/*

    SPDX-FileCopyrightText: 2016 Volker Krause <vkrause@kde.org>

    SPDX-FileCopyrightText: 2024 Jonathan Poelen <jonathan.poelen@gmail.com>

    SPDX-License-Identifier: MIT

*/

#include "contextswitch_p.h"

#include "definition_p.h"

#include "ksyntaxhighlighting_logging.h"

#include <QStringTokenizer>

using namespace KSyntaxHighlighting;

void ContextSwitch::resolve(DefinitionData &def, QStringView context)

{

    if (context.isEmpty() || context == QStringLiteral("#stay")) {

        return;

    }

    while (context.startsWith(QStringLiteral("#pop"))) {

        ++m_popCount;

        if (context.size() > 4 && context.at(4) == QLatin1Char('!')) {

            context = context.sliced(5);

            break;

        }

        context = context.sliced(4);

    }

    m_isStay = !m_popCount;

    if (context.isEmpty()) {

        return;

    }

    for (auto contextPart : QStringTokenizer{context, u'!'}) {

        const qsizetype defNameIndex = contextPart.indexOf(QStringLiteral("##"));

        auto defName = (defNameIndex <= -1) ? QStringView() : contextPart.sliced(defNameIndex + 2);

        auto contextName = (defNameIndex <= -1) ? contextPart : contextPart.sliced(0, defNameIndex);

        auto resolvedCtx = def.resolveIncludedContext(defName, contextName);

        if (resolvedCtx.context) {

            m_contexts.append(resolvedCtx.context);

        } else {

            auto part = (defName.isEmpty() || resolvedCtx.def) ? "context" : "definition in";

            qCWarning(Log) << "cannot find" << part << contextPart << "in" << def.name;

        }

    }

    m_isStay = m_contexts.isEmpty();

}