package net.sourceforge.fenixedu.applicationTier.Servico.teacher;

import java.util.ArrayList;
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.applicationTier.Servico.exceptions.InvalidArgumentsServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.InvalidChangeServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.InvalidSituationServiceException;
import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.NonValidChangeServiceException;
import net.sourceforge.fenixedu.domain.Grouping;
import net.sourceforge.fenixedu.domain.Shift;
import net.sourceforge.fenixedu.domain.StudentGroup;

public class EditStudentGroupsShift extends FenixService {

    public Boolean run(Integer executionCourseCode, Integer groupPropertiesCode, Integer shiftCode,
	    List<Integer> studentGroupsCodes) throws FenixServiceException {

	Grouping grouping = rootDomainObject.readGroupingByOID(groupPropertiesCode);
	if (grouping == null) {
	    throw new ExistingServiceException();
	}

	Shift shift = rootDomainObject.readShiftByOID(shiftCode);
	if (shift == null) {
	    throw new InvalidChangeServiceException();
	}

	// grouping.checkShiftCapacity(shift);
	if (grouping.getShiftType() == null || !shift.containsType(grouping.getShiftType())) {
	    throw new NonValidChangeServiceException();
	}

	List<StudentGroup> studentGroups = buildStudentGroupsList(studentGroupsCodes);
	for (StudentGroup studentGroup : studentGroups) {
	    if (!studentGroup.getGrouping().equals(grouping)) {
		throw new InvalidArgumentsServiceException();
	    }
	}

	for (StudentGroup studentGroup : studentGroups) {
	    studentGroup.editShift(shift);
	}

	return Boolean.TRUE;
    }

    private List<StudentGroup> buildStudentGroupsList(List<Integer> studentGroupsCodes) throws InvalidSituationServiceException {

	List<StudentGroup> studentGroups = new ArrayList<StudentGroup>();

	for (Integer studentGroupCode : studentGroupsCodes) {
	    StudentGroup studentGroup = rootDomainObject.readStudentGroupByOID(studentGroupCode);

	    if (studentGroup == null) {
		throw new InvalidSituationServiceException("error.studentGroupNotInList");
	    }

	    studentGroups.add(studentGroup);
	}

	return studentGroups;
    }

}