#include "broker_connection.h"

#include <QtCore/QString>
#include <QtNetwork/QTcpServer>
#include <QtTest/QtTest>
#include <QtTest/QSignalSpy>
#include <QtMqtt/QMqttClient>

#include <limits>

class Tst_QMqttClient : public QObject
{
    Q_OBJECT

public:
    Tst_QMqttClient();

private Q_SLOTS:
    void initTestCase();
    void cleanupTestCase();
    void getSetCheck_data();
    void getSetCheck();
    void sendReceive_data();
    void sendReceive();
    void retainMessage_data();
    void retainMessage();
    void willMessage_data();
    void willMessage();
    void compliantTopic_data();
    void compliantTopic();
    void subscribeLongTopic_data();
    void subscribeLongTopic();
    void dataIncludingZero_data();
    void dataIncludingZero();
    void publishLongTopic_data();
    void publishLongTopic();
    void reconnect_QTBUG65726_data();
    void reconnect_QTBUG65726();
    void openIODevice_QTBUG66955_data();
    void openIODevice_QTBUG66955();
    void staticProperties_QTBUG_67176_data();
    void staticProperties_QTBUG_67176();
    void authentication();
    void messageStatus_data();
    void messageStatus();
    void messageStatusReceive_data();
    void messageStatusReceive();
    void subscriptionIdsOverlap();
    void keepAlive_data();
    void keepAlive();
private:
    QProcess m_brokerProcess;
    QString m_testBroker;
    quint16 m_port{1883};
};

Tst_QMqttClient::Tst_QMqttClient()
{
}

void Tst_QMqttClient::initTestCase()
{
    m_testBroker = invokeOrInitializeBroker(&m_brokerProcess);
    if (m_testBroker.isEmpty())
        qFatal("No MQTT broker present to test against.");
}

void Tst_QMqttClient::cleanupTestCase()
{
}

DefaultVersionTestData(Tst_QMqttClient::getSetCheck_data)

void Tst_QMqttClient::getSetCheck()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);
    VersionClient(mqttVersion, client);

    QVERIFY(client.clientId().size() > 0);
    const QString clientId = QLatin1String("testclient123");
    client.setClientId(clientId);
    QCOMPARE(client.clientId(), clientId);

    QCOMPARE(client.hostname(), QString());
    const QString hostname = QLatin1String("qt.io");
    client.setHostname(hostname);
    QCOMPARE(client.hostname(), hostname);

    QCOMPARE(client.port(), quint16(0));
    client.setPort(1883);
    QCOMPARE(client.port(), quint16(1883));

    QCOMPARE(client.keepAlive(), quint16(60));
    client.setKeepAlive(10);
    QCOMPARE(client.keepAlive(), quint16(10));

    QMqttClient client2;
    QCOMPARE(client2.protocolVersion(), QMqttClient::MQTT_3_1_1);
    client2.setProtocolVersion(QMqttClient::ProtocolVersion(0));
    QCOMPARE(client2.protocolVersion(), QMqttClient::MQTT_3_1_1);
    client2.setProtocolVersion(QMqttClient::ProtocolVersion(6));
    QCOMPARE(client2.protocolVersion(), QMqttClient::MQTT_3_1_1);
    client2.setProtocolVersion(QMqttClient::MQTT_3_1);
    QCOMPARE(client2.protocolVersion(), QMqttClient::MQTT_3_1);
    client2.setProtocolVersion(QMqttClient::MQTT_5_0);
    QCOMPARE(client2.protocolVersion(), QMqttClient::MQTT_5_0);

#ifdef QT_BUILD_INTERNAL
    if (qEnvironmentVariableIsSet("QT_MQTT_TEST_USERNAME"))
        QEXPECT_FAIL("", "Default username has been overwritten.", Continue);
#endif
    QCOMPARE(client.username(), QString());
#ifdef QT_BUILD_INTERNAL
    if (qEnvironmentVariableIsSet("QT_MQTT_TEST_PASSWORD"))
        QEXPECT_FAIL("", "Default username has been overwritten.", Continue);
#endif
    QCOMPARE(client.password(), QString());
    QCOMPARE(client.cleanSession(), true);
    QCOMPARE(client.willTopic(), QString());
    QCOMPARE(client.willMessage(), QByteArray());
    QCOMPARE(client.willQoS(), quint8(0));
    QCOMPARE(client.willRetain(), false);
    QCOMPARE(client.autoKeepAlive(), true);
    client.setAutoKeepAlive(false);
    QCOMPARE(client.autoKeepAlive(), false);
}

void Tst_QMqttClient::sendReceive_data()
{
    QTest::addColumn<QMqttClient::ProtocolVersion>("mqttVersion");
    QTest::addColumn<QByteArray>("data");

