/*

 * Copyright (c) 2022-2023, Sam Atkins <atkinssj@serenityos.org>

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#pragma once

#include <AK/String.h>

#include <LibWeb/Forward.h>

namespace Web::CSS {

class Frequency {

public:

    enum class Type {

        Hz,

        kHz

    };

    static Optional<Type> unit_from_name(StringView);

    Frequency(double value, Type type);

    static Frequency make_hertz(double);

    Frequency percentage_of(Percentage const&) const;

    String to_string() const;

    double to_hertz() const;

    Type type() const { return m_type; }

    double raw_value() const { return m_value; }

    StringView unit_name() const;

    bool operator==(Frequency const& other) const

    {

        return m_type == other.m_type && m_value == other.m_value;

    }

    int operator<=>(Frequency const& other) const

    {

        auto this_hertz = to_hertz();

        auto other_hertz = other.to_hertz();

        if (this_hertz < other_hertz)

            return -1;

        if (this_hertz > other_hertz)

            return 1;

        return 0;

    }

    static Frequency resolve_calculated(NonnullRefPtr<CSSMathValue> const&, Layout::Node const&, Frequency const& reference_value);

private:

    Type m_type;

    double m_value { 0 };

};

}

template<>

struct AK::Formatter<Web::CSS::Frequency> : Formatter<StringView> {

    ErrorOr<void> format(FormatBuilder& builder, Web::CSS::Frequency const& frequency)

    {

        return Formatter<StringView>::format(builder, frequency.to_string());

    }

};