/****************************************************************************
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** Copyright (C) 2016 The Qt Company Ltd.
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** This file is part of the QtBluetooth module of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
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****************************************************************************/

#ifndef QBLUETOOTHSERVICEDISCOVERYAGENT_P_H
#define QBLUETOOTHSERVICEDISCOVERYAGENT_P_H

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

#include "qbluetoothaddress.h"
#include "qbluetoothdeviceinfo.h"
#include "qbluetoothserviceinfo.h"
#include "qbluetoothservicediscoveryagent.h"

#include <QStack>
#include <QStringList>

#if QT_CONFIG(bluez)
class OrgBluezManagerInterface;
class OrgBluezAdapterInterface;
class OrgBluezDeviceInterface;
class OrgFreedesktopDBusObjectManagerInterface;
#include <QtCore/qprocess.h>

QT_BEGIN_NAMESPACE
class QDBusPendingCallWatcher;
class QXmlStreamReader;
QT_END_NAMESPACE
#endif

#ifdef QT_WIN_BLUETOOTH
#include <QtCore/QVariant>

QT_BEGIN_NAMESPACE
class QThread;

class ThreadWorkerFind : public QObject
{
    Q_OBJECT
signals:
    void findFinished(QVariant result);
};
QT_END_NAMESPACE

#elif defined(QT_WINRT_BLUETOOTH)
#include <QtCore/QPointer>
#endif

#ifdef QT_OSX_BLUETOOTH
#include "darwin/btdelegates_p.h"
#include "darwin/btraii_p.h"
#endif

QT_BEGIN_NAMESPACE

class QBluetoothDeviceDiscoveryAgent;
#ifdef QT_ANDROID_BLUETOOTH
class ServiceDiscoveryBroadcastReceiver;
class LocalDeviceBroadcastReceiver;
#include <QtAndroidExtras/QAndroidJniObject>
#include <QtBluetooth/QBluetoothLocalDevice>
#endif

#ifdef QT_WINRT_BLUETOOTH
class QWinRTBluetoothServiceDiscoveryWorker;
#endif

class QBluetoothServiceDiscoveryAgentPrivate
#if defined QT_WINRT_BLUETOOTH || defined QT_WIN_BLUETOOTH
        : public QObject
{
    Q_OBJECT
#elif defined(QT_OSX_BLUETOOTH)
        : public QObject, public DarwinBluetooth::SDPInquiryDelegate
{
#else
{
#endif
    Q_DECLARE_PUBLIC(QBluetoothServiceDiscoveryAgent)

public:
    enum DiscoveryState {
        Inactive,
        DeviceDiscovery,
        ServiceDiscovery,
    };

    QBluetoothServiceDiscoveryAgentPrivate(QBluetoothServiceDiscoveryAgent *qp,
                                           const QBluetoothAddress &deviceAdapter);
    ~QBluetoothServiceDiscoveryAgentPrivate();

    void startDeviceDiscovery();
    void stopDeviceDiscovery();
    void startServiceDiscovery();
    void stopServiceDiscovery();

    void setDiscoveryState(DiscoveryState s) { state = s; }
    inline DiscoveryState discoveryState() { return state; }

    void setDiscoveryMode(QBluetoothServiceDiscoveryAgent::DiscoveryMode m) { mode = m; }
    QBluetoothServiceDiscoveryAgent::DiscoveryMode DiscoveryMode() { return mode; }

    void _q_deviceDiscoveryFinished();
    void _q_deviceDiscovered(const QBluetoothDeviceInfo &info);
    void _q_serviceDiscoveryFinished();
    void _q_deviceDiscoveryError(QBluetoothDeviceDiscoveryAgent::Error);
#if QT_CONFIG(bluez)
    void _q_discoveredServices(QDBusPendingCallWatcher *watcher);
    void _q_createdDevice(QDBusPendingCallWatcher *watcher);
    void _q_foundDevice(QDBusPendingCallWatcher *watcher);
    //Slots below are used for discovering Bluetooth Low Energy devices. It will be used with Bluez 5.x version.
    /*
    void _g_discoveredGattService();
    void _q_discoverGattCharacteristics(QDBusPendingCallWatcher *watcher);
    void _q_discoveredGattCharacteristic(QDBusPendingCallWatcher *watcher);
    */
    void _q_sdpScannerDone(int exitCode, QProcess::ExitStatus status);
    void _q_finishSdpScan(QBluetoothServiceDiscoveryAgent::Error errorCode,
                          const QString &errorDescription,
                          const QStringList &xmlRecords);
#endif
#ifdef QT_ANDROID_BLUETOOTH
    void _q_processFetchedUuids(const QBluetoothAddress &address, const QList<QBluetoothUuid> &uuids);

