/*
 * Copyright (c) 2012, Harald Kuhr
 * 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 "TwelveMonkeys" 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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 THE COPYRIGHT OWNER OR
 * CONTRIBUTORS 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 com.twelvemonkeys.imageio.plugins.jpeg;

import java.io.DataInput;
import java.io.IOException;
import java.util.Arrays;

/**
 * JFXXSegment
 *
 * @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
 * @author last modified by $Author: haraldk$
 * @version $Id: JFXXSegment.java,v 1.0 23.04.12 16:54 haraldk Exp$
 */
final class JFXX extends Application {
    public static final int JPEG = 0x10;
    public static final int INDEXED = 0x11;
    public static final int RGB  = 0x13;

    final int extensionCode;
    final byte[] thumbnail;

    private JFXX(final int extensionCode, final byte[] thumbnail, final byte[] data) {
        super(com.twelvemonkeys.imageio.metadata.jpeg.JPEG.APP0, "JFXX", data);

        this.extensionCode = extensionCode;
        this.thumbnail = thumbnail;
    }

    @Override
    public String toString() {
        return String.format("JFXX extension (%s thumb size: %d)", extensionAsString(), thumbnail.length);
    }

    private String extensionAsString() {
        switch (extensionCode) {
            case JPEG:
                return "JPEG";
            case INDEXED:
                return "Indexed";
            case RGB:
                return "RGB";
            default:
                return String.valueOf(extensionCode);
        }
    }

    public static JFXX read(final DataInput data, final int length) throws IOException {
        data.readFully(new byte[5]);

        byte[] bytes = new byte[length - 2 - 5];
        data.readFully(bytes);

        return new JFXX(
                bytes[0] & 0xff,
                bytes.length - 1 > 0 ? Arrays.copyOfRange(bytes, 1, bytes.length - 1) : null,
                bytes
        );
    }
}
