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package pt.estgp.estgweb.web.json;
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package pt.estgp.estgweb.web.json;
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import com.owlike.genson.TransformationException;
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import jomm.dao.impl.AbstractDao;
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import org.apache.log4j.Logger;
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import org.json.JSONArray;
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import org.json.JSONException;
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import org.json.JSONObject;
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import pt.estgp.estgweb.domain.UserSession;
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import pt.estgp.estgweb.services.courses.CoursesService;
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import pt.estgp.estgweb.services.courses.xsd.Curso;
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import pt.estgp.estgweb.web.UserSessionProxy;
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import javax.servlet.ServletException;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpServletResponse;
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import javax.xml.bind.JAXBContext;
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import javax.xml.bind.JAXBException;
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import javax.xml.bind.Marshaller;
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import javax.xml.bind.Unmarshaller;
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import java.io.IOException;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.io.StringReader;
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/**
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/**
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 * Created by jorgemachado on 02/02/16.
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 * Created by jorgemachado on 02/02/16.
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 */
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 */
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public class JsonHandler extends HttpServlet
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public class JsonHandler extends HttpServlet
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{
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{
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    private static final 1.5.0/docs/api/java/util/logging/Logger.html">Logger logger = 1.5.0/docs/api/java/util/logging/Logger.html">Logger.getLogger(JsonHandler.class);
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    /** Handles the HTTP <code>GET</code> method.
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    /** Handles the HTTP <code>GET</code> method.
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     * @param request servlet request
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     * @param request servlet request
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     * @param response servlet response
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     * @param response servlet response
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     */
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     */
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    protected void doGet(HttpServletRequest request, HttpServletResponse response)
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    protected void doGet(HttpServletRequest request, HttpServletResponse response)
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            throws ServletException, 1.5.0/docs/api/java/io/IOException.html">IOException
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            throws ServletException, 1.5.0/docs/api/java/io/IOException.html">IOException {
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    {
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        processRequest(request, response);
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        processRequestSafe(request, response);
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    }
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    }
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    /** Handles the HTTP <code>POST</code> method.
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    /** Handles the HTTP <code>POST</code> method.
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     * @param request servlet request
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     * @param request servlet request
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     * @param response servlet response
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     * @param response servlet response
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     */
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     */
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    protected void doPost(HttpServletRequest request, HttpServletResponse response)
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    protected void doPost(HttpServletRequest request, HttpServletResponse response)
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            throws ServletException, 1.5.0/docs/api/java/io/IOException.html">IOException {
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            throws ServletException, 1.5.0/docs/api/java/io/IOException.html">IOException {
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        processRequest(request, response);
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        processRequestSafe(request, response);
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    }
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    }
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    private void processRequest(HttpServletRequest request, HttpServletResponse response) {
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    private void processRequestSafe(HttpServletRequest request, HttpServletResponse response) throws 1.5.0/docs/api/java/io/IOException.html">IOException {
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        response.setContentType("application/json");
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        try {
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            processRequest(request, response);
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        } catch (TransformationException e)
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        {
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            response.getWriter().print(e);
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            response.getWriter().print("See log for details:");
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            logger.error(e,e);
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        }
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        catch (JAXBException e)
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        {
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            response.getWriter().print(e);
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            response.getWriter().print("See log for details:");
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            logger.error(e,e);
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        }
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        catch (JSONException e)
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        {
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            response.getWriter().print(e);
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            response.getWriter().print("See log for details:");
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            logger.error(e, e);
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        }
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    }
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    }
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    private void processRequest(HttpServletRequest request, HttpServletResponse response) throws 1.5.0/docs/api/java/io/IOException.html">IOException, TransformationException, JAXBException, JSONException {
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        1.5.0/docs/api/java/lang/String.html">String service = request.getParameter("service");
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        if(service == null)
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        {
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            printServices(response.getWriter());
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        }
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        else if(service.equals("listCourses"))
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        {
