/*
 * Copyright (C) 2026 saku
 * Copyright (C) 2026 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,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * 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.
 */

#include "config.h"
#include "StyleCustomIdent.h"

#include "CSSCustomIdentValue.h"
#include "CSSMarkup.h"
#include "DeprecatedCSSOMValue.h"
#include "StyleBuilderChecking.h"
#include "StylePrimitiveNumericTypes+Conversions.h"
#include <wtf/text/StringBuilder.h>
#include <wtf/text/TextStream.h>

namespace WebCore {
namespace Style {

// MARK: - Conversion

auto ToCSS<CustomIdent>::operator()(const CustomIdent& value, const Style::ComputedStyle&) -> CSS::CustomIdent
{
    return { .value = value.value };
}

auto ToStyle<CSS::CustomIdent>::operator()(const CSS::CustomIdent& value, const BuilderState& state) -> CustomIdent
{
    return WTF::switchOn(value.value,
        [&](const AtomString& resolved) -> CustomIdent {
            return { .value = resolved };
        },
        [&](const CSS::IdentFunction& function) -> CustomIdent {
            // https://drafts.csswg.org/css-values-5/#ident
            // Concatenate the arguments in order: strings and idents contribute their
            // codepoints, integers are serialized as the shortest base-10 representation.
            StringBuilder builder;
            for (auto& argument : function.parameters) {
                WTF::switchOn(argument,
                    [&](const CSS::IdentFunctionIdent& ident) {
                        builder.append(ident.value);
                    },
                    [&](const CSS::String& string) {
                        builder.append(string.value);
                    },
                    [&](const CSS::Integer<>& integer) {
                        builder.append(toStyle(integer, state).value);
                    }
                );
            }
            return { .value = builder.toAtomString() };
        }
    );
}

Ref<CSSValue> CSSValueCreation<CustomIdent>::operator()(CSSValuePool& pool, const Style::ComputedStyle& style, const CustomIdent& value)
{
    return CSS::createCSSValue(pool, toCSS(value, style));
}

auto CSSValueConversion<CustomIdent>::operator()(BuilderState& state, const CSSCustomIdentValue& value) -> CustomIdent
{
    return toStyle(value.customIdent(), state);
}

auto CSSValueConversion<CustomIdent>::operator()(BuilderState& state, const CSSValue& value) -> CustomIdent
{
    if (RefPtr customIdentValue = requiredDowncast<CSSCustomIdentValue>(state, value))
        return toStyle(customIdentValue->customIdent(), state);
    return { .value = nullAtom() };
}

Ref<DeprecatedCSSOMValue> DeprecatedCSSOMValueCreation<CustomIdent>::operator()(CSSValuePool& pool, const Style::ComputedStyle& style, CSSStyleDeclaration& owner, const CustomIdent& value)
{
    return CSS::createDeprecatedCSSOMValue(pool, owner, toCSS(value, style));
}

// MARK: - Serialization

void Serialize<CustomIdent>::operator()(StringBuilder& builder, const CSS::SerializationContext&, const Style::ComputedStyle&, const CustomIdent& value)
{
    WebCore::serializeIdentifier(builder, value.value);
}

// MARK: - Logging

TextStream& operator<<(TextStream& ts, const CustomIdent& value)
{
    return ts << value.value;
}

// MARK: - Hashing

void add(Hasher& hasher, const CustomIdent& value)
{
    add(hasher, value.value);
}

} // namespace Style
} // namespace WebCore
