package eu.dnetlib.goldoa.service.utils;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import eu.dnetlib.goldoa.domain.Affiliation;
import eu.dnetlib.goldoa.domain.ManagerException;
import eu.dnetlib.goldoa.domain.Publication;
import eu.dnetlib.goldoa.domain.PublicationIdentifier;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.stereotype.Component;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;

/**
 * Created by antleb on 3/7/16.
 */
@Component(value = "openaireClient")
public class OpenAIREClient {

	private DocumentBuilder documentBuilder;
	private XPath xPath = XPathFactory.newInstance().newXPath();

	public OpenAIREClient() throws ParserConfigurationException {
		documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
	}

	public Publication findPublication(String title) {
		Publication publication = new Publication();

		InputStream is = null;

		try {
			is = new URL("http://api.openaire.eu/search/publications?title=" + title).openStream();
			Document doc = documentBuilder.parse(is);

			String docTitle = xPath.compile("/response//result//title").evaluate(doc);

		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (XPathExpressionException e) {
			e.printStackTrace();
		} finally {
			try {
				if (is != null)
					is.close();
			} catch (Exception e) {
			}
		}

		return publication;
	}
}