/*
 * Copyright (C) by Olivier Goffart <ogoffart@owncloud.com>
 * Copyright (C) by Klaas Freitag <freitag@owncloud.com>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
 * for more details.
 */

#pragma once

#include "propagatorjobs.h"

namespace Mirall {

class PropagateUploadFileLegacy: public PropagateNeonJob {
    Q_OBJECT
public:
    explicit PropagateUploadFileLegacy(OwncloudPropagator* propagator,const SyncFileItem& item)
        : PropagateNeonJob(propagator, item)
        , _chunked_done(0), _chunked_total_size(0), _previousFileSize(0) {}
    void start() Q_DECL_OVERRIDE;
private:
    // Log callback for httpbf
    static void _log_callback(const char *func, const char *text, void*)
    {
        qDebug() << "  " << func << text;
    }

    // abort callback for httpbf
    static int _user_want_abort(void *userData)
    {
        return  static_cast<PropagateUploadFileLegacy *>(userData)->_propagator->_abortRequested.fetchAndAddRelaxed(0);
    }

    // callback from httpbf when a chunk is finished
    static void chunk_finished_cb(hbf_transfer_s *trans, int chunk, void* userdata);
    static void notify_status_cb(void* userdata, ne_session_status status,
                                    const ne_session_status_info* info);

    qint64 _chunked_done; // amount of bytes already sent with the previous chunks
    qint64 _chunked_total_size; // total size of the whole file
    qint64 _previousFileSize;   // In case the file size has changed during upload, this is the previous one.
};

class PropagateDownloadFileLegacy: public PropagateNeonJob {
    Q_OBJECT
public:
    explicit PropagateDownloadFileLegacy(OwncloudPropagator* propagator,const SyncFileItem& item)
        : PropagateNeonJob(propagator, item), _file(0), _resumeStart(0) {}
    void start() Q_DECL_OVERRIDE;
private:
    QFile *_file;
    QScopedPointer<ne_decompress, ScopedPointerHelpers> _decompress;
    QString errorString;
    QByteArray _expectedEtagForResume;
    quint64 _resumeStart;

    static int do_not_accept (void *userdata, ne_request *req, const ne_status *st)
    {
        Q_UNUSED(userdata); Q_UNUSED(req); Q_UNUSED(st);
        return 0; // ignore this response
    }

    static int do_not_download_content_reader(void *userdata, const char *buf, size_t len)
    {
        Q_UNUSED(userdata); Q_UNUSED(buf); Q_UNUSED(len);
        return NE_ERROR;
    }

    // neon hooks:
    static int content_reader(void *userdata, const char *buf, size_t len);
    static void install_content_reader( ne_request *req, void *userdata, const ne_status *status );
    static void notify_status_cb(void* userdata, ne_session_status status,
                                    const ne_session_status_info* info);

    /** To be called from install_content_reader if we want to abort the transfer */
    void abortTransfer(ne_request *req, const QString &error);
};

}