/*
 * Copyright (c) 2008, Michael Stringer
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Growl nor the names of its contributors may be
 *       used to endorse or promote products derived from this software
 *       without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY <copyright holder> ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL <copyright holder> BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package info.growl;

import javax.imageio.ImageIO;
import java.awt.image.RenderedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

/**
 * Growl notification implementation. This uses JNI to send messages to Growl.
 *
 * @author Michael Stringer
 * @version 0.1
 */
class GrowlNative implements Growl {
    private final String appName;
    private final List<NotificationType> notifications;
    private final List<GrowlCallbackListener> callbackListeners;
    private byte[] imageData;

    private native void sendNotification(String appName, String name,
                                         String title, String message, String callbackContext, byte[] icon);

    private native void registerApp(String appName, byte[] image,
                                    List<NotificationType> notifications);

    /**
     * Creates a new <code>GrowlNative</code> instance for the specified
     * application name.
     *
     * @param appName The name of the application sending notifications.
     */
    GrowlNative(String appName) {
        notifications = new ArrayList<NotificationType>();
        callbackListeners = new ArrayList<GrowlCallbackListener>();
        this.appName = appName;
    }

    @SuppressWarnings({"UnusedDeclaration"})
    void fireCallbacks(String callbackContext) {
        for (GrowlCallbackListener listener : callbackListeners) {
            listener.notificationWasClicked(callbackContext);
        }
    }

    /**
     * {@inheritDoc}
     */
    public void register() throws GrowlException {
        registerApp(appName, imageData, notifications);
    }

    /**
     * {@inheritDoc}
     */
    public void addNotification(String name, boolean enabledByDefault) {
        notifications.add(new NotificationType(name, enabledByDefault));
    }

    /**
     * {@inheritDoc}
     */
    public void addCallbackListener(GrowlCallbackListener listener) {
        callbackListeners.add(listener);
    }

    /**
     * {@inheritDoc}
     */
    public void setIcon(RenderedImage icon) throws GrowlException {
        imageData = convertImage(icon);
    }

    protected byte[] convertImage(RenderedImage icon) throws GrowlException {
        if (icon == null) {
            return null;
        }
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        try {
            ImageIO.write(icon, "png", baos);
        } catch (IOException ioe) {
            throw new GrowlException("Failed to convert Image", ioe);
        }
        return baos.toByteArray();
    }

    /**
     * {@inheritDoc}
     */
    public void sendNotification(String name, String title, String body)
            throws GrowlException {
        sendNotification(name, title, body, null, null);
    }

    /**
     * {@inheritDoc}
     */
    public void sendNotification(String name, String title, String body, RenderedImage icon) throws GrowlException {
        sendNotification(name, title, body, null, icon);
    }

    /**
     * {@inheritDoc}
     */
    public void sendNotification(String name, String title, String body, String callbackContext) throws GrowlException {
        sendNotification(name, title, body, callbackContext, null);
    }

    /**
     * {@inheritDoc}
     */
    public void sendNotification(String name, String title, String body, String callbackContext, RenderedImage icon)
            throws GrowlException {
        if (!notifications.contains(new NotificationType(name, false))) {
            throw new GrowlException("Unregistered notification name [" + name + ']');
        }

        sendNotification(appName, name, title, body, callbackContext, convertImage(icon));
    }

    private static class NotificationType {
        private final String name;
        private final boolean enabledByDefault;

        private NotificationType(String name, boolean enabledByDefault) {
            this.name = name;
            this.enabledByDefault = enabledByDefault;
        }

        @SuppressWarnings({"UnusedDeclaration"})
        public String getName() {
            return name;
        }

        @SuppressWarnings({"UnusedDeclaration"})
        public boolean isEnabledByDefault() {
            return enabledByDefault;
        }

        @Override
        public boolean equals(Object other) {
            return (other instanceof NotificationType) &&
                    name.equals(((NotificationType) other).name);
        }

        @Override
        public int hashCode() {
            return name.hashCode();
        }
    }
}