/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
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**
** This file is part of the QtBluetooth module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
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** accordance with the commercial license agreement provided with the
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** following information to ensure the GNU Lesser General Public License
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** $QT_END_LICENSE$
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****************************************************************************/

#include "qbluetoothdevicediscoveryagent.h"
#include "qbluetoothdevicediscoveryagent_p.h"
#include "qbluetoothaddress.h"
#include "qbluetoothuuid.h"
#include "qfunctions_winrt.h"

#include <QtCore/QLoggingCategory>
#include <QtCore/private/qeventdispatcher_winrt_p.h>

#include <wrl.h>
#include <windows.devices.enumeration.h>
#include <windows.devices.bluetooth.h>
#include <windows.foundation.collections.h>

using namespace Microsoft::WRL;
using namespace Microsoft::WRL::Wrappers;
using namespace ABI::Windows::Foundation;
using namespace ABI::Windows::Foundation::Collections;
using namespace ABI::Windows::Devices;
using namespace ABI::Windows::Devices::Bluetooth;
using namespace ABI::Windows::Devices::Enumeration;

QT_BEGIN_NAMESPACE

Q_DECLARE_LOGGING_CATEGORY(QT_BT_WINRT)

#define WARN_AND_RETURN_IF_FAILED(msg, ret) \
    if (FAILED(hr)) { \
        qCWarning(QT_BT_WINRT) << msg; \
        ret; \
    }

class QWinRTBluetoothDeviceDiscoveryWorker : public QObject
{
    Q_OBJECT
public:
    explicit QWinRTBluetoothDeviceDiscoveryWorker(QBluetoothDeviceDiscoveryAgent::DiscoveryMethods methods);
    ~QWinRTBluetoothDeviceDiscoveryWorker();
    void start();

private:
    void startDeviceDiscovery(QBluetoothDeviceDiscoveryAgent::DiscoveryMethod mode);
    void onDeviceDiscoveryFinished(IAsyncOperation<DeviceInformationCollection *> *op,
                                   QBluetoothDeviceDiscoveryAgent::DiscoveryMethod mode);
    void gatherDeviceInformation(IDeviceInformation *deviceInfo,
                                 QBluetoothDeviceDiscoveryAgent::DiscoveryMethod mode);
    void gatherMultipleDeviceInformation(IVectorView<DeviceInformation *> *devices,
                                         QBluetoothDeviceDiscoveryAgent::DiscoveryMethod mode);
    void setupLEDeviceWatcher();
    void bluetoothInfoFromDeviceIdAsync(HSTRING deviceId);
    void bluetoothInfoFromLeDeviceIdAsync(HSTRING deviceId);
    HRESULT onClassicBluetoothDeviceFoundAsync(IAsyncOperation<BluetoothDevice *> *, AsyncStatus);
    HRESULT onBluetoothLEDeviceFoundAsync(IAsyncOperation<BluetoothLEDevice *> *op, AsyncStatus status);
    void decreaseAndCheckPendingDevices();

public slots:
    void handleLeTimeout();

Q_SIGNALS:
    void deviceFound(const QBluetoothDeviceInfo &info);
    void scanFinished();
    void scanCanceled();

public:
    quint8 requestedModes;

private:
    ComPtr<IDeviceWatcher> m_leDeviceWatcher;
    EventRegistrationToken m_leDeviceAddedToken;
    int m_pendingDevices;
};

QWinRTBluetoothDeviceDiscoveryWorker::QWinRTBluetoothDeviceDiscoveryWorker(QBluetoothDeviceDiscoveryAgent::DiscoveryMethods methods)
    : requestedModes(methods)
    , m_pendingDevices(0)
{
    qRegisterMetaType<QBluetoothDeviceInfo>();
}

