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#ifndef PACKAGEMANAGERCORE_P_H
#define PACKAGEMANAGERCORE_P_H

#include "metadatajob.h"
#include "packagemanagercore.h"
#include "packagemanagercoredata.h"
#include "packagemanagerproxyfactory.h"
#include "qinstallerglobal.h"

#include "kdsysinfo.h"
#include "kdupdaterapplication.h"
#include "kdupdaterupdatefinder.h"

#include <QObject>

class KDJob;

QT_FORWARD_DECLARE_CLASS(QFile)
QT_FORWARD_DECLARE_CLASS(QFileDevice)
QT_FORWARD_DECLARE_CLASS(QFileInfo)

using namespace KDUpdater;

namespace QInstaller {

struct BinaryLayout;
class Component;
class ScriptEngine;
class ComponentModel;
class TempDirDeleter;
class InstallerCalculator;
class UninstallerCalculator;
class RemoteFileEngineHandler;

/*
    The default configuration interface implementation does call QSettings to save files for later deletion,
    though according to QSettings there should nothing be written if QSettings is not setup properly (which
    we do not in our case). Still, caused by a broken QSettings implementation at least on Linux we write an
    empty config file which resulted in QTIFW-196. To workaround the issue we now use this empty dummy class.
*/
class DummyConfigurationInterface : public KDUpdater::ConfigurationInterface
{
public:
    QVariant value(const QString &key) const
    {
        Q_UNUSED(key)
        return QVariant();
    }
    void setValue(const QString &key, const QVariant &value)
    {
        if (value.isNull())
            qDebug() << "DummyConfigurationInterface called with key:" << key << "and value:" << value;
    }
};

class PackageManagerCorePrivate : public QObject
{
    Q_OBJECT
    friend class PackageManagerCore;
    Q_DISABLE_COPY(PackageManagerCorePrivate)

public:
    enum OperationType {
        Backup,
        Perform,
        Undo
    };

    explicit PackageManagerCorePrivate(PackageManagerCore *core);
    explicit PackageManagerCorePrivate(PackageManagerCore *core, qint64 magicInstallerMaker,
        const QList<OperationBlob> &performedOperations);
    ~PackageManagerCorePrivate();

    static bool isProcessRunning(const QString &name, const QList<ProcessInfo> &processes);

    static bool performOperationThreaded(Operation *op, PackageManagerCorePrivate::OperationType type
        = PackageManagerCorePrivate::Perform);

    void initialize(const QHash<QString, QString> &params);
    bool isOfflineOnly() const;

    bool statusCanceledOrFailed() const;
    void setStatus(int status, const QString &error = QString());

    QString targetDir() const;
    QString registerPath();

    QString maintenanceToolName() const;
    QString installerBinaryPath() const;

    void writeMaintenanceConfigFiles();
    void readMaintenanceConfigFiles(const QString &targetDir);

    void writeMaintenanceTool(OperationList performedOperations);

    QString componentsXmlPath() const;
    QString configurationFileName() const;

    bool buildComponentTree(QHash<QString, Component*> &components, bool loadScript);

    void cleanUpComponentEnvironment();
    ScriptEngine *componentScriptEngine() const;
    ScriptEngine *controlScriptEngine() const;

    void clearAllComponentLists();
    void clearUpdaterComponentLists();
    QList<Component*> &replacementDependencyComponents();
    QHash<QString, QPair<Component*, Component*> > &componentsToReplace();

    void clearInstallerCalculator();
    InstallerCalculator *installerCalculator() const;

    void clearUninstallerCalculator();
    UninstallerCalculator *uninstallerCalculator() const;

    bool runInstaller();
    bool isInstaller() const;

    bool runUninstaller();
    bool isUninstaller() const;

    void runUpdater();
    bool isUpdater() const;

    bool runPackageUpdater();
    bool isPackageManager() const;

    QString replaceVariables(const QString &str) const;
    QByteArray replaceVariables(const QByteArray &str) const;

    void callBeginInstallation(const QList<Component*> &componentList);
    void stopProcessesForUpdates(const QList<Component*> &components);
    int countProgressOperations(const QList<Component*> &components);
    int countProgressOperations(const OperationList &operations);
    void connectOperationToInstaller(Operation *const operation, double progressOperationPartSize);
    void connectOperationCallMethodRequest(Operation *const operation);
    OperationList sortOperationsBasedOnComponentDependencies(const OperationList &operationList);