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            1.5.0/docs/api/java/lang/String.html">String school = request.getParameter("school");
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            1.5.0/docs/api/java/lang/String.html">String type = request.getParameter("type");
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            AbstractDao.getCurrentSession().beginTransaction();
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            JSONObject obj = new CoursesService().getActiveCoursesForJsonApi(school,type);
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            AbstractDao.getCurrentSession().getTransaction().commit();
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            response.getWriter().write(obj.toString());
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        }
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        else if(service.equals("getCourse") && request.getParameter("code") != null)
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        {
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            1.5.0/docs/api/java/lang/String.html">String code = request.getParameter("code");
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            AbstractDao.getCurrentSession().beginTransaction();
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            JSONObject obj = new CoursesService().getCourseDetailForJsonApi(code);
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            AbstractDao.getCurrentSession().getTransaction().commit();
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            response.getWriter().write(obj.toString());
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        }
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        else if(service.equals("getStudiesPlanXml") && request.getParameter("code") != null)
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        {
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            1.5.0/docs/api/java/lang/String.html">String code = request.getParameter("code");
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            response.setContentType("application/xml");
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            response.setCharacterEncoding("UTF-8");
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            AbstractDao.getCurrentSession().beginTransaction();
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            1.5.0/docs/api/java/lang/String.html">String xml = new CoursesService().getCourseStudiesPlanXml(code);
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            JAXBContext jc = JAXBContext.newInstance(Curso.class);
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            Unmarshaller unmarshaller = jc.createUnmarshaller();
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            Curso curso = (Curso) unmarshaller.unmarshal(new 1.5.0/docs/api/java/io/StringReader.html">StringReader(xml));
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            Marshaller marshaller = jc.createMarshaller();
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            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
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            marshaller.marshal(curso, response.getOutputStream());
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            //SETTING XML in COURSE STUDIES PLAN
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            AbstractDao.getCurrentSession().getTransaction().commit();
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        }
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        else if(service.equals("syncSystemPlans") && request.getParameter("systemUrl") != null && request.getParameter("setActive") != null)
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        {
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            UserSession sess = UserSessionProxy.loadUserSessionFromRequest(request);
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            response.setContentType("application/xml");
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            if(sess.getUser() != null && sess.getUser().isSuperuserOrAdmin())
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            {
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                1.5.0/docs/api/java/lang/String.html">String systemUrl = request.getParameter("systemUrl");
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                boolean setActive = 1.5.0/docs/api/java/lang/Boolean.html">Boolean.parseBoolean(request.getParameter("setActive"));
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                response.setContentType("application/xml");
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                AbstractDao.getCurrentSession().beginTransaction();
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                1.5.0/docs/api/java/lang/String.html">String log = new CoursesService().sincronizeCoursesStudiesPlans(systemUrl,setActive);
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                AbstractDao.getCurrentSession().getTransaction().commit();
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                response.getWriter().write("<response><status>OK</status><log>" + log + "</log></response>");
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            }
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            else
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            {
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                response.getWriter().write("<error>Permission Denied</error>");
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            }
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        }
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        else
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        {
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            printServices(response.getWriter());
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        }
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    }
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    public void printServices(1.5.0/docs/api/java/io/PrintWriter.html">PrintWriter out) throws JSONException, 1.5.0/docs/api/java/io/IOException.html">IOException
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    {
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        JSONObject obj = new JSONObject();
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        JSONArray availableServices = new JSONArray();
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        JSONObject service2 = new JSONObject();
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        service2.put("name","getCourse");
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        service2.put("parameterCode","code");
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        service2.put("parameterCodeType","integer");
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        service2.put("exampleCall1","/wsjson/api?service=getCourse&code=9119");
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        JSONObject service = new JSONObject();
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        service.put("name","listCourses");
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        service.put("parameterType","type");
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        service.put("parameterTypeEnumValues","Licenciaturas,Mestrados,PosGraduacoes,CET,CTeSP or none for all");
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        service.put("parameterSchool","school");
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        service.put("parameterSchoolEnumValues","ESTG,ESECS,ESS,ESAE or none for all");
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        service.put("exampleCall1","/wsjson/api?service=listCourses");
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        service.put("exampleCall2","/wsjson/api?service=listCourses&type=Licenciaturas&school=ESTG");
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        availableServices.put(service);
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        availableServices.put(service2);
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        JSONObject response = new JSONObject();
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        obj.put("response",response);
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        response.put("status","invalid service");
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        response.put("availableServices",availableServices);
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        out.write(obj.toString());
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    }
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}
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}