    void populateDiscoveredServices(const QBluetoothDeviceInfo &remoteDevice,
                                    const QList<QBluetoothUuid> &uuids);
    void _q_fetchUuidsTimeout();
    void _q_hostModeStateChanged(QBluetoothLocalDevice::HostMode state);
#endif
#ifdef QT_WIN_BLUETOOTH
    void _q_nextSdpScan(const QVariant &input);
    bool serviceMatches(const QBluetoothServiceInfo &info);
#endif

private:
    void start(const QBluetoothAddress &address);
    void stop();
    bool isDuplicatedService(const QBluetoothServiceInfo &serviceInfo) const;

#if QT_CONFIG(bluez)
    void startBluez5(const QBluetoothAddress &address);
    void runExternalSdpScan(const QBluetoothAddress &remoteAddress,
                    const QBluetoothAddress &localAddress);
    void sdpScannerDone(int exitCode, QProcess::ExitStatus exitStatus);
    QVariant readAttributeValue(QXmlStreamReader &xml);
    QBluetoothServiceInfo parseServiceXml(const QString& xml);
    void performMinimalServiceDiscovery(const QBluetoothAddress &deviceAddress);
    void discoverServices(const QString &deviceObjectPath);
#endif

public:
    QBluetoothServiceDiscoveryAgent::Error error;
    QString errorString;
    QBluetoothAddress deviceAddress;
    QList<QBluetoothServiceInfo> discoveredServices;
    QList<QBluetoothDeviceInfo> discoveredDevices;
    QBluetoothAddress m_deviceAdapterAddress;

private:
    DiscoveryState state;
    QList<QBluetoothUuid> uuidFilter;

    QBluetoothDeviceDiscoveryAgent *deviceDiscoveryAgent = nullptr;

    QBluetoothServiceDiscoveryAgent::DiscoveryMode mode;

    bool singleDevice;
#if QT_CONFIG(bluez)
    QString foundHostAdapterPath;
    OrgBluezManagerInterface *manager = nullptr;
    OrgFreedesktopDBusObjectManagerInterface *managerBluez5 = nullptr;
    OrgBluezAdapterInterface *adapter = nullptr;
    OrgBluezDeviceInterface *device = nullptr;
    QProcess *sdpScannerProcess = nullptr;
#endif

#ifdef QT_ANDROID_BLUETOOTH
    ServiceDiscoveryBroadcastReceiver *receiver = nullptr;
    LocalDeviceBroadcastReceiver *localDeviceReceiver = nullptr;

    QAndroidJniObject btAdapter;
    QMap<QBluetoothAddress,QPair<QBluetoothDeviceInfo,QList<QBluetoothUuid> > > sdpCache;
#endif

#ifdef QT_WIN_BLUETOOTH
private:
    bool pendingStop;
    bool pendingFinish;

    QThread *threadFind = nullptr;
    ThreadWorkerFind *threadWorkerFind = nullptr;
#endif

#ifdef QT_WINRT_BLUETOOTH
private slots:
    void processFoundService(quint64 deviceAddress, const QBluetoothServiceInfo &info);
    void onScanFinished(quint64 deviceAddress);
    void onScanCanceled();
    void onError();

private:
    QPointer<QWinRTBluetoothServiceDiscoveryWorker> worker;
#endif

#ifdef QT_OSX_BLUETOOTH
    // SDPInquiryDelegate:
    void SDPInquiryFinished(void *device) override;
    void SDPInquiryError(void *device, IOReturn errorCode) override;

    void performMinimalServiceDiscovery(const QBluetoothAddress &deviceAddress);
    //void serviceDiscoveryFinished();

    bool serviceHasMatchingUuid(const QBluetoothServiceInfo &serviceInfo) const;

    DarwinBluetooth::ScopedPointer serviceInquiry;
#endif // QT_OSX_BLUETOOTH

protected:
    QBluetoothServiceDiscoveryAgent *q_ptr;
};

QT_END_NAMESPACE

#endif