// SPDX-FileCopyrightText: 2020 Jonah Brüchert <jbb@kaidan.im>
//
// SPDX-License-Identifier: GPL-2.0-or-later

#pragma once

#include <QWebEngineUrlRequestInterceptor>

#include <angelfishsettings.h>

#ifdef BUILD_ADBLOCK
#include <adblock.rs.h>
#include <optional>
#include <future>
#endif

class QWebEngineUrlRequestInfo;
class QQuickWebEngineProfile;

class AdblockUrlInterceptor : public QWebEngineUrlRequestInterceptor
{
    Q_OBJECT

    Q_PROPERTY(bool downloadNeeded READ downloadNeeded NOTIFY downloadNeededChanged)
    Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged)
    Q_PROPERTY(bool adblockSupported READ adblockSupported CONSTANT)

public:
    static AdblockUrlInterceptor &instance();
    ~AdblockUrlInterceptor();

    void interceptRequest(QWebEngineUrlRequestInfo &info) override;

    /// returns true when no filterlists exist
    bool downloadNeeded() const;
    Q_SIGNAL void downloadNeededChanged();

    constexpr static bool adblockSupported()
    {
#ifdef BUILD_ADBLOCK
        return true;
#endif
        return false;
    }

    bool enabled() const;
    void setEnabled(bool enabled);
    Q_SIGNAL void enabledChanged();

    /// Deletes the old adblock and creates a new one from the current filter lists.
    /// This needs to be called after lists were changed.
    void resetAdblock();

#ifdef BUILD_ADBLOCK
    Q_INVOKABLE std::vector<QString> getCosmeticFilters(const QUrl &url,
                                                        const std::vector<QString> &classes,
                                                        const std::vector<QString> &ids) const;
    Q_INVOKABLE QString getInjectedScript(const QUrl &url) const;
#endif

    Q_SIGNAL void adblockInitialized();

private:
    explicit AdblockUrlInterceptor(QObject *parent = nullptr);

#ifdef BUILD_ADBLOCK
    /// If an adblock cache is found, loads it, otherwise creates a new adblock
    /// from the current filter lists.
    rust::Box<Adblock> createOrRestoreAdblock();

    std::future<rust::Box<Adblock>> m_adblockInitFuture;
    std::optional<rust::Box<Adblock>> m_adblock;
#endif

    static QString adblockCacheLocation();
    bool m_enabled;
};

extern "C" {
void q_cdebug_adblock(const char *message);
}