/*
    * 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
    *
    *      https://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.
   */
  
  /*
   * This is not the original file distributed by the Apache Software Foundation
   * It has been modified by the Hipparchus project
   */
  package org.hipparchus.geometry.euclidean.twod;
  
  import org.hipparchus.exception.MathIllegalArgumentException;
  import org.hipparchus.geometry.Point;
  import org.hipparchus.geometry.euclidean.oned.Euclidean1D;
  import org.hipparchus.geometry.euclidean.oned.Vector1D;
  import org.hipparchus.geometry.partitioning.Transform;
  import org.hipparchus.util.FastMath;
  import org.junit.Assert;
  import org.junit.Test;
  
  public class LineTest {
  
      @Test
      public void testContains() {
          Line l = new Line(new Vector2D(0, 1), new Vector2D(1, 2), 1.0e-10);
          Assert.assertTrue(l.contains(new Vector2D(0, 1)));
          Assert.assertTrue(l.contains(new Vector2D(1, 2)));
          Assert.assertTrue(l.contains(new Vector2D(7, 8)));
          Assert.assertTrue(! l.contains(new Vector2D(8, 7)));
      }
  
      @Test
      public void testAbscissa() {
          Line l = new Line(new Vector2D(2, 1), new Vector2D(-2, -2), 1.0e-10);
          Assert.assertEquals(0.0,
                              (l.toSubSpace(new Vector2D(-3,  4))).getX(),
                              1.0e-10);
          Assert.assertEquals(0.0,
                              (l.toSubSpace(new Vector2D( 3, -4))).getX(),
                              1.0e-10);
          Assert.assertEquals(-5.0,
                              (l.toSubSpace(new Vector2D( 7, -1))).getX(),
                              1.0e-10);
          Assert.assertEquals( 5.0,
                               (l.toSubSpace(new Vector2D(-1, -7))).getX(),
                               1.0e-10);
      }
  
      @Test
      public void testOffset() {
          Line l = new Line(new Vector2D(2, 1), new Vector2D(-2, -2), 1.0e-10);
          Assert.assertEquals(-5.0, l.getOffset(new Vector2D(5, -3)), 1.0e-10);
          Assert.assertEquals(+5.0, l.getOffset(new Vector2D(-5, 2)), 1.0e-10);
      }
  
      @Test
      public void testDistance() {
          Line l = new Line(new Vector2D(2, 1), new Vector2D(-2, -2), 1.0e-10);
          Assert.assertEquals(+5.0, l.distance(new Vector2D(5, -3)), 1.0e-10);
          Assert.assertEquals(+5.0, l.distance(new Vector2D(-5, 2)), 1.0e-10);
      }
  
      @Test
      public void testPointAt() {
          Line l = new Line(new Vector2D(2, 1), new Vector2D(-2, -2), 1.0e-10);
          for (double a = -2.0; a < 2.0; a += 0.2) {
              Point<Euclidean1D> pA = new Vector1D(a);
              Point<Euclidean2D> point = l.toSpace(pA);
              Assert.assertEquals(a, (l.toSubSpace(point)).getX(), 1.0e-10);
              Assert.assertEquals(0.0, l.getOffset(point),   1.0e-10);
              for (double o = -2.0; o < 2.0; o += 0.2) {
                  point = l.getPointAt((Vector1D) pA, o);
                  Assert.assertEquals(a, (l.toSubSpace(point)).getX(), 1.0e-10);
                  Assert.assertEquals(o, l.getOffset(point),   1.0e-10);
              }
          }
      }
  
      @Test
      public void testOriginOffset() {
          Line l1 = new Line(new Vector2D(0, 1), new Vector2D(1, 2), 1.0e-10);
          Assert.assertEquals(FastMath.sqrt(0.5), l1.getOriginOffset(), 1.0e-10);
          Line l2 = new Line(new Vector2D(1, 2), new Vector2D(0, 1), 1.0e-10);
          Assert.assertEquals(-FastMath.sqrt(0.5), l2.getOriginOffset(), 1.0e-10);
      }
  
      @Test
     public void testParallel() {
         Line l1 = new Line(new Vector2D(0, 1), new Vector2D(1, 2), 1.0e-10);
         Line l2 = new Line(new Vector2D(2, 2), new Vector2D(3, 3), 1.0e-10);
         Assert.assertTrue(l1.isParallelTo(l2));
         Line l3 = new Line(new Vector2D(1, 0), new Vector2D(0.5, -0.5), 1.0e-10);
         Assert.assertTrue(l1.isParallelTo(l3));
         Line l4 = new Line(new Vector2D(1, 0), new Vector2D(0.5, -0.51), 1.0e-10);
         Assert.assertTrue(! l1.isParallelTo(l4));
     }
 
     @Test
     public void testTransform() throws MathIllegalArgumentException {
 
         Line l1 = new Line(new Vector2D(1.0 ,1.0), new Vector2D(4.0 ,1.0), 1.0e-10);
         Transform<Euclidean2D, Euclidean1D> t1 =
             Line.getTransform(0.0, 0.5, -1.0, 0.0, 1.0, 1.5);
         Assert.assertEquals(0.5 * FastMath.PI,
                             ((Line) t1.apply(l1)).getAngle(),
                             1.0e-10);
 
         Line l2 = new Line(new Vector2D(0.0, 0.0), new Vector2D(1.0, 1.0), 1.0e-10);
         Transform<Euclidean2D, Euclidean1D> t2 =
             Line.getTransform(0.0, 0.5, -1.0, 0.0, 1.0, 1.5);
         Assert.assertEquals(FastMath.atan2(1.0, -2.0),
                             ((Line) t2.apply(l2)).getAngle(),
                             1.0e-10);
 
     }
 
     @Test
     public void testIntersection() {
         Line    l1 = new Line(new Vector2D( 0, 1), new Vector2D(1, 2), 1.0e-10);
         Line    l2 = new Line(new Vector2D(-1, 2), new Vector2D(2, 1), 1.0e-10);
         Vector2D p  = l1.intersection(l2);
         Assert.assertEquals(0.5, p.getX(), 1.0e-10);
         Assert.assertEquals(1.5, p.getY(), 1.0e-10);
     }
 
 }