QWinRTBluetoothDeviceDiscoveryWorker::~QWinRTBluetoothDeviceDiscoveryWorker()
{
    if (m_leDeviceWatcher && m_leDeviceAddedToken.value) {
        HRESULT hr;
        hr = m_leDeviceWatcher->remove_Added(m_leDeviceAddedToken);
        Q_ASSERT_SUCCEEDED(hr);
    }
}

void QWinRTBluetoothDeviceDiscoveryWorker::start()
{
    QEventDispatcherWinRT::runOnXamlThread([this]() {
        if (requestedModes & QBluetoothDeviceDiscoveryAgent::ClassicMethod)
            startDeviceDiscovery(QBluetoothDeviceDiscoveryAgent::ClassicMethod);

        if (requestedModes & QBluetoothDeviceDiscoveryAgent::LowEnergyMethod)
            startDeviceDiscovery(QBluetoothDeviceDiscoveryAgent::LowEnergyMethod);
        return S_OK;
    });

    qCDebug(QT_BT_WINRT) << "Worker started";
}

void QWinRTBluetoothDeviceDiscoveryWorker::startDeviceDiscovery(QBluetoothDeviceDiscoveryAgent::DiscoveryMethod mode)
{
    HString deviceSelector;
    ComPtr<IDeviceInformationStatics> deviceInformationStatics;
    HRESULT hr = GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_Devices_Enumeration_DeviceInformation).Get(), &deviceInformationStatics);
    WARN_AND_RETURN_IF_FAILED("Could not obtain device information statics", return);
    if (mode == QBluetoothDeviceDiscoveryAgent::LowEnergyMethod) {
        ComPtr<IBluetoothLEDeviceStatics> bluetoothLeDeviceStatics;
        hr = GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_Devices_Bluetooth_BluetoothLEDevice).Get(), &bluetoothLeDeviceStatics);
        WARN_AND_RETURN_IF_FAILED("Could not obtain bluetooth LE device statics", return);
        bluetoothLeDeviceStatics->GetDeviceSelector(deviceSelector.GetAddressOf());
    } else {
        ComPtr<IBluetoothDeviceStatics> bluetoothDeviceStatics;
        hr = GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_Devices_Bluetooth_BluetoothDevice).Get(), &bluetoothDeviceStatics);
        WARN_AND_RETURN_IF_FAILED("Could not obtain bluetooth device statics", return);
        bluetoothDeviceStatics->GetDeviceSelector(deviceSelector.GetAddressOf());
    }
    ComPtr<IAsyncOperation<DeviceInformationCollection *>> op;
    hr = deviceInformationStatics->FindAllAsyncAqsFilter(deviceSelector.Get(), &op);
    WARN_AND_RETURN_IF_FAILED("Could not start bluetooth device discovery operation", return);
    hr = op->put_Completed(
        Callback<IAsyncOperationCompletedHandler<DeviceInformationCollection *>>([this, mode](IAsyncOperation<DeviceInformationCollection *> *op, AsyncStatus) {
        onDeviceDiscoveryFinished(op, mode);
        return S_OK;
    }).Get());
    WARN_AND_RETURN_IF_FAILED("Could not add callback to bluetooth device discovery operation", return);
}

void QWinRTBluetoothDeviceDiscoveryWorker::onDeviceDiscoveryFinished(IAsyncOperation<DeviceInformationCollection *> *op, QBluetoothDeviceDiscoveryAgent::DiscoveryMethod mode)
{
    qCDebug(QT_BT_WINRT) << (mode == QBluetoothDeviceDiscoveryAgent::ClassicMethod ? "BT" : "BTLE")
        << " scan completed";
    ComPtr<IVectorView<DeviceInformation *>> devices;
    HRESULT hr;
    hr = op->GetResults(&devices);
    Q_ASSERT_SUCCEEDED(hr);
    gatherMultipleDeviceInformation(devices.Get(), mode);
}

void QWinRTBluetoothDeviceDiscoveryWorker::gatherDeviceInformation(IDeviceInformation *deviceInfo, QBluetoothDeviceDiscoveryAgent::DiscoveryMethod mode)
{
    HString deviceId;
    HRESULT hr;
    hr = deviceInfo->get_Id(deviceId.GetAddressOf());
    Q_ASSERT_SUCCEEDED(hr);
    if (mode == QBluetoothDeviceDiscoveryAgent::LowEnergyMethod)
        bluetoothInfoFromLeDeviceIdAsync(deviceId.Get());
    else
        bluetoothInfoFromDeviceIdAsync(deviceId.Get());
}

void QWinRTBluetoothDeviceDiscoveryWorker::gatherMultipleDeviceInformation(IVectorView<DeviceInformation *> *devices, QBluetoothDeviceDiscoveryAgent::DiscoveryMethod mode)
{
    quint32 deviceCount;
    HRESULT hr = devices->get_Size(&deviceCount);
    Q_ASSERT_SUCCEEDED(hr);
    m_pendingDevices += deviceCount;
    for (quint32 i = 0; i < deviceCount; ++i) {
        ComPtr<IDeviceInformation> device;
        hr = devices->GetAt(i, &device);
        Q_ASSERT_SUCCEEDED(hr);
        gatherDeviceInformation(device.Get(), mode);
    }
}

