/*
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 *
 *    (C) 2002-2008, 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.gml3;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;

import junit.framework.TestCase;

import org.apache.xerces.parsers.SAXParser;
import org.eclipse.xsd.XSDSchema;
import org.geotools.data.simple.SimpleFeatureCollection;
import org.geotools.gml2.SrsSyntax;
import org.geotools.gml3.bindings.GML3MockData;
import org.geotools.gml3.bindings.TEST;
import org.geotools.gml3.bindings.TestConfiguration;
import org.geotools.xml.Encoder;
import org.geotools.xml.Parser;
import org.opengis.feature.simple.SimpleFeature;
import org.w3c.dom.Document;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;


/**
 * 
 *
 * @source $URL$
 */
public class GML3EncodingTest extends TestCase {
    boolean isOffline() throws Exception {
        //this test will only run if network is available
        URL url = new URL("http://schemas.opengis.net");

        try {
            URLConnection conn = url.openConnection();
            conn.setConnectTimeout(2000);
            conn.getInputStream().read();
        } catch (Exception e) {
            return true;
        }

        return false;
    }

    public void testWithConfiguration() throws Exception {
        if (isOffline()) {
            return;
        }

        TestConfiguration configuration = new TestConfiguration();

        //first parse in test data
        Parser parser = new Parser(configuration);
        SimpleFeatureCollection fc = (SimpleFeatureCollection) parser.parse(TestConfiguration.class
                .getResourceAsStream("test.xml"));
        assertNotNull(fc);

        XSDSchema schema = TEST.getInstance().getSchema();
        assertNotNull(schema);

        Encoder encoder = new Encoder(configuration, schema);
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        encoder.write(fc, TEST.TestFeatureCollection, output);

        SAXParser saxParser = new SAXParser();
        saxParser.setFeature("http://xml.org/sax/features/validation", true);
        saxParser.setFeature("http://apache.org/xml/features/validation/schema", true);
        saxParser.setFeature("http://apache.org/xml/features/validation/schema-full-checking", true);

        saxParser.setProperty("http://apache.org/xml/properties/schema/external-noNamespaceSchemaLocation",
            TEST.NAMESPACE);

        saxParser.setProperty("http://apache.org/xml/properties/schema/external-schemaLocation",
            TEST.NAMESPACE + " " + configuration.getSchemaFileURL());

        final ArrayList errors = new ArrayList();
        DefaultHandler handler = new DefaultHandler() {
                public void error(SAXParseException e)
                    throws SAXException {
                    System.out.println(e.getMessage());
                    errors.add(e);
                }

                public void fatalError(SAXParseException e)
                    throws SAXException {
                    System.out.println(e.getMessage());
                    errors.add(e);
                }
            };

        saxParser.setErrorHandler(handler);
        saxParser.parse(new InputSource(new ByteArrayInputStream(output.toByteArray())));

        assertTrue(errors.isEmpty());
    }

    public void testWithApplicationSchemaConfiguration()
        throws Exception {
        if (isOffline()) {
            return;
        }

        // The schema location needs to be a well formed URI/URL, a file path is not sufficient.
        String schemaLocation = TestConfiguration.class.getResource("test.xsd").toString();

        ApplicationSchemaConfiguration configuration = new ApplicationSchemaConfiguration(TEST.NAMESPACE,
                schemaLocation);

        //first parse in test data
        Parser parser = new Parser(configuration);
        SimpleFeatureCollection fc = (SimpleFeatureCollection) parser.parse(TestConfiguration.class
                .getResourceAsStream("test.xml"));
        assertNotNull(fc);

        XSDSchema schema = TEST.getInstance().getSchema();
        assertNotNull(schema);

        Encoder encoder = new Encoder(configuration, schema);

        ByteArrayOutputStream output = new ByteArrayOutputStream();
        encoder.write(fc, TEST.TestFeatureCollection, output);