    Operation *createOwnedOperation(const QString &type);
    Operation *takeOwnedOperation(Operation *operation);

    Operation *createPathOperation(const QFileInfo &fileInfo, const QString &componentName);
    void registerPathsForUninstallation(const QList<QPair<QString, bool> > &pathsForUninstallation,
        const QString &componentName);

    void addPerformed(Operation *op) {
        m_performedOperationsCurrentSession.append(op);
    }

    void commitSessionOperations() {
        m_performedOperationsOld += m_performedOperationsCurrentSession;
        m_performedOperationsCurrentSession.clear();
    }

    void installComponent(Component *component, double progressOperationSize,
        bool adminRightsGained = false);

signals:
    void installationStarted();
    void installationFinished();
    void uninstallationStarted();
    void uninstallationFinished();

public:
    UpdateFinder *m_updateFinder;
    Application m_updaterApplication;

    int m_status;
    QString m_error;

    bool m_needsHardRestart;
    bool m_testChecksum;
    bool m_launchedAsRoot;
    bool m_completeUninstall;
    bool m_needToWriteMaintenanceTool;
    PackageManagerCoreData m_data;
    QHash<QString, bool> m_sharedFlags;
    QString m_installerBaseBinaryUnreplaced;

    QList<QInstaller::Component*> m_rootComponents;
    QList<QInstaller::Component*> m_rootDependencyReplacements;

    QList<QInstaller::Component*> m_updaterComponents;
    QList<QInstaller::Component*> m_updaterComponentsDeps;
    QList<QInstaller::Component*> m_updaterDependencyReplacements;

    OperationList m_ownedOperations;
    OperationList m_performedOperationsOld;
    OperationList m_performedOperationsCurrentSession;

    bool m_dependsOnLocalInstallerBinary;

private slots:
    void infoMessage(KDJob *, const QString &message) {
        emit m_core->metaJobInfoMessage(message);
    }
    void infoProgress(KDJob *, quint64 progress, quint64) {
        emit m_core->metaJobProgress(progress);
    }

    void handleMethodInvocationRequest(const QString &invokableMethodName);

private:
    void deleteMaintenanceTool();
    void registerMaintenanceTool();
    void unregisterMaintenanceTool();

    void writeMaintenanceToolBinary(QFile *const input, qint64 size, bool writeBinaryLayout);
    void writeMaintenanceToolBinaryData(QFileDevice *output, QFile *const input,
        const OperationList &performed, const BinaryLayout &layout);

    void runUndoOperations(const OperationList &undoOperations, double undoOperationProgressSize,
        bool adminRightsGained, bool deleteOperation);

    PackagesList remotePackages();
    LocalPackagesHash localInstalledPackages();
    bool fetchMetaInformationFromRepositories();
    bool addUpdateResourcesFromRepositories(bool parseChecksum);

private:
    PackageManagerCore *m_core;
    MetadataJob m_metadataJob;

    bool m_updates;
    bool m_repoFetched;
    bool m_updateSourcesAdded;
    qint64 m_magicBinaryMarker;
    bool m_componentsToInstallCalculated;

    mutable ScriptEngine *m_componentScriptEngine;
    mutable ScriptEngine *m_controlScriptEngine;
    // < name (component to replace), < replacement component, component to replace > >
    QHash<QString, QPair<Component*, Component*> > m_componentsToReplaceAllMode;
    QHash<QString, QPair<Component*, Component*> > m_componentsToReplaceUpdaterMode;

    InstallerCalculator *m_installerCalculator;
    UninstallerCalculator *m_uninstallerCalculator;

    PackageManagerProxyFactory *m_proxyFactory;

    ComponentModel *m_defaultModel;
    ComponentModel *m_updaterModel;

    QObject *m_guiObject;
    QScopedPointer<RemoteFileEngineHandler> m_remoteFileEngineHandler;

private:
    // remove once we deprecate isSelected, setSelected etc...
    void restoreCheckState();
    void storeCheckState();
    QHash<Component*, Qt::CheckState> m_coreCheckedHash;
};

} // namespace QInstaller

#endif  // PACKAGEMANAGERCORE_P_H