/*
 * Created on 8/Jan/2005
 *
 */
package net.sourceforge.fenixedu.applicationTier.Servico.publico;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import net.sourceforge.fenixedu.applicationTier.FenixService;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.ExistingServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.dataTransferObject.InfoGrouping;
import net.sourceforge.fenixedu.dataTransferObject.InfoSiteStudentAndGroup;
import net.sourceforge.fenixedu.dataTransferObject.InfoSiteStudentInformation;
import net.sourceforge.fenixedu.dataTransferObject.InfoSiteStudentsAndGroups;
import net.sourceforge.fenixedu.dataTransferObject.InfoStudentGroup;
import net.sourceforge.fenixedu.domain.Attends;
import net.sourceforge.fenixedu.domain.Grouping;
import net.sourceforge.fenixedu.domain.StudentGroup;

import org.apache.commons.beanutils.BeanComparator;

import pt.ist.fenixWebFramework.services.Service;

/**
 * @author joaosa & rmalo
 * 
 */
public class ReadAllStudentsAndGroups extends FenixService {

    @Service
    public static InfoSiteStudentsAndGroups run(Integer groupingId) throws FenixServiceException {
	InfoSiteStudentsAndGroups infoSiteStudentsAndGroups = new InfoSiteStudentsAndGroups();

	Grouping grouping = rootDomainObject.readGroupingByOID(groupingId);

	if (grouping == null) {
	    throw new ExistingServiceException();
	}

	List infoSiteStudentsAndGroupsList = new ArrayList();
	List studentGroups = getAllStudentGroups(grouping);
	Iterator iterStudentGroups = studentGroups.iterator();
	while (iterStudentGroups.hasNext()) {

	    List studentGroupAttendList = new ArrayList();
	    StudentGroup studentGroup = (StudentGroup) iterStudentGroups.next();

	    studentGroupAttendList = studentGroup.getAttends();

	    Iterator iterStudentGroupAttendList = studentGroupAttendList.iterator();
	    InfoSiteStudentInformation infoSiteStudentInformation = null;
	    InfoSiteStudentAndGroup infoSiteStudentAndGroup = null;
	    Attends attend = null;

	    while (iterStudentGroupAttendList.hasNext()) {
		infoSiteStudentInformation = new InfoSiteStudentInformation();
		infoSiteStudentAndGroup = new InfoSiteStudentAndGroup();

		attend = (Attends) iterStudentGroupAttendList.next();

		infoSiteStudentAndGroup.setInfoStudentGroup(InfoStudentGroup.newInfoFromDomain(studentGroup));

		infoSiteStudentInformation.setNumber(attend.getRegistration().getNumber());

		infoSiteStudentInformation.setName(attend.getRegistration().getPerson().getName());

		infoSiteStudentInformation.setUsername((attend.getRegistration().getPerson().getUsername()));

		infoSiteStudentInformation.setEmail(attend.getRegistration().getPerson().getEmail());

		infoSiteStudentInformation.setPersonID(attend.getRegistration().getPerson().getIdInternal());

		infoSiteStudentAndGroup.setInfoSiteStudentInformation(infoSiteStudentInformation);

		infoSiteStudentsAndGroupsList.add(infoSiteStudentAndGroup);
	    }
	}

	Collections.sort(infoSiteStudentsAndGroupsList, new BeanComparator("infoSiteStudentInformation.number"));

	infoSiteStudentsAndGroups.setInfoSiteStudentsAndGroupsList(infoSiteStudentsAndGroupsList);
	infoSiteStudentsAndGroups.setInfoGrouping(InfoGrouping.newInfoFromDomain(grouping));

	return infoSiteStudentsAndGroups;
    }

    private static List getAllStudentGroups(Grouping groupProperties) {
	List result = new ArrayList();
	List studentGroups = groupProperties.getStudentGroups();
	result.addAll(studentGroups);
	return result;
    }
}