void QWinRTBluetoothDeviceDiscoveryWorker::setupLEDeviceWatcher()
{
    HString deviceSelector;
    ComPtr<IDeviceInformationStatics> deviceInformationStatics;
    HRESULT hr = GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_Devices_Enumeration_DeviceInformation).Get(), &deviceInformationStatics);
    WARN_AND_RETURN_IF_FAILED("Could not obtain device information statics", return);
    ComPtr<IBluetoothLEDeviceStatics> bluetoothLeDeviceStatics;
    hr = GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_Devices_Bluetooth_BluetoothLEDevice).Get(), &bluetoothLeDeviceStatics);
    WARN_AND_RETURN_IF_FAILED("Could not obtain bluetooth LE device statics", return);
    hr = bluetoothLeDeviceStatics->GetDeviceSelector(deviceSelector.GetAddressOf());
    WARN_AND_RETURN_IF_FAILED("Could not obtain device selector string", return);
    hr = deviceInformationStatics->CreateWatcherAqsFilter(deviceSelector.Get(), &m_leDeviceWatcher);
    WARN_AND_RETURN_IF_FAILED("Could not create le device watcher", return);
    auto deviceAddedCallback =
        Callback<ITypedEventHandler<DeviceWatcher *, DeviceInformation *>>([this](IDeviceWatcher *, IDeviceInformation *deviceInfo)
    {
        HString deviceId;
        HRESULT hr;
        hr = deviceInfo->get_Id(deviceId.GetAddressOf());
        Q_ASSERT_SUCCEEDED(hr);
        bluetoothInfoFromLeDeviceIdAsync(deviceId.Get());
        return S_OK;
    });
    hr = m_leDeviceWatcher->add_Added(deviceAddedCallback.Get(), &m_leDeviceAddedToken);
    WARN_AND_RETURN_IF_FAILED("Could not add \"device added\" callback", return);
    hr = m_leDeviceWatcher->Start();
    WARN_AND_RETURN_IF_FAILED("Could not start device watcher", return);
}

void QWinRTBluetoothDeviceDiscoveryWorker::handleLeTimeout()
{
    // pendingDevices might be <0 if devices were added after the intitial scan was completed
    if (m_pendingDevices <= 0)
        emit scanFinished();
    else
        emit scanCanceled();
    deleteLater();
}

// "deviceFound" will be emitted at the end of the deviceFromIdOperation callback
void QWinRTBluetoothDeviceDiscoveryWorker::bluetoothInfoFromDeviceIdAsync(HSTRING deviceId)
{
    ComPtr<IBluetoothDeviceStatics> deviceStatics;
    HRESULT hr = GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_Devices_Bluetooth_BluetoothDevice).Get(), &deviceStatics);
    Q_ASSERT_SUCCEEDED(hr);
    ComPtr<IAsyncOperation<BluetoothDevice *>> deviceFromIdOperation;
    // on Windows 10 FromIdAsync might ask for device permission. We cannot wait here but have to handle that asynchronously
    hr = deviceStatics->FromIdAsync(deviceId, &deviceFromIdOperation);
    if (FAILED(hr)) {
        decreaseAndCheckPendingDevices();
        qCWarning(QT_BT_WINRT) << "Could not obtain bluetooth device from id";
        return;
    }
    QEventDispatcherWinRT::runOnXamlThread([deviceFromIdOperation, this]() {
        HRESULT hr;
        hr = deviceFromIdOperation->put_Completed(Callback<IAsyncOperationCompletedHandler<BluetoothDevice *>>
                                                  (this, &QWinRTBluetoothDeviceDiscoveryWorker::onClassicBluetoothDeviceFoundAsync).Get());
        if (FAILED(hr)) {
            decreaseAndCheckPendingDevices();
            qCWarning(QT_BT_WINRT) << "Could not register device found callback";
            return S_OK;
        }
        return S_OK;
    });
    Q_ASSERT_SUCCEEDED(hr);
}