    QList<QMqttClient::ProtocolVersion> versions{QMqttClient::MQTT_3_1_1, QMqttClient::MQTT_5_0};

    for (int i = 0; i < 2; ++i) {
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":empty")) << versions[i] << QByteArray();
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":simple")) << versions[i] << QByteArray("This is a test message");
        QByteArray d;
        d.fill('A', 500);
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":big")) << versions[i] << d;
        d.fill('B', (128 * 128 * 128) + 4);
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":huge")) << versions[i] << d;
    }
}

void Tst_QMqttClient::sendReceive()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);
    QFETCH(QByteArray, data);
    const QString testTopic = QLatin1String("Qt/QMqttClient/Topic");

    VersionClient(mqttVersion, publisher);
    publisher.setClientId(QLatin1String("publisher"));
    publisher.setHostname(m_testBroker);
    publisher.setPort(m_port);

    publisher.connectToHost();
    QTRY_COMPARE(publisher.state(), QMqttClient::Connected);

    VersionClient(mqttVersion, subscriber);
    subscriber.setClientId(QLatin1String("subscriber"));
    subscriber.setHostname(m_testBroker);
    subscriber.setPort(m_port);

    subscriber.connectToHost();
    QTRY_COMPARE(subscriber.state(), QMqttClient::Connected);

    bool received = false;
    bool verified = false;
    auto sub = subscriber.subscribe(testTopic, 1);
    QVERIFY(sub);
    connect(sub, &QMqttSubscription::messageReceived, [&](QMqttMessage msg) {
        verified = msg.payload() == data;
        received = true;
    });

    QTRY_COMPARE(sub->state(), QMqttSubscription::Subscribed);

    if (subscriber.protocolVersion() == QMqttClient::MQTT_5_0 &&
            (quint32)data.size() > subscriber.serverConnectionProperties().maximumPacketSize())
        QSKIP("The MQTT 5 test broker does not support huge packages.", SkipOnce);
    publisher.publish(testTopic, data, 1);

    QTRY_VERIFY2(received, "Subscriber did not receive message");
    QVERIFY2(verified, "Subscriber received different message");
}

DefaultVersionTestData(Tst_QMqttClient::retainMessage_data)

void Tst_QMqttClient::retainMessage()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    const QString testTopic = QLatin1String("Qt/QMqttClient/Topic2");
    const QByteArray testMessage("retainedMessage");

    VersionClient(mqttVersion, publisher);
    publisher.setClientId(QLatin1String("publisher"));
    publisher.setHostname(m_testBroker);
    publisher.setPort(m_port);

    publisher.connectToHost();
    QTRY_COMPARE(publisher.state(), QMqttClient::Connected);

    publisher.publish(testTopic, QByteArray(), 0, true);

    QTest::qWait(500);

    for (int i = 0; i < 2; i++) {
        int msgCount = 0;

        QSignalSpy publishSpy(&publisher, SIGNAL(messageSent(qint32)));
        publisher.publish(testTopic, testMessage, 1, i == 1 ? true : false);
        QTRY_COMPARE(publishSpy.count(), 1);

        VersionClient(mqttVersion, sub);
        sub.setClientId(QLatin1String("SubA"));
        sub.setHostname(m_testBroker);
        sub.setPort(m_port);
        connect(&sub, &QMqttClient::messageReceived, [&msgCount, testMessage](const QByteArray &msg) {
            if (msg == testMessage)
                msgCount++;
        });

        QSignalSpy messageSpy(&sub, SIGNAL(messageReceived(QByteArray,QMqttTopicName)));
        sub.connectToHost();
        QTRY_COMPARE(sub.state(), QMqttClient::Connected);

        auto subscription = sub.subscribe(testTopic);
        QTRY_COMPARE(subscription->state(), QMqttSubscription::Subscribed);

