/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2002-2016, 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.data.postgis;

import java.sql.Connection;

import org.geotools.data.Query;
import org.geotools.data.simple.SimpleFeatureCollection;
import org.geotools.data.simple.SimpleFeatureIterator;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.factory.Hints;
import org.geotools.jdbc.JDBCDataStoreAPIOnlineTest;
import org.geotools.jdbc.JDBCDataStoreAPITestSetup;
import org.geotools.util.Version;

import com.vividsolutions.jts.geom.Geometry;

/**
 * 
 *
 * @source $URL$
 */
public class PostgisDataStoreAPIOnlineTest extends JDBCDataStoreAPIOnlineTest {

    @Override
    protected JDBCDataStoreAPITestSetup createTestSetup() {
        return new PostgisDataStoreAPITestSetup(new PostGISTestSetup());
    }

    @Override
    public void testGetFeatureWriterConcurrency() throws Exception {
        // postgis will lock indefinitely, won't throw an exception
    }

    /**
     * Test PostGIS specific collapsed simplified geometries (GEOT-4737)
     * @throws Exception
     */
    public void testSimplificationPreserveCollapsed() throws Exception {
        Connection cx = dataStore.getDataSource().getConnection();
        PostGISDialect dialect = ((PostGISDialect) dataStore.getSQLDialect());
        Version version = dialect.getVersion(cx);
        dataStore.closeSafe(cx);

        // Would use Assume.assumeTrue here, but this class extends TestCase
        // and thus is run as a JUnit 3 test, which reports false assumptions
        // as failures
        if(version.compareTo(PostGISDialect.V_2_2_0) < 0) {
            return;
        }

        SimpleFeatureSource fs = dataStore.getFeatureSource(tname("simplify_polygon"));

        if (fs.getSupportedHints().contains(Hints.GEOMETRY_SIMPLIFICATION)==false)
            return;

        SimpleFeatureCollection fColl = fs.getFeatures();
                SimpleFeatureIterator iterator = fColl.features();
                Geometry original = null;
                try {
                    if (iterator.hasNext()) {
                        original = (Geometry) iterator.next().getDefaultGeometry();
                    }
                } finally {
                    iterator.close();
                }
        double width = original.getEnvelope().getEnvelopeInternal().getWidth();

        Query query = new Query();
        Hints hints = new Hints(Hints.GEOMETRY_SIMPLIFICATION,width*2);
        query.setHints(hints);

        Geometry simplified = null;
        fColl = fs.getFeatures(query);
            iterator = fColl.features();
            try {
                if (iterator.hasNext())
                    simplified = (Geometry) iterator.next().getDefaultGeometry();
            } finally {
                iterator.close();
            }

        // PostGIS 2.2+ should use ST_Simplify's preserveCollapsed flag
        assertNotNull("Simplified geometry is null", simplified);
        assertTrue(original.getNumPoints()>=simplified.getNumPoints());
    }

}