/*

 * 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 Resolution {

public:

    enum class Type {

        Dpi,

        Dpcm,

        Dppx,

    };

    static Optional<Type> unit_from_name(StringView);

    Resolution(double value, Type type);

    static Resolution make_dots_per_pixel(double);

    String to_string() const;

    double to_dots_per_pixel() const;

    Type type() const { return m_type; }

    double raw_value() const { return m_value; }

    StringView unit_name() const;

    bool operator==(Resolution const& other) const

    {

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

    }

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

    {

        auto this_dots_per_pixel = to_dots_per_pixel();

        auto other_dots_per_pixel = other.to_dots_per_pixel();

        if (this_dots_per_pixel < other_dots_per_pixel)

            return -1;

        if (this_dots_per_pixel > other_dots_per_pixel)

            return 1;

        return 0;

    }

private:

    Type m_type;

    double m_value { 0 };

};

}