        QTRY_VERIFY(msgCount == i);
    }
    publisher.disconnect();
}

void Tst_QMqttClient::willMessage_data()
{
    QTest::addColumn<QMqttClient::ProtocolVersion>("mqttVersion");
    QTest::addColumn<QByteArray>("willMessage");

    QList<QMqttClient::ProtocolVersion> versions{QMqttClient::MQTT_3_1_1, QMqttClient::MQTT_5_0};

    for (int i = 0; i < 2; ++i) {
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":simple")) << versions[i] << QByteArray("The client connection is gone.");
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":empty")) << versions[i] << QByteArray();
    }
}

void Tst_QMqttClient::willMessage()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);
    QFETCH(QByteArray, willMessage);

    const QString willTopic = QLatin1String("Qt/QMqttClient/will/topic");

    VersionClient(mqttVersion, client1);
    client1.setHostname(m_testBroker);
    client1.setPort(m_port);
    client1.connectToHost();
    QTRY_COMPARE(client1.state(), QMqttClient::Connected);

    auto client1Sub = client1.subscribe(willTopic, 1);
    connect(client1Sub, &QMqttSubscription::messageReceived, [=](QMqttMessage message) {
        Q_UNUSED(message);

    });
    QTRY_COMPARE(client1Sub->state(), QMqttSubscription::Subscribed);

    QSignalSpy messageSpy(client1Sub, SIGNAL(messageReceived(QMqttMessage)));

    QTcpSocket sock;
    sock.connectToHost(m_testBroker, m_port);
    QVERIFY(sock.waitForConnected());

    for (int i = 1; i > 0; --i) {
        VersionClient(mqttVersion, willClient);
        if (i == 1)
            willClient.setTransport(&sock, QMqttClient::AbstractSocket);
        else {
            willClient.setHostname(m_testBroker);
            willClient.setPort(m_port);
        }
        willClient.setWillQoS(1);
        willClient.setWillTopic(willTopic);
        willClient.setWillMessage(willMessage);
        willClient.connectToHost();
        QTRY_COMPARE(willClient.state(), QMqttClient::Connected);

        willClient.publish(QLatin1String("noninteresting"), "just something");

        if (i == 1)
            sock.disconnectFromHost();
        else
            willClient.disconnectFromHost();
        QTest::qWait(500);
        QTRY_COMPARE(messageSpy.count(), i);
    }
}

void Tst_QMqttClient::compliantTopic_data()
{
    QTest::addColumn<QMqttClient::ProtocolVersion>("mqttVersion");
    QTest::addColumn<QString>("topic");

    QList<QMqttClient::ProtocolVersion> versions{QMqttClient::MQTT_3_1_1, QMqttClient::MQTT_5_0};

    for (int i = 0; i < 2; ++i) {
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":simple")) << versions[i] << QString::fromLatin1("Qt/QMqttClient/topic");
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":subPath")) << versions[i] << QString::fromLatin1("Qt/QMqttClient/topic/subtopic");

        if (versions[i] != QMqttClient::MQTT_5_0) {
            QString l;
            l.fill(QLatin1Char('T'), std::numeric_limits<std::uint16_t>::max());
            QTest::newRow(qPrintable(QString::number(versions[i]) + ":maxSize")) << versions[i] << l;
        }
    }
}

void Tst_QMqttClient::compliantTopic()
{
    QFETCH(QString, topic);
    QString truncTopic = topic;
    truncTopic.truncate(std::numeric_limits<std::uint16_t>::max());

    QMqttClient publisher;
    publisher.setClientId(QLatin1String("publisher"));
    publisher.setHostname(m_testBroker);
    publisher.setPort(m_port);

    publisher.connectToHost();
    QTRY_COMPARE(publisher.state(), QMqttClient::Connected);

