/* This file is part of the KDE project

   Copyright (C) 2004 Dario Massarin <nekkar@libero.it>

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
*/


#ifndef METALINK_H
#define METALINK_H

#include <KIO/Job>

#include "core/datasourcefactory.h"
#include "core/transfer.h"

#include "ui/metalinkcreator/metalinker.h"


class Metalink : public Transfer
{
    Q_OBJECT

    public:
        Metalink(TransferGroup * parent, TransferFactory * factory,
                    Scheduler * scheduler, const KUrl & src, const KUrl & dest,
                    const QDomElement * e = 0);

        ~Metalink();

        void save(const QDomElement &element);
        void load(const QDomElement *e);

        /**
         * Reimplemented to return a time based on the average of the last three speeds
         */
        int remainingTime() const;

        bool repair(const KUrl &file = KUrl());

        /**
         * Move the download to the new destination
         * @param newDirectory is a directory where the download should be stored
         * @returns true if newDestination can be used
         */
        virtual bool setDirectory(const KUrl &newDirectory);

        QHash<KUrl, QPair<bool, int> > availableMirrors(const KUrl &file) const;
        void setAvailableMirrors(const KUrl &file, const QHash<KUrl, QPair<bool, int> > &mirrors);

        /**
         * @param file for which to get the verifier
         * @return Verifier that allows you to add checksums manually verify a file etc.
         */
        virtual Verifier *verifier(const KUrl &file);

        /**
         * @param file for which to get the signature
         * @return Signature that allows you to add signatures and verify them
         */
        virtual Signature *signature(const KUrl &file);

        virtual QList<KUrl> files() const;

        FileModel *fileModel();

    public Q_SLOTS:
        // --- Job virtual functions ---
        void start();
        void stop();

        void deinit(Transfer::DeleteOptions options);

    private Q_SLOTS:
        /**
         * @return true if initialising worked
         * @note false does not mean that an error happened, it could mean, that the user
         * decided to update the metalink
         */
        bool metalinkInit(const KUrl &url = KUrl(), const QByteArray &data = QByteArray());

        void fileDlgFinished(int result);
        /**
         * Checks if the ticked (not started yet) files exist already on the hd and asks
         * the user how to proceed in that case. Also calls the according DataSourceFactories
         * setDoDownload(bool) methods.
         */
        void filesSelected();
        void slotUpdateCapabilities();
        void slotDataSourceFactoryChange(Transfer::ChangesFlags change);
        void slotRename(const KUrl &oldUrl, const KUrl &newUrl);
        void slotVerified(bool isVerified);
        void slotSignatureVerified();

    private :
        void downloadMetalink();
        void startMetalink();
        void untickAllFiles();
        void recalculateTotalSize(DataSourceFactory *sender);
        void recalculateProcessedSize();
        void recalculateSpeed();
        void updateStatus(DataSourceFactory *sender, bool *changeStatus);

    private:
        FileModel *m_fileModel;
        int m_currentFiles;
        bool m_metalinkJustDownloaded;
        KUrl m_localMetalinkLocation;
        KGetMetalink::Metalink m_metalink;
        QHash<KUrl, DataSourceFactory*> m_dataSourceFactory;
        bool m_ready;
        int m_speedCount;
        int m_tempAverageSpeed;
        mutable int m_averageSpeed;
        int m_numFilesSelected;//The number of files that are ticked and should be downloaded
};

#endif