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/*
 * 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.baremaps.openstreetmap.function;



import java.util.function.Consumer;
import org.apache.baremaps.openstreetmap.model.Block;
import org.apache.baremaps.openstreetmap.model.DataBlock;
import org.apache.baremaps.openstreetmap.model.Entity;
import org.apache.baremaps.openstreetmap.model.HeaderBlock;
import org.apache.baremaps.openstreetmap.stream.StreamException;

/** Represents an operation on the entities of blocks of different types. */
public class BlockEntitiesHandler implements Consumer {

  private final Consumer consumer;

  /**
   * Constructs a block consumer that applies the specified consumer to the block entities.
   *
   * @param consumer the entity consumer
   */
  public BlockEntitiesHandler(Consumer consumer) {
    this.consumer = consumer;
  }

  @Override
  public void accept(Block block) {
    if (block instanceof HeaderBlock headerBlock) {
      consumer.accept(headerBlock.getHeader());
      consumer.accept(headerBlock.getBound());
    } else if (block instanceof DataBlock dataBlock) {
      dataBlock.getDenseNodes().forEach(consumer);
      dataBlock.getNodes().forEach(consumer);
      dataBlock.getWays().forEach(consumer);
      dataBlock.getRelations().forEach(consumer);
    } else {
      throw new StreamException("Unknown block type.");
    }
  }

}