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

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

import net.sourceforge.fenixedu.applicationTier.Servico.exceptions.FenixServiceException;
import net.sourceforge.fenixedu.dataTransferObject.department.ExecutionCourseStatisticsDTO;
import net.sourceforge.fenixedu.domain.CompetenceCourse;
import net.sourceforge.fenixedu.domain.CurricularCourse;
import net.sourceforge.fenixedu.domain.Degree;
import net.sourceforge.fenixedu.domain.ExecutionCourse;
import net.sourceforge.fenixedu.domain.ExecutionSemester;
import net.sourceforge.fenixedu.domain.ExecutionYear;
import net.sourceforge.fenixedu.domain.Professorship;

public class ComputeExecutionCourseStatistics extends ComputeCourseStatistics {

    public List<ExecutionCourseStatisticsDTO> run(Integer competenceCourseId, Integer degreeId, Integer executionPeriodId)
	    throws FenixServiceException {
	CompetenceCourse competenceCourse = rootDomainObject.readCompetenceCourseByOID(competenceCourseId);
	Degree degree = rootDomainObject.readDegreeByOID(degreeId);
	ExecutionSemester executionSemester = rootDomainObject.readExecutionSemesterByOID(executionPeriodId);

	List<CurricularCourse> curricularCourses = competenceCourse.getAssociatedCurricularCoursesGroupedByDegree().get(degree);

	List<ExecutionCourse> executionCourses = new ArrayList<ExecutionCourse>();

	// for (ExecutionPeriod executionPeriod :
	// executionYear.getExecutionPeriods()) {
	for (CurricularCourse course : curricularCourses) {
	    executionCourses.addAll(course.getExecutionCoursesByExecutionPeriod(executionSemester));
	}
	// }

	List<ExecutionCourseStatisticsDTO> results = new ArrayList<ExecutionCourseStatisticsDTO>();

	for (ExecutionCourse executionCourse : executionCourses) {
	    ExecutionCourseStatisticsDTO executionCourseStatistics = new ExecutionCourseStatisticsDTO();
	    executionCourseStatistics.setIdInternal(competenceCourse.getIdInternal());
	    executionCourseStatistics.setName(competenceCourse.getName());

	    executionCourseStatistics.setExecutionPeriod(executionCourse.getExecutionPeriod().getName());
	    executionCourseStatistics.setTeacher(getResponsibleTeacherName(executionCourse));
	    executionCourseStatistics.setExecutionYear(executionCourse.getExecutionPeriod().getExecutionYear().getYear());
	    executionCourseStatistics.setDegrees(getDegrees(executionCourse));

	    createCourseStatistics(executionCourseStatistics, executionCourse.getActiveEnrollments());

	    results.add(executionCourseStatistics);
	}

	return results;
    }

    private String getResponsibleTeacherName(ExecutionCourse executionCourse) {
	for (Professorship professorship : executionCourse.getProfessorships()) {
	    if (professorship.getResponsibleFor().booleanValue()) {
		return professorship.getPerson().getName();
	    }
	}

	return "";
    }

    private List<String> getDegrees(ExecutionCourse executionCourse) {
	Set<Degree> degrees = new HashSet<Degree>();
	for (CurricularCourse curricularCourse : executionCourse.getAssociatedCurricularCourses()) {
	    degrees.add(curricularCourse.getDegreeCurricularPlan().getDegree());
	}

	ExecutionYear executionYear = executionCourse.getExecutionYear();

	List<String> degreeNames = new ArrayList<String>();
	for (Degree degree : degrees) {
	    degreeNames.add(degree.getNameFor(executionYear).getContent());
	}

	return degreeNames;
    }
}