    QMqttClient subscriber;
    subscriber.setClientId(QLatin1String("subscriber"));
    subscriber.setHostname(m_testBroker);
    subscriber.setPort(m_port);

    subscriber.connectToHost();
    QTRY_COMPARE(subscriber.state(), QMqttClient::Connected);

    bool received = false;
    bool verified = false;
    connect(&subscriber, &QMqttClient::messageReceived, [&](const QByteArray &, const QMqttTopicName &t) {
        received = true;
        verified = t == truncTopic;
    });

    auto client1Sub = subscriber.subscribe(truncTopic, 1);
    QTRY_COMPARE(client1Sub->state(), QMqttSubscription::Subscribed);

    publisher.publish(topic, QByteArray("Msgs"), 1);

    QTRY_VERIFY2(received, "Subscriber did not receive message");
    QVERIFY2(verified, "Subscriber received different message");
}

DefaultVersionTestData(Tst_QMqttClient::subscribeLongTopic_data)

void Tst_QMqttClient::subscribeLongTopic()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    VersionClient(mqttVersion, subscriber);
    subscriber.setClientId(QLatin1String("subscriber"));
    subscriber.setHostname(m_testBroker);
    subscriber.setPort(m_port);

    subscriber.connectToHost();
    QTRY_COMPARE(subscriber.state(), QMqttClient::Connected);

    QString topic;
    topic.fill(QLatin1Char('s'), 2 * std::numeric_limits<std::uint16_t>::max());
    auto sub = subscriber.subscribe(topic);
    QCOMPARE(sub, nullptr);
}

DefaultVersionTestData(Tst_QMqttClient::dataIncludingZero_data)

void Tst_QMqttClient::dataIncludingZero()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    QByteArray data;
    const int dataSize = 200;
    data.fill('A', dataSize);
    data[100] = '\0';

    VersionClient(mqttVersion, client);
    client.setHostname(m_testBroker);
    client.setPort(m_port);

    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Connected);

    bool received = false;
    bool verified = false;
    bool correctSize = false;
    const QString testTopic(QLatin1String("Qt/QMqttClient/some/topic"));
    auto sub = client.subscribe(testTopic, 1);
    QVERIFY(sub);
    connect(sub, &QMqttSubscription::messageReceived, [&](QMqttMessage msg) {
        verified = msg.payload() == data;
        correctSize = msg.payload().size() == dataSize;
        received = true;
    });

    QTRY_COMPARE(sub->state(), QMqttSubscription::Subscribed);

    client.publish(testTopic, data, 1);

    QTRY_VERIFY2(received, "Subscriber did not receive message");
    QVERIFY2(verified, "Subscriber received different message");
    QVERIFY2(correctSize, "Subscriber received message of different size");
}

DefaultVersionTestData(Tst_QMqttClient::publishLongTopic_data)

void Tst_QMqttClient::publishLongTopic()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    VersionClient(mqttVersion, publisher);
    publisher.setClientId(QLatin1String("publisher"));
    publisher.setHostname(m_testBroker);
    publisher.setPort(m_port);

    publisher.connectToHost();
    QTRY_COMPARE(publisher.state(), QMqttClient::Connected);

    QString topic;
    topic.fill(QLatin1Char('s'), 2 * std::numeric_limits<std::uint16_t>::max());
    auto pub = publisher.publish(topic);
    QCOMPARE(pub, -1);
}

class FakeServer : public QObject
{
    Q_OBJECT
public:
    FakeServer() {
        server = new QTcpServer(this);
        connect(server, &QTcpServer::newConnection, this, &FakeServer::createSocket);
        server->listen(QHostAddress::Any, 5726);
    }
public slots:
    void createSocket() {
        socket = server->nextPendingConnection();
        connect(socket, &QTcpSocket::readyRead, this, &FakeServer::connectionRequested);
    }

    void connectionRequested() {

        socket->readAll();
        QByteArray response;
        response += 0x20;
        response += quint8(2); 
        if (!connectionSuccess) {
            response += quint8(255); 
            response += quint8(13);
        } else {
            response += char(0); 
            response += char(0); 
            if (version == QMqttClient::MQTT_5_0) {
                response += char(0); 
                response[1] = response[1] + 1; 
            }
        }
        qDebug() << "Fake server response:" << connectionSuccess;
        socket->write(response);
    }
public:
    QTcpServer *server;
    QTcpSocket *socket;
    QMqttClient::ProtocolVersion version{QMqttClient::MQTT_3_1_1};
    bool connectionSuccess{false};
};

