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#ifndef STATUSMONITOR_H
#define STATUSMONITOR_H

#include <QObject>
#include <qmailserviceaction.h>

class StatusMonitor;
class QMailServiceAction;

class StatusItem : public QObject
{
    Q_OBJECT

signals:
    void finished();
    void progressChanged(uint,uint);
    void statusChanged(const QString& message);

public:
    virtual QWidget* widget() = 0;
    virtual QPair<uint,uint> progress() const = 0;
    virtual QString status() const = 0;
};

class ServiceActionStatusItem : public StatusItem
{
    Q_OBJECT

public:
    ServiceActionStatusItem(QMailServiceAction* sa, const QString& description);
    QWidget* widget();
    QPair<uint,uint> progress() const;
    QString status() const;

private slots:
    void serviceActivityChanged(QMailServiceAction::Activity a);
    void serviceStatusChanged(const QMailServiceAction::Status& s);

private:
    QMailServiceAction* m_serviceAction;
    QString m_description;
};

#ifdef DEFINE_STATUS_MONITOR_INSTANCE
static StatusMonitor* StatusMonitorInstance();
#endif

class StatusMonitor : public QObject
{
    Q_OBJECT

public:
    static StatusMonitor* instance();
    void add(StatusItem* newItem);
    int itemCount() const;

signals:
    void added(StatusItem* s);
    void removed(StatusItem* s);
    void progressChanged(uint,uint);
    void statusChanged(const QString& msg);

private slots:
    void statusItemFinished();
    void statusItemProgressChanged();
    void statusItemDestroyed(QObject*);

private:
    StatusMonitor();
    void updateProgress();
#ifdef DEFINE_STATUS_MONITOR_INSTANCE
    friend StatusMonitor* StatusMonitorInstance();
#endif

private:
    QList<StatusItem*> m_statusItems;
};

#endif
