/*

 * Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>

 * Copyright (c) 2022, Andreas Kling <kling@serenityos.org>

 *

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

 */

#include <LibJS/Runtime/Realm.h>

#include <LibWeb/Bindings/CSSMediaRulePrototype.h>

#include <LibWeb/Bindings/Intrinsics.h>

#include <LibWeb/CSS/CSSMediaRule.h>

namespace Web::CSS {

JS_DEFINE_ALLOCATOR(CSSMediaRule);

JS::NonnullGCPtr<CSSMediaRule> CSSMediaRule::create(JS::Realm& realm, MediaList& media_queries, CSSRuleList& rules)

{

    return realm.heap().allocate<CSSMediaRule>(realm, realm, media_queries, rules);

}

CSSMediaRule::CSSMediaRule(JS::Realm& realm, MediaList& media, CSSRuleList& rules)

    : CSSConditionRule(realm, rules)

    , m_media(media)

{

}

void CSSMediaRule::initialize(JS::Realm& realm)

{

    Base::initialize(realm);

    WEB_SET_PROTOTYPE_FOR_INTERFACE(CSSMediaRule);

}

void CSSMediaRule::visit_edges(Cell::Visitor& visitor)

{

    Base::visit_edges(visitor);

    visitor.visit(m_media);

}

String CSSMediaRule::condition_text() const

{

    return m_media->media_text();

}

// https://www.w3.org/TR/cssom-1/#serialize-a-css-rule

String CSSMediaRule::serialized() const

{

    // The result of concatenating the following:

    StringBuilder builder;

    // 1. The string "@media", followed by a single SPACE (U+0020).

    builder.append("@media "sv);

    // 2. The result of performing serialize a media query list on rule’s media query list.

    builder.append(condition_text());

    // 3. A single SPACE (U+0020), followed by the string "{", i.e., LEFT CURLY BRACKET (U+007B), followed by a newline.

    builder.append(" {\n"sv);

    // 4. The result of performing serialize a CSS rule on each rule in the rule’s cssRules list,

    //    filtering out empty strings, indenting each item with two spaces, all joined with newline.

    for (size_t i = 0; i < css_rules().length(); i++) {

        auto rule = css_rules().item(i);

        auto result = rule->css_text();

        if (result.is_empty())

            continue;

        builder.append("  "sv);

        builder.append(result);

        builder.append('\n');

    }

    // 5. A newline, followed by the string "}", i.e., RIGHT CURLY BRACKET (U+007D)

    // AD-HOC: All modern browsers omit the ending newline if there are no CSS rules, so let's do the same.

    //         If there are rules, the required newline will be appended in the for-loop above.

    builder.append('}');

    return MUST(builder.to_string());

}

}