DefaultVersionTestData(Tst_QMqttClient::reconnect_QTBUG65726_data)

void Tst_QMqttClient::reconnect_QTBUG65726()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    FakeServer server;

    VersionClient(mqttVersion, client);
    client.setClientId(QLatin1String("bugclient"));
    client.setHostname(QLatin1String("localhost"));
    client.setPort(5726);

    server.version = client.protocolVersion();

    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Disconnected);
    QTRY_COMPARE(client.error(), QMqttClient::ProtocolViolation);

    server.connectionSuccess = true;

    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Connected);
    QTRY_COMPARE(client.error(), QMqttClient::NoError);
}

class IOTransport : public QIODevice
{
public:
    bool open(OpenMode mode) override {
        return QIODevice::open(mode);
    }
    qint64 readData(char *data, qint64 maxlen) override {
        Q_UNUSED(data);
        Q_UNUSED(maxlen);
        return 0;
    }
    qint64 writeData(const char *data, qint64 len) override {
        Q_UNUSED(data);
        Q_UNUSED(len);
        if (data[0] == 0x10)
            written = 1;
        else
            qDebug() << "Received unknown/invalid data";
        return len;
    }
    QAtomicInt written{0};
};

DefaultVersionTestData(Tst_QMqttClient::openIODevice_QTBUG66955_data)

void Tst_QMqttClient::openIODevice_QTBUG66955()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    IOTransport trans;
    trans.open(QIODevice::ReadWrite);

    VersionClient(mqttVersion, client);
    client.setTransport(&trans, QMqttClient::IODevice);
    client.connectToHost();

    QTRY_COMPARE(trans.written, 1);
}

DefaultVersionTestData(Tst_QMqttClient::staticProperties_QTBUG_67176_data)

void Tst_QMqttClient::staticProperties_QTBUG_67176()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    VersionClient(mqttVersion, client);
    client.setHostname(m_testBroker);
    client.setPort(m_port);

    const QString clientId = client.clientId();
    const quint16 keepAlive = client.keepAlive();
    const bool clean = client.cleanSession();

    client.connectToHost();
    QTRY_VERIFY2(client.state() == QMqttClient::Connected, "Could not connect to broker.");

    client.setClientId(QLatin1String("someclient"));
    QCOMPARE(client.clientId(), clientId);

    client.setHostname(QLatin1String("some.domain.foo"));
    QCOMPARE(client.hostname(), m_testBroker);

    client.setPort(1234);
    QCOMPARE(client.port(), m_port);

    client.setKeepAlive(keepAlive + 10);
    QCOMPARE(client.keepAlive(), keepAlive);

    client.setProtocolVersion(QMqttClient::MQTT_3_1);
    QCOMPARE(client.protocolVersion(), mqttVersion);

    client.setUsername(QLatin1String("someUser"));
    QCOMPARE(client.username(), QLatin1String());

    client.setPassword(QLatin1String("somePassword"));
    QCOMPARE(client.password(), QLatin1String());

    client.setCleanSession(!clean);
    QCOMPARE(client.cleanSession(), clean);
}

void Tst_QMqttClient::authentication()
{
    QMqttClient client;
    client.setProtocolVersion(QMqttClient::MQTT_5_0);
    client.setHostname(m_testBroker);
    client.setPort(m_port);

    QMqttConnectionProperties connectionProperties;
    connectionProperties.setAuthenticationMethod(QLatin1String("SCRAM-SHA-1"));
    client.setConnectionProperties(connectionProperties);

    connect(&client, &QMqttClient::authenticationRequested, [](const QMqttAuthenticationProperties &prop)
    {
        qDebug() << "Authentication requested:" << prop.authenticationMethod();
    });

    connect(&client, &QMqttClient::authenticationFinished, [](const QMqttAuthenticationProperties &prop)
    {
        qDebug() << "Authentication finished:" << prop.authenticationMethod();
    });

    QSKIP("No broker available with enhanced authentication.");
    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Connected);
}

Q_DECLARE_METATYPE(QMqtt::MessageStatus)

void Tst_QMqttClient::messageStatus_data()
{
    QTest::addColumn<int>("qos");
    QTest::addColumn<QList<QMqtt::MessageStatus>>("expectedStatus");

