package net.sourceforge.fenixedu.presentationTier.renderers.providers;

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

import net.sourceforge.fenixedu.dataTransferObject.resourceAllocationManager.RoomOccupationWeekBean;
import net.sourceforge.fenixedu.dataTransferObject.resourceAllocationManager.WeekBean;
import net.sourceforge.fenixedu.domain.time.calendarStructure.AcademicInterval;

import org.joda.time.DateTime;
import org.joda.time.DateTimeConstants;
import org.joda.time.format.DateTimeFormat;

import pt.ist.fenixWebFramework.renderers.DataProvider;
import pt.ist.fenixWebFramework.renderers.components.converters.BiDirectionalConverter;
import pt.ist.fenixWebFramework.renderers.components.converters.Converter;

public class RoomOccupationWeekBeanProvider implements DataProvider {

    @Override
    public Converter getConverter() {
        // return null;
        return new BiDirectionalConverter() {

            @Override
            public Object convert(Class type, Object value) {
                if (value == null) {
                    return null;
                }

                return new WeekBean(DateTimeFormat.forPattern("yyyy.MM.dd").parseDateTime((String) value));
            }

            @Override
            public String deserialize(Object object) {

                WeekBean bean = (WeekBean) object;
                return bean.getWeek().toString("yyyy.MM.dd");
            }

        };
    }

    @Override
    public Object provide(Object source, Object current) {
        RoomOccupationWeekBean roomOccupationWeekBean = (RoomOccupationWeekBean) source;

        List<WeekBean> result = new ArrayList<WeekBean>();

        if (roomOccupationWeekBean.getAcademicInterval() == null) {
            return result;
        }

        DateTime start = roomOccupationWeekBean.getAcademicInterval().getStart();
        DateTime end = getMaximum(roomOccupationWeekBean);

        for (DateTime date = start; date.isBefore(end); date = date.plusDays(1)) {
            if (date.getDayOfWeek() == DateTimeConstants.MONDAY) {
                result.add(new WeekBean(date));
            }
        }
        return result;
    }

    private DateTime getMaximum(RoomOccupationWeekBean roomOccupationWeekBean) {
        AcademicInterval nextAcademicInterval = roomOccupationWeekBean.getAcademicInterval().getNextAcademicInterval();
        if (nextAcademicInterval != null) {
            if (nextAcademicInterval.getStart().isAfter(roomOccupationWeekBean.getAcademicInterval().getEnd())) {
                return nextAcademicInterval.getStart();
            }
        }

        return roomOccupationWeekBean.getAcademicInterval().getEnd();
    }
}