/*
 * MidiMesser - © 2003 Andrew R. Brown
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
 *
 * See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */


import jm.JMC;
import jm.music.data.*;
import jm.music.tools.*;
import jm.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;


public class MidiMesser implements JMC, ActionListener {
    private JButton loadBtn, saveBtn, processBtn, playBtn, stopBtn;
    private JComboBox processList;
    private JTextField modValue;
    private Score score;
    private JLabel units;
    static Thread pauseThread;
    
    public static void main(String[] args) {
        new MidiMesser();
    }
    
    public MidiMesser() {
        processList = new JComboBox();
        modValue = new JTextField("0.0", 3);
        score = new Score();
        units = new JLabel();
        makeGUI();
    }
    
    private void makeGUI() {
        JFrame window = new JFrame("MIDI Messer: by Andrew Brown");
        JPanel mainPanel = new JPanel(new BorderLayout());
        Box centerPanel = new Box(BoxLayout.X_AXIS);
        window.getContentPane().add(mainPanel);
        JPanel filePanel = new JPanel(new GridLayout(4,1));
        loadBtn = new JButton("Load MIDI file");
        loadBtn.addActionListener(this);
        filePanel.add(loadBtn);
        saveBtn = new JButton("Save MIDI file");
        saveBtn.addActionListener(this);
        saveBtn.setEnabled(false);
        filePanel.add(saveBtn);
        playBtn = new JButton("Play");
        playBtn.addActionListener(this);
        playBtn.setEnabled(false);
        filePanel.add(playBtn);
        stopBtn = new JButton("Stop");
        stopBtn.addActionListener(this);
        stopBtn.setEnabled(false);
        filePanel.add(stopBtn);
        centerPanel.add(filePanel);
        JPanel processPanel = new JPanel(new GridLayout(3,1));
        JLabel processLabel = new JLabel("Select Process");
        processLabel.setHorizontalAlignment(SwingConstants.CENTER);
        processPanel.add(processLabel);
        JPanel modPanel = new JPanel();
        processList.addActionListener(this);
        processList.setEnabled(false);
        processList.addItem("Add to rhythm value");
        processList.addItem("Multiply rhythm value");
        processList.addItem("Add to note duration");
        processList.addItem("Multiply note duration");
        processList.addItem("Multiply intervals");
        processList.addItem("Shuffle pitches");
        modPanel.add(processList);
        modValue.setEnabled(false);
        modPanel.add(modValue);
        units.setPreferredSize(new Dimension(65, 20));
        modPanel.add(units);
        processPanel.add(modPanel);
        processBtn = new JButton("Apply Process");
        processBtn.addActionListener(this);
        processBtn.setEnabled(false);
        processPanel.add(processBtn);
        centerPanel.add(processPanel);
        mainPanel.add(centerPanel, "Center");
        
        // padding
        mainPanel.add(new JPanel(), "North");
        JLabel advert = new JLabel("Made with jMusic");
        advert.setFont(new Font("Helvetica", Font.PLAIN, 9));
        advert.setHorizontalAlignment(SwingConstants.CENTER);
        mainPanel.add(advert, "South");
        mainPanel.add(new JPanel(), "East");
        mainPanel.add(new JPanel(), "West");
        
        // display
        window.pack();
        window.setResizable(false);
        window.setVisible(true);
    }
    
    public void actionPerformed(ActionEvent e) {
        if(e.getSource() == processList) {
            modValue.setEnabled(true);
            if (processList.getSelectedIndex() == 0) { // add rhythm
                modValue.setText("0.0");
                units.setText("beats");
            }
            if (processList.getSelectedIndex() == 1) { // multiply rhythm
                modValue.setText("1.0");
                units.setText("multiplier");
            }
            if (processList.getSelectedIndex() == 2) { // add duration
                modValue.setText("0.0");
                units.setText("beats");
            }
            if (processList.getSelectedIndex() == 3) { // multiply duration
                modValue.setText("1.0");
                units.setText("multiplier");
            }
            if (processList.getSelectedIndex() == 4) { // multiply intervals
                modValue.setText("1.0");
                units.setText("multiplier");
            }
            if (processList.getSelectedIndex() == 5) { // randomise pitch order
                modValue.setText("");
                modValue.setEnabled(false);
                units.setText("");
            }
        }
        if(e.getSource() == loadBtn) {
            readMidiFile();
            saveBtn.setEnabled(true);
            playBtn.setEnabled(true);
            processList.setEnabled(true);
            processBtn.setEnabled(true);
            modValue.setEnabled(true);
        }
        if(e.getSource() == saveBtn) writeMidiFile(); 
        if(e.getSource() == processBtn) processScore();
        if(e.getSource() == playBtn) playScore();
        if(e.getSource() == stopBtn) stopScore();        
    }
    
    private void readMidiFile() {
        Read.midi(score);
    }
    
    private void writeMidiFile() {
        Write.midi(score);
    }
    
    private void playScore() {
        stopBtn.setEnabled(true);
        playBtn.setEnabled(false);
        Play.midi(score, false);
        midiWait(score, this);
    }
    
    private void stopScore() {
        Play.stopMidi();
        stopBtn.setEnabled(false);
        playBtn.setEnabled(true);
    }
        
    private static void midiWait(final Score score, final MidiMesser app) {
        pauseThread = new Thread( new Runnable() {
            public void run() {
                try {
                    pauseThread.sleep((int)(score.getEndTime() * 60.0 /score.getTempo() * 1000.0 + 1000.0));
                } catch (Exception e) {System.out.println("Error in pause thread");}
                app.stopScore();
            }});
        pauseThread.start();
    }
    
    
    private void processScore() {
        String valString = modValue.getText();
        System.out.println("processing score... [" + processList.getSelectedIndex() + "]");
        if(valString.length() == 0 && processList.getSelectedIndex() != 5) return;
        if (processList.getSelectedIndex() == 0) { // add rhythm
            System.out.println("Add to length of note " + valString);
            Mod.addToLength(score, Double.parseDouble(valString));
        }
        if (processList.getSelectedIndex() == 1) { // multipy length
            System.out.println("Multiply note length by "+ valString);
            Mod.elongate(score, Double.parseDouble(valString));
        }
        if (processList.getSelectedIndex() == 2) { // add duration
            System.out.println("Add to duration " + valString);
            Mod.addToDuration(score, Double.parseDouble(valString));
        }
        if (processList.getSelectedIndex() == 3) { // multipy duration
            System.out.println("Multiply duration by "+ valString);
            Mod.increaseDuration(score, Double.parseDouble(valString));
        }
        if (processList.getSelectedIndex() == 4) { // multipy intervals
            System.out.println("Multiply each interval by "+ valString);
            Mod.expandIntervals(score, Double.parseDouble(valString));
        }
        if (processList.getSelectedIndex() == 5) { // shuffle pitches
            System.out.println("Randomising pitch order ");
            Mod.shuffle(score);
        }
    }
}