/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/*

Copyright (C) 2000, 2001, 2002, 2003 RiskMap srl

Copyright (C) 2017 Francois Botha

This file is part of QuantLib, a free-software/open-source library

for financial quantitative analysts and developers - http://quantlib.org/

QuantLib is free software: you can redistribute it and/or modify it

under the terms of the QuantLib license.  You should have received a

copy of the license along with this program; if not, please email

<quantlib-dev@lists.sf.net>. The license is also available online at

<http://quantlib.org/license.shtml>.

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 license for more details.

*/

#include <ql/time/calendars/botswana.hpp>

namespace QuantLib {

    Botswana::Botswana() {

        // all calendar instances share the same implementation instance

        static ext::shared_ptr<Calendar::Impl> impl(new Botswana::Impl);

        impl_ = impl;

    }

    bool Botswana::Impl::isBusinessDay(const Date& date) const {

        Weekday w = date.weekday();

        Day d = date.dayOfMonth(), dd = date.dayOfYear();

        Month m = date.month();

        Year y = date.year();

        Day em = easterMonday(y);

        if (isWeekend(w)

            // New Year's Day (possibly moved to Monday or Tuesday)

            || ((d == 1 || (d == 2 && w == Monday) || (d == 3 && w == Tuesday)) 

                && m == January)

            // Good Friday

            || (dd == em - 3)

            // Easter Monday

            || (dd == em)

            // Labour Day, May 1st (possibly moved to Monday)

            || ((d == 1 || (d == 2 && w == Monday))

                && m == May)

            // Ascension

            || (dd == em + 38)

            // Sir Seretse Khama Day, July 1st (possibly moved to Monday)

            || ((d == 1 || (d == 2 && w == Monday))

                && m == July)

            // Presidents' Day (third Monday of July)

            || ((d >= 15 && d <= 21) && w == Monday && m == July)

            // Independence Day, September 30th (possibly moved to Monday)

            || ((d == 30 && m == September) || 

                (d == 1  && w == Monday && m == October))

            // Botswana Day, October 1st (possibly moved to Monday or Tuesday)

            || ((d == 1 || (d == 2 && w == Monday) || (d == 3 && w == Tuesday)) 

                && m == October)

            // Christmas

            || (d == 25 && m == December)

            // Boxing Day (possibly moved to Monday)

            || ((d == 26 || (d == 27 && w == Monday))

                && m == December)

            )

            return false; // NOLINT(readability-simplify-boolean-expr)

        return true;

    }

}