// © 2017 and later: Unicode, Inc. and others.

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

#include "unicode/utypes.h"

#if !UCONFIG_NO_FORMATTING

#ifndef __NUMBER_UTILS_H__

#define __NUMBER_UTILS_H__

#include "unicode/numberformatter.h"

#include "number_types.h"

#include "number_decimalquantity.h"

#include "number_scientific.h"

#include "number_patternstring.h"

#include "number_modifiers.h"

#include "number_multiplier.h"

#include "number_roundingutils.h"

#include "decNumber.h"

#include "charstr.h"

#include "formatted_string_builder.h"

U_NAMESPACE_BEGIN

namespace number {

namespace impl {

enum CldrPatternStyle {

    CLDR_PATTERN_STYLE_DECIMAL,

    CLDR_PATTERN_STYLE_CURRENCY,

    CLDR_PATTERN_STYLE_ACCOUNTING,

    CLDR_PATTERN_STYLE_PERCENT,

    CLDR_PATTERN_STYLE_SCIENTIFIC,

    CLDR_PATTERN_STYLE_COUNT,

};

// Namespace for naked functions

namespace utils {

inline int32_t insertDigitFromSymbols(FormattedStringBuilder& output, int32_t index, int8_t digit,

                                      const DecimalFormatSymbols& symbols, Field field,

                                      UErrorCode& status) {

    if (symbols.getCodePointZero() != -1) {

        return output.insertCodePoint(index, symbols.getCodePointZero() + digit, field, status);

    }

    return output.insert(index, symbols.getConstDigitSymbol(digit), field, status);

}

inline bool unitIsCurrency(const MeasureUnit& unit) {

    return uprv_strcmp("currency", unit.getType()) == 0;

}

inline bool unitIsBaseUnit(const MeasureUnit& unit) {

    return unit == MeasureUnit();

}

inline bool unitIsPercent(const MeasureUnit& unit) {

    return uprv_strcmp("percent", unit.getSubtype()) == 0;

}

inline bool unitIsPermille(const MeasureUnit& unit) {

    return uprv_strcmp("permille", unit.getSubtype()) == 0;

}

// NOTE: In Java, this method is in NumberFormat.java

const char16_t*

getPatternForStyle(const Locale& locale, const char* nsName, CldrPatternStyle style, UErrorCode& status);

/**

 * Computes the plural form for this number based on the specified set of rules.

 *

 * @param rules A {@link PluralRules} object representing the set of rules.

 * @return The {@link StandardPlural} according to the PluralRules. If the plural form is not in

 *     the set of standard plurals, {@link StandardPlural#OTHER} is returned instead.

 */

inline StandardPlural::Form getStandardPlural(const PluralRules *rules,

                                              const IFixedDecimal &fdec) {

    if (rules == nullptr) {

        // Fail gracefully if the user didn't provide a PluralRules

        return StandardPlural::Form::OTHER;

    } else {

        UnicodeString ruleString = rules->select(fdec);

        return StandardPlural::orOtherFromString(ruleString);

    }

}

/**

 * Computes the plural form after copying the number and applying rounding rules.

 */

inline StandardPlural::Form getPluralSafe(

        const RoundingImpl& rounder,

        const PluralRules* rules,

        const DecimalQuantity& dq,

        UErrorCode& status) {

    // TODO(ICU-20500): Avoid the copy?

    DecimalQuantity copy(dq);

    rounder.apply(copy, status);

    if (U_FAILURE(status)) {

        return StandardPlural::Form::OTHER;

    }

    return getStandardPlural(rules, copy);

}

} // namespace utils

} // namespace impl

} // namespace number

U_NAMESPACE_END

#endif //__NUMBER_UTILS_H__

#endif /* #if !UCONFIG_NO_FORMATTING */