import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

import javax.sound.midi.*;
import java.util.*;
import java.io.*;
import java.net.*;

public class BeatBox {

    JPanel mainPanel;
    JList incomingList;
    JTextField userMessage;
    ArrayList checkboxList;
    int nextNum;
    ObjectInputStream in;
    ObjectOutputStream out;
    Vector listVector = new Vector();
    String userName ;
    HashMap otherSeqsMap = new HashMap();
    Sequencer sequencer;
    Sequence sequence;
    Sequence mySequence = null;
    Track track;
    JFrame theFrame;

    String[] instrumentNames = {"Bass Drum", "Closed Hi-Bat",
        "Open Hi-Hat", "Acoustic Snare", "Crash Cymbal", "Hand Clap",
        "High Tom", "Hi Bongo", "Maracas", "Whistle", "Low Conga",
        "Cowbell", "Vibraslap", "Low-mid Tom", "High Aqoqo",
        "0pen Hi Conga"};
    int[] instruments = {35,42,46,38,49,39,50,60,70,72,64,56,59,47,67,63};

    public static void main(String[] args) {
        new BeatBox().startUp(args[0]);
    }

    public void startUp(String name) {
        userName = name;
        try {
            Socket sock = new Socket("127.0.0.1", 4242);
            out = new ObjectOutputStream(sock.getOutputStream());
            in = new ObjectInputStream(sock.getInputStream());
            Thread remote = new Thread(new RemoteReader());
            remote.start();
        } catch (Exception ex) {
            System.out.println("Couldn't connect - you'll have to play alone.");
        }
        setUpMidi();
        buildGUI();
    }

    public void buildGUI() {
        theFrame = new JFrame("Cyber BeatBox");
        theFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        BorderLayout layout = new BorderLayout();
        JPanel background = new JPanel(layout);
        background.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));

        checkboxList = new ArrayList();
        Box buttonBox = new Box(BoxLayout.Y_AXIS);

        JButton start = new JButton("Start");
        start.addActionListener(new MyStartListener());
        buttonBox.add(start);

        JButton stop = new JButton("Stop");
        stop.addActionListener(new MyStopListener());
        buttonBox.add(stop);

        JButton upTempo = new JButton("Tempo Up");
        upTempo.addActionListener(new MyUpTempoListener());
        buttonBox.add(upTempo);

        JButton downTempo = new JButton("Tempo Down");
        downTempo.addActionListener(new MyDownTempoListener());
        buttonBox.add(downTempo);

        JButton serializeIt = new JButton("Save It"); // ...into a file
        serializeIt.addActionListener(new MySaveListener());
        buttonBox.add(serializeIt);

        JButton restoreIt = new JButton("Restore"); // ...from a file
        restoreIt.addActionListener(new MyReadInListener());
        buttonBox.add(restoreIt);

        JButton sendIt = new JButton("Send It"); // ...to the net
        sendIt.addActionListener(new MySendListener());
        buttonBox.add(sendIt);

        userMessage = new JTextField();
        buttonBox.add(userMessage);

        incomingList = new JList();
        incomingList.addListSelectionListener(new MyListSelectionListener());
        incomingList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        JScrollPane theList = new JScrollPane(incomingList);
        buttonBox.add(theList);
        incomingList.setListData(listVector);

        Box nameBox = new Box(BoxLayout.Y_AXIS) ;
        for (int i =0; i < 16; i++) {
            nameBox.add(new Label(instrumentNames[i]));
        }

        background.add(BorderLayout.EAST, buttonBox) ;
        background.add(BorderLayout.WEST, nameBox);

        theFrame.getContentPane().add(background);

        GridLayout grid = new GridLayout(16, 16);
        grid.setVgap(1);
        grid.setHgap(2);
        mainPanel = new JPanel(grid);
        background.add(BorderLayout.CENTER, mainPanel);

        for (int i = 0; i < 256; i++) {
            JCheckBox c = new JCheckBox();
            c.setSelected(false);
            checkboxList.add(c);
            mainPanel.add(c);
        }

        theFrame.setBounds(50, 50, 300, 300);
        theFrame.pack();
        theFrame.setVisible(true);
    }

    public void setUpMidi() {
        try {
            sequencer = MidiSystem.getSequencer();
            sequencer.open();
            sequence = new Sequence(Sequence.PPQ, 4);
            track = sequence.createTrack();            
            sequencer.setTempoInBPM(120);
        } catch(Exception e) { e.printStackTrace(); }
    }

    public void buildTrackAndStart() {

        // this will hold the instruments for each vertical column,
        // in other words, each tick (may have multiple instruments)
        ArrayList trackList = null;

        sequence.deleteTrack(track);
        track = sequence.createTrack();

        for (int i = 0; i < 16; i++) {
            trackList = new ArrayList();
            for (int j = 0; j < 16; j++) {
                JCheckBox jc = (JCheckBox) checkboxList.get(j + (16*i));
                if (jc.isSelected()) {
                    int key = instruments[i];
                    trackList.add(key);
                } else {
                    trackList.add(null);
                }
            }
            makeTracks(trackList);
        }
        track.add(makeEvent(192, 9, 1, 0, 15)); // so we always go to full 16 beats
        try {
            sequencer.setSequence(sequence);
            sequencer.setLoopCount(sequencer.LOOP_CONTINUOUSLY);
            sequencer.start();
            sequencer.setTempoInBPM(120);
        } catch(Exception e) { e.printStackTrace(); }
    }

    public class MyStartListener implements ActionListener {
        public void actionPerformed(ActionEvent a) {
            buildTrackAndStart();
        }
    }

