/**
 * Copyright 2003 Sun Microsystems, Inc.
 * 
 * See the file "license.terms" for information on usage and
 * redistribution of this file, and for a DISCLAIMER OF ALL 
 * WARRANTIES.
 */
import java.io.*;
import java.util.Locale;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.speech.Central;
import javax.speech.Engine;
import javax.speech.EngineException;
import javax.speech.synthesis.Synthesizer;
import javax.speech.synthesis.SynthesizerModeDesc;
import javax.speech.synthesis.SynthesizerProperties;
import javax.speech.synthesis.Voice;
import javax.speech.synthesis.Speakable;
import javax.speech.synthesis.SpeakableAdapter;
import javax.speech.synthesis.SpeakableEvent;

/**
 * Uses multiple voices to read a script, optionally leaving out one part
 * by lowering the volume so one has time to practice one's lines
 */


public class TheaterPractice {
    public static Synthesizer synthesizer = null;
    public static String name = null;
    public static String practicer = null;
    public static float savedVolume, savedPitch;
    public static String[][] performers = {
     {"NORMAN", "kevin16", "100"},
     {"MARTHA", "kevin16", "200"},
     {"JUNE", "mbrola_us1", "100"},
    };
    
    private final static void usage() {
	System.out.println("TheaterPractice");
    }

    /**
     * Returns a "no synthesizer" message, and asks 
     * the user to check if the "speech.properties" file is
     * at <code>user.home</code> or <code>java.home/lib</code>.
     *
     * @return a no synthesizer message
     */
    static private String noSynthesizerMessage(String synthesizer) {
        String message =
            "Cannot find " + synthesizer + ".\n" +
            "This may be the result of any number of problems.  It's\n" +
            "typically due to a missing \"speech.properties\" file that\n" +
            "should be at either of these locations: \n\n";
        message += "user.home    : " + System.getProperty("user.home") + "\n";
        message += "java.home/lib: " + System.getProperty("java.home") +
	    File.separator + "lib\n\n" +
            "Another cause of this problem might be corrupt or missing\n" +
            "voice jar files in the freetts lib directory.  This problem\n" +
            "also sometimes arises when the freetts.jar file is corrupt\n" +
            "or missing.  Sorry about that.  Please check for these\n" +
            "various conditions and then try again.\n";
        return message;
    }

    public static void speak(String name, String lines) throws Exception {
        int i, colon;
        float pitch, volume;
        Voice voice;
        if (savedVolume == 0) { // save default pitch and volume
            savedVolume = synthesizer.getSynthesizerProperties().getVolume();
            savedPitch = synthesizer.getSynthesizerProperties().getPitch();
        }
        pitch = savedPitch; volume = savedVolume;
        for (i = 0; i < performers.length; i++) {
            if (performers[i][0].equals(name)) {
	        voice = new Voice(performers[i][1], 
	            Voice.GENDER_DONT_CARE, Voice.AGE_DONT_CARE, null);
                pitch = Integer.parseInt(performers[i][2]);
                if (name.equals(practicer)) volume = 0.5f;
	        synthesizer.getSynthesizerProperties().setVoice(voice);
	        synthesizer.getSynthesizerProperties().setPitch(pitch);
	        synthesizer.getSynthesizerProperties().setVolume(volume);
            }
        }
        if (name != null && lines.length() > 0) {
            synthesizer.waitEngineState(Synthesizer.ALLOCATED);
            synthesizer.resume();
            synthesizer.speakPlainText(lines, null);
            synthesizer.waitEngineState(Synthesizer.QUEUE_EMPTY);
            synthesizer.getSynthesizerProperties().setPitch(savedPitch);
            synthesizer.getSynthesizerProperties().setVolume(savedVolume);
        }
    }

    public static void main(String[] argv) throws Exception {
        String line, lines;
        int i, colon;
        Voice voice;
	System.out.println(" ** Theater Practice **");

	try {
	    SynthesizerModeDesc generalDesc = new SynthesizerModeDesc(
		null,          // engine name
                "general",     // mode name
                Locale.US,     // locale
                null,          // running
                null);         // voice
            
	    synthesizer = Central.createSynthesizer(generalDesc);

	    if (synthesizer == null) {
		System.err.println(
                    noSynthesizerMessage("general domain synthesizer"));
		System.exit(1);
	    }

	    System.out.print("  Allocating synthesizers...");
	    synthesizer.allocate();

	    /* get general domain synthesizer ready to speak
             */

	    System.out.println("And here we go!");
	    synthesizer.resume();
	    
            BufferedReader script = new BufferedReader(
                new FileReader(argv[0]));
            if (argv.length > 1) {
                 practicer = argv[1];
            }
            lines = "";
            while ((line = script.readLine()) != null) {
                // make sure a blank line follows last line of script
                colon = line.indexOf(":");
                if (colon > 0 && colon < line.indexOf(" ")) {
                    name = line.substring(0, colon);
                    System.err.print(name + ": ");
                    lines = line.substring(colon + 1).trim() + " ";
                } else if (line.equals("")) {
                    System.out.println(lines);
                    speak(name, lines);
                    name = null;
                    lines = "";
                } else { // otherwise, just add to current dialogue
                    lines += line.trim() + " ";
                }
            }

	    // clean up
	    synthesizer.deallocate();
	} catch (Exception e) {
	    e.printStackTrace();
	}

	System.exit(0);
    }
}