/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2006-2015, Open Source Geospatial Foundation (OSGeo)
 *
 *    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;
 *    version 2.1 of the License.
 *
 *    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.
 *
 */
package org.geotools.gce.gtopo30;

import java.awt.Rectangle;
import java.net.URL;

import javax.media.jai.PlanarImage;

import org.geotools.coverage.grid.GridCoverage2D;
import org.geotools.coverage.grid.GridEnvelope2D;
import org.geotools.coverage.grid.GridGeometry2D;
import org.geotools.coverage.grid.io.AbstractGridCoverage2DReader;
import org.geotools.coverage.grid.io.AbstractGridFormat;
import org.geotools.test.TestData;
import org.opengis.parameter.GeneralParameterValue;
import org.opengis.parameter.ParameterValueGroup;

/**
 * Purpose of this class is testing the ability of this plug in to read and
 * write back the in gtopo30 format.
 * 
 * @author Simone Giannecchini
 *
 *
 * @source $URL$
 */
public class GT30DecimationTest extends GT30TestBase {
	/**
	 * Constructor for GT30ReaderTest.
	 * 
	 * @param arg0
	 */
	public GT30DecimationTest(String arg0) {
		super(arg0);
	}

	/**
	 * Testing reader and writer for gtopo. This test first of all read an
	 * existing gtopo tessel into a coverage object, therefore it writes it back
	 * onto the disk. Once the coverage is written back\ it loads it again
	 * building a new coverage which is finally visualized.
	 * 
	 * @throws Exception
	 */
	public void test() throws Exception {

		URL statURL = TestData.url(this, (new StringBuffer(this.fileName)
				.append(".DEM").toString()));
		AbstractGridFormat format = (AbstractGridFormat) new GTopo30FormatFactory()
				.createFormat();

		if (format.accepts(statURL)) {

			/**
			 * 
			 * STEP 1 Reading the coverage into memory in order to write it down
			 * again
			 * 
			 */
			// get a reader
			AbstractGridCoverage2DReader reader = (AbstractGridCoverage2DReader) format
					.getReader(statURL);

			// get a grid coverage
			final ParameterValueGroup params = reader.getFormat().getReadParameters();
			params.parameter(
					AbstractGridFormat.READ_GRIDGEOMETRY2D.getName().toString()).setValue(
							new GridGeometry2D(new GridEnvelope2D(new Rectangle(0, 0, 640, 480)), reader.getOriginalEnvelope()));
			gc = ((GridCoverage2D) reader.read((GeneralParameterValue[]) params.values().toArray(new GeneralParameterValue[1])));
			if(TestData.isInteractiveTest())
			{
//				 logging some info
				logger.info(gc.getCoordinateReferenceSystem2D().toWKT());
				logger.info(gc.toString());
				gc.show();
			}
			else
			{
				PlanarImage.wrapRenderedImage(gc.getRenderedImage()).getTiles();
			}

			

		}
	}

	public static final void main(String[] args) throws Exception {
		junit.textui.TestRunner.run(GT30DecimationTest.class);
	}

}