    QTest::newRow("QoS1") << 1 << (QList<QMqtt::MessageStatus>() << QMqtt::MessageStatus::Acknowledged);
    QTest::newRow("QoS2") << 2 << (QList<QMqtt::MessageStatus>() << QMqtt::MessageStatus::Received
                                   << QMqtt::MessageStatus::Completed);
}

void Tst_QMqttClient::messageStatus()
{
    QFETCH(int, qos);
    QFETCH(QList<QMqtt::MessageStatus>, expectedStatus);

    QMqttClient client;
    client.setProtocolVersion(QMqttClient::MQTT_5_0);
    client.setHostname(m_testBroker);
    client.setPort(m_port);

    client.connectToHost();
    QTRY_VERIFY2(client.state() == QMqttClient::Connected, "Could not connect to broker.");

    const QString topic = QLatin1String("Qt/client/statusCheck");

    connect(&client, &QMqttClient::messageStatusChanged, [&expectedStatus](qint32,
                QMqtt::MessageStatus s,
                const QMqttMessageStatusProperties &)
    {
        QCOMPARE(s, expectedStatus.first());
        expectedStatus.takeFirst();
    });

    QSignalSpy publishSpy(&client, &QMqttClient::messageSent);
    client.publish(topic, QByteArray("someContent"), quint8(qos));
    QTRY_VERIFY2(publishSpy.count() == 1, "Could not publish message");
    QTRY_VERIFY2(expectedStatus.isEmpty(), "Did not receive all status updates.");
}

void Tst_QMqttClient::messageStatusReceive_data()
{
    QTest::addColumn<int>("qos");
    QTest::addColumn<QList<QMqtt::MessageStatus>>("expectedStatus");

    QTest::newRow("QoS1") << 1 << (QList<QMqtt::MessageStatus>() << QMqtt::MessageStatus::Published);
    QTest::newRow("QoS2") << 2 << (QList<QMqtt::MessageStatus>() << QMqtt::MessageStatus::Published
                                   << QMqtt::MessageStatus::Released);
}

void Tst_QMqttClient::messageStatusReceive()
{
    QFETCH(int, qos);
    QFETCH(QList<QMqtt::MessageStatus>, expectedStatus);

    QMqttClient publisher;
    publisher.setProtocolVersion(QMqttClient::MQTT_5_0);
    publisher.setHostname(m_testBroker);
    publisher.setPort(m_port);

    publisher.connectToHost();
    QTRY_VERIFY2(publisher.state() == QMqttClient::Connected, "Could not connect to broker.");

    QMqttClient subscriber;
    subscriber.setProtocolVersion(QMqttClient::MQTT_5_0);
    subscriber.setHostname(m_testBroker);
    subscriber.setPort(m_port);

    subscriber.connectToHost();
    QTRY_VERIFY2(subscriber.state() == QMqttClient::Connected, "Could not connect to broker.");

    const QString topic = QLatin1String("Qt/client/statusCheckReceive");

    auto subscription = subscriber.subscribe(topic, quint8(qos));
    QTRY_VERIFY2(subscription->state() == QMqttSubscription::Subscribed, "Could not subscribe to topic");
    QVERIFY(subscription->qos() >= qos);

    connect(&subscriber, &QMqttClient::messageStatusChanged, [&expectedStatus](qint32,
                QMqtt::MessageStatus s,
                const QMqttMessageStatusProperties &)
    {
        QCOMPARE(s, expectedStatus.first());
        expectedStatus.takeFirst();
    });

    QSignalSpy publishSpy(&publisher, &QMqttClient::messageSent);
    QSignalSpy receiveSpy(&subscriber, &QMqttClient::messageReceived);

    publisher.publish(topic, QByteArray("someContent"), quint8(qos));
    QTRY_VERIFY2(publishSpy.count() == 1, "Could not publish message");
    QTRY_VERIFY2(receiveSpy.count() == 1, "Did not receive message");

    QTRY_VERIFY2(expectedStatus.isEmpty(), "Did not receive all status updates.");
}

void Tst_QMqttClient::subscriptionIdsOverlap()
{

    const QString topic = QLatin1String("Qt/client/idcheck");

