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/*
 * Copyright (c) 2021, Tim Flynn <trflynn89@pm.me>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#pragma once

#include <AK/Optional.h>
#include <AK/String.h>
#include <LibJS/Runtime/Object.h>

namespace JS::Intl {

class NumberFormat final : public Object {
    JS_OBJECT(NumberFormat, Object);

public:
    enum class Style {
        Invalid,
        Decimal,
        Percent,
        Currency,
        Unit,
    };

    enum class CurrencyDisplay {
        Code,
        Symbol,
        NarrowSymbol,
        Name,
    };

    enum class CurrencySign {
        Standard,
        Accounting,
    };

    enum class UnitDisplay {
        Short,
        Narrow,
        Long,
    };

    enum class RoundingType {
        Invalid,
        SignificantDigits,
        FractionDigits,
        CompactRounding,
    };

    enum class Notation {
        Invalid,
        Standard,
        Scientific,
        Engineering,
        Compact,
    };

    enum class CompactDisplay {
        Short,
        Long,
    };

    enum class SignDisplay {
        Invalid,
        Auto,
        Never,
        Always,
        ExceptZero,
    };

    static Vector<StringView> const& relevant_extension_keys(); // [[RelevantExtensionKeys]]

    NumberFormat(Object& prototype);
    virtual ~NumberFormat() override = default;

    String const& locale() const { return m_locale; }
    void set_locale(String locale) { m_locale = move(locale); }

    String const& data_locale() const { return m_data_locale; }
    void set_data_locale(String data_locale) { m_data_locale = move(data_locale); }

    String const& numbering_system() const { return m_numbering_system; }
    void set_numbering_system(String numbering_system) { m_numbering_system = move(numbering_system); }

    Style style() const { return m_style; }
    StringView style_string() const;
    void set_style(StringView style);

    bool has_currency() const { return m_currency.has_value(); }
    String const& currency() const { return m_currency.value(); }
    void set_currency(String currency) { m_currency = move(currency); }

    bool has_currency_display() const { return m_currency_display.has_value(); }
    CurrencyDisplay currency_display() const { return *m_currency_display; }
    StringView currency_display_string() const;
    void set_currency_display(StringView currency_display);

    bool has_currency_sign() const { return m_currency_sign.has_value(); }
    CurrencySign currency_sign() const { return *m_currency_sign; }
    StringView currency_sign_string() const;
    void set_currency_sign(StringView set_currency_sign);

    bool has_unit() const { return m_unit.has_value(); }
    String const& unit() const { return m_unit.value(); }
    void set_unit(String unit) { m_unit = move(unit); }

    bool has_unit_display() const { return m_unit_display.has_value(); }
    UnitDisplay unit_display() const { return *m_unit_display; }
    StringView unit_display_string() const;
    void set_unit_display(StringView unit_display);

    int min_integer_digits() const { return m_min_integer_digits; }
    void set_min_integer_digits(int min_integer_digits) { m_min_integer_digits = min_integer_digits; }

    bool has_min_fraction_digits() const { return m_min_fraction_digits.has_value(); }
    int min_fraction_digits() const { return *m_min_fraction_digits; }
    void set_min_fraction_digits(int min_fraction_digits) { m_min_fraction_digits = min_fraction_digits; }

    bool has_max_fraction_digits() const { return m_max_fraction_digits.has_value(); }
    int max_fraction_digits() const { return *m_max_fraction_digits; }
    void set_max_fraction_digits(int max_fraction_digits) { m_max_fraction_digits = max_fraction_digits; }

    bool has_min_significant_digits() const { return m_min_significant_digits.has_value(); }
    int min_significant_digits() const { return *m_min_significant_digits; }
    void set_min_significant_digits(int min_significant_digits) { m_min_significant_digits = min_significant_digits; }

    bool has_max_significant_digits() const { return m_max_significant_digits.has_value(); }
    int max_significant_digits() const { return *m_max_significant_digits; }
    void set_max_significant_digits(int max_significant_digits) { m_max_significant_digits = max_significant_digits; }

    bool use_grouping() const { return m_use_grouping; }
    void set_use_grouping(bool use_grouping) { m_use_grouping = use_grouping; }

    RoundingType rounding_type() const { return m_rounding_type; }
    StringView rounding_type_string() const;
    void set_rounding_type(RoundingType rounding_type) { m_rounding_type = rounding_type; }

    Notation notation() const { return m_notation; }
    StringView notation_string() const;
    void set_notation(StringView notation);

    bool has_compact_display() const { return m_compact_display.has_value(); }
    CompactDisplay compact_display() const { return *m_compact_display; }
    StringView compact_display_string() const;
    void set_compact_display(StringView compact_display);

    SignDisplay sign_display() const { return m_sign_display; }
    StringView sign_display_string() const;
    void set_sign_display(StringView sign_display);

private:
    String m_locale;                                        // [[Locale]]
    String m_data_locale;                                   // [[DataLocale]]
    String m_numbering_system;                              // [[NumberingSystem]]
    Style m_style { Style::Invalid };                       // [[Style]]
    Optional<String> m_currency {};                         // [[Currency]]
    Optional<CurrencyDisplay> m_currency_display {};        // [[CurrencyDisplay]]
    Optional<CurrencySign> m_currency_sign {};              // [[CurrencySign]]
    Optional<String> m_unit {};                             // [[Unit]]
    Optional<UnitDisplay> m_unit_display {};                // [[UnitDisplay]]
    int m_min_integer_digits { 0 };                         // [[MinimumIntegerDigits]]
    Optional<int> m_min_fraction_digits {};                 // [[MinimumFractionDigits]]
    Optional<int> m_max_fraction_digits {};                 // [[MaximumFractionDigits]]
    Optional<int> m_min_significant_digits {};              // [[MinimumSignificantDigits]]
    Optional<int> m_max_significant_digits {};              // [[MaximumSignificantDigits]]
    bool m_use_grouping { false };                          // [[UseGrouping]]
    RoundingType m_rounding_type { RoundingType::Invalid }; // [[RoundingType]]
    Notation m_notation { Notation::Invalid };              // [[Notation]]
    Optional<CompactDisplay> m_compact_display {};          // [[CompactDisplay]]
    SignDisplay m_sign_display { SignDisplay::Invalid };    // [[SignDisplay]]
};

ThrowCompletionOr<void> set_number_format_digit_options(GlobalObject& global_object, NumberFormat& intl_object, Object const& options, int default_min_fraction_digits, int default_max_fraction_digits, NumberFormat::Notation notation);
ThrowCompletionOr<NumberFormat*> initialize_number_format(GlobalObject& global_object, NumberFormat& number_format, Value locales_value, Value options_value);
int currency_digits(StringView currency);
ThrowCompletionOr<void> set_number_format_unit_options(GlobalObject& global_object, NumberFormat& intl_object, Object const& options);

}