/*
  This file is part of KOrganizer.

  Copyright (c) 2002,2003 Cornelius Schumacher <schumacher@kde.org>

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

  As a special exception, permission is given to link this program
  with any edition of Qt, and distribute the resulting executable,
  without including the source code for Qt in the source distribution.
*/

#include "koglobals.h"
#include "prefs/koprefs.h"

#include <KHolidays/HolidayRegion>

#include <KIconLoader>

#include <QApplication>

class KOGlobalsSingletonPrivate
{
public:
    KOGlobals instance;
};

Q_GLOBAL_STATIC(KOGlobalsSingletonPrivate, sKOGlobalsSingletonPrivate)

KOGlobals *KOGlobals::self()
{
    return &sKOGlobalsSingletonPrivate->instance;
}

KOGlobals::KOGlobals() : mHolidays(Q_NULLPTR)
{
}

KOGlobals::~KOGlobals()
{
    delete mHolidays;
}

bool KOGlobals::reverseLayout()
{
    return QApplication::isRightToLeft();
}

QPixmap KOGlobals::smallIcon(const QString &name) const
{
    return SmallIcon(name);
}

QMap<QDate, QStringList> KOGlobals::holiday(const QDate &start, const QDate &end) const
{
    QMap<QDate, QStringList> holidaysByDate;

    if (!mHolidays) {
        return holidaysByDate;
    }

    const KHolidays::Holiday::List list = mHolidays->holidays(start, end);
    for (int i = 0; i < list.count(); ++i) {
        const KHolidays::Holiday &h = list.at(i);
        holidaysByDate[h.observedStartDate()].append(h.name());
    }
    return holidaysByDate;
}

QList<QDate> KOGlobals::workDays(const QDate &startDate,
                                 const QDate &endDate) const
{
    QList<QDate> result;

    const int mask(~(KOPrefs::instance()->mWorkWeekMask));
    const int numDays = startDate.daysTo(endDate) + 1;

    for (int i = 0; i < numDays; ++i) {
        const QDate date = startDate.addDays(i);
        if (!(mask & (1 << (date.dayOfWeek() - 1)))) {
            result.append(date);
        }
    }

    if (mHolidays && KOPrefs::instance()->mExcludeHolidays) {
        const KHolidays::Holiday::List list = mHolidays->holidays(startDate, endDate);
        for (int i = 0; i < list.count(); ++i) {
            const KHolidays::Holiday &h = list.at(i);
            const QString dateString = h.observedStartDate().toString();
            if (h.dayType() == KHolidays::Holiday::NonWorkday) {
                result.removeAll(h.observedStartDate());
            }
        }
    }

    return result;
}

int KOGlobals::getWorkWeekMask()
{
    return KOPrefs::instance()->mWorkWeekMask;
}

void KOGlobals::setHolidays(KHolidays::HolidayRegion *h)
{
    delete mHolidays;
    mHolidays = h;
}

KHolidays::HolidayRegion *KOGlobals::holidays() const
{
    return mHolidays;
}
