package net.sourceforge.fenixedu.dataTransferObject;

import java.util.Calendar;
import java.util.Comparator;

import net.sourceforge.fenixedu.domain.DomainReference;
import net.sourceforge.fenixedu.domain.FrequencyType;
import net.sourceforge.fenixedu.domain.Lesson;
import net.sourceforge.fenixedu.domain.ShiftType;
import net.sourceforge.fenixedu.domain.space.AllocatableSpace;
import net.sourceforge.fenixedu.util.DiaSemana;

import org.joda.time.YearMonthDay;

public class InfoLesson extends InfoShowOccupation implements Comparable<InfoLesson> {

    private final static Comparator<InfoLesson> INFO_LESSON_COMPARATOR_CHAIN = new Comparator<InfoLesson>() {

	@Override
	public int compare(InfoLesson o1, InfoLesson o2) {
	    final int c1 = o1.getDiaSemana().getDiaSemana().compareTo(o2.getDiaSemana().getDiaSemana());
	    if (c1 != 0) {
		return c1;
	    }
	    final int c2 = o1.getInicio().compareTo(o2.getInicio());
	    if (c2 != 0) {
		return c2;
	    }
	    final int c3 = o1.getFim().compareTo(o2.getFim());
	    return c3 != 0 ? o1.getInfoSala().getNome().compareTo(o2.getInfoShift().getNome()) : c3;
	}

    };

    private DomainReference<Lesson> lesson;
    private InfoRoom infoSala;
    private InfoShift infoShift;
    private InfoRoomOccupation infoRoomOccupation;

    public InfoLesson(Lesson lesson) {
	super.copyFromDomain(lesson);
	this.lesson = new DomainReference<Lesson>(lesson);
    }

    @Override
    public ShiftType getTipo() {
	return null;
    }

    public DiaSemana getDiaSemana() {
	return getLesson().getDiaSemana();
    }

    public Calendar getFim() {
	return getLesson().getFim();
    }

    public Calendar getInicio() {
	return getLesson().getInicio();
    }

    public FrequencyType getFrequency() {
	return getLesson().getFrequency();
    }

    public YearMonthDay getLessonBegin() {
	return getLesson() != null && getLesson().hasPeriod() ? getLesson().getPeriod().getStartYearMonthDay() : null;
    }

    public YearMonthDay getLessonEnd() {
	return getLesson() != null && getLesson().hasPeriod() ? getLesson().getPeriod().getLastOccupationPeriodOfNestedPeriods()
		.getEndYearMonthDay() : null;
    }

    public String getWeekDay() {
	final String result = getDiaSemana().getDiaSemana().toString();
	if (result != null && result.equals("7")) {
	    return "S";
	}
	if (result != null && result.equals("1")) {
	    return "D";
	}
	return result;
    }

    public String getLessonDuration() {
	return getLesson().getUnitHours().toString();
    }

    public InfoRoom getInfoSala() {
	return (infoSala == null) ? infoSala = InfoRoom.newInfoFromDomain((AllocatableSpace) getLesson().getSala()) : infoSala;
    }

    public InfoShift getInfoShift() {
	return (infoShift == null) ? infoShift = InfoShift.newInfoFromDomain(getLesson().getShift()) : infoShift;
    }

    public InfoRoomOccupation getInfoRoomOccupation() {
	if (infoRoomOccupation == null) {
	    infoRoomOccupation = InfoRoomOccupation.newInfoFromDomain(getLesson().getLessonSpaceOccupation());
	}
	return infoRoomOccupation;
    }

    public static InfoLesson newInfoFromDomain(Lesson lesson) {
	return (lesson != null) ? new InfoLesson(lesson) : null;
    }

    public int compareTo(InfoLesson arg0) {
	return INFO_LESSON_COMPARATOR_CHAIN.compare(this, arg0);
    }

    public String getNextPossibleLessonInstanceDate() {
	YearMonthDay day = getLesson().getNextPossibleLessonInstanceDate();
	return day != null ? day.toString("dd/MM/yyyy") : "-";
    }

    public boolean equals(Object obj) {
	boolean resultado = false;
	if (obj instanceof InfoLesson) {
	    InfoLesson infoAula = (InfoLesson) obj;
	    resultado = (getDiaSemana().equals(infoAula.getDiaSemana()))
		    && (getInicio().get(Calendar.HOUR_OF_DAY) == infoAula.getInicio().get(Calendar.HOUR_OF_DAY))
		    && (getInicio().get(Calendar.MINUTE) == infoAula.getInicio().get(Calendar.MINUTE))
		    && (getFim().get(Calendar.HOUR_OF_DAY) == infoAula.getFim().get(Calendar.HOUR_OF_DAY))
		    && (getFim().get(Calendar.MINUTE) == infoAula.getFim().get(Calendar.MINUTE))
		    && ((getInfoSala() == null && infoAula.getInfoSala() == null) || (getInfoSala() != null && getInfoSala()
			    .equals(infoAula.getInfoSala())))
		    && ((getInfoRoomOccupation() == null && infoAula.getInfoRoomOccupation() == null) || (getInfoRoomOccupation() != null && getInfoRoomOccupation()
			    .equals(infoAula.getInfoRoomOccupation())));
	}
	return resultado;
    }

    private Lesson getLesson() {
	return lesson == null ? null : lesson.getObject();
    }
}