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

import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

import net.sourceforge.fenixedu.applicationTier.FenixService;
import net.sourceforge.fenixedu.dataTransferObject.InfoExecutionDegreeEditor;
import net.sourceforge.fenixedu.dataTransferObject.InfoPeriod;
import net.sourceforge.fenixedu.domain.ExecutionDegree;
import net.sourceforge.fenixedu.domain.OccupationPeriod;
import pt.ist.fenixWebFramework.security.accessControl.Checked;
import pt.ist.fenixWebFramework.services.Service;

public class EditExecutionDegreePeriods extends FenixService {

    @Checked("RolePredicates.MANAGER_PREDICATE")
    @Service
    public static void run(InfoExecutionDegreeEditor infoExecutionDegree) {

	final ExecutionDegree oldExecutionDegree = rootDomainObject.readExecutionDegreeByOID(infoExecutionDegree.getIdInternal());

	OccupationPeriod periodLessonsFirstSemester = setCompositePeriod(infoExecutionDegree.getInfoPeriodLessonsFirstSemester());
	oldExecutionDegree.setPeriodLessonsFirstSemester(periodLessonsFirstSemester);

	OccupationPeriod periodLessonsSecondSemester = setCompositePeriod(infoExecutionDegree
		.getInfoPeriodLessonsSecondSemester());
	oldExecutionDegree.setPeriodLessonsSecondSemester(periodLessonsSecondSemester);

	OccupationPeriod periodExamsFirstSemester = setCompositePeriod(infoExecutionDegree.getInfoPeriodExamsFirstSemester());
	oldExecutionDegree.setPeriodExamsFirstSemester(periodExamsFirstSemester);

	OccupationPeriod periodExamsSecondSemester = setCompositePeriod(infoExecutionDegree.getInfoPeriodExamsSecondSemester());
	oldExecutionDegree.setPeriodExamsSecondSemester(periodExamsSecondSemester);
    }

    // retorna o primeiro period do executiondegree
    private static OccupationPeriod setCompositePeriod(InfoPeriod infoPeriod) {
	List<InfoPeriod> infoPeriodList = new ArrayList<InfoPeriod>();

	infoPeriodList.add(infoPeriod);
	while (infoPeriod.getNextPeriod() != null) {
	    infoPeriodList.add(infoPeriod.getNextPeriod());
	    infoPeriod = infoPeriod.getNextPeriod();
	}

	int infoPeriodListSize = infoPeriodList.size();
	InfoPeriod infoPeriodNew = infoPeriodList.get(infoPeriodListSize - 1);

	OccupationPeriod period = OccupationPeriod.readByDates(infoPeriodNew.getStartDate().getTime(), infoPeriodNew.getEndDate()
		.getTime());
	if (period == null) {
	    Calendar startDate = infoPeriodNew.getStartDate();
	    Calendar endDate = infoPeriodNew.getEndDate();
	    period = new OccupationPeriod(startDate.getTime(), endDate.getTime());
	}

	for (int i = infoPeriodListSize - 2; i >= 0; i--) {
	    infoPeriodNew = infoPeriodList.get(i);

	    OccupationPeriod nextPeriod = period;
	    period = OccupationPeriod.readByDates(infoPeriodNew.getStartDate().getTime(), infoPeriodNew.getEndDate().getTime());
	    if (period == null) {
		Calendar startDate = infoPeriodNew.getStartDate();
		Calendar endDate = infoPeriodNew.getEndDate();
		period = new OccupationPeriod(startDate.getTime(), endDate.getTime());
		period.setNextPeriod(nextPeriod);
	    }
	}

	return period;
    }

}