/*******************************************************************************
 *     SDR Trunk 
 *     Copyright (C) 2014 Dennis Sheirer
 * 
 *     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 org.jdesktop.swingx.mapviewer.bmng;

import org.jdesktop.swingx.mapviewer.TileFactoryInfo;

/**
 * A TileFactoryInfo subclass which knows how to connect to the SwingLabs map server. This server contains 2k resolution
 * Blue Marble data from NASA.
 */
public class SLMapServerInfo extends TileFactoryInfo
{
	private static final int pyramid_top = 8 + 1;
	private static final int midpoint = 5;
	private static final int normal_tile_size = 675;

	/**
	 * Uses the default base URL
	 */
	public SLMapServerInfo()
	{
		this("http://maps.joshy.net/tiles/bmng_tiles_3");
	}

	/**
	 * @param baseURL the base URL
	 */
	public SLMapServerInfo(String baseURL)
	{
		// joshy: this was version one of the tiles
		// super(0, 5, 5, 256, true, false, "http://maps.joshy.net/bmng_tiles_1", "", "", "");
		// super(0, pyramid_top-1, pyramid_top,
		// 675,
		// true, false, "http://maps.joshy.net/bmng_tiles_2", "", "", "");
		// super(0, pyramid_top-1, pyramid_top,
		// normal_tile_size,
		// true, false, "file:/Users/joshy/projects/java.net/ImageTileCutter/tiles", "", "", "");
		super(0, pyramid_top - 1, pyramid_top, normal_tile_size, true, false, baseURL, "", "", "");
		setDefaultZoomLevel(0);
	}

	/**
	 * @return the midpoint
	 */
	public int getMidpoint()
	{
		return midpoint;
	}

	@Override
	public int getTileSize(int zoom)
	{
		int size = super.getTileSize(zoom);
		if (zoom < midpoint)
		{
			return size;
		}
		else
		{
			for (int i = 0; i < zoom + 1 - midpoint; i++)
			{
				size = size / 2;
			}
			return size;
		}
	}

	@Override
	public int getMapWidthInTilesAtZoom(int zoom)
	{
		if (zoom < midpoint)
		{
			return (int) Math.pow(2, midpoint - zoom);
		}
		else
		{
			return 1;
		}
	}

	@Override
	public String getTileUrl(int x, int y, int zoom)
	{
		int ty = y;
		int tx = x;

		// int width_in_tiles = (int)Math.pow(2,pyramid_top-zoom);
		int width_in_tiles = getMapWidthInTilesAtZoom(zoom);
		// System.out.println("width in tiles = " + width_in_tiles + " x = " + tx + " y = " + ty);
		if (ty < 0)
		{
			return null;
		}
		if (zoom < midpoint)
		{
			if (ty >= width_in_tiles / 2)
			{
				return null;
			}
		}
		else
		{
			if (ty != 0)
			{
				return null;
			}
		}

		String url = this.baseURL + "/" + zoom + "/" + ty + "/" + tx + ".jpg";
		// System.out.println("returning: " + url);
		return url;
	}

}