/**
 * Copyright © 2011 Instituto Superior Técnico
 *
 * This file is part of FenixEdu Teacher Credits.
 *
 * FenixEdu Teacher Credits 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, either version 3 of the License, or
 * (at your option) any later version.
 *
 * FenixEdu Teacher Credits 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.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with FenixEdu Teacher Credits.  If not, see <http://www.gnu.org/licenses/>.
 */
package pt.ist.fenixedu.teacher.dto.externalServices;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.WebTarget;

import org.apache.commons.lang.StringUtils;
import org.fenixedu.academic.domain.Teacher;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TeacherPublicationsInformation implements Serializable {

    private static final Logger logger = LoggerFactory.getLogger(TeacherPublicationsInformation.class);

    private static final String BASE_URL = "https://sotis.tecnico.ulisboa.pt/";

    private static final String CURRICULUM_PATH = "api/sotis-core/curriculum/a3es";

    public static Map<Teacher, List<String>> getTeacherPublicationsInformations(Set<Teacher> teachers) {
        Map<Teacher, List<String>> teacherPublicationsInformationMap = new HashMap<Teacher, List<String>>();

        Client client = ClientBuilder.newClient();
        WebTarget resource = client.target(BASE_URL);
        List<String> teacherIds = new ArrayList<String>();

        for (Teacher teacher : teachers) {
            teacherIds.add(teacher.getTeacherId());
        }

        resource = resource.path(CURRICULUM_PATH).queryParam("istids", StringUtils.join(teacherIds, ","));
        try {
            String allPublications = resource.request().get(String.class);
            JSONParser parser = new JSONParser();
            for (Object teacherPublications : (JSONArray) parser.parse(allPublications)) {
                JSONObject teacherPublicationsInfo = (JSONObject) teacherPublications;
                final String username = (String) teacherPublicationsInfo.get("istID");
                final Teacher teacher = Teacher.readByIstId(username);
                JSONArray preferredPublications = (JSONArray) teacherPublicationsInfo.get("preferred");

                List<String> teacherPublicationsList = new ArrayList<String>();
                for (Object publication : preferredPublications) {
                    teacherPublicationsList.add(publication.toString());
                }

                teacherPublicationsInformationMap.put(teacher, teacherPublicationsList);
            }
        } catch (ParseException e) {
            logger.error(e.getMessage(), e);
        } finally {
            client.close();
        }

        return teacherPublicationsInformationMap;
    }
}