package net.sourceforge.fenixedu.dataTransferObject.administrativeOffice.externalUnits;

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

import net.sourceforge.fenixedu.dataTransferObject.LinkObject;
import net.sourceforge.fenixedu.domain.DomainReference;
import net.sourceforge.fenixedu.domain.ExternalCurricularCourse;
import net.sourceforge.fenixedu.domain.organizationalStructure.PartyTypeEnum;
import net.sourceforge.fenixedu.domain.organizationalStructure.Unit;

public class ExternalCurricularCourseResultBean extends AbstractExternalUnitResultBean {

    private DomainReference<ExternalCurricularCourse> externalCurricularCourse;

    public ExternalCurricularCourseResultBean(final ExternalCurricularCourse externalCurricularCourse,
	    PartyTypeEnum parentUnitType) {
	super();
	setExternalCurricularCourse(externalCurricularCourse);
	setParentUnitType(parentUnitType);
    }

    public ExternalCurricularCourseResultBean(final ExternalCurricularCourse externalCurricularCourse) {
	this(externalCurricularCourse, null);
    }

    public ExternalCurricularCourse getExternalCurricularCourse() {
	return (this.externalCurricularCourse != null) ? this.externalCurricularCourse.getObject() : null;
    }

    public void setExternalCurricularCourse(ExternalCurricularCourse externalCurricularCourse) {
	this.externalCurricularCourse = (externalCurricularCourse != null) ? new DomainReference<ExternalCurricularCourse>(
		externalCurricularCourse) : null;
    }

    @Override
    public Unit getUnit() {
	return getExternalCurricularCourse().getUnit();
    }

    @Override
    public ExternalDegreeModuleType getType() {
	return ExternalDegreeModuleType.CURRICULAR_COURSE;
    }

    public int getNumberOfExternalEnrolments() {
	return getExternalCurricularCourse().getExternalEnrolmentsCount();
    }

    @Override
    public List<LinkObject> getFullPath() {
	final List<LinkObject> result = new ArrayList<LinkObject>();
	for (final Unit unit : searchFullPath()) {
	    final LinkObject linkObject = new LinkObject();
	    linkObject.setId(unit.getIdInternal());
	    linkObject.setLabel(unit.getName());
	    linkObject.setMethod("viewUnit");
	    result.add(linkObject);
	}

	final LinkObject linkObject = new LinkObject();
	linkObject.setId(getExternalCurricularCourse().getIdInternal());
	linkObject.setLabel(getExternalCurricularCourse().getName());
	linkObject.setMethod("viewExternalCurricularCourse");
	result.add(linkObject);

	return result;
    }

    @Override
    public String getName() {
	return getExternalCurricularCourse().getName();
    }

    private static enum ExternalDegreeModuleType {
	CURRICULAR_COURSE;
	public String getName() {
	    return this.name();
	}
    }

    static public List<ExternalCurricularCourseResultBean> buildFrom(final Unit unit) {
	final List<ExternalCurricularCourseResultBean> result = new ArrayList<ExternalCurricularCourseResultBean>();
	for (final ExternalCurricularCourse each : getChildExternalCurricularCoursesFor(unit)) {
	    result.add(new ExternalCurricularCourseResultBean(each, unit.getType()));
	}
	return result;
    }

    static private List<ExternalCurricularCourse> getChildExternalCurricularCoursesFor(final Unit unit) {
	final List<ExternalCurricularCourse> result = new ArrayList<ExternalCurricularCourse>();
	getChildsWithType(result, unit);
	return result;
    }

    static private void getChildsWithType(final List<ExternalCurricularCourse> result, final Unit unit) {

	result.addAll(unit.getExternalCurricularCourses());

	switch (unit.getType()) {
	case COUNTRY:
	    addChildExternalCurricularCourses(result, unit, PartyTypeEnum.UNIVERSITY);
	    addChildExternalCurricularCourses(result, unit, PartyTypeEnum.SCHOOL);
	    break;
	case UNIVERSITY:
	    addChildExternalCurricularCourses(result, unit, PartyTypeEnum.SCHOOL);
	    addChildExternalCurricularCourses(result, unit, PartyTypeEnum.DEPARTMENT);
	    break;
	case SCHOOL:
	    addChildExternalCurricularCourses(result, unit, PartyTypeEnum.DEPARTMENT);
	    break;
	case DEPARTMENT:
	default:
	    break;
	}
    }

    static private void addChildExternalCurricularCourses(final List<ExternalCurricularCourse> result, final Unit unit,
	    final PartyTypeEnum parentUnitType) {

	for (final Unit each : unit.getSubUnits(parentUnitType)) {
	    getChildsWithType(result, each);
	}
    }

}