// "deviceFound" will be emitted at the end of the deviceFromIdOperation callback
void QWinRTBluetoothDeviceDiscoveryWorker::bluetoothInfoFromLeDeviceIdAsync(HSTRING deviceId)
{
    ComPtr<IBluetoothLEDeviceStatics> deviceStatics;
    HRESULT hr = GetActivationFactory(HString::MakeReference(RuntimeClass_Windows_Devices_Bluetooth_BluetoothLEDevice).Get(), &deviceStatics);
    Q_ASSERT_SUCCEEDED(hr);
    ComPtr<IAsyncOperation<BluetoothLEDevice *>> deviceFromIdOperation;
    // on Windows 10 FromIdAsync might ask for device permission. We cannot wait here but have to handle that asynchronously
    hr = deviceStatics->FromIdAsync(deviceId, &deviceFromIdOperation);
    if (FAILED(hr)) {
        decreaseAndCheckPendingDevices();
        qCWarning(QT_BT_WINRT) << "Could not obtain bluetooth device from id";
        return;
    }
    QEventDispatcherWinRT::runOnXamlThread([deviceFromIdOperation, this]() {
        HRESULT hr;
        hr = deviceFromIdOperation->put_Completed(Callback<IAsyncOperationCompletedHandler<BluetoothLEDevice *>>
                                                  (this, &QWinRTBluetoothDeviceDiscoveryWorker::onBluetoothLEDeviceFoundAsync).Get());
        if (FAILED(hr)) {
            decreaseAndCheckPendingDevices();
            qCWarning(QT_BT_WINRT) << "Could not register device found callback";
            return S_OK;
        }
        return S_OK;
    });
}

HRESULT QWinRTBluetoothDeviceDiscoveryWorker::onClassicBluetoothDeviceFoundAsync(IAsyncOperation<BluetoothDevice *> *op, AsyncStatus status)
{
    if (status != AsyncStatus::Completed) {
        decreaseAndCheckPendingDevices();
        return S_OK;
    }

    ComPtr<IBluetoothDevice> device;
    HRESULT hr = op->GetResults(&device);
    Q_ASSERT_SUCCEEDED(hr);

    if (!device) {
        decreaseAndCheckPendingDevices();
        return S_OK;
    }
    UINT64 address;
    HString name;
    ComPtr<IBluetoothClassOfDevice> classOfDevice;
    UINT32 classOfDeviceInt;
    hr = device->get_BluetoothAddress(&address);
    Q_ASSERT_SUCCEEDED(hr);
    hr = device->get_Name(name.GetAddressOf());
    Q_ASSERT_SUCCEEDED(hr);
    const QString btName = QString::fromWCharArray(WindowsGetStringRawBuffer(name.Get(), nullptr));
    hr = device->get_ClassOfDevice(&classOfDevice);
    Q_ASSERT_SUCCEEDED(hr);
    hr = classOfDevice->get_RawValue(&classOfDeviceInt);
    Q_ASSERT_SUCCEEDED(hr);
    IVectorView <Rfcomm::RfcommDeviceService *> *deviceServices;
    hr = device->get_RfcommServices(&deviceServices);
    Q_ASSERT_SUCCEEDED(hr);
    uint serviceCount;
    hr = deviceServices->get_Size(&serviceCount);
    Q_ASSERT_SUCCEEDED(hr);
    QList<QBluetoothUuid> uuids;
    for (uint i = 0; i < serviceCount; ++i) {
        ComPtr<Rfcomm::IRfcommDeviceService> service;
        hr = deviceServices->GetAt(i, &service);
        Q_ASSERT_SUCCEEDED(hr);
        ComPtr<Rfcomm::IRfcommServiceId> id;
        hr = service->get_ServiceId(&id);
        Q_ASSERT_SUCCEEDED(hr);
        GUID uuid;
        hr = id->get_Uuid(&uuid);
        Q_ASSERT_SUCCEEDED(hr);
        uuids.append(QBluetoothUuid(uuid));
    }

    qCDebug(QT_BT_WINRT) << "Discovered BT device: " << QString::number(address) << btName
        << "Num UUIDs" << uuids.count();

    QBluetoothDeviceInfo info(QBluetoothAddress(address), btName, classOfDeviceInt);
    info.setCoreConfigurations(QBluetoothDeviceInfo::BaseRateCoreConfiguration);
    info.setServiceUuids(uuids, QBluetoothDeviceInfo::DataIncomplete);
    info.setCached(true);

