package eu.dnetlib.doiboost.orcid.xml;

import java.util.Arrays;
import java.util.List;

import org.mortbay.log.Log;

import com.ximpleware.AutoPilot;
import com.ximpleware.EOFException;
import com.ximpleware.EncodingException;
import com.ximpleware.EntityException;
import com.ximpleware.ParseException;
import com.ximpleware.VTDGen;
import com.ximpleware.VTDNav;

import eu.dnetlib.dhp.parser.utility.VtdException;
import eu.dnetlib.dhp.parser.utility.VtdUtilityParser;
import eu.dnetlib.dhp.schema.orcid.AuthorData;
import eu.dnetlib.doiboost.orcid.model.WorkData;

public class XMLRecordParser {

	private static final String NS_COMMON_URL = "http://www.orcid.org/ns/common";
	private static final String NS_COMMON = "common";
	private static final String NS_PERSON_URL = "http://www.orcid.org/ns/person";
	private static final String NS_PERSON = "person";
	private static final String NS_DETAILS_URL = "http://www.orcid.org/ns/personal-details";
	private static final String NS_DETAILS = "personal-details";
	private static final String NS_OTHER_URL = "http://www.orcid.org/ns/other-name";
	private static final String NS_OTHER = "other-name";
	private static final String NS_RECORD_URL = "http://www.orcid.org/ns/record";
	private static final String NS_RECORD = "record";
	private static final String NS_ERROR_URL = "http://www.orcid.org/ns/error";

	private static final String NS_WORK = "work";
	private static final String NS_WORK_URL = "http://www.orcid.org/ns/work";

	private static final String NS_ERROR = "error";

	public static AuthorData VTDParseAuthorData(byte[] bytes)
		throws VtdException, EncodingException, EOFException, EntityException, ParseException {
		final VTDGen vg = new VTDGen();
		vg.setDoc(bytes);
		vg.parse(true);
		final VTDNav vn = vg.getNav();
		final AutoPilot ap = new AutoPilot(vn);
		ap.declareXPathNameSpace(NS_COMMON, NS_COMMON_URL);
		ap.declareXPathNameSpace(NS_PERSON, NS_PERSON_URL);
		ap.declareXPathNameSpace(NS_DETAILS, NS_DETAILS_URL);
		ap.declareXPathNameSpace(NS_OTHER, NS_OTHER_URL);
		ap.declareXPathNameSpace(NS_RECORD, NS_RECORD_URL);
		ap.declareXPathNameSpace(NS_ERROR, NS_ERROR_URL);

		AuthorData authorData = new AuthorData();
		final List<String> errors = VtdUtilityParser.getTextValue(ap, vn, "//error:response-code");
		if (!errors.isEmpty()) {
			authorData.setErrorCode(errors.get(0));
			return authorData;
		}

		List<VtdUtilityParser.Node> recordNodes = VtdUtilityParser
			.getTextValuesWithAttributes(
				ap, vn, "//record:record", Arrays.asList("path"));
		if (!recordNodes.isEmpty()) {
			final String oid = (recordNodes.get(0).getAttributes().get("path")).substring(1);
			authorData.setOid(oid);
		} else {
			return null;
		}

		final List<String> names = VtdUtilityParser.getTextValue(ap, vn, "//personal-details:given-names");
		if (!names.isEmpty()) {
			authorData.setName(names.get(0));
		}

		final List<String> surnames = VtdUtilityParser.getTextValue(ap, vn, "//personal-details:family-name");
		if (!surnames.isEmpty()) {
			authorData.setSurname(surnames.get(0));
		}

		final List<String> creditNames = VtdUtilityParser.getTextValue(ap, vn, "//personal-details:credit-name");
		if (!creditNames.isEmpty()) {
			authorData.setCreditName(creditNames.get(0));
		}

		final List<String> otherNames = VtdUtilityParser.getTextValue(ap, vn, "//other-name:content");
		if (!otherNames.isEmpty()) {
			authorData.setOtherNames(otherNames);
		}

		return authorData;
	}

	public static WorkData VTDParseWorkData(byte[] bytes)
		throws VtdException, EncodingException, EOFException, EntityException, ParseException {
		final VTDGen vg = new VTDGen();
		vg.setDoc(bytes);
		vg.parse(true);
		final VTDNav vn = vg.getNav();
		final AutoPilot ap = new AutoPilot(vn);
		ap.declareXPathNameSpace(NS_COMMON, NS_COMMON_URL);
		ap.declareXPathNameSpace(NS_WORK, NS_WORK_URL);
		ap.declareXPathNameSpace(NS_ERROR, NS_ERROR_URL);

		WorkData workData = new WorkData();
		final List<String> errors = VtdUtilityParser.getTextValue(ap, vn, "//error:response-code");
		if (!errors.isEmpty()) {
			workData.setErrorCode(errors.get(0));
			return workData;
		}

		List<VtdUtilityParser.Node> workNodes = VtdUtilityParser
			.getTextValuesWithAttributes(ap, vn, "//work:work", Arrays.asList("path"));
		if (!workNodes.isEmpty()) {
			final String oid = (workNodes.get(0).getAttributes().get("path")).split("/")[1];
			workData.setOid(oid);
		} else {
			return null;
		}

		final List<String> dois = VtdUtilityParser
			.getTextValue(
				ap, vn, "//common:external-id-type[text()=\"doi\"]/../common:external-id-value");
		if (!dois.isEmpty()) {
			workData.setDoi(dois.get(0));
			workData.setDoiFound(true);
		}
		return workData;
	}

	public static String retrieveOrcidIdFromSummary(byte[] bytes, String defaultValue)
		throws VtdException, ParseException {
		return retrieveOrcidId(bytes, defaultValue, NS_RECORD, NS_RECORD_URL, "//record:record", "path").substring(1);
	}

	public static String retrieveOrcidIdFromActivity(byte[] bytes, String defaultValue)
		throws VtdException, ParseException {
		return retrieveOrcidId(bytes, defaultValue, NS_WORK, NS_WORK_URL, "//work:work", "put-code");
	}

	private static String retrieveOrcidId(byte[] bytes, String defaultValue, String ns, String nsUrl, String xpath,
		String idAttributeName)
		throws VtdException, ParseException {
		final VTDGen vg = new VTDGen();
		vg.setDoc(bytes);
		vg.parse(true);
		final VTDNav vn = vg.getNav();
		final AutoPilot ap = new AutoPilot(vn);
		ap.declareXPathNameSpace(ns, nsUrl);
		List<VtdUtilityParser.Node> recordNodes = VtdUtilityParser
			.getTextValuesWithAttributes(
				ap, vn, xpath, Arrays.asList(idAttributeName));
		if (!recordNodes.isEmpty()) {
			return (recordNodes.get(0).getAttributes().get(idAttributeName));
		}
		Log.info("id not found - default: " + defaultValue);
		return defaultValue;
	}
}