package net.sourceforge.fenixedu.domain.organizationalStructure;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;

import net.sourceforge.fenixedu.domain.CompetenceCourse;
import net.sourceforge.fenixedu.domain.CurricularCourse;
import net.sourceforge.fenixedu.domain.Degree;
import net.sourceforge.fenixedu.domain.Department;
import net.sourceforge.fenixedu.domain.ExecutionYear;
import net.sourceforge.fenixedu.domain.administrativeOffice.AdministrativeOffice;
import net.sourceforge.fenixedu.domain.exceptions.DomainException;
import net.sourceforge.fenixedu.domain.space.Campus;

import org.joda.time.YearMonthDay;

import pt.iscte.ci.metadata.ISCTE;
import pt.ist.fenixWebFramework.services.Service;
import pt.utl.ist.fenix.tools.util.i18n.MultiLanguageString;

public class CompetenceCourseGroupUnit extends CompetenceCourseGroupUnit_Base {

    private CompetenceCourseGroupUnit() {
	super();
	super.setType(PartyTypeEnum.COMPETENCE_COURSE_GROUP);
    }

    public static Unit createNewInternalCompetenceCourseGroupUnit(MultiLanguageString name, Integer costCenterCode,
	    String acronym, YearMonthDay beginDate, YearMonthDay endDate, Unit parentUnit, AccountabilityType accountabilityType,
	    String webAddress, UnitClassification classification, Boolean canBeResponsibleOfSpaces, Campus campus) {

	CompetenceCourseGroupUnit competenceCourseGroupUnit = new CompetenceCourseGroupUnit();
	competenceCourseGroupUnit.init(name, costCenterCode, acronym, beginDate, endDate, webAddress, classification,
		canBeResponsibleOfSpaces, campus);
	competenceCourseGroupUnit.addParentUnit(parentUnit, accountabilityType);

	checkIfAlreadyExistsOneCompetenceCourseGroupUnitWithSameAcronymAndName(competenceCourseGroupUnit);

	return competenceCourseGroupUnit;
    }

    @Override
    public void edit(MultiLanguageString unitName, Integer unitCostCenter, String acronym, YearMonthDay beginDate,
	    YearMonthDay endDate, String webAddress, UnitClassification classification, Department department, Degree degree,
	    AdministrativeOffice administrativeOffice, Boolean canBeResponsibleOfSpaces, Campus campus) {

	super.edit(unitName, unitCostCenter, acronym, beginDate, endDate, webAddress, classification, department, degree,
		administrativeOffice, canBeResponsibleOfSpaces, campus);

	checkIfAlreadyExistsOneCompetenceCourseGroupUnitWithSameAcronymAndName(this);
    }

    @Override
    public Accountability addParentUnit(Unit parentUnit, AccountabilityType accountabilityType) {
	if (parentUnit != null && (!parentUnit.isInternal() || !parentUnit.isScientificAreaUnit())) {
	    throw new DomainException("error.unit.invalid.parentUnit");
	}
	return super.addParentUnit(parentUnit, accountabilityType);
    }

    @Override
    public boolean isCompetenceCourseGroupUnit() {
	return true;
    }

    public List<CompetenceCourse> getCompetenceCourses() {
	final SortedSet<CompetenceCourse> result = new TreeSet<CompetenceCourse>(
		CompetenceCourse.COMPETENCE_COURSE_COMPARATOR_BY_NAME);
	for (CCGUContext ccguContext : getCCGUContexts()) {
	    result.add(ccguContext.getCompetenceCourse());
	}
	return new ArrayList<CompetenceCourse>(result);
    }

    // ISCTE - needed for listing Competence Courses in manager portal (pramc)
    public List<CompetenceCourse> getBolonhaCompetenceCourses() {
	final SortedSet<CompetenceCourse> result = new TreeSet<CompetenceCourse>(
		CompetenceCourse.COMPETENCE_COURSE_COMPARATOR_BY_NAME);

	for (CCGUContext ccguContext : getCCGUContexts()) {
	    CompetenceCourse competenceCourse = ccguContext.getCompetenceCourse();
	    if (competenceCourse.isBolonha()) {
		result.add(competenceCourse);
	    }
	}
	return new ArrayList<CompetenceCourse>(result);
    }

