content: /*
   *  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.causeway.core.metamodel.valuesemantics;
  
  import java.awt.image.BufferedImage;
  import java.util.Optional;
  
  import jakarta.annotation.Priority;
  import jakarta.inject.Named;
  
  import org.jspecify.annotations.Nullable;
  import org.springframework.stereotype.Component;
  
  import org.apache.causeway.applib.annotation.PriorityPrecedence;
  import org.apache.causeway.applib.value.Blob;
  import org.apache.causeway.applib.value.NamedWithMimeType.CommonMimeType;
  import org.apache.causeway.applib.value.semantics.OrderRelation;
  import org.apache.causeway.applib.value.semantics.ValueDecomposition;
  import org.apache.causeway.applib.value.semantics.ValueSemanticsAbstract;
  import org.apache.causeway.commons.collections.Can;
  import org.apache.causeway.commons.internal.image._Images;
  import org.apache.causeway.core.metamodel.object.ManagedObject;
  import org.apache.causeway.core.metamodel.object.ManagedObjects;
  import org.apache.causeway.schema.common.v2.BlobDto;
  import org.apache.causeway.schema.common.v2.ValueType;
  import org.apache.causeway.schema.common.v2.ValueWithTypeDto;
  
  @Component
  @Named("causeway.metamodel.value.BufferedImageValueSemantics")
  @Priority(PriorityPrecedence.LATE)
  public class BufferedImageValueSemantics
  extends ValueSemanticsAbstract<BufferedImage>
  implements
      ImageValueSemantics,
      OrderRelation<BufferedImage, Void> {
  
      @Override
      public Class<BufferedImage> getCorrespondingClass() {
          return BufferedImage.class;
      }
  
      @Override
      public ValueType getSchemaValueType() {
          return ValueType.BLOB;
      }
  
      // -- ORDER RELATION
  
      @Override
      public Void epsilon() {
          return null; // not used
      }
  
      @Override
      public int compare(final BufferedImage a, final BufferedImage b, final Void epsilon) {
          return _Images.compare(a, b);
      }
  
      @Override
      public boolean equals(final BufferedImage a, final BufferedImage b, final Void epsilon) {
          return compare(a, b, epsilon) == 0;
      }
  
      // -- COMPOSER
  
      @Override
      public ValueDecomposition decompose(final BufferedImage value) {
          return decomposeAsNullable(value, this::toBlob, ()->null);
      }
  
      @Override
      public BufferedImage compose(final ValueDecomposition decomposition) {
          return composeFromNullable(
                  decomposition, ValueWithTypeDto::getBlob, this::fromBlobDto, ()->null);
      }
  
      private BufferedImage fromBlobDto(final BlobDto blobDto) {
          return blobDto!=null
                      && blobDto.getBytes()!=null
                              ? _Images.fromBytes(blobDto.getBytes())
                              : null;
      }
  
      private Blob toBlob(final BufferedImage img) {
          return img!=null
                  // arbitrary name and mimetype - not used when recovering the image
                  ? new Blob("image", CommonMimeType.PNG.getBaseType(), _Images.toBytes(img))
                  : null;
      }
  
      // -- ENCODER DECODER
  
  //    @Override
  //    public String toEncodedString(final @Nullable BufferedImage image) {
  //        if(image==null) {
  //            return null;
  //        }
  //        return _Images.toBase64(image);
  //    }
  //
  //    @Override
  //    public BufferedImage fromEncodedString(final @Nullable String base64ImageData) {
  //        if(_Strings.isNullOrEmpty(base64ImageData)) {
  //            return null;
  //        }
  //        /*sonar-ignore-on*/
  //        return _Images.fromBase64(base64ImageData);
  //        /*sonar-ignore-off*/
  //    }
  
      // -- FACET
  
      @Override
      public int getWidth(final @Nullable ManagedObject object) {
          return unwrap(object).map(BufferedImage::getWidth).orElse(0);
      }
  
      @Override
      public int getHeight(final @Nullable ManagedObject object) {
          return unwrap(object).map(BufferedImage::getHeight).orElse(0);
      }
  
      @Override
      public Optional<BufferedImage> getImage(final @Nullable ManagedObject object) {
          return unwrap(object);
      }
  
      // -- HELPER
  
      private Optional<BufferedImage> unwrap(final @Nullable ManagedObject adapter) {
          if(ManagedObjects.isNullOrUnspecifiedOrEmpty(adapter)) {
              return Optional.empty();
          }
          /*sonar-ignore-on*/
          return Optional.ofNullable((BufferedImage) adapter.getPojo());
          /*sonar-ignore-off*/
      }
  
      @Override
      public Can<BufferedImage> getExamples() {
          return Can.of(
                  new BufferedImage(4, 4, BufferedImage.TYPE_INT_RGB),
                  new BufferedImage(8, 8, BufferedImage.TYPE_INT_RGB));
      }
  
  }
  