// © 2018 and later: Unicode, Inc. and others.

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

#include "unicode/utypes.h"

#if !UCONFIG_NO_FORMATTING

// Allow implicit conversion from char16_t* to UnicodeString for this file:

// Helpful in toString methods and elsewhere.

#define UNISTR_FROM_STRING_EXPLICIT

#include "numparse_types.h"

#include "number_currencysymbols.h"

using namespace icu;

using namespace icu::number;

using namespace icu::number::impl;

CurrencySymbols::CurrencySymbols(CurrencyUnit currency, const Locale& locale, UErrorCode& status)

        : fCurrency(currency), fLocaleName(locale.getName(), status) {

    fCurrencySymbol.setToBogus();

    fIntlCurrencySymbol.setToBogus();

}

CurrencySymbols::CurrencySymbols(CurrencyUnit currency, const Locale& locale,

                                 const DecimalFormatSymbols& symbols, UErrorCode& status)

        : CurrencySymbols(currency, locale, status) {

    // If either of the overrides is present, save it in the local UnicodeString.

    if (symbols.isCustomCurrencySymbol()) {

        fCurrencySymbol = symbols.getConstSymbol(DecimalFormatSymbols::kCurrencySymbol);

    }

    if (symbols.isCustomIntlCurrencySymbol()) {

        fIntlCurrencySymbol = symbols.getConstSymbol(DecimalFormatSymbols::kIntlCurrencySymbol);

    }

}

const char16_t* CurrencySymbols::getIsoCode() const {

    return fCurrency.getISOCurrency();

}

UnicodeString CurrencySymbols::getNarrowCurrencySymbol(UErrorCode& status) const {

    // Note: currently no override is available for narrow currency symbol

    return loadSymbol(UCURR_NARROW_SYMBOL_NAME, status);

}

UnicodeString CurrencySymbols::getFormalCurrencySymbol(UErrorCode& status) const {

    // Note: currently no override is available for formal currency symbol

    return loadSymbol(UCURR_FORMAL_SYMBOL_NAME, status);

}

UnicodeString CurrencySymbols::getVariantCurrencySymbol(UErrorCode& status) const {

    // Note: currently no override is available for variant currency symbol

    return loadSymbol(UCURR_VARIANT_SYMBOL_NAME, status);

}

UnicodeString CurrencySymbols::getCurrencySymbol(UErrorCode& status) const {

    if (!fCurrencySymbol.isBogus()) {

        return fCurrencySymbol;

    }

    return loadSymbol(UCURR_SYMBOL_NAME, status);

}

UnicodeString CurrencySymbols::loadSymbol(UCurrNameStyle selector, UErrorCode& status) const {

    const char16_t* isoCode = fCurrency.getISOCurrency();

    int32_t symbolLen = 0;

    const char16_t* symbol = ucurr_getName(

            isoCode,

            fLocaleName.data(),

            selector,

            nullptr /* isChoiceFormat */,

            &symbolLen,

            &status);

    // If given an unknown currency, ucurr_getName returns the input string, which we can't alias safely!

    // Otherwise, symbol points to a resource bundle, and we can use readonly-aliasing constructor.

    if (symbol == isoCode) {

        return UnicodeString(isoCode, 3);

    } else {

        return UnicodeString(true, symbol, symbolLen);

    }

}

UnicodeString CurrencySymbols::getIntlCurrencySymbol(UErrorCode&) const {

    if (!fIntlCurrencySymbol.isBogus()) {

        return fIntlCurrencySymbol;

    }

    // Note: Not safe to use readonly-aliasing constructor here because the buffer belongs to this object,

    // which could be destructed or moved during the lifetime of the return value.

    return UnicodeString(fCurrency.getISOCurrency(), 3);

}

UnicodeString CurrencySymbols::getPluralName(StandardPlural::Form plural, UErrorCode& status) const {

    const char16_t* isoCode = fCurrency.getISOCurrency();

    int32_t symbolLen = 0;

    const char16_t* symbol = ucurr_getPluralName(

            isoCode,

            fLocaleName.data(),

            nullptr /* isChoiceFormat */,

            StandardPlural::getKeyword(plural),

            &symbolLen,

            &status);

    // If given an unknown currency, ucurr_getName returns the input string, which we can't alias safely!

    // Otherwise, symbol points to a resource bundle, and we can use readonly-aliasing constructor.

    if (symbol == isoCode) {

        return UnicodeString(isoCode, 3);

    } else {

        return UnicodeString(true, symbol, symbolLen);

    }

}

bool CurrencySymbols::hasEmptyCurrencySymbol() const {

    return !fCurrencySymbol.isBogus() && fCurrencySymbol.isEmpty();

}

CurrencyUnit

icu::number::impl::resolveCurrency(const DecimalFormatProperties& properties, const Locale& locale,

                                   UErrorCode& status) {

    if (!properties.currency.isNull()) {

        return properties.currency.getNoError();

    } else {

        UErrorCode localStatus = U_ZERO_ERROR;

        char16_t buf[4] = {};

        ucurr_forLocale(locale.getName(), buf, 4, &localStatus);

        if (U_SUCCESS(localStatus)) {

            return CurrencyUnit(buf, status);

        } else {

            // Default currency (XXX)

            return {};

        }

    }

}

#endif /* #if !UCONFIG_NO_FORMATTING */