/*******************************************************************************
 * Australian National University Data Commons
 * Copyright (C) 2013  The Australian National University
 * 
 * This file is part of Australian National University Data Commons.
 * 
 * Australian National University Data Commons 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 au.edu.anu.datacommons.doi;

import static org.junit.Assert.*;

import java.io.InputStream;
import java.io.StringWriter;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

import org.apache.commons.io.IOUtils;
import org.datacite.schema.kernel_2.Resource;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import au.edu.anu.datacommons.xml.data.Data;

public class DoiResourceAdapterTest {
	private static final Logger LOGGER = LoggerFactory.getLogger(DoiResourceAdapterTest.class);

	private static JAXBContext dataContext;
	private static JAXBContext resourceContext;
	
	private Marshaller resourceMarshaller;
	private Unmarshaller dataUnmarshaller;

	@BeforeClass
	public static void setUpBeforeClass() throws Exception {
		dataContext = JAXBContext.newInstance(Data.class);
		resourceContext = JAXBContext.newInstance(Resource.class);
	}

	@AfterClass
	public static void tearDownAfterClass() throws Exception {
	}

	@Before
	public void setUp() throws Exception {
		resourceMarshaller = resourceContext.createMarshaller();
		resourceMarshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
		dataUnmarshaller = dataContext.createUnmarshaller();
	}

	@After
	public void tearDown() throws Exception {
	}

	@Test
	public void testDataResourceAdapter() {
		DoiResourceAdapter adapter;
		try {
			adapter = new DoiResourceAdapter(getData("sampleFedoraDSFull.xml"));
			Resource doiRes = adapter.createDoiResource();

			assertNotNull(doiRes);

			// Titles
			assertNotNull(doiRes.getTitles());
			assertNotNull(doiRes.getTitles().getTitle());
			assertEquals(2, doiRes.getTitles().getTitle().size());

			// Creators
			assertNotNull(doiRes.getCreators());
			assertNotNull(doiRes.getCreators().getCreator());
			assertEquals(2, doiRes.getCreators().getCreator().size());

			// Publisher
			assertEquals(doiRes.getPublisher(), "The Australian National University Data Commons");
			// Publication Year
			assertEquals(doiRes.getPublicationYear(), "2013");

			LOGGER.trace(getResourceXmlAsString(doiRes));
		} catch (JAXBException e) {
			failOnException(e);
		} catch (DoiException e) {
			failOnException(e);
		}
	}

	private Data getData(String filename) throws JAXBException {
		Data data;
		InputStream dataStream = null;
		try {
			dataStream = DoiResourceAdapterTest.class.getResourceAsStream(filename);
			data = (Data) dataUnmarshaller.unmarshal(dataStream);
		} finally {
			IOUtils.closeQuietly(dataStream);
		}
		return data;
	}
	
	private String getResourceXmlAsString(Object object) {
		StringWriter writer = new StringWriter();
		try {
			resourceMarshaller.marshal(object, writer);
		} catch (JAXBException e) {
			failOnException(e);
		}
		return writer.toString();
	}

	private void failOnException(Throwable e) {
		LOGGER.error(e.getMessage(), e);
		fail(e.getMessage());
	}
}