    QMetaObject::invokeMethod(this, "deviceFound", Qt::AutoConnection,
                              Q_ARG(QBluetoothDeviceInfo, info));
    decreaseAndCheckPendingDevices();
    return S_OK;
}

HRESULT QWinRTBluetoothDeviceDiscoveryWorker::onBluetoothLEDeviceFoundAsync(IAsyncOperation<BluetoothLEDevice *> *op, AsyncStatus status)
{
    if (status != AsyncStatus::Completed) {
        decreaseAndCheckPendingDevices();
        return S_OK;
    }

    ComPtr<IBluetoothLEDevice> device;
    HRESULT hr = op->GetResults(&device);
    Q_ASSERT_SUCCEEDED(hr);

    if (!device) {
        decreaseAndCheckPendingDevices();
        return S_OK;
    }
    UINT64 address;
    HString name;
    hr = device->get_BluetoothAddress(&address);
    Q_ASSERT_SUCCEEDED(hr);
    hr = device->get_Name(name.GetAddressOf());
    Q_ASSERT_SUCCEEDED(hr);
    const QString btName = QString::fromWCharArray(WindowsGetStringRawBuffer(name.Get(), nullptr));
    IVectorView <GenericAttributeProfile::GattDeviceService *> *deviceServices;
    hr = device->get_GattServices(&deviceServices);
    Q_ASSERT_SUCCEEDED(hr);
    uint serviceCount;
    hr = deviceServices->get_Size(&serviceCount);
    Q_ASSERT_SUCCEEDED(hr);
    QList<QBluetoothUuid> uuids;
    for (uint i = 0; i < serviceCount; ++i) {
        ComPtr<GenericAttributeProfile::IGattDeviceService> service;
        hr = deviceServices->GetAt(i, &service);
        Q_ASSERT_SUCCEEDED(hr);
        ComPtr<Rfcomm::IRfcommServiceId> id;
        GUID uuid;
        hr = service->get_Uuid(&uuid);
        Q_ASSERT_SUCCEEDED(hr);
        uuids.append(QBluetoothUuid(uuid));
    }

    qCDebug(QT_BT_WINRT) << "Discovered BTLE device: " << QString::number(address) << btName
        << "Num UUIDs" << uuids.count();

    QBluetoothDeviceInfo info(QBluetoothAddress(address), btName, 0);
    info.setCoreConfigurations(QBluetoothDeviceInfo::LowEnergyCoreConfiguration);
    info.setServiceUuids(uuids, QBluetoothDeviceInfo::DataIncomplete);
    info.setCached(true);

    QMetaObject::invokeMethod(this, "deviceFound", Qt::AutoConnection,
                              Q_ARG(QBluetoothDeviceInfo, info));
    decreaseAndCheckPendingDevices();
    return S_OK;
}

void QWinRTBluetoothDeviceDiscoveryWorker::decreaseAndCheckPendingDevices()
{
    --m_pendingDevices;
    if (m_pendingDevices == 0)
        setupLEDeviceWatcher();
}

QBluetoothDeviceDiscoveryAgentPrivate::QBluetoothDeviceDiscoveryAgentPrivate(
                const QBluetoothAddress &deviceAdapter,
                QBluetoothDeviceDiscoveryAgent *parent)

    :   inquiryType(QBluetoothDeviceDiscoveryAgent::GeneralUnlimitedInquiry),
        lastError(QBluetoothDeviceDiscoveryAgent::NoError),
        lowEnergySearchTimeout(25000),
        q_ptr(parent),
        leScanTimer(0)
{
    Q_UNUSED(deviceAdapter);
}

QBluetoothDeviceDiscoveryAgentPrivate::~QBluetoothDeviceDiscoveryAgentPrivate()
{
    disconnectAndClearWorker();
}

bool QBluetoothDeviceDiscoveryAgentPrivate::isActive() const
{
    return worker;
}

