/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef DOWNLOADMANAGER_H
#define DOWNLOADMANAGER_H

#include "ui_downloads.h"
#include "ui_downloaditem.h"

#include <QtCore/QFileInfo>
#include <QtCore/QTime>
#include <QtCore/QUrl>

#include <QWebEngineDownloadItem>

class DownloadManager;
class DownloadWidget : public QWidget, public Ui_DownloadItem
{
    Q_OBJECT

signals:
    void statusChanged();

public:
    DownloadWidget(QWebEngineDownloadItem *download, QWidget *parent = 0);
    bool downloading() const;
    bool downloadedSuccessfully() const;

    void init();
    bool getFileName(bool promptForFileName = false);

private slots:
    void stop();
    void open();

    void downloadProgress(qint64 bytesReceived, qint64 bytesTotal);
    void finished();

private:
    friend class DownloadManager;
    void updateInfoLabel();
    QString dataString(int size) const;

    QUrl m_url;
    QFileInfo m_file;
    qint64 m_bytesReceived;
    QTime m_downloadTime;
    bool m_stopped;

    QScopedPointer<QWebEngineDownloadItem> m_download;
};

class AutoSaver;
class DownloadModel;
QT_BEGIN_NAMESPACE
class QFileIconProvider;
QT_END_NAMESPACE

class DownloadManager : public QDialog, public Ui_DownloadDialog
{
    Q_OBJECT
    Q_PROPERTY(RemovePolicy removePolicy READ removePolicy WRITE setRemovePolicy)

public:
    enum RemovePolicy {
        Never,
        Exit,
        SuccessFullDownload
    };
    Q_ENUM(RemovePolicy)

    DownloadManager(QWidget *parent = 0);
    ~DownloadManager();
    int activeDownloads() const;

    RemovePolicy removePolicy() const;
    void setRemovePolicy(RemovePolicy policy);

public slots:
    void download(QWebEngineDownloadItem *download);
    void cleanup();

private slots:
    void save() const;
    void updateRow();

private:
    void addItem(DownloadWidget *item);
    void updateItemCount();
    void load();

    AutoSaver *m_autoSaver;
    DownloadModel *m_model;
    QFileIconProvider *m_iconProvider;
    QList<DownloadWidget*> m_downloads;
    RemovePolicy m_removePolicy;
    friend class DownloadModel;
};

class DownloadModel : public QAbstractListModel
{
    friend class DownloadManager;
    Q_OBJECT

public:
    DownloadModel(DownloadManager *downloadManager, QObject *parent = 0);
    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
    int rowCount(const QModelIndex &parent = QModelIndex()) const;
    bool removeRows(int row, int count, const QModelIndex &parent = QModelIndex());

private:
    DownloadManager *m_downloadManager;

};

#endif // DOWNLOADMANAGER_H