/*
    * 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.euclidean.threed;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  
  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.junit.Assert;
  import org.junit.Test;
  
  public class BoundarySourceBoundsBuilder3DTest {
  
      private static final double TEST_EPS = 1e-10;
  
      private static final DoublePrecisionContext TEST_PRECISION =
              new EpsilonDoublePrecisionContext(TEST_EPS);
  
      @Test
      public void testGetBounds_noBoundaries() {
          // arrange
          final BoundarySource3D src = BoundarySource3D.from(new ArrayList<>());
          final BoundarySourceBoundsBuilder3D builder = new BoundarySourceBoundsBuilder3D();
  
          // act
          final Bounds3D b = builder.getBounds(src);
  
          // assert
          Assert.assertNull(b);
      }
  
      @Test
      public void testGetBounds_singleFiniteBoundary() {
          // arrange
          final ConvexPolygon3D poly = Planes.convexPolygonFromVertices(Arrays.asList(
                  Vector3D.of(1, 1, 1),
                  Vector3D.of(1, 0, 2),
                  Vector3D.of(3, 4, 5)), TEST_PRECISION);
  
          final BoundarySource3D src = BoundarySource3D.from(poly);
          final BoundarySourceBoundsBuilder3D builder = new BoundarySourceBoundsBuilder3D();
  
          // act
          final Bounds3D b = builder.getBounds(src);
  
          // assert
          checkBounds(b, Vector3D.of(1, 0, 1), Vector3D.of(3, 4, 5));
          for (final Vector3D pt : poly.getVertices()) {
              Assert.assertTrue(b.contains(pt));
          }
      }
  
      @Test
      public void testGetBounds_multipleFiniteBoundaries() {
          // arrange
          final ConvexPolygon3D poly1 = Planes.convexPolygonFromVertices(Arrays.asList(
                  Vector3D.of(1, 1, 1),
                  Vector3D.of(1, 0, 2),
                  Vector3D.of(3, 4, 5)), TEST_PRECISION);
  
          final ConvexPolygon3D poly2 = Planes.convexPolygonFromVertices(Arrays.asList(
                  Vector3D.of(-1, 1, 1),
                  Vector3D.of(1, 4, 4),
                  Vector3D.of(7, 4, 5)), TEST_PRECISION);
  
          final ConvexPolygon3D poly3 = Planes.convexPolygonFromVertices(Arrays.asList(
                  Vector3D.of(-2, 1, 1),
                  Vector3D.of(1, 7, 2),
                  Vector3D.of(5, 4, 10)), TEST_PRECISION);
  
          final BoundarySource3D src = BoundarySource3D.from(poly1, poly2, poly3);
          final BoundarySourceBoundsBuilder3D builder = new BoundarySourceBoundsBuilder3D();
  
          // act
          final Bounds3D b = builder.getBounds(src);
  
          // assert
          checkBounds(b, Vector3D.of(-2, 0, 1), Vector3D.of(7, 7, 10));
  
          src.boundaryStream().forEach(boundary -> {
              for (final Vector3D pt : boundary.getVertices()) {
                  Assert.assertTrue(b.contains(pt));
              }
         });
     }
 
     @Test
     public void testGetBounds_singleInfiniteBoundary() {
         // arrange
         final PlaneConvexSubset boundary = Planes.fromPointAndNormal(Vector3D.ZERO, Vector3D.Unit.PLUS_Z, TEST_PRECISION)
                 .span();
         final BoundarySource3D src = BoundarySource3D.from(boundary);
         final BoundarySourceBoundsBuilder3D builder = new BoundarySourceBoundsBuilder3D();
 
         // act
         final Bounds3D b = builder.getBounds(src);
 
         // assert
         Assert.assertNull(b);
     }
 
     @Test
     public void testGetBounds_mixedFiniteAndInfiniteBoundaries() {
         // arrange
         final PlaneConvexSubset inf = Planes.fromPointAndNormal(Vector3D.ZERO, Vector3D.Unit.PLUS_Z, TEST_PRECISION)
                 .span()
                 .split(Planes.fromPointAndNormal(Vector3D.ZERO, Vector3D.Unit.PLUS_Y, TEST_PRECISION))
                 .getMinus();
 
         final ConvexPolygon3D poly1 = Planes.convexPolygonFromVertices(Arrays.asList(
                 Vector3D.of(1, 1, 1),
                 Vector3D.of(1, 0, 2),
                 Vector3D.of(3, 4, 5)), TEST_PRECISION);
 
         final ConvexPolygon3D poly2 = Planes.convexPolygonFromVertices(Arrays.asList(
                 Vector3D.of(-1, 1, 1),
                 Vector3D.of(1, 4, 4),
                 Vector3D.of(7, 4, 5)), TEST_PRECISION);
 
         final ConvexPolygon3D poly3 = Planes.convexPolygonFromVertices(Arrays.asList(
                 Vector3D.of(-2, 1, 1),
                 Vector3D.of(1, 7, 2),
                 Vector3D.of(5, 4, 10)), TEST_PRECISION);
 
         final BoundarySource3D src = BoundarySource3D.from(poly1, poly2, inf, poly3);
         final BoundarySourceBoundsBuilder3D builder = new BoundarySourceBoundsBuilder3D();
 
         // act
         final Bounds3D b = builder.getBounds(src);
 
         // assert
         Assert.assertNull(b);
     }
 
     private static void checkBounds(final Bounds3D b, final Vector3D min, final Vector3D max) {
         EuclideanTestUtils.assertCoordinatesEqual(min, b.getMin(), TEST_EPS);
         EuclideanTestUtils.assertCoordinatesEqual(max, b.getMax(), TEST_EPS);
     }
 }