/*
 * The JTS Topology Suite is a collection of Java classes that
 * implement the fundamental operations required to validate a given
 * geo-spatial data set to a known topological specification.
 *
 * Copyright (C) 2001 Vivid Solutions
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * For more information, contact:
 *
 *     Vivid Solutions
 *     Suite #1A
 *     2328 Government Street
 *     Victoria BC  V8T 5G5
 *     Canada
 *
 *     (250)385-6040
 *     www.vividsolutions.com
 */
package com.revolsys.geometry.test.old.operation;

import java.util.List;

import com.revolsys.geometry.algorithm.BoundaryNodeRule;
import com.revolsys.geometry.model.Geometry;
import com.revolsys.geometry.model.GeometryFactory;
import com.revolsys.geometry.model.Point;
import com.revolsys.geometry.model.impl.PointDoubleXY;
import com.revolsys.geometry.operation.valid.GeometryValidationError;
import com.revolsys.geometry.wkb.ParseException;

import junit.framework.TestCase;
import junit.textui.TestRunner;

/**
 * Tests with different {@link BoundaryNodeRule}s.
 *
 * @author Martin Davis
 * @version 1.7
 */
public class IsSimpleTest extends TestCase {
  private static final double TOLERANCE = 0.00005;

  public static void main(final String args[]) {
    TestRunner.run(IsSimpleTest.class);
  }

  private final GeometryFactory geometryFactory = GeometryFactory.DEFAULT_3D;

  public IsSimpleTest(final String name) {
    super(name);
  }

  private void runIsSimpleTest(final String wkt, final boolean expectedResult)
    throws ParseException {
    runIsSimpleTest(wkt, expectedResult, null);
  }

  private void runIsSimpleTest(final String wkt, final boolean expectedResult,
    final Point expectedLocation) throws ParseException {
    final Geometry g = this.geometryFactory.geometry(wkt);
    final List<GeometryValidationError> errors = g.getIsSimpleErrors();
    final boolean isSimple = g.isSimple();

    // if geom is not simple, should have a valid location
    assertTrue(isSimple || !errors.isEmpty());

    assertTrue(expectedResult == isSimple);

    if (!isSimple && expectedLocation != null) {
      final Point nonSimpleLoc = errors.get(0).getErrorPoint();
      assertTrue(expectedLocation.distancePoint(nonSimpleLoc) < TOLERANCE);
    }
  }

  /**
   * 2 LineStrings touching at an endpoint
   * @throws Exception
   */
  public void test2TouchAtEndpoint() throws Exception {
    final String a = "MULTILINESTRING((0 1, 1 1, 2 1), (0 0, 1 0, 2 1))";
    runIsSimpleTest(a, true, new PointDoubleXY(2, 1));
  }

  /**
   * 3 LineStrings touching at an endpoint.
   *
   * @throws Exception
   */
  public void test3TouchAtEndpoint() throws Exception {
    final String a = "MULTILINESTRING ((0 1, 1 1, 2 1),   (0 0, 1 0, 2 1),  (0 2, 1 2, 2 1))";

    // rings are simple under all rules
    runIsSimpleTest(a, true, new PointDoubleXY(2, 1));
  }

  public void testCross() throws Exception {
    final String a = "MULTILINESTRING ((20 120, 120 20), (20 20, 120 120))";
    runIsSimpleTest(a, false, new PointDoubleXY(70, 70));
  }

  public void testMultiLineStringWithRingTouchAtEndpoint() throws Exception {
    final String a = "MULTILINESTRING ((100 100, 20 20, 200 20, 100 100), (100 200, 100 100))";

    // under Mod-2, the ring has no boundary, so the line intersects the
    // interior ==> not simple
    runIsSimpleTest(a, false, new PointDoubleXY(100, 100));
  }

  public void testRing() throws Exception {
    final String a = "LINESTRING (100 100, 20 20, 200 20, 100 100)";

    // rings are simple under all rules
    runIsSimpleTest(a, true);
  }

}