/*
 * 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.commons.imaging.common.bytesource;

import java.awt.Dimension;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.imaging.ImageFormat;
import org.apache.commons.imaging.ImageInfo;
import org.apache.commons.imaging.ImageReadException;
import org.apache.commons.imaging.Sanselan;
import org.apache.commons.imaging.util.Debug;
import org.apache.commons.imaging.util.IoUtils;

public class ByteSourceImageTest extends ByteSourceTest
{

    public void test() throws Exception
    {
        List imageFiles = getTestImages();
        for (int i = 0; i < imageFiles.size(); i++)
        {
            if (i % 1 == 0)
                Debug.purgeMemory();

            File imageFile = (File) imageFiles.get(i);
            Debug.debug("imageFile", imageFile);
            assertNotNull(imageFile);

            byte imageFileBytes[] = IoUtils.getFileBytes(imageFile);
            assertNotNull(imageFileBytes);
            assertTrue(imageFileBytes.length == imageFile.length());

            if (imageFile.getName().toLowerCase().endsWith(".ico")
                    || imageFile.getName().toLowerCase().endsWith(".tga")
                    || imageFile.getName().toLowerCase().endsWith(".jb2")
                    || imageFile.getName().toLowerCase().endsWith(".pcx")
                    || imageFile.getName().toLowerCase().endsWith(".dcx")
                    || imageFile.getName().toLowerCase().endsWith(".psd")
                    || imageFile.getName().toLowerCase().endsWith(".wbmp")
                    || imageFile.getName().toLowerCase().endsWith(".xbm")
                    || imageFile.getName().toLowerCase().endsWith(".xpm"))
            {
                // these formats can't be parsed without a filename hint.
                // they have ambiguous "magic number" signatures.
                continue;
            }

            checkGuessFormat(imageFile, imageFileBytes);

            if (imageFile.getName().toLowerCase().endsWith(".png")
                    && imageFile.getParentFile().getName().equalsIgnoreCase(
                            "pngsuite")
                    && imageFile.getName().toLowerCase().startsWith("x"))
                continue;

            checkGetICCProfileBytes(imageFile, imageFileBytes);

            if (!imageFile.getParentFile().getName().toLowerCase().equals(
                    "@broken"))
                checkGetImageInfo(imageFile, imageFileBytes);

            checkGetImageSize(imageFile, imageFileBytes);

            ImageFormat imageFormat = Sanselan.guessFormat(imageFile);
            if (ImageFormat.IMAGE_FORMAT_JPEG != imageFormat
             && ImageFormat.IMAGE_FORMAT_UNKNOWN != imageFormat)
            {
                checkGetBufferedImage(imageFile, imageFileBytes);
            }
        }
    }

    public void checkGetBufferedImage(File file, byte[] bytes) throws Exception
    {
        BufferedImage imageFile = Sanselan.getBufferedImage(file);
        assertNotNull(imageFile);
        assertTrue(imageFile.getWidth() > 0);
        assertTrue(imageFile.getHeight() > 0);
        int imageFileWidth = imageFile.getWidth();
        int imageFileHeight = imageFile.getHeight();
        imageFile = null;

        BufferedImage imageBytes = Sanselan.getBufferedImage(bytes);
        assertNotNull(imageBytes);
        assertTrue(imageFileWidth == imageBytes.getWidth());
        assertTrue(imageFileHeight == imageBytes.getHeight());
    }

    public void checkGetImageSize(File imageFile, byte[] imageFileBytes) throws Exception
    {
        Dimension imageSizeFile = Sanselan.getImageSize(imageFile);
        assertNotNull(imageSizeFile);
        assertTrue(imageSizeFile.width > 0);
        assertTrue(imageSizeFile.height > 0);

        Dimension imageSizeBytes = Sanselan.getImageSize(imageFileBytes);
        assertNotNull(imageSizeBytes);
        assertTrue(imageSizeFile.width == imageSizeBytes.width);
        assertTrue(imageSizeFile.height == imageSizeBytes.height);
    }

    public void checkGuessFormat(File imageFile, byte[] imageFileBytes) throws Exception
    {
        // check guessFormat()
        ImageFormat imageFormatFile = Sanselan.guessFormat(imageFile);
        assertNotNull(imageFormatFile);
        assertTrue(imageFormatFile != ImageFormat.IMAGE_FORMAT_UNKNOWN);
        // Debug.debug("imageFormatFile", imageFormatFile);

        ImageFormat imageFormatBytes = Sanselan.guessFormat(imageFileBytes);
        assertNotNull(imageFormatBytes);
        assertTrue(imageFormatBytes != ImageFormat.IMAGE_FORMAT_UNKNOWN);
        // Debug.debug("imageFormatBytes", imageFormatBytes);

        assertTrue(imageFormatBytes == imageFormatFile);
    }

    public void checkGetICCProfileBytes(File imageFile, byte[] imageFileBytes)  throws Exception
    {
        // check guessFormat()
        byte iccBytesFile[] = Sanselan.getICCProfileBytes(imageFile);

        byte iccBytesBytes[] = Sanselan.getICCProfileBytes(imageFileBytes);

        assertTrue((iccBytesFile != null) == (iccBytesBytes != null));

        if (iccBytesFile == null)
            return;

        compareByteArrays(iccBytesFile, iccBytesBytes);
    }

    public void checkGetImageInfo(File imageFile, byte[] imageFileBytes)
            throws IOException, ImageReadException, IllegalAccessException,
            IllegalArgumentException, InvocationTargetException
    {
        Map params = new HashMap();
        boolean ignoreImageData = isPhilHarveyTestImage(imageFile);
        ImageFormat imageFormat = Sanselan.guessFormat(imageFile);
        if (imageFormat.equals(ImageFormat.IMAGE_FORMAT_TIFF)
                || imageFormat.equals(ImageFormat.IMAGE_FORMAT_JPEG))
            params
                    .put(PARAM_KEY_READ_THUMBNAILS, new Boolean(
                            !ignoreImageData));

        ImageInfo imageInfoFile = Sanselan.getImageInfo(imageFile, params);

        ImageInfo imageInfoBytes = Sanselan
                .getImageInfo(imageFileBytes, params);

        assertNotNull(imageInfoFile);
        assertNotNull(imageInfoBytes);

        Method methods[] = ImageInfo.class.getMethods();
        for (int i = 0; i < methods.length; i++)
        {
            Method method = methods[i];
            method.getModifiers();
            if (!Modifier.isPublic(method.getModifiers()))
                continue;
            if (!method.getName().startsWith("get"))
                continue;
            if (method.getName().equals("getClass"))
                continue;
            // if (method.getGenericParameterTypes().length > 0)
            // continue;

            Object valueFile = method.invoke(imageInfoFile, null);
            Object valueBytes = method.invoke(imageInfoBytes, null);

            assertTrue(valueFile.equals(valueBytes));
        }

        // only have to test values from imageInfoFile; we already know values
        // match.
        assertTrue(imageInfoFile.getBitsPerPixel() > 0);

        assertNotNull(imageInfoFile.getFormat());
        assertTrue(imageInfoFile.getFormat() != ImageFormat.IMAGE_FORMAT_UNKNOWN);

        assertNotNull(imageInfoFile.getFormatName());

        assertTrue(imageInfoFile.getWidth() > 0);
        assertTrue(imageInfoFile.getHeight() > 0);

        assertNotNull(imageInfoFile.getMimeType());

        // TODO: not all adapters count images yet.
        // assertTrue(imageInfoFile.getNumberOfImages() > 0);

    }
}