// © 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 "umutex.h"

#include "coptccal.h"

#include "cecal.h"

#include <float.h>

U_NAMESPACE_BEGIN

UOBJECT_DEFINE_RTTI_IMPLEMENTATION(CopticCalendar)

static const int32_t COPTIC_JD_EPOCH_OFFSET  = 1824665;

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

// Constructors...

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

CopticCalendar::CopticCalendar(const Locale& aLocale, UErrorCode& success)

: CECalendar(aLocale, success)

{

}

CopticCalendar::CopticCalendar (const CopticCalendar& other) 

: CECalendar(other)

{

}

CopticCalendar::~CopticCalendar()

{

}

CopticCalendar*

CopticCalendar::clone() const

{

    return new CopticCalendar(*this);

}

const char*

CopticCalendar::getType() const

{

    return "coptic";

}

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

// Calendar framework

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

int32_t

CopticCalendar::handleGetExtendedYear()

{

    int32_t eyear;

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

        eyear = internalGet(UCAL_EXTENDED_YEAR, 1); // Default to year 1

    } else {

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

        int32_t era = internalGet(UCAL_ERA, CE);

        if (era == BCE) {

            eyear = 1 - internalGet(UCAL_YEAR, 1); // Convert to extended year

        } else {

            eyear = internalGet(UCAL_YEAR, 1); // Default to year 1

        }

    }

    return eyear;

}

void

CopticCalendar::handleComputeFields(int32_t julianDay, UErrorCode &/*status*/)

{

    int32_t eyear, month, day, era, year;

    jdToCE(julianDay, getJDEpochOffset(), eyear, month, day);

    if (eyear <= 0) {

        era = BCE;

        year = 1 - eyear;

    } else {

        era = CE;

        year = eyear;

    }

    internalSet(UCAL_EXTENDED_YEAR, eyear);

    internalSet(UCAL_ERA, era);

    internalSet(UCAL_YEAR, year);

    internalSet(UCAL_MONTH, month);

    internalSet(UCAL_DATE, day);

    internalSet(UCAL_DAY_OF_YEAR, (30 * month) + day);

}

/**

 * The system maintains a static default century start date and Year.  They are

 * initialized the first time they are used.  Once the system default century date 

 * and year are set, they do not change.

 */

static UDate           gSystemDefaultCenturyStart       = DBL_MIN;

static int32_t         gSystemDefaultCenturyStartYear   = -1;

static icu::UInitOnce  gSystemDefaultCenturyInit        = U_INITONCE_INITIALIZER;

static void U_CALLCONV initializeSystemDefaultCentury() {

    UErrorCode status = U_ZERO_ERROR;

    CopticCalendar calendar(Locale("@calendar=coptic"), status);

    if (U_SUCCESS(status)) {

        calendar.setTime(Calendar::getNow(), status);

        calendar.add(UCAL_YEAR, -80, status);

        gSystemDefaultCenturyStart = calendar.getTime(status);

        gSystemDefaultCenturyStartYear = calendar.get(UCAL_YEAR, status);

    }

    // We have no recourse upon failure unless we want to propagate the failure

    // out.

}

UDate

CopticCalendar::defaultCenturyStart() const

{

    // lazy-evaluate systemDefaultCenturyStart

    umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);

    return gSystemDefaultCenturyStart;

}

int32_t

CopticCalendar::defaultCenturyStartYear() const

{

    // lazy-evaluate systemDefaultCenturyStart

    umtx_initOnce(gSystemDefaultCenturyInit, &initializeSystemDefaultCentury);

    return gSystemDefaultCenturyStartYear;

}

int32_t

CopticCalendar::getJDEpochOffset() const

{

    return COPTIC_JD_EPOCH_OFFSET;

}

#if 0

// We do not want to introduce this API in ICU4C.

// It was accidentally introduced in ICU4J as a public API.

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

// Calendar system Conversion methods...

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

int32_t

CopticCalendar::copticToJD(int32_t year, int32_t month, int32_t day)

{

    return CECalendar::ceToJD(year, month, day, COPTIC_JD_EPOCH_OFFSET);

}

#endif

U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_FORMATTING */

//eof