChoice;
	JButton playButton, infoButton;
	JTextArea textarea;
	Sequencer sequencer;
	Sequence sequence;
	
	
	public Midi2(){
		
		playButton = new JButton ("PLAY");
		playButton.addActionListener(new ActionListener(){
				public void actionPerformed(ActionEvent e){
					if(e.getActionCommand().equals("PLAY")){
						startPlay();
						playButton.setText("STOP");	
					}else{
						stopPlay();
						playButton.setText("PLAY");	
					}
				}
		});
		
		infoButton = new JButton("INFO");
		infoButton.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				if(e.getActionCommand().equals("INFO")){
					// siia tuleb info tekstiväljale midifaili kohta
					midiInfo();	
				}	
			}	
		});
		
		CDir = new File(System.getProperty("user.dir"));
		FilenameFilter filter = new FilenameFilter(){
			public boolean accept(File directory, String filename){
				String name = filename.toLowerCase();
				return name.endsWith(".mid");	
			}	
		};
		
		
		String midiFiles[] = CDir.list(filter);
		if(midiFiles == null || midiFiles.length == 0){
			System.out.println("Ei leia faile");
			System.exit(1);
		}try{
			sequencer = MidiSystem.getSequencer();
			sequencer.open();	
		}catch(MidiUnavailableException e){
			System.out.println("Midi systemi viga");	
			System.exit(1);
		}
		
		
		midiChoice = new JComboBox(midiFiles);
		midiChoice.setSelectedIndex(0);
		newSequence(midiFiles[0]);
		oldFile = midiFiles[0];
		midiChoice.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				newSequence((String)midiChoice.getSelectedItem());
			}
		});
		
		
		JToolBar toolBar = new JToolBar(JToolBar.HORIZONTAL);
		GridLayout gl = new GridLayout(2,1);
		JPanel panel1 = new JPanel(gl);
		JPanel panel2 = new JPanel(gl);
		Label label = new Label("Midi List:");
		panel1.add(label);
		panel1.add(midiChoice);
		panel2.add(playButton);
		panel2.add(infoButton);
		
		JPanel panel3=new JPanel();
		panel3.setLayout(new BorderLayout());
		textarea = new JTextArea(300, 500);
		//textarea.setScrollbar(new JScrollBar());
		textarea.setFont(new Font("Arial", Font.PLAIN, 10));
   		textarea.setLineWrap(true);
		textarea.setWrapStyleWord(true);
		JScrollPane areaScrollPanel=new JScrollPane(textarea);
		areaScrollPanel.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
		areaScrollPanel.setPreferredSize(new Dimension(600, 400));
		panel3.add(areaScrollPanel);
		
		/*JEditorPane textarea = new JEditorPane();
        JScrollPane editorScrollPane = new JScrollPane(textarea);
        editorScrollPane.setVerticalScrollBarPolicy(
                        JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        editorScrollPane.setPreferredSize(new Dimension(300, 500));
        //editorScrollPane.setMinimumSize(new Dimension(10, 10));*/

		
		Container content = getContentPane();
		content.add(toolBar, BorderLayout.NORTH);
		content.add(panel3, BorderLayout.CENTER);
		toolBar.add(panel1);
		toolBar.addSeparator();
		toolBar.add(panel2);
		setVisible(true);
		
	}
	
	
	void newSequence(String filename){
		File midiFile = new File(CDir, filename);
		try{
			sequence = MidiSystem.getSequence(midiFile);
			sequencer.setSequence(sequence);
			playButton.setText("PLAY");
			oldFile = filename;
		}
		catch(InvalidMidiDataException e){
			System.out.println("Vale data");
			midiChoice.setSelectedItem(oldFile);
		}
		catch(IOException e){
			System.out.println("Ei moodusta sequenci");	
			midiChoice.setSelectedItem(oldFile);
		}	
	}
	
	
	void startPlay(){
		sequencer.start();	
	}
	
	void stopPlay(){
		sequencer.stop();	
	}
	
	void midiInfo(){
		System.out.println("1");		
		
		textarea.append("Info ALGUS...................");
		System.out.println("info");		
    	textarea.append(sequence.getDivisionType()+" pikkus: "+sequence.getMicrosecondLength()/1000000.0+
                   " sekundit, "+sequence.getTickLength()+" tiksu");
    	Track[] rajad=sequence.getTracks();
    	textarea.append(rajad.length+" rada");
    	for(int nr=0; nr<rajad.length; nr++){
      		textarea.append("Rada "+nr);
      		for(int t=0; t<rajad[nr].size(); t++){
        		MidiEvent me=rajad[nr].get(t);
        		long tiks=me.getTick();
        		MidiMessage teade=me.getMessage();
        		if(teade instanceof ShortMessage){
          			ShortMessage sm=(ShortMessage)teade;
          			textarea.append(tiks+" ShortMessage "+
            			"kanal: "+sm.getChannel()+
            			" teade: "+sm.getCommand()+  //näiteks noteOff
            			" bait1: "+sm.getData1()+    //kõrgus
            			" bait2: "+sm.getData2()     //valjus
          			);
        		}
        		if(teade instanceof MetaMessage){
          			MetaMessage mm=(MetaMessage)teade;
          			textarea.append(tiks+" MetaMessage"+
           				" tyyp: "+mm.getType());
          			byte[] b=mm.getData();
          			for(int i=0; i<b.length; i++)textarea.insert((String)(" "+b[i]), 5);
        		}
      		}
    	}	
	}

	public static void main(String args[]) {
		System.out.println("Starting Midiplay...");
        JFrame.setDefaultLookAndFeelDecorated(true);
		Midi2 mainFrame = new Midi2();
		mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		mainFrame.setSize(500, 500);
		mainFrame.setTitle("Midi");
		mainFrame.setVisible(true);
	}
	
}