/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

package org.apache.tools.ant.taskdefs.optional.sound;

// ant includes
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.Line;
import javax.sound.sampled.LineEvent;
import javax.sound.sampled.LineListener;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;
import org.apache.tools.ant.BuildEvent;
import org.apache.tools.ant.BuildListener;
import org.apache.tools.ant.Project;



/**
 * This class is designed to be used by any AntTask that requires audio output.
 *
 * It implements the BuildListener interface to listen for BuildEvents
 * and could be easily extended to provide audio output upon any
 * specific build events occurring.
 *
 * I have only tested this with .WAV and .AIFF sound file formats. Both seem to work fine.
 *
 */

public class AntSoundPlayer implements LineListener, BuildListener {

    private File fileSuccess = null;
    private int loopsSuccess = 0;
    private Long durationSuccess = null;

    private File fileFail = null;
    private int loopsFail = 0;
    private Long durationFail = null;

    /** Constructor for AntSoundPlayer. */
    public AntSoundPlayer() {
    }

    /**
     * @param file the location of the audio file to be played when the
     *        build is successful
     * @param loops the number of times the file should be played when
     *        the build is successful
     * @param duration the number of milliseconds the file should be
     *        played when the build is successful
     */
    public void addBuildSuccessfulSound(File file, int loops, Long duration) {
        this.fileSuccess = file;
        this.loopsSuccess = loops;
        this.durationSuccess = duration;
    }


    /**
     * @param fileFail the location of the audio file to be played
     *        when the build fails
     * @param loopsFail the number of times the file should be played
     *        when the build is fails
     * @param durationFail the number of milliseconds the file should be
     *        played when the build fails
     */
    public void addBuildFailedSound(File fileFail, int loopsFail, Long durationFail) {
        this.fileFail = fileFail;
        this.loopsFail = loopsFail;
        this.durationFail = durationFail;
    }

    /**
     * Plays the file for duration milliseconds or loops.
     */
    private void play(Project project, File file, int loops, Long duration) {

        Clip audioClip = null;

        AudioInputStream audioInputStream = null;


        try {
            audioInputStream = AudioSystem.getAudioInputStream(file);
        } catch (UnsupportedAudioFileException uafe) {
            project.log("Audio format is not yet supported: "
                + uafe.getMessage());
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }

        if (audioInputStream != null) {
            AudioFormat format = audioInputStream.getFormat();
            DataLine.Info   info = new DataLine.Info(Clip.class, format,
                                             AudioSystem.NOT_SPECIFIED);
            try {
                audioClip = (Clip) AudioSystem.getLine(info);
                audioClip.addLineListener(this);
                audioClip.open(audioInputStream);
            } catch (LineUnavailableException e) {
                project.log("The sound device is currently unavailable");
                return;
            } catch (IOException e) {
                e.printStackTrace();
            }

            if (duration != null) {
                playClip(audioClip, duration.longValue());
            } else {
                playClip(audioClip, loops);
            }
            audioClip.drain();
            audioClip.close();
        } else {
            project.log("Can't get data from file " + file.getName());
        }
    }

    private void playClip(Clip clip, int loops) {

        clip.loop(loops);
        do {
            try {
                long timeLeft =
                    (clip.getMicrosecondLength() - clip.getMicrosecondPosition())
                    / 1000;
                if (timeLeft > 0) {
                    Thread.sleep(timeLeft);
                }
            } catch (InterruptedException e) {
                break;
            }
        } while (clip.isRunning());

        if (clip.isRunning()) {
            clip.stop();
        }
    }

    private void playClip(Clip clip, long duration) {
        clip.loop(Clip.LOOP_CONTINUOUSLY);
        try {
            Thread.sleep(duration);
        } catch (InterruptedException e) {
            // Ignore Exception
        }
        clip.stop();
    }

    /**
     * This is implemented to listen for any line events and closes the
     * clip if required.
     * @param event the line event to follow
     */
    public void update(LineEvent event) {
        if (event.getType().equals(LineEvent.Type.STOP)) {
            Line line = event.getLine();
            line.close();
        }
    }


    /**
     *  Fired before any targets are started.
     * @param event ignored
     */
    public void buildStarted(BuildEvent event) {
    }

    /**
     *  Fired after the last target has finished. This event
     *  will still be thrown if an error occurred during the build.
     * @param event the build finished event.
     *  @see BuildEvent#getException()
     */
    public void buildFinished(BuildEvent event) {
        if (event.getException() == null && fileSuccess != null) {
            // build successfull!
            play(event.getProject(), fileSuccess, loopsSuccess, durationSuccess);
        } else if (event.getException() != null && fileFail != null) {
            play(event.getProject(), fileFail, loopsFail, durationFail);
        }
    }

    /**
     *  Fired when a target is started.
     * @param event ignored.
     *  @see BuildEvent#getTarget()
     */
    public void targetStarted(BuildEvent event) {
    }

    /**
     *  Fired when a target has finished. This event will
     *  still be thrown if an error occurred during the build.
     * @param event ignored.
     *  @see BuildEvent#getException()
     */
    public void targetFinished(BuildEvent event) {
    }

    /**
     *  Fired when a task is started.
     * @param event ignored.
     *  @see BuildEvent#getTask()
     */
    public void taskStarted(BuildEvent event) {
    }

    /**
     *  Fired when a task has finished. This event will still
     *  be throw if an error occurred during the build.
     * @param event ignored.
     *  @see BuildEvent#getException()
     */
    public void taskFinished(BuildEvent event) {
    }

    /**
     *  Fired whenever a message is logged.
     *  @param event the build event
     *  @see BuildEvent#getMessage()
     *  @see BuildEvent#getPriority()
     */
    public void messageLogged(BuildEvent event) {
    }
}

