/*
    SPDX-FileCopyrightText: 2024 Fushan Wen <qydwhotmail@gmail.com>

    SPDX-License-Identifier: LGPL-2.1-or-later
*/

#pragma once

#include <QBindable>
#include <QDBusServiceWatcher>
#include <QQmlParserStatus>
#include <qqmlregistration.h>

namespace BusType
{
QML_ELEMENT
Q_NAMESPACE //
    enum Type {
        Session = 0,
        System,
    };
Q_ENUM_NS(Type)
}

class DBusServiceWatcher : public QObject, public QQmlParserStatus
{
    Q_OBJECT
    Q_INTERFACES(QQmlParserStatus)
    QML_ELEMENT

    Q_PROPERTY(BusType::Type busType READ busType WRITE setBusType NOTIFY busTypeChanged)
    // This property holds the watched service.
    Q_PROPERTY(QString watchedService READ watchedService WRITE setWatchedService NOTIFY watchedServiceChanged)
    // Whether the watched service is registered on D-Bus
    Q_PROPERTY(bool registered READ default NOTIFY registeredChanged BINDABLE isRegistered)

public:
    explicit DBusServiceWatcher(QObject *parent = nullptr);
    ~DBusServiceWatcher() override;

    BusType::Type busType() const;
    void setBusType(BusType::Type type);

    QBindable<bool> isRegistered() const;

    QString watchedService() const;
    void setWatchedService(const QString &service);

Q_SIGNALS:
    void busTypeChanged();
    void watchedServiceChanged();
    void registeredChanged();

private:
    void classBegin() override;
    void componentComplete() override;

    void onServiceRegistered(const QString &serviceName);
    void onServiceUnregistered(const QString &serviceName);
    void checkServiceRegistered();

    bool m_ready = false;
    QDBusServiceWatcher m_watcher;
    QPropertyNotifier m_watchedServiceNotifier;
    BusType::Type m_busType = BusType::Session;
    Q_OBJECT_BINDABLE_PROPERTY_WITH_ARGS(DBusServiceWatcher, bool, m_registered, false, &DBusServiceWatcher::registeredChanged)
};