    public List<CompetenceCourse> getNotBolonhaCompetenceCourses() {
	final SortedSet<CompetenceCourse> result = new TreeSet<CompetenceCourse>(
		CompetenceCourse.COMPETENCE_COURSE_COMPARATOR_BY_NAME);

	for (CompetenceCourse course : getCompetenceCourses()) {
	    if (!course.isBolonha())
		result.add(course);
	}
	return new ArrayList<CompetenceCourse>(result);
    }

    public List<CompetenceCourse> getNotBolonhaOfficialCompetenceCourses() {
	final SortedSet<CompetenceCourse> result = new TreeSet<CompetenceCourse>(
		CompetenceCourse.COMPETENCE_COURSE_COMPARATOR_BY_NAME);

	for (CompetenceCourse course : getCompetenceCourses()) {
	    if (!course.isBolonha() && course.getIsOfficial())
		result.add(course);
	}
	return new ArrayList<CompetenceCourse>(result);
    }

    // end of ISCTE

    @Override
    public void setType(PartyTypeEnum partyTypeEnum) {
	throw new DomainException("unit.impossible.set.type");
    }

    public List<CurricularCourse> getCurricularCourses() {
	List<CompetenceCourse> competenceCourses = getCompetenceCourses();
	List<CurricularCourse> curricularCourses = new ArrayList<CurricularCourse>();

	for (CompetenceCourse competenceCourse : competenceCourses) {
	    curricularCourses.addAll(competenceCourse.getAssociatedCurricularCourses());
	}

	return curricularCourses;
    }

    @ISCTE(author = "Nadir Amin")
    public Set<CompetenceCourse> getCompetenceCoursesBy(ExecutionYear executionYear) {
	final Set<CompetenceCourse> result = new HashSet<CompetenceCourse>();

	for (final CCGUContext context : getCCGUContexts()) {
	    if (context.isValidOn(executionYear)) {
		result.add(context.getCompetenceCourse());
	    }
	}

	return result;
    }

    @Override
    public void delete() {
	if (getCompetenceCourses().size() > 0) {
	    throw new DomainException("error.unit.cannot.be.deleted");
	}
	super.delete();
    }

    private static void checkIfAlreadyExistsOneCompetenceCourseGroupUnitWithSameAcronymAndName(
	    CompetenceCourseGroupUnit competenceCourseGroupUnit) {
	for (Unit parentUnit : competenceCourseGroupUnit.getParentUnits()) {
	    for (Unit unit : parentUnit.getAllSubUnits()) {
		if (!unit.equals(competenceCourseGroupUnit)
			&& competenceCourseGroupUnit.getName().equalsIgnoreCase(unit.getName())) {
		    throw new DomainException("error.unit.already.exists.unit.with.same.name.or.acronym");
		}
	    }
	}
    }

    public CCGUContext getCurrentContext() {
	ExecutionYear currentExecutionYear = ExecutionYear.readCurrentExecutionYear();
	for (CCGUContext ccguContext : getCCGUContexts()) {
	    if (ccguContext.getBeginExecutionYear().isBefore(currentExecutionYear)
		    && (ccguContext.getEndExecutionYear() == null || ccguContext.getEndExecutionYear().isAfter(
			    currentExecutionYear)))
		return ccguContext;
	}
	return null;
    }

    public List<CCGUContext> getPreviousContexts() {
	List<CCGUContext> contexts = new ArrayList<CCGUContext>();
	for (CCGUContext ccguContext : getCCGUContexts()) {
	    if (ccguContext.getEndExecutionYear() != null)
		contexts.add(ccguContext);
	}
	return contexts;
    }

    @Service
    public void copyCompetenceCourses(final ScientificAreaUnit scientificAreaUnit, final ExecutionYear beginExecutionYear,
	    final ExecutionYear endExecutionYear) {

	if (scientificAreaUnit == null) {
	    throw new DomainException("error.CopyCompetenceCourse.scientificAreaUnit.cannotBeNull");
	}
	final CompetenceCourseGroupUnit destinyCompetenceCourseGroupUnit = scientificAreaUnit.getCompetenceCourseGroupUnits()
		.get(0);

	for (final CompetenceCourse competenceCourse : getCompetenceCoursesBy(ExecutionYear.readCurrentExecutionYear())) {
	    new CCGUContext(destinyCompetenceCourseGroupUnit, competenceCourse, beginExecutionYear, endExecutionYear);
	}
    }
    
}