        SAXParser saxParser = new SAXParser();
        saxParser.setFeature("http://xml.org/sax/features/validation", true);
        saxParser.setFeature("http://apache.org/xml/features/validation/schema", true);
        saxParser.setFeature("http://apache.org/xml/features/validation/schema-full-checking", true);

        saxParser.setProperty("http://apache.org/xml/properties/schema/external-noNamespaceSchemaLocation",
            TEST.NAMESPACE);

        saxParser.setProperty("http://apache.org/xml/properties/schema/external-schemaLocation",
            TEST.NAMESPACE + " " + configuration.getSchemaFileURL());

        final ArrayList errors = new ArrayList();
        DefaultHandler handler = new DefaultHandler() {
                public void error(SAXParseException e)
                    throws SAXException {
                    System.out.println(e.getMessage());
                    errors.add(e);
                }

                public void fatalError(SAXParseException e)
                    throws SAXException {
                    System.out.println(e.getMessage());
                    errors.add(e);
                }
            };

        saxParser.setErrorHandler(handler);
        saxParser.parse(new InputSource(new ByteArrayInputStream(output.toByteArray())));

        assertTrue(errors.isEmpty());
    }
    
    public void testEncodeFeatureWithBounds() throws Exception {
        SimpleFeature feature = GML3MockData.feature();
        TestConfiguration configuration  = new TestConfiguration();
        //configuration.getProperties().add( org.geotools.gml2.GMLConfiguration.NO_FEATURE_BOUNDS );
    
        Encoder encoder = new Encoder( configuration );
        Document dom = encoder.encodeAsDOM(feature, TEST.TestFeature );
        
        assertEquals( 1, dom.getElementsByTagName("gml:boundedBy").getLength());
    }
    
    public void testEncodeFeatureWithNoBounds() throws Exception {
        SimpleFeature feature = GML3MockData.feature();
        TestConfiguration configuration  = new TestConfiguration();
        configuration.getProperties().add( org.geotools.gml2.GMLConfiguration.NO_FEATURE_BOUNDS );
    
        Encoder encoder = new Encoder( configuration );
        Document dom = encoder.encodeAsDOM(feature, TEST.TestFeature );
        
        assertEquals( 0, dom.getElementsByTagName("gml:boundedBy").getLength());
    }

    public void testEncodeWithNoSrsDimension() throws Exception {
        GMLConfiguration gml = new GMLConfiguration();
        Document dom = new Encoder(gml).encodeAsDOM(GML3MockData.point(), GML.Point);
        assertTrue(dom.getDocumentElement().hasAttribute("srsDimension"));

        gml.getProperties().add(GMLConfiguration.NO_SRS_DIMENSION);
        dom = new Encoder(gml).encodeAsDOM(GML3MockData.point(), GML.Point);
        assertFalse(dom.getDocumentElement().hasAttribute("srsDimension"));
    }

    public void testEncodeSrsSyntax() throws Exception {
        GMLConfiguration gml = new GMLConfiguration();
        Document dom = new Encoder(gml).encodeAsDOM(GML3MockData.point(), GML.Point);
        assertTrue(dom.getDocumentElement().getAttribute("srsName")
            .startsWith("urn:x-ogc:def:crs:EPSG:"));

        gml.setSrsSyntax(SrsSyntax.OGC_URN);
        dom = new Encoder(gml).encodeAsDOM(GML3MockData.point(), GML.Point);
        assertTrue(dom.getDocumentElement().getAttribute("srsName")
            .startsWith("urn:ogc:def:crs:EPSG::"));

        gml.setSrsSyntax(SrsSyntax.OGC_HTTP_URI);
        dom = new Encoder(gml).encodeAsDOM(GML3MockData.point(), GML.Point);
        assertTrue(dom.getDocumentElement().getAttribute("srsName")
            .startsWith("http://www.opengis.net/def/crs/EPSG/0/"));
    }
}