content: /*
   * 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 com.datastax.dse.driver.internal.core.graph;
  
  import com.datastax.dse.driver.api.core.data.geometry.Geometry;
  import com.datastax.dse.driver.api.core.data.geometry.LineString;
  import com.datastax.dse.driver.api.core.data.geometry.Point;
  import com.datastax.dse.driver.api.core.data.geometry.Polygon;
  import com.datastax.dse.driver.api.core.graph.predicates.Geo;
  import com.datastax.dse.driver.internal.core.data.geometry.Distance;
  import com.datastax.oss.driver.shaded.guava.common.base.Preconditions;
  
  /**
   * List of predicates for geolocation usage with DseGraph and Search indexes. Should not be accessed
   * directly but through the {@link Geo} static methods.
   */
  public enum GeoPredicate implements DsePredicate {
  
    /** Matches values within the distance specified by the condition over a Haversine geometry. */
    inside {
      @Override
      public boolean test(Object value, Object condition) {
        preEvaluate(condition);
        if (value == null) {
          return false;
        }
        Preconditions.checkArgument(value instanceof Geometry);
        Distance distance = (Distance) condition;
        if (value instanceof Point) {
          return haversineDistanceInDegrees(distance.getCenter(), (Point) value)
              <= distance.getRadius();
        } else if (value instanceof Polygon) {
          for (Point point : ((Polygon) value).getExteriorRing()) {
            if (haversineDistanceInDegrees(distance.getCenter(), point) > distance.getRadius()) {
              return false;
            }
          }
        } else if (value instanceof LineString) {
          for (Point point : ((LineString) value).getPoints()) {
            if (haversineDistanceInDegrees(distance.getCenter(), point) > distance.getRadius()) {
              return false;
            }
          }
        } else {
          throw new UnsupportedOperationException(
              String.format("Value type '%s' unsupported", value.getClass().getName()));
        }
  
        return true;
      }
  
      @Override
      public String toString() {
        return "inside";
      }
    },
  
    /**
     * Matches values contained in the geometric entity specified by the condition on a 2D Euclidean
     * plane.
     */
    insideCartesian {
      @Override
      public boolean test(Object value, Object condition) {
        preEvaluate(condition);
        if (value == null) {
          return false;
        }
        Preconditions.checkArgument(value instanceof Geometry);
        return ((Geometry) condition).contains((Geometry) value);
      }
  
      @Override
      public String toString() {
        return "insideCartesian";
      }
    };
  
    @Override
    public boolean isValidCondition(Object condition) {
      return condition != null;
    }
  
    static double haversineDistanceInDegrees(Point p1, Point p2) {
      double dLat = Math.toRadians(p2.Y() - p1.Y());
      double dLon = Math.toRadians(p2.X() - p1.X());
      double lat1 = Math.toRadians(p1.Y());
      double lat2 = Math.toRadians(p2.Y());
  
      double a =
          Math.pow(Math.sin(dLat / 2), 2)
              + Math.pow(Math.sin(dLon / 2), 2) * Math.cos(lat1) * Math.cos(lat2);
      double c = 2 * Math.asin(Math.sqrt(a));
      return Math.toDegrees(c);
    }
  }
  