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/**
 * Copyright (C) cedarsoft GmbH.
 *
 * Licensed under the GNU General Public License version 3 (the "License")
 * with Classpath Exception; you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *         http://www.cedarsoft.org/gpl3ce
 *         (GPL 3 with Classpath Exception)
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 3 only, as
 * published by the Free Software Foundation. cedarsoft GmbH designates this
 * particular file as subject to the "Classpath" exception as provided
 * by cedarsoft GmbH in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 3 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 3 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact cedarsoft GmbH, 72810 Gomaringen, Germany,
 * or visit www.cedarsoft.com if you need additional information or
 * have any questions.
 */

package com.cedarsoft.serialization.test.utils;

import com.cedarsoft.serialization.AbstractXmlSerializer;
import com.cedarsoft.serialization.StreamSerializer;
import com.cedarsoft.test.utils.AssertUtils;
import com.cedarsoft.xml.XmlCommons;
import org.apache.commons.io.Charsets;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;

import javax.annotation.Nonnull;
import java.io.IOException;
import java.io.StringWriter;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;

/**
 * Abstract base class for XML based serializers.
 * 
 * 

 * Attention: it is necessary to define at least one DataPoint:
 * 

 * 
@DataPoint
public static final Entry<?> ENTRY1 = create(
 new DomainObject(),
 "<xml/>" );
 *
 * @param  the type of the serialized object
 */
public abstract class AbstractXmlSerializerTest2 extends AbstractSerializerTest2 {
  @Nonnull
  @Override
  protected abstract StreamSerializer getSerializer() throws Exception;

  protected void verify( @Nonnull byte[] current, @Nonnull byte[] expectedXml ) throws Exception {
    if ( addNameSpace() ) {
      String expectedWithNamespace;
      try {
        expectedWithNamespace = addNameSpace( ( AbstractXmlSerializer ) getSerializer(), expectedXml );
      } catch ( SAXException ignore ) {
        expectedWithNamespace = new String( expectedXml, StandardCharsets.UTF_8 );
      }
      AssertUtils.assertXMLEquals( expectedWithNamespace, new String( current, getEncoding() ) );
    } else {
      AssertUtils.assertXMLEquals( new String( expectedXml, StandardCharsets.UTF_8 ), new String( current, getEncoding() ) );
    }
  }

  @Nonnull
  protected Charset getEncoding() {
    return StandardCharsets.UTF_8;
  }

  @Override
  protected void verifySerialized( @Nonnull Entry entry, @Nonnull byte[] serialized ) throws Exception {
    verify( serialized, entry.getExpected() );
  }

  protected boolean addNameSpace() {
    return true;
  }

  @Nonnull
  public static String addNameSpace( @Nonnull AbstractXmlSerializer serializer, @Nonnull byte[] xmlBytes ) throws Exception {
    return addNameSpace( serializer.createNameSpace( serializer.getFormatVersion() ), xmlBytes );
  }

  @Nonnull
  public static String addNameSpace( @Nonnull String nameSpaceUri, @Nonnull byte[] xml ) throws IOException, SAXException {
    Document document = XmlCommons.parse( xml );

    new XmlNamespaceTranslator()
        .addTranslation( null, nameSpaceUri )
        .translateNamespaces( document, false );

    StringWriter out = new StringWriter();
    XmlCommons.out( document, out );
    return out.toString();
  }

  @Nonnull
  protected static  Entry create( @Nonnull T object, @Nonnull String expected ) {
    return new Entry( object, expected.getBytes(StandardCharsets.UTF_8) );
  }
}