    QMqttClient pub;
    pub.setProtocolVersion(QMqttClient::MQTT_5_0);
    pub.setHostname(m_testBroker);
    pub.setPort(m_port);

    pub.connectToHost();
    QTRY_VERIFY2(pub.state() == QMqttClient::Connected, "Could not connect publisher.");

    QMqttClient subClientA;
    subClientA.setProtocolVersion(QMqttClient::MQTT_5_0);
    subClientA.setHostname(m_testBroker);
    subClientA.setPort(m_port);

    subClientA.connectToHost();
    QTRY_VERIFY2(subClientA.state() == QMqttClient::Connected, "Could not connect subscriber A.");

    QMqttSubscriptionProperties subAProp;
    subAProp.setSubscriptionIdentifier(8);
    auto subA = subClientA.subscribe(topic, subAProp, 1);
    QTRY_VERIFY2(subA->state() == QMqttSubscription::Subscribed, "Could not subscibe A.");

    int receiveACounter = 0;
    connect(subA, &QMqttSubscription::messageReceived, [&receiveACounter](QMqttMessage msg) {
        qDebug() << "Sub A received:" << msg.publishProperties().subscriptionIdentifiers();

        receiveACounter++;
    });

    QMqttClient subClientB;
    subClientB.setProtocolVersion(QMqttClient::MQTT_5_0);
    subClientB.setHostname(m_testBroker);
    subClientB.setPort(m_port);

    subClientB.connectToHost();
    QTRY_VERIFY2(subClientB.state() == QMqttClient::Connected, "Could not connect subscriber A.");

    QMqttSubscriptionProperties subBProp;
    subBProp.setSubscriptionIdentifier(9);
    auto subB = subClientB.subscribe(topic, subBProp, 1);
    QTRY_VERIFY2(subB->state() == QMqttSubscription::Subscribed, "Could not subscibe A.");

    int receiveBCounter = 2;
    connect(subB, &QMqttSubscription::messageReceived, [&receiveBCounter](QMqttMessage msg) {
        qDebug() << "Sub B received:" << msg.publishProperties().subscriptionIdentifiers();
        QVERIFY(msg.publishProperties().subscriptionIdentifiers().size() > 0);
        receiveBCounter -= msg.publishProperties().subscriptionIdentifiers().size();
    });

    QMqttSubscriptionProperties subB2Prop;
    subB2Prop.setSubscriptionIdentifier(14);
    auto subB2 = subClientB.subscribe(topic + "/#", subB2Prop, 1);
    QTRY_VERIFY2(subB2->state() == QMqttSubscription::Subscribed, "Could not subscibe A.");

    int receiveB2Counter = 2;
    connect(subB2, &QMqttSubscription::messageReceived, [&receiveB2Counter](QMqttMessage msg) {
        qDebug() << "Sub B2 received:" << msg.publishProperties().subscriptionIdentifiers();
        QVERIFY(msg.publishProperties().subscriptionIdentifiers().size() > 0);
        receiveB2Counter -= msg.publishProperties().subscriptionIdentifiers().size();
    });

    QSignalSpy publishSpy(&pub, &QMqttClient::messageSent);
    pub.publish(topic, "SomeData", 1);
    QTRY_VERIFY2(publishSpy.count() == 1, "Could not finalize publication.");
    QTRY_VERIFY2(receiveBCounter == 0, "Did not receive both messages.");
    QTRY_VERIFY2(receiveB2Counter == 0, "Did not receive both messages.");
    QTRY_VERIFY2(receiveACounter == 1, "Did not receive non-overlapping message.");
}

DefaultVersionTestData(Tst_QMqttClient::keepAlive_data)

void Tst_QMqttClient::keepAlive()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);
    const quint16 keepAlive = 1;

    VersionClient(mqttVersion, client);
    client.setHostname(m_testBroker);
    client.setPort(m_port);

    client.setKeepAlive(keepAlive);
    QCOMPARE(client.keepAlive(), keepAlive);
    QCOMPARE(client.autoKeepAlive(), true); 

    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Connected);

    if (client.protocolVersion() == QMqttClient::MQTT_5_0) {
        const auto serverProps = client.serverConnectionProperties();
        if (serverProps.isValid() && serverProps.availableProperties() & QMqttServerConnectionProperties::ServerKeepAlive) {
            if (serverProps.serverKeepAlive() == 0 || serverProps.serverKeepAlive() > keepAlive) {
                qDebug() << "Server specifies keepAlive which cannot be used for this test";
                return;
            }
        }
    }

    client.setAutoKeepAlive(false);
    QCOMPARE(client.autoKeepAlive(), true);

    const bool sent = client.requestPing();
    QCOMPARE(sent, false);

