// © 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 "number_decnum.h"

#include "number_types.h"

#include "number_multiplier.h"

#include "numparse_validators.h"

#include "number_utils.h"

#include "decNumber.h"

using namespace icu;

using namespace icu::number;

using namespace icu::number::impl;

using namespace icu::numparse::impl;

Scale::Scale(int32_t magnitude, DecNum* arbitraryToAdopt)

        : fMagnitude(magnitude), fArbitrary(arbitraryToAdopt), fError(U_ZERO_ERROR) {

    if (fArbitrary != nullptr) {

        // Attempt to convert the DecNum to a magnitude multiplier.

        fArbitrary->normalize();

        if (fArbitrary->getRawDecNumber()->digits == 1 && fArbitrary->getRawDecNumber()->lsu[0] == 1 &&

            !fArbitrary->isNegative()) {

            // Success!

            fMagnitude += fArbitrary->getRawDecNumber()->exponent;

            delete fArbitrary;

            fArbitrary = nullptr;

        }

    }

}

Scale::Scale(const Scale& other)

        : fMagnitude(other.fMagnitude), fArbitrary(nullptr), fError(other.fError) {

    if (other.fArbitrary != nullptr) {

        UErrorCode localStatus = U_ZERO_ERROR;

        fArbitrary = new DecNum(*other.fArbitrary, localStatus);

    }

}

Scale& Scale::operator=(const Scale& other) {

    if (this == &other) { return *this; }  // self-assignment: no-op

    fMagnitude = other.fMagnitude;

    if (other.fArbitrary != nullptr) {

        UErrorCode localStatus = U_ZERO_ERROR;

        fArbitrary = new DecNum(*other.fArbitrary, localStatus);

    } else {

        fArbitrary = nullptr;

    }

    fError = other.fError;

    return *this;

}

Scale::Scale(Scale&& src) U_NOEXCEPT

        : fMagnitude(src.fMagnitude), fArbitrary(src.fArbitrary), fError(src.fError) {

    // Take ownership away from src if necessary

    src.fArbitrary = nullptr;

}

Scale& Scale::operator=(Scale&& src) U_NOEXCEPT {

    fMagnitude = src.fMagnitude;

    if (fArbitrary != nullptr) {

        delete fArbitrary;

    }

    fArbitrary = src.fArbitrary;

    fError = src.fError;

    // Take ownership away from src if necessary

    src.fArbitrary = nullptr;

    return *this;

}

Scale::~Scale() {

    delete fArbitrary;

}

Scale Scale::none() {

    return {0, nullptr};

}

Scale Scale::powerOfTen(int32_t power) {

    return {power, nullptr};

}

Scale Scale::byDecimal(StringPiece multiplicand) {

    UErrorCode localError = U_ZERO_ERROR;

    LocalPointer<DecNum> decnum(new DecNum(), localError);

    if (U_FAILURE(localError)) {

        return {localError};

    }

    decnum->setTo(multiplicand, localError);

    if (U_FAILURE(localError)) {

        return {localError};

    }

    return {0, decnum.orphan()};

}

Scale Scale::byDouble(double multiplicand) {

    UErrorCode localError = U_ZERO_ERROR;

    LocalPointer<DecNum> decnum(new DecNum(), localError);

    if (U_FAILURE(localError)) {

        return {localError};

    }

    decnum->setTo(multiplicand, localError);

    if (U_FAILURE(localError)) {

        return {localError};

    }

    return {0, decnum.orphan()};

}

Scale Scale::byDoubleAndPowerOfTen(double multiplicand, int32_t power) {

    UErrorCode localError = U_ZERO_ERROR;

    LocalPointer<DecNum> decnum(new DecNum(), localError);

    if (U_FAILURE(localError)) {

        return {localError};

    }

    decnum->setTo(multiplicand, localError);

    if (U_FAILURE(localError)) {

        return {localError};

    }

    return {power, decnum.orphan()};

}

void Scale::applyTo(impl::DecimalQuantity& quantity) const {

    quantity.adjustMagnitude(fMagnitude);

    if (fArbitrary != nullptr) {

        UErrorCode localStatus = U_ZERO_ERROR;

        quantity.multiplyBy(*fArbitrary, localStatus);

    }

}

void Scale::applyReciprocalTo(impl::DecimalQuantity& quantity) const {

    quantity.adjustMagnitude(-fMagnitude);

    if (fArbitrary != nullptr) {

        UErrorCode localStatus = U_ZERO_ERROR;

        quantity.divideBy(*fArbitrary, localStatus);

    }

}

void

MultiplierFormatHandler::setAndChain(const Scale& multiplier, const MicroPropsGenerator* parent) {

    fMultiplier = multiplier;

    fParent = parent;

}

void MultiplierFormatHandler::processQuantity(DecimalQuantity& quantity, MicroProps& micros,

                                              UErrorCode& status) const {

    fParent->processQuantity(quantity, micros, status);

    fMultiplier.applyTo(quantity);

}

#endif /* #if !UCONFIG_NO_FORMATTING */