/*
    * 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.nio.ByteOrder;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.commons.imaging.ImagingException;
  import org.apache.commons.imaging.formats.tiff.fieldtypes.AbstractFieldType;
  
  final class TiffOutputSummary {
      private static final class OffsetItem {
          public final AbstractTiffOutputItem item;
          public final TiffOutputField itemOffsetField;
  
          OffsetItem(final AbstractTiffOutputItem item, final TiffOutputField itemOffsetField) {
              this.itemOffsetField = itemOffsetField;
              this.item = item;
          }
      }
  
      public final ByteOrder byteOrder;
      public final TiffOutputDirectory rootDirectory;
      public final Map<Integer, TiffOutputDirectory> directoryTypeMap;
      private final List<OffsetItem> offsetItems = new ArrayList<>();
  
      private final List<ImageDataOffsets> imageDataItems = new ArrayList<>();
  
      TiffOutputSummary(final ByteOrder byteOrder, final TiffOutputDirectory rootDirectory, final Map<Integer, TiffOutputDirectory> directoryTypeMap) {
          this.byteOrder = byteOrder;
          this.rootDirectory = rootDirectory;
          this.directoryTypeMap = directoryTypeMap;
      }
  
      public void add(final AbstractTiffOutputItem item, final TiffOutputField itemOffsetField) {
          offsetItems.add(new OffsetItem(item, itemOffsetField));
      }
  
      public void addTiffImageData(final ImageDataOffsets imageDataInfo) {
          imageDataItems.add(imageDataInfo);
      }
  
      public void updateOffsets(final ByteOrder byteOrder) throws ImagingException {
          for (final OffsetItem offset : offsetItems) {
              final byte[] value = AbstractFieldType.LONG.writeData((int) offset.item.getOffset(), byteOrder);
              offset.itemOffsetField.setData(value);
          }
  
          for (final ImageDataOffsets imageDataInfo : imageDataItems) {
              for (int j = 0; j < imageDataInfo.outputItems.length; j++) {
                  final AbstractTiffOutputItem item = imageDataInfo.outputItems[j];
                  imageDataInfo.imageDataOffsets[j] = (int) item.getOffset();
              }
  
              imageDataInfo.imageDataOffsetsField.setData(AbstractFieldType.LONG.writeData(imageDataInfo.imageDataOffsets, byteOrder));
          }
      }
  
  }