// Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB).
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QT3DCORE_QDOWNLOADHELPERSERVICE_P_H
#define QT3DCORE_QDOWNLOADHELPERSERVICE_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of other Qt classes.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QSharedPointer>
#include <QObject>
#include <QUrl>

#include <Qt3DCore/qaspectjob.h>
#include <Qt3DCore/qt3dcore_global.h>
#include <Qt3DCore/private/qservicelocator_p.h>

QT_BEGIN_NAMESPACE

class QThread;
class QNetworkAccessManager;
class QNetworkReply;

namespace Qt3DCore {

class QAspectEngine;
class QDownloadNetworkWorker;
class QDownloadHelperService;
class QDownloadHelperServicePrivate;

class Q_3DCORESHARED_EXPORT QDownloadRequest
{
public:
    QDownloadRequest(const QUrl &url);
    virtual ~QDownloadRequest();

    QUrl url() const { return m_url; }
    bool succeeded() const { return m_succeeded; }
    bool cancelled() const { return m_cancelled; }

    virtual void onDownloaded();         // this is called in dl thread
    virtual void onCompleted() = 0;      // this is called in the aspect thread

protected:
    QUrl m_url;
    QByteArray m_data;

private:
    friend class QDownloadNetworkWorker;
    friend class QDownloadHelperService;
    bool m_succeeded;
    bool m_cancelled;
};

typedef QSharedPointer<QDownloadRequest> QDownloadRequestPtr;


class Q_3DCORESHARED_EXPORT QDownloadHelperService : public QAbstractServiceProvider
{
    Q_OBJECT
public:
    explicit QDownloadHelperService(const QString &description = QString());
    ~QDownloadHelperService();

    void submitRequest(const QDownloadRequestPtr &request);
    void cancelRequest(const QDownloadRequestPtr &request);
    void cancelAllRequests();

    static QString urlToLocalFileOrQrc(const QUrl &url);
    static bool isLocal(const QUrl &url);
    static QDownloadHelperService *getService(QAspectEngine *engine);

private:
    Q_DECLARE_PRIVATE(QDownloadHelperService)
    Q_PRIVATE_SLOT(d_func(), void _q_onRequestCompleted(const Qt3DCore::QDownloadRequestPtr &))
};

typedef QSharedPointer<QDownloadHelperService> QDownloadHelperServicePtr;

} // namespace Qt3DCore

QT_END_NAMESPACE

Q_DECLARE_METATYPE(Qt3DCore::QDownloadRequestPtr) // LCOV_EXCL_LINE

#endif // QT3DCORE_QDOWNLOADHELPERSERVICE_P_H