/*
 *   SPDX-FileCopyrightText: 2013 Lukas Appelhans <l.appelhans@gmx.de>
 *
 *   SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
 */
#pragma once

#include "PackageKitBackend.h"
#include <PackageKit/Transaction>
#include <resources/AbstractBackendUpdater.h>

class SystemUpgrade;

struct EulaHandling {
    std::function<PackageKit::Transaction *()> proceedFunction;
    bool request = false;
};
EulaHandling handleEula(const QString &eulaID, const QString &licenseAgreement);
int percentageWithStatus(PackageKit::Transaction::Status status, uint percentage);

class PackageKitUpdater : public AbstractBackendUpdater
{
    Q_OBJECT
public:
    explicit PackageKitUpdater(PackageKitBackend *parent = nullptr);
    ~PackageKitUpdater() override;

    void prepare() override;
    void checkFreeSpace();

    bool hasUpdates() const override;
    qreal progress() const override;

    void setProgressing(bool progressing);

    void removeResources(const QList<AbstractResource *> &apps) override;
    void addResources(const QList<AbstractResource *> &apps) override;
    QList<AbstractResource *> toUpdate() const override;
    bool isMarked(AbstractResource *res) const override;
    QDateTime lastUpdate() const override;
    bool isCancelable() const override;
    bool isProgressing() const override;
    void fetchChangelog() const override;
    double updateSize() const override;
    quint64 downloadSpeed() const override;

    void proceed() override;
    void setOfflineUpdates(bool use) override;

public Q_SLOTS:
    /// must be implemented if ever isCancelable is true
    void cancel() override;
    void start() override;

private Q_SLOTS:
    void errorFound(PackageKit::Transaction::Error err, const QString &error);
    void mediaChange(PackageKit::Transaction::MediaType media, const QString &type, const QString &text);
    void eulaRequired(const QString &eulaID, const QString &packageID, const QString &vendor, const QString &licenseAgreement);
    void finished(PackageKit::Transaction::Exit exit, uint);
    void cancellableChanged();
    void percentageChanged();
    void updateDetail(const QString &packageID,
                      const QStringList &updates,
                      const QStringList &obsoletes,
                      const QStringList &vendorUrls,
                      const QStringList &bugzillaUrls,
                      const QStringList &cveUrls,
                      PackageKit::Transaction::Restart restart,
                      const QString &updateText,
                      const QString &changelog,
                      PackageKit::Transaction::UpdateState state,
                      const QDateTime &issued,
                      const QDateTime &updated);
    void packageResolved(PackageKit::Transaction::Info info, const QString &packageId);
    void repoSignatureRequired(const QString &packageID,
                               const QString &repoName,
                               const QString &keyUrl,
                               const QString &keyUserid,
                               const QString &keyId,
                               const QString &keyFingerprint,
                               const QString &keyTimestamp,
                               PackageKit::Transaction::SigType type);

private:
    void processProceedFunction();
    void itemProgress(const QString &itemID, PackageKit::Transaction::Status status, uint percentage);
    void fetchLastUpdateTime();
    void lastUpdateTimeReceived(QDBusPendingCallWatcher *w);
    void setupTransaction(PackageKit::Transaction::TransactionFlags flags);
    bool useOfflineUpdates() const;

    QSet<QString> involvedPackages(const QSet<AbstractResource *> &packages) const;
    QSet<AbstractResource *> packagesForPackageId(const QSet<QString> &packages) const;

    QPointer<PackageKit::Transaction> m_transaction;
    PackageKitBackend *const m_backend;
    QSet<AbstractResource *> m_toUpgrade;
    QSet<AbstractResource *> m_allUpgradeable;
    bool m_isCancelable;
    bool m_isProgressing;
    bool m_useOfflineUpdates = false;
    int m_percentage;
    QDateTime m_lastUpdate;
    QMap<PackageKit::Transaction::Info, QStringList> m_packagesModified;
    QVector<std::function<PackageKit::Transaction *()>> m_proceedFunctions;

    SystemUpgrade *m_upgrade = nullptr;
};
