// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#include "qtwebenginecoreglobal_p.h"

#include <QGuiApplication>
#if QT_CONFIG(opengl)
# include <QOpenGLContext>
#endif
#include <QThread>
#include <QQuickWindow>
#include "web_engine_context.h"
#include "web_engine_library_info.h"

#include "base/base_paths.h"
#include "base/i18n/icu_util.h"
#include "base/path_service.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"

#if QT_CONFIG(opengl) && !defined(Q_OS_MACOS)
QT_BEGIN_NAMESPACE
Q_GUI_EXPORT void qt_gl_set_global_share_context(QOpenGLContext *context);
Q_GUI_EXPORT QOpenGLContext *qt_gl_global_share_context();
QT_END_NAMESPACE
#endif

namespace QtWebEngineCore {
#if QT_CONFIG(opengl) && !defined(Q_OS_MACOS)
static QOpenGLContext *shareContext;

static void deleteShareContext()
{
    if (qt_gl_global_share_context() == shareContext)
        qt_gl_set_global_share_context(nullptr);
    delete shareContext;
    shareContext = 0;
}

#endif
// ### Qt 6: unify this logic and Qt::AA_ShareOpenGLContexts.
// QtWebEngineQuick::initialize was introduced first and meant to be called
// after the QGuiApplication creation, when AA_ShareOpenGLContexts fills
// the same need but the flag has to be set earlier.

Q_WEBENGINECORE_EXPORT void initialize()
{
#if QT_CONFIG(opengl) && !defined(Q_OS_MACOS)
#ifdef Q_OS_WIN32
    qputenv("QT_D3DCREATE_MULTITHREADED", "1");
#endif
    auto api = QQuickWindow::graphicsApi();
    if (api != QSGRendererInterface::OpenGL
#if QT_VERSION >= QT_VERSION_CHECK(6, 4, 0)
        && api != QSGRendererInterface::Vulkan && api != QSGRendererInterface::Metal
        && api != QSGRendererInterface::Direct3D11
#endif
    )
        QQuickWindow::setGraphicsApi(QSGRendererInterface::OpenGL);
    // No need to override the shared context if QApplication already set one (e.g with Qt::AA_ShareOpenGLContexts).
    if (!qt_gl_global_share_context()) {

        QCoreApplication *app = QCoreApplication::instance();
        if (!app) {
            qFatal("QtWebEngineQuick::initialize() but no core application instance.");
            return;
        }

        // Bail out silently if the user did not construct a QGuiApplication.
        if (!qobject_cast<QGuiApplication *>(app))
            return;

        if (app->thread() != QThread::currentThread()) {
            qFatal("QtWebEngineQuick::initialize() must be called from the Qt gui thread.");
            return;
        }

        if (shareContext)
            return;

        shareContext = new QOpenGLContext;
        QSurfaceFormat format = QSurfaceFormat::defaultFormat();

        shareContext->setFormat(format);
        shareContext->create();
        qAddPostRoutine(deleteShareContext);
        qt_gl_set_global_share_context(shareContext);

        // Classes like QOpenGLWidget check for the attribute
        app->setAttribute(Qt::AA_ShareOpenGLContexts);
    }

#endif // QT_CONFIG(opengl) && !defined(Q_OS_MACOS)
}

bool closingDown()
{
    return WebEngineContext::closingDown();
}

} // namespace QtWebEngineCore

#if defined(Q_OS_WIN)
namespace QtWebEngineSandbox {
sandbox::SandboxInterfaceInfo *staticSandboxInterfaceInfo(sandbox::SandboxInterfaceInfo *info)
{
    static sandbox::SandboxInterfaceInfo *g_info = nullptr;
    if (info) {
        Q_ASSERT(g_info == nullptr);
        g_info = info;
    }
    return g_info;
}
} //namespace
#endif
static void initialize()
{
#if QT_CONFIG(opengl) && !defined(Q_OS_MACOS)
    // QCoreApplication is not yet instantiated, ensuring the call will be deferred
    qAddPreRoutine(QtWebEngineCore::initialize);
#endif // QT_CONFIG(opengl)
}

QT_BEGIN_NAMESPACE

QString qWebEngineGetDomainAndRegistry(const QUrl &url) {
    base::FilePath icuDataPath;
    // Let's assume that ICU is already initialized if DIR_QT_LIBRARY_DATA is set.
    if (!base::PathService::Get(base::DIR_QT_LIBRARY_DATA, &icuDataPath)) {
        icuDataPath = WebEngineLibraryInfo::getPath(base::DIR_QT_LIBRARY_DATA);
        if (!base::PathService::OverrideAndCreateIfNeeded(base::DIR_QT_LIBRARY_DATA, icuDataPath, false, false))
            qWarning("Failed to set ICU data path.");
        base::i18n::InitializeICU();
    }

    const QString host = url.host();
    const std::string domain = net::registry_controlled_domains::GetDomainAndRegistry(host.toStdString(), net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES);
    return QString::fromStdString(domain);
}

QT_END_NAMESPACE

Q_CONSTRUCTOR_FUNCTION(initialize)