/*
 * Copyright (C) by Olivier Goffart <ogoffart@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.
 */

#include "propagateremotedelete.h"
#include "owncloudpropagator_p.h"
#include "account.h"
#include "common/asserts.h"

#include <QLoggingCategory>

namespace OCC {

Q_LOGGING_CATEGORY(lcDeleteJob, "sync.networkjob.delete", QtInfoMsg)
Q_LOGGING_CATEGORY(lcPropagateRemoteDelete, "sync.propagator.remotedelete", QtInfoMsg)

DeleteJob::DeleteJob(AccountPtr account, const QString &path, QObject *parent)
    : AbstractNetworkJob(account, path, parent)
{
}

DeleteJob::DeleteJob(AccountPtr account, const QUrl &url, QObject *parent)
    : AbstractNetworkJob(account, QString(), parent)
    , _url(url)
{
}

void DeleteJob::start()
{
    QNetworkRequest req;
    if (_url.isValid()) {
        sendRequest("DELETE", _url, req);
    } else {
        sendRequest("DELETE", makeDavUrl(path()), req);
    }

    if (reply()->error() != QNetworkReply::NoError) {
        qCWarning(lcDeleteJob) << " Network error: " << reply()->errorString();
    }
    AbstractNetworkJob::start();
}

bool DeleteJob::finished()
{
    qCInfo(lcDeleteJob) << "DELETE of" << reply()->request().url() << "FINISHED WITH STATUS"
                        << reply()->error()
                        << (reply()->error() == QNetworkReply::NoError ? QLatin1String("") : errorString());

    emit finishedSignal();
    return true;
}

void PropagateRemoteDelete::start()
{
    if (propagator()->_abortRequested.fetchAndAddRelaxed(0))
        return;

    qCDebug(lcPropagateRemoteDelete) << _item->_file;

    _job = new DeleteJob(propagator()->account(),
        propagator()->_remoteFolder + _item->_file,
        this);
    connect(_job.data(), &DeleteJob::finishedSignal, this, &PropagateRemoteDelete::slotDeleteJobFinished);
    propagator()->_activeJobList.append(this);
    _job->start();
}

void PropagateRemoteDelete::abort()
{
    if (_job && _job->reply())
        _job->reply()->abort();
}

void PropagateRemoteDelete::slotDeleteJobFinished()
{
    propagator()->_activeJobList.removeOne(this);

    ASSERT(_job);

    QNetworkReply::NetworkError err = _job->reply()->error();
    const int httpStatus = _job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
    _item->_httpErrorCode = httpStatus;

    if (err != QNetworkReply::NoError && err != QNetworkReply::ContentNotFoundError) {
        if (checkForProblemsWithShared(_item->_httpErrorCode,
                tr("The file has been removed from a read only share. It was restored."))) {
            return;
        }

        SyncFileItem::Status status = classifyError(err, _item->_httpErrorCode,
            &propagator()->_anotherSyncNeeded);
        done(status, _job->errorString());
        return;
    }

    _item->_responseTimeStamp = _job->responseTimestamp();

    // A 404 reply is also considered a success here: We want to make sure
    // a file is gone from the server. It not being there in the first place
    // is ok. This will happen for files that are in the DB but not on
    // the server or the local file system.
    if (httpStatus != 204 && httpStatus != 404) {
        // Normally we expect "204 No Content"
        // If it is not the case, it might be because of a proxy or gateway intercepting the request, so we must
        // throw an error.
        done(SyncFileItem::NormalError,
            tr("Wrong HTTP code returned by server. Expected 204, but received \"%1 %2\".")
                .arg(_item->_httpErrorCode)
                .arg(_job->reply()->attribute(QNetworkRequest::HttpReasonPhraseAttribute).toString()));
        return;
    }

    propagator()->_journal->deleteFileRecord(_item->_originalFile, _item->isDirectory());
    propagator()->_journal->commit("Remote Remove");
    done(SyncFileItem::Success);
}
}