package net.sourceforge.fenixedu.domain;

import java.util.Comparator;

import net.sourceforge.fenixedu.domain.exceptions.DomainException;

import org.apache.commons.beanutils.BeanComparator;
import org.apache.commons.collections.comparators.ComparatorChain;
import org.apache.commons.lang.StringUtils;
import org.joda.time.DateTime;

import dml.runtime.RelationAdapter;

public class ProjectSubmission extends ProjectSubmission_Base {

    static {
	ProjectSubmissionProject.addListener(new ProjectSubmissionProjectListener());
    }

    private static class ProjectSubmissionProjectListener extends RelationAdapter<ProjectSubmission, Project> {

	@Override
	public void beforeAdd(ProjectSubmission projectSubmission, Project project) {

	    if (project != null && projectSubmission != null) {
		if (!project.isSubmissionPeriodOpen()) {
		    throw new DomainException("error.project.submissionPeriodAlreadyExpired");
		}

		if (!project.canAddNewSubmissionWithoutExceedLimit(projectSubmission.getStudentGroup())) {
		    project.getOldestProjectSubmissionForStudentGroup(projectSubmission.getStudentGroup()).delete();
		}

		if (projectSubmission.getStudentGroup().getGrouping() != project.getGrouping()) {
		    throw new DomainException("error.project.studentGroupDoesNotBelongToProjectGrouping");
		}
	    }

	    super.beforeAdd(projectSubmission, project);
	}

    }

    public static Comparator<ProjectSubmission> COMPARATOR_BY_MOST_RECENT_SUBMISSION_DATE = new Comparator<ProjectSubmission>() {
	public int compare(ProjectSubmission projectSubmission, ProjectSubmission otherProjectSubmission) {
	    int comparationResult = projectSubmission.getSubmissionDateTime().compareTo(
		    otherProjectSubmission.getSubmissionDateTime());
	    return (comparationResult == 0) ? projectSubmission.getIdInternal().compareTo(otherProjectSubmission.getIdInternal())
		    : -(comparationResult);
	}
    };

    public static Comparator COMPARATOR_BY_GROUP_NUMBER = new BeanComparator("studentGroup.groupNumber");

    public static Comparator COMPARATOR_BY_GROUP_NUMBER_AND_MOST_RECENT_SUBMISSION_DATE = new ComparatorChain();

    static {
	((ComparatorChain) COMPARATOR_BY_GROUP_NUMBER_AND_MOST_RECENT_SUBMISSION_DATE).addComparator(COMPARATOR_BY_GROUP_NUMBER);
	((ComparatorChain) COMPARATOR_BY_GROUP_NUMBER_AND_MOST_RECENT_SUBMISSION_DATE)
		.addComparator(COMPARATOR_BY_MOST_RECENT_SUBMISSION_DATE);
    }

    public ProjectSubmission(Project project, StudentGroup studentGroup, Attends attends,
	    ProjectSubmissionFile projectSubmissionFile) {
	super();

	setRootDomainObject(RootDomainObject.getInstance());
	setSubmissionDateTime(new DateTime());
	setStudentGroup(studentGroup);
	setAttends(attends);
	setProjectSubmissionFile(projectSubmissionFile);
	setProject(project);

    }

    public void delete() {
	getProjectSubmissionFile().delete();
	removeAttends();
	removeProject();
	removeStudentGroup();
	removeRootDomainObject();
	super.deleteDomainObject();

    }

    public boolean isTeacherObservationAvailable() {
	return !StringUtils.isEmpty(this.getTeacherObservation());
    }

}