    public class MyStopListener implements ActionListener {
        public void actionPerformed(ActionEvent a) {
            sequencer.stop();
        }
    }

    public class MyUpTempoListener implements ActionListener {
        public void actionPerformed(ActionEvent a) {
            float tempoFactor = sequencer.getTempoFactor();
            sequencer.setTempoFactor((float)(tempoFactor * 1.03));
        }
    }

    public class MyDownTempoListener implements ActionListener {
        public void actionPerformed(ActionEvent a) {
            float tempoFactor = sequencer.getTempoFactor();
            sequencer.setTempoFactor((float)(tempoFactor * 0.97));
        }
    }

    public void changeSequence(boolean[] checkboxState) {
        for (int i = 0; i < 256; i++) {
            JCheckBox check = (JCheckBox) checkboxList.get(i);
            if (checkboxState[i]) {
                check.setSelected(true);
            } else {
                check.setSelected(false);
            }
        }
    }

    // This makes events for one instument at a time for all 16 beats
    public void makeTracks(ArrayList list) {
        Iterator it = list.iterator();
        for (int i = 0; i < 16; i++) {
            Integer num = (Integer) it.next();
            if (num != null) {
                int numKey = num.intValue();
                track.add(makeEvent(144, 9, numKey, 100, i));
                track.add(makeEvent(128, 9, numKey, 100, i + 1));
            }
        }
    }

    public static MidiEvent makeEvent(int comd, int chan, int one, int two, int tick) {
        MidiEvent event = null;
        try {
            ShortMessage a = new ShortMessage();
            a.setMessage(comd, chan, one, two);
            event = new MidiEvent(a, tick);
        } catch(Exception e) { e.printStackTrace(); }
        return event;
    }
    
    public class MySaveListener implements ActionListener {
        public void actionPerformed(ActionEvent a) {
            JFileChooser save = new JFileChooser();
            save.setFileSelectionMode(JFileChooser.FILES_ONLY);
            save.addChoosableFileFilter(new FileNameExtensionFilter("Saved beats (*.sbb)", "sbb"));
            int result = save.showSaveDialog(theFrame);
            if (result == JFileChooser.APPROVE_OPTION) {
                boolean[] checkboxState = new boolean[256];
                for (int i = 0; i < 256; i++) {
                    JCheckBox check = (JCheckBox) checkboxList.get(i);
                    if (check.isSelected()) {
                        checkboxState[i] = true;
                    }
                }
                try {
                    FileOutputStream fileStream = new FileOutputStream(new File(save.getSelectedFile().getPath() + (save.getSelectedFile().getPath().endsWith(".sbb")?"":".sbb")));
                    ObjectOutputStream os = new ObjectOutputStream(fileStream);
                    os.writeObject(checkboxState);
                } catch(Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public class MyReadInListener implements ActionListener {
        public void actionPerformed(ActionEvent a) {
            JFileChooser open = new JFileChooser();
            open.setFileSelectionMode(JFileChooser.FILES_ONLY);
            open.addChoosableFileFilter(new FileNameExtensionFilter("Saved beats (*.sbb)", "sbb"));
            int result = open.showOpenDialog(theFrame);
            if (result == JFileChooser.APPROVE_OPTION) {
                boolean[] checkboxState = null;
                try {
                    FileInputStream fileIn = new FileInputStream(new File(open.getSelectedFile().getPath()));
                    ObjectInputStream is = new ObjectInputStream(fileIn);
                    checkboxState = (boolean[]) is.readObject();
                } catch(Exception e) {
                    e.printStackTrace();
                }
                for (int i = 0; i < 256; i++) {
                    JCheckBox check = (JCheckBox) checkboxList.get(i);
                    if (checkboxState[i]) {
                        check.setSelected(true);
                    } else {
                        check.setSelected(false);
                    }
                }
                sequencer.stop();
                buildTrackAndStart();
            }
        }
    }

    public class MySendListener implements ActionListener {
        public void actionPerformed(ActionEvent a) {
            
            // make an arraylist of just the STATE of the checkboxes
            boolean[] checkboxState = new boolean[256];
            
            for (int i = 0; i < 256; i++) {
                JCheckBox check = (JCheckBox) checkboxList.get(i);
                if (check.isSelected()) {
                    checkboxState[i] = true;
                }
            }

            try {
                out.writeObject(userName + nextNum++ + ": " + userMessage.getText());
                out.writeObject(checkboxState);
            } catch(Exception ex) {
                ex.printStackTrace();
                System.out.println("Sorry... Couldn't send it to the server.");
            }
        }
    }

    public class MyListSelectionListener implements ListSelectionListener {
        public void valueChanged(ListSelectionEvent le) {
            if (!le.getValueIsAdjusting()) {
                String selected = (String) incomingList.getSelectedValue();
                if (selected != null) {
                    boolean[] selectedState = (boolean[]) otherSeqsMap.get(selected);
                    changeSequence(selectedState);
                    sequencer.stop();
                    buildTrackAndStart();
                }
            }
        }
    }

    public class RemoteReader implements Runnable {
        boolean[] checkboxState = null;
        String nameToShow = null;
        Object obj = null;

        public void run() {
            try {
                while ((obj=in.readObject()) != null) {
                    System.out.println("got an object from server");
                    System.out.println(obj.getClass());
                    String nameToShow = (String) obj;
                    checkboxState = (boolean[]) in.readObject();
                    otherSeqsMap.put(nameToShow, checkboxState);
                    listVector.add(nameToShow);
                    incomingList.setListData(listVector);
                }
            } catch (Exception e) { e.printStackTrace(); }
        }
    }
}