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package br.com.anteros.nosql.persistence.mongodb.aggregation;

import br.com.anteros.nosql.persistence.mongodb.geo.Geometry;
import br.com.anteros.nosql.persistence.mongodb.geo.GeometryShapeConverter;
import br.com.anteros.nosql.persistence.mongodb.geo.Point;
import br.com.anteros.nosql.persistence.session.query.NoSQLQuery;

public final class GeoNear {
	private final double[] nearLegacy;
	private final Geometry nearGeoJson;
	private final String distanceField;
	private final Long limit;
	private final Long maxDocuments;
	private final Double maxDistance;
	private final NoSQLQuery query;
	private final Boolean spherical;
	private final Double distanceMultiplier;
	private final String includeLocations;

	private GeoNear(final GeoNearBuilder builder) {
		nearLegacy = builder.nearLegacy;
		nearGeoJson = builder.nearGeoJson;
		distanceField = builder.distanceField;
		limit = builder.limit;
		maxDocuments = builder.maxDocuments;
		maxDistance = builder.maxDistance;
		query = builder.query;
		spherical = builder.spherical;
		distanceMultiplier = builder.distanceMultiplier;
		includeLocations = builder.includeLocations;
	}

	public static GeoNearBuilder builder(final String distanceField) {
		return new GeoNearBuilder(distanceField);
	}

	public String getDistanceField() {
		return distanceField;
	}

	public Double getDistanceMultiplier() {
		return distanceMultiplier;
	}

	public String getIncludeLocations() {
		return includeLocations;
	}

	public Long getLimit() {
		return limit;
	}

	public Double getMaxDistance() {
		return maxDistance;
	}

	public Long getMaxDocuments() {
		return maxDocuments;
	}

	public double[] getNear() {
		double[] copy = new double[0];
		if (nearLegacy != null) {
			copy = new double[nearLegacy.length];
			System.arraycopy(nearLegacy, 0, copy, 0, nearLegacy.length);
		}
		return copy;
	}

	Object getNearAsDBObject(final GeometryShapeConverter.PointConverter pointConverter) {
		if (nearGeoJson != null) {
			return pointConverter.encode(nearGeoJson);
		} else {
			return getNear();
		}
	}

	public NoSQLQuery getQuery() {
		return query;
	}

	public Boolean getSpherical() {
		return spherical;
	}

	public static class GeoNearBuilder {
		private final String distanceField;
		private Long limit;
		private Long maxDocuments;
		private Double maxDistance;
		private NoSQLQuery query;
		private Boolean spherical;
		private Double distanceMultiplier;
		private String includeLocations;
		private Boolean uniqueDocuments;
		private double[] nearLegacy;
		private Geometry nearGeoJson;

		public GeoNearBuilder(final String distanceField) {
			this.distanceField = distanceField;
		}

		public GeoNear build() {
			return new GeoNear(this);
		}

		public GeoNearBuilder setDistanceMultiplier(final Double distanceMultiplier) {
			this.distanceMultiplier = distanceMultiplier;
			return this;
		}

		public GeoNearBuilder setIncludeLocations(final String includeLocations) {
			this.includeLocations = includeLocations;
			return this;
		}

		public GeoNearBuilder setLimit(final Long limit) {
			this.limit = limit;
			return this;
		}

		public GeoNearBuilder setMaxDistance(final Double maxDistance) {
			this.maxDistance = maxDistance;
			return this;
		}

		public GeoNearBuilder setMaxDocuments(final Long num) {
			this.maxDocuments = num;
			return this;
		}

		public GeoNearBuilder setNear(final double latitude, final double longitude) {
			this.nearLegacy = new double[] { longitude, latitude };
			return this;
		}

		public GeoNearBuilder setNear(final Point point) {
			this.nearGeoJson = point;
			return this;
		}

		public GeoNearBuilder setQuery(final NoSQLQuery query) {
			this.query = query;
			return this;
		}

		public GeoNearBuilder setSpherical(final Boolean spherical) {
			this.spherical = spherical;
			return this;
		}

	}
}