// © 2016 and later: Unicode, Inc. and others.

// License & terms of use: http://www.unicode.org/copyright.html

/*

*******************************************************************************

* Copyright (C) 2003 - 2013, International Business Machines Corporation and

* others. All Rights Reserved.

*******************************************************************************

*/

#include "unicode/utypes.h"

#if !UCONFIG_NO_FORMATTING

#include "gregoimp.h"

#include "umutex.h"

#include "ethpccal.h"

#include "cecal.h"

#include <float.h>

U_NAMESPACE_BEGIN

UOBJECT_DEFINE_RTTI_IMPLEMENTATION(EthiopicCalendar)

UOBJECT_DEFINE_RTTI_IMPLEMENTATION(EthiopicAmeteAlemCalendar)

static const int32_t JD_EPOCH_OFFSET_AMETE_ALEM = -285019;

static const int32_t JD_EPOCH_OFFSET_AMETE_MIHRET = 1723856;

static const int32_t AMETE_MIHRET_DELTA = 5500; // 5501 - 1 (Amete Alem 5501 = Amete Mihret 1)

//-------------------------------------------------------------------------

// Constructors...

//-------------------------------------------------------------------------

EthiopicCalendar::EthiopicCalendar(const Locale& aLocale,

                                   UErrorCode& success)

:   CECalendar(aLocale, success)

{

}

EthiopicCalendar::~EthiopicCalendar()

{

}

EthiopicCalendar*

EthiopicCalendar::clone() const

{

    return new EthiopicCalendar(*this);

}

const char *

EthiopicCalendar::getType() const

{

    return "ethiopic";

}

//-------------------------------------------------------------------------

// Calendar framework

//-------------------------------------------------------------------------

int32_t

EthiopicCalendar::handleGetExtendedYear(UErrorCode& status)

{

    if (U_FAILURE(status)) {

        return 0;

    }

    // Ethiopic calendar uses EXTENDED_YEAR aligned to

    // Amelete Hihret year always.

    if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {

        return internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1

    }

    // The year defaults to the epoch start, the era to AMETE_MIHRET

    if (internalGet(UCAL_ERA, AMETE_MIHRET) == AMETE_MIHRET) {

        return internalGet(UCAL_YEAR, 1); // Default to year 1

    }

    int32_t year = internalGet(UCAL_YEAR, 1);

    if (uprv_add32_overflow(year, -AMETE_MIHRET_DELTA, &year)) {

        status = U_ILLEGAL_ARGUMENT_ERROR;

        return 0;

    }

    return year;

}

IMPL_SYSTEM_DEFAULT_CENTURY(EthiopicCalendar, "@calendar=ethiopic")

int32_t

EthiopicCalendar::getJDEpochOffset() const

{

    return JD_EPOCH_OFFSET_AMETE_MIHRET;

}

int32_t EthiopicCalendar::extendedYearToEra(int32_t extendedYear) const {

    return extendedYear <= 0 ? AMETE_ALEM : AMETE_MIHRET;

}

int32_t EthiopicCalendar::extendedYearToYear(int32_t extendedYear) const {

    return extendedYear <= 0 ? extendedYear + AMETE_MIHRET_DELTA : extendedYear;

}

int32_t EthiopicCalendar::getRelatedYearDifference() const {

    constexpr int32_t kEthiopicCalendarRelatedYearDifference = 8;

    return kEthiopicCalendarRelatedYearDifference;

}

//-------------------------------------------------------------------------

// Constructors...

//-------------------------------------------------------------------------

EthiopicAmeteAlemCalendar::EthiopicAmeteAlemCalendar(const Locale& aLocale,

                                   UErrorCode& success)

:   EthiopicCalendar(aLocale, success)

{

}

EthiopicAmeteAlemCalendar::~EthiopicAmeteAlemCalendar()

{

}

EthiopicAmeteAlemCalendar*

EthiopicAmeteAlemCalendar::clone() const

{

    return new EthiopicAmeteAlemCalendar(*this);

}

//-------------------------------------------------------------------------

// Calendar framework

//-------------------------------------------------------------------------

const char *

EthiopicAmeteAlemCalendar::getType() const

{

    return "ethiopic-amete-alem";

}

int32_t

EthiopicAmeteAlemCalendar::handleGetExtendedYear(UErrorCode& status)

{

    if (U_FAILURE(status)) {

        return 0;

    }

    // Ethiopic calendar uses EXTENDED_YEAR aligned to

    // Amelete Hihret year always.

    if (newerField(UCAL_EXTENDED_YEAR, UCAL_YEAR) == UCAL_EXTENDED_YEAR) {

        return internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1

    }

    // Default to year 1

    return internalGet(UCAL_YEAR, 1);

}

int32_t

EthiopicAmeteAlemCalendar::getJDEpochOffset() const

{

    return JD_EPOCH_OFFSET_AMETE_ALEM;

}

int32_t EthiopicAmeteAlemCalendar::extendedYearToEra(int32_t /* extendedYear */) const {

    return AMETE_ALEM;

}

int32_t EthiopicAmeteAlemCalendar::extendedYearToYear(int32_t extendedYear) const {

    return extendedYear;

}

int32_t

EthiopicAmeteAlemCalendar::handleGetLimit(UCalendarDateFields field, ELimitType limitType) const

{

    if (field == UCAL_ERA) {

        return 0; // Only one era in this mode, era is always 0

    }

    return EthiopicCalendar::handleGetLimit(field, limitType);

}

U_NAMESPACE_END

#endif