/*
 * Copyright (C) 2024 Samuel Weinig <sam@webkit.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include <WebCore/CSSPosition.h>
#include <WebCore/CSSPrimitiveNumericTypes.h>

namespace WebCore {
namespace CSS {

using RaySize = Variant<Keyword::ClosestCorner, Keyword::ClosestSide, Keyword::FarthestCorner, Keyword::FarthestSide, Keyword::Sides>;

// ray() = ray( <angle> && <ray-size>? && contain? && [at <position>]? )
// <ray-size> = closest-side | closest-corner | farthest-side | farthest-corner | sides
// https://drafts.fxtf.org/motion-1/#ray-function
struct Ray {
    Angle<> angle;
    RaySize size;
    std::optional<Keyword::Contain> contain;
    std::optional<Position> position;

    bool operator==(const Ray&) const = default;
};
using RayFunction = FunctionNotation<CSSValueRay, Ray>;

template<size_t I> const auto& get(const Ray& value)
{
    if constexpr (!I)
        return value.angle;
    else if constexpr (I == 1)
        return value.size;
    else if constexpr (I == 2)
        return value.contain;
    else if constexpr (I == 3)
        return value.position;
}

template<> struct Serialize<Ray> { void operator()(StringBuilder&, const SerializationContext&, const Ray&); };

} // namespace CSS
} // namespace WebCore

DEFINE_TUPLE_LIKE_CONFORMANCE(WebCore::CSS::Ray, 4)
