/*
 * Firetweet - Twitter client for Android
 *
 *  Copyright (C) 2012-2015 Mariotaku Lee <mariotaku.lee@gmail.com>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package twitter4j;

import java.util.ArrayList;
import java.util.List;

import twitter4j.http.HttpParameter;

/**
 * @author Yusuke Yamamoto - yusuke at mac.com
 * @since Twitter4J 2.1.1
 */
public final class GeoQuery {

	private final GeoLocation location;
	private final String ip;
	private String accuracy;
	private String granularity;
	private int maxResults;
	public static final String NEIGHBORHOOD = "neighborhood";
	public static final String CITY = "city";

	/**
	 * Creates a GeoQuery with the specified location
	 * 
	 * @param location
	 */
	public GeoQuery(final GeoLocation location) {
		this.location = location;
		ip = null;
	}

	/**
	 * Creates a GeoQuery with the specified IP address
	 * 
	 * @param ip IP address
	 */
	public GeoQuery(final String ip) {
		this.ip = ip;
		location = null;
	}

	public GeoQuery accuracy(final String accuracy) {
		setAccuracy(accuracy);
		return this;
	}

	@Override
	public boolean equals(final Object o) {
		if (this == o) return true;
		if (o == null || getClass() != o.getClass()) return false;

		final GeoQuery geoQuery = (GeoQuery) o;

		if (maxResults != geoQuery.maxResults) return false;
		if (accuracy != null ? !accuracy.equals(geoQuery.accuracy) : geoQuery.accuracy != null) return false;
		if (granularity != null ? !granularity.equals(geoQuery.granularity) : geoQuery.granularity != null)
			return false;
		if (ip != null ? !ip.equals(geoQuery.ip) : geoQuery.ip != null) return false;
		if (location != null ? !location.equals(geoQuery.location) : geoQuery.location != null) return false;

		return true;
	}

	public String getAccuracy() {
		return accuracy;
	}

	public String getGranularity() {
		return granularity;
	}

	public String getIp() {
		return ip;
	}

	public GeoLocation getLocation() {
		return location;
	}

	public int getMaxResults() {
		return maxResults;
	}

	public GeoQuery granularity(final String granularity) {
		setGranularity(granularity);
		return this;
	}

	@Override
	public int hashCode() {
		int result = location != null ? location.hashCode() : 0;
		result = 31 * result + (ip != null ? ip.hashCode() : 0);
		result = 31 * result + (accuracy != null ? accuracy.hashCode() : 0);
		result = 31 * result + (granularity != null ? granularity.hashCode() : 0);
		result = 31 * result + maxResults;
		return result;
	}

	public GeoQuery maxResults(final int maxResults) {
		setMaxResults(maxResults);
		return this;
	}

	/**
	 * Sets a hint on the "region" in which to search. If a number, then this is
	 * a radius in meters, but it can also take a string that is suffixed with
	 * ft to specify feet. If this is not passed in, then it is assumed to be
	 * 0m. If coming from a device, in practice, this value is whatever accuracy
	 * the device has measuring its location (whether it be coming from a GPS,
	 * WiFi triangulation, etc.).
	 * 
	 * @param accuracy a hint on the "region" in which to search.
	 */
	public void setAccuracy(final String accuracy) {
		this.accuracy = accuracy;
	}

	/**
	 * Sets the minimal granularity of data to return. If this is not passed in,
	 * then neighborhood is assumed. city can also be passed.
	 * 
	 * @param granularity the minimal granularity of data to return
	 */
	public void setGranularity(final String granularity) {
		this.granularity = granularity;
	}

	/**
	 * Sets a hint as to the number of results to return. This does not
	 * guarantee that the number of results returned will equal max_results, but
	 * instead informs how many "nearby" results to return. Ideally, only pass
	 * in the number of places you intend to display to the user here.
	 * 
	 * @param maxResults A hint as to the number of results to return.
	 */
	public void setMaxResults(final int maxResults) {
		this.maxResults = maxResults;
	}

	@Override
	public String toString() {
		return "GeoQuery{" + "location=" + location + ", ip='" + ip + '\'' + ", accuracy='" + accuracy + '\''
				+ ", granularity='" + granularity + '\'' + ", maxResults=" + maxResults + '}';
	}

	private void appendParameter(final String name, final double value, final List<HttpParameter> params) {
		params.add(new HttpParameter(name, String.valueOf(value)));
	}

	private void appendParameter(final String name, final int value, final List<HttpParameter> params) {
		if (0 < value) {
			params.add(new HttpParameter(name, String.valueOf(value)));
		}
	}

	private void appendParameter(final String name, final String value, final List<HttpParameter> params) {
		if (value != null) {
			params.add(new HttpParameter(name, value));
		}
	}

	/* package */HttpParameter[] asHttpParameterArray() {
		final ArrayList<HttpParameter> params = new ArrayList<HttpParameter>();
		if (location != null) {
			appendParameter("lat", location.getLatitude(), params);
			appendParameter("long", location.getLongitude(), params);

		}
		if (ip != null) {
			appendParameter("ip", ip, params);

		}
		appendParameter("accuracy", accuracy, params);
		appendParameter("granularity", granularity, params);
		appendParameter("max_results", maxResults, params);
		final HttpParameter[] paramArray = new HttpParameter[params.size()];
		return params.toArray(paramArray);
	}
}