/*
 * 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.formats.tiff.write;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.commons.imaging.ImageWriteException;
import org.apache.commons.imaging.formats.tiff.constants.TiffConstants;

class TiffOutputSummary implements TiffConstants
{
    public final int byteOrder;
    public final TiffOutputDirectory rootDirectory;
    public final Map<Integer, TiffOutputDirectory> directoryTypeMap;

    public TiffOutputSummary(final int byteOrder,
            final TiffOutputDirectory rootDirectory, final Map<Integer, TiffOutputDirectory> directoryTypeMap)
    {
        this.byteOrder = byteOrder;
        this.rootDirectory = rootDirectory;
        this.directoryTypeMap = directoryTypeMap;
    }

    private static class OffsetItem
    {
        public final TiffOutputItem item;
        public final TiffOutputField itemOffsetField;

        public OffsetItem(final TiffOutputItem item,
                final TiffOutputField itemOffsetField)
        {
            super();
            this.itemOffsetField = itemOffsetField;
            this.item = item;
        }
    }

    private List<OffsetItem> offsetItems = new ArrayList<OffsetItem>();

    public void add(final TiffOutputItem item,
            final TiffOutputField itemOffsetField)
    {
        offsetItems.add(new OffsetItem(item, itemOffsetField));
    }

    public void updateOffsets(int byteOrder) throws ImageWriteException
    {
        for (int i = 0; i < offsetItems.size(); i++)
        {
            OffsetItem offset = offsetItems.get(i);

            byte value[] = FIELD_TYPE_LONG.writeData(new int[]{
                offset.item.getOffset(),
            }, byteOrder);
            offset.itemOffsetField.setData(value);
        }

        for (int i = 0; i < imageDataItems.size(); i++)
        {
            ImageDataOffsets imageDataInfo = imageDataItems
                    .get(i);

            for (int j = 0; j < imageDataInfo.outputItems.length; j++)
            {
                TiffOutputItem item = imageDataInfo.outputItems[j];
                imageDataInfo.imageDataOffsets[j] = item.getOffset();
            }

            imageDataInfo.imageDataOffsetsField.setData(FIELD_TYPE_LONG
                    .writeData(imageDataInfo.imageDataOffsets, byteOrder));
        }
    }

    private List<ImageDataOffsets> imageDataItems = new ArrayList<ImageDataOffsets>();

    public void addTiffImageData(final ImageDataOffsets imageDataInfo)
    {
        imageDataItems.add(imageDataInfo);
    }

}