/*
    * 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.geometry.examples.io.threed;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.util.List;
  import java.util.stream.Collectors;
  
  import org.apache.commons.geometry.core.precision.DoublePrecisionContext;
  import org.apache.commons.geometry.core.precision.EpsilonDoublePrecisionContext;
  import org.apache.commons.geometry.euclidean.EuclideanTestUtils;
  import org.apache.commons.geometry.euclidean.threed.BoundarySource3D;
  import org.apache.commons.geometry.euclidean.threed.Planes;
  import org.apache.commons.geometry.euclidean.threed.Triangle3D;
  import org.apache.commons.geometry.euclidean.threed.Vector3D;
  import org.junit.Assert;
  import org.junit.Test;
  
  public class DefaultModelIOHandlerRegistryTest {
  
      private static final double TEST_EPS = 1e-10;
  
      private static final DoublePrecisionContext TEST_PRECISION =
              new EpsilonDoublePrecisionContext(TEST_EPS);
  
      private DefaultModelIOHandlerRegistry registry = new DefaultModelIOHandlerRegistry();
  
      @Test
      public void testDefaultHandlers() {
          // act
          List<ModelIOHandler> handlers = registry.getHandlers();
  
          // assert
          Assert.assertEquals(1, handlers.size());
      }
  
      @Test
      public void testSupportedTypes() {
          // act/assert
          Assert.assertTrue(registry.handlesType("obj"));
          Assert.assertTrue(registry.handlesType("OBJ"));
      }
  
      @Test
      public void testReadWrite_supportedTypes() {
          // act/assert
          checkWriteRead("obj");
      }
  
      private void checkWriteRead(String type) {
          // arrange
          BoundarySource3D model = BoundarySource3D.from(
                  Planes.triangleFromVertices(Vector3D.ZERO, Vector3D.of(1, 0, 0), Vector3D.of(0, 1, 0), TEST_PRECISION)
              );
  
          ByteArrayOutputStream out = new ByteArrayOutputStream();
  
          // act
          registry.write(model, type, out);
          BoundarySource3D result = registry.read(type, new ByteArrayInputStream(out.toByteArray()), TEST_PRECISION);
  
          // assert
          List<Triangle3D> tris = result.triangleStream().collect(Collectors.toList());
          Assert.assertEquals(1, tris.size());
  
          Triangle3D tri = tris.get(0);
          EuclideanTestUtils.assertCoordinatesEqual(Vector3D.ZERO, tri.getPoint1(), TEST_EPS);
          EuclideanTestUtils.assertCoordinatesEqual(Vector3D.of(1, 0, 0), tri.getPoint2(), TEST_EPS);
          EuclideanTestUtils.assertCoordinatesEqual(Vector3D.of(0, 1, 0), tri.getPoint3(), TEST_EPS);
      }
  }