QBluetoothDeviceDiscoveryAgent::DiscoveryMethods QBluetoothDeviceDiscoveryAgent::supportedDiscoveryMethods()
{
    return (ClassicMethod | LowEnergyMethod);
}

void QBluetoothDeviceDiscoveryAgentPrivate::start(QBluetoothDeviceDiscoveryAgent::DiscoveryMethods methods)
{
    if (worker)
        return;

    worker = new QWinRTBluetoothDeviceDiscoveryWorker(methods);
    discoveredDevices.clear();
    connect(worker, &QWinRTBluetoothDeviceDiscoveryWorker::deviceFound,
            this, &QBluetoothDeviceDiscoveryAgentPrivate::registerDevice);
    connect(worker, &QWinRTBluetoothDeviceDiscoveryWorker::scanFinished,
            this, &QBluetoothDeviceDiscoveryAgentPrivate::onScanFinished);
    connect(worker, &QWinRTBluetoothDeviceDiscoveryWorker::scanCanceled,
            this, &QBluetoothDeviceDiscoveryAgentPrivate::onScanCanceled);
    worker->start();

    if (lowEnergySearchTimeout > 0 && methods & QBluetoothDeviceDiscoveryAgent::LowEnergyMethod) { // otherwise no timeout and stop() required
        if (!leScanTimer) {
            leScanTimer = new QTimer(this);
            leScanTimer->setSingleShot(true);
        }
        connect(leScanTimer, &QTimer::timeout,
            worker, &QWinRTBluetoothDeviceDiscoveryWorker::handleLeTimeout);
        leScanTimer->setInterval(lowEnergySearchTimeout);
        leScanTimer->start();
    }
}

void QBluetoothDeviceDiscoveryAgentPrivate::stop()
{
    Q_Q(QBluetoothDeviceDiscoveryAgent);
    if (worker) {
        disconnectAndClearWorker();
        emit q->canceled();
    }
    if (leScanTimer) {
        leScanTimer->stop();
        worker->deleteLater();
    }
}

void QBluetoothDeviceDiscoveryAgentPrivate::registerDevice(const QBluetoothDeviceInfo &info)
{
    Q_Q(QBluetoothDeviceDiscoveryAgent);

    for (QList<QBluetoothDeviceInfo>::iterator iter = discoveredDevices.begin();
        iter != discoveredDevices.end(); ++iter) {
        if (iter->address() == info.address()) {
            qCDebug(QT_BT_WINRT) << "Updating device" << iter->name() << iter->address();
            // merge service uuids
            QList<QBluetoothUuid> uuids = iter->serviceUuids();
            uuids.append(info.serviceUuids());
            const QSet<QBluetoothUuid> uuidSet = uuids.toSet();
            if (iter->serviceUuids().count() != uuidSet.count())
                iter->setServiceUuids(uuidSet.toList(), QBluetoothDeviceInfo::DataIncomplete);
            if (iter->coreConfigurations() != info.coreConfigurations())
                iter->setCoreConfigurations(QBluetoothDeviceInfo::BaseRateAndLowEnergyCoreConfiguration);
            return;
        }
    }

    discoveredDevices << info;
    emit q->deviceDiscovered(info);
}

void QBluetoothDeviceDiscoveryAgentPrivate::onScanFinished()
{
    Q_Q(QBluetoothDeviceDiscoveryAgent);
    disconnectAndClearWorker();
    emit q->finished();
}

void QBluetoothDeviceDiscoveryAgentPrivate::onScanCanceled()
{
    Q_Q(QBluetoothDeviceDiscoveryAgent);
    disconnectAndClearWorker();
    emit q->canceled();
}

void QBluetoothDeviceDiscoveryAgentPrivate::disconnectAndClearWorker()
{
    Q_Q(QBluetoothDeviceDiscoveryAgent);
    if (!worker)
        return;

    disconnect(worker, &QWinRTBluetoothDeviceDiscoveryWorker::scanCanceled,
        this, &QBluetoothDeviceDiscoveryAgentPrivate::onScanCanceled);
    disconnect(worker, &QWinRTBluetoothDeviceDiscoveryWorker::scanFinished,
        this, &QBluetoothDeviceDiscoveryAgentPrivate::onScanFinished);
    disconnect(worker, &QWinRTBluetoothDeviceDiscoveryWorker::deviceFound,
        q, &QBluetoothDeviceDiscoveryAgent::deviceDiscovered);
    if (leScanTimer) {
        disconnect(leScanTimer, &QTimer::timeout,
            worker, &QWinRTBluetoothDeviceDiscoveryWorker::handleLeTimeout);
    }
    worker.clear();
}

QT_END_NAMESPACE

#include <qbluetoothdevicediscoveryagent_winrt.moc>