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

import java.util.List;

import net.sourceforge.fenixedu.applicationTier.FenixService;
import net.sourceforge.fenixedu.commons.CollectionUtils;
import net.sourceforge.fenixedu.domain.teacher.Category;
import net.sourceforge.fenixedu.domain.teacherServiceDistribution.TSDTeacher;
import net.sourceforge.fenixedu.domain.teacherServiceDistribution.TSDVirtualTeacher;
import net.sourceforge.fenixedu.domain.teacherServiceDistribution.TeacherServiceDistribution;

import org.apache.commons.collections.Predicate;

public class CreateTSDTeacher extends FenixService {
    public Boolean run(String teacherName, Integer categoryId, Integer requiredHours, Integer tsdId) {

	Category category = rootDomainObject.readCategoryByOID(categoryId);
	TeacherServiceDistribution tsd = rootDomainObject.readTeacherServiceDistributionByOID(tsdId);

	if (existsVirtualTeacherWithSameName(tsd.getTSDTeachers(), teacherName)) {
	    return false;
	}

	TSDTeacher tsdTeacher = new TSDVirtualTeacher(category, teacherName, requiredHours);
	tsd.addTSDTeachers(tsdTeacher);

	return true;
    }

    private boolean existsVirtualTeacherWithSameName(List<TSDTeacher> tsdTeachers, final String teacherName) {
	return CollectionUtils.exists(tsdTeachers, new Predicate() {
	    public boolean evaluate(Object arg) {
		if (arg instanceof TSDVirtualTeacher) {
		    TSDVirtualTeacher tsdTeacher = (TSDVirtualTeacher) arg;
		    return tsdTeacher.getName().equals(teacherName);
		}
		return false;
	    }
	});
    }
}