    QSignalSpy spy(&client, &QMqttClient::pingResponseReceived);
    QTRY_VERIFY_WITH_TIMEOUT(spy.count() == 5, keepAlive * 1000 * 5 * 2);
    spy.clear();

    client.disconnectFromHost();
    QTRY_COMPARE(client.state(), QMqttClient::Disconnected);

    client.setAutoKeepAlive(false);
    QCOMPARE(client.autoKeepAlive(), false);
    client.setKeepAlive(keepAlive);

    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Connected);

    QTRY_COMPARE_WITH_TIMEOUT(client.state(), QMqttClient::Disconnected, keepAlive * 1000 * 5 * 2);

    QTimer t;
    t.setInterval(keepAlive * 1000);
    t.setSingleShot(false);
    t.connect(&t, &QTimer::timeout, [&client]() {
        client.requestPing();
    });

    connect(&client, &QMqttClient::connected, [&t]() {
        t.start();
    });

    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Connected);

    QTRY_VERIFY_WITH_TIMEOUT(spy.count() == 5, keepAlive * 1000 * 5 * 2);

    client.disconnectFromHost();
    QTRY_COMPARE(client.state(), QMqttClient::Disconnected);
}

QTEST_MAIN(Tst_QMqttClient)

#include "tst_qmqttclient.moc"
/******************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtMqtt module.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
******************************************************************************/

#include "broker_connection.h"

#include <QtCore/QString>
#include <QtNetwork/QTcpServer>
#include <QtTest/QtTest>
#include <QtTest/QSignalSpy>
#include <QtMqtt/QMqttClient>

#include <limits>

class Tst_QMqttClient : public QObject
{
    Q_OBJECT

public:
    Tst_QMqttClient();

private Q_SLOTS:
    void initTestCase();
    void cleanupTestCase();
    void getSetCheck_data();
    void getSetCheck();
    void sendReceive_data();
    void sendReceive();
    void retainMessage_data();
    void retainMessage();
    void willMessage_data();
    void willMessage();
    void compliantTopic_data();
    void compliantTopic();
    void subscribeLongTopic_data();
    void subscribeLongTopic();
    void dataIncludingZero_data();
    void dataIncludingZero();
    void publishLongTopic_data();
    void publishLongTopic();
    void reconnect_QTBUG65726_data();
    void reconnect_QTBUG65726();
    void openIODevice_QTBUG66955_data();
    void openIODevice_QTBUG66955();
    void staticProperties_QTBUG_67176_data();
    void staticProperties_QTBUG_67176();
    void authentication();
    void messageStatus_data();
    void messageStatus();
    void messageStatusReceive_data();
    void messageStatusReceive();
    void subscriptionIdsOverlap();
    void keepAlive_data();
    void keepAlive();
private:
    QProcess m_brokerProcess;
    QString m_testBroker;
    quint16 m_port{1883};
};

Tst_QMqttClient::Tst_QMqttClient()
{
}

void Tst_QMqttClient::initTestCase()
{
    m_testBroker = invokeOrInitializeBroker(&m_brokerProcess);
    if (m_testBroker.isEmpty())
        qFatal("No MQTT broker present to test against.");
}

void Tst_QMqttClient::cleanupTestCase()
{
}

DefaultVersionTestData(Tst_QMqttClient::getSetCheck_data)

void Tst_QMqttClient::getSetCheck()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);
    VersionClient(mqttVersion, client);

    QVERIFY(client.clientId().size() > 0);
    const QString clientId = QLatin1String("testclient123");
    client.setClientId(clientId);
    QCOMPARE(client.clientId(), clientId);

    QCOMPARE(client.hostname(), QString());
    const QString hostname = QLatin1String("qt.io");
    client.setHostname(hostname);
    QCOMPARE(client.hostname(), hostname);

    QCOMPARE(client.port(), quint16(0));
    client.setPort(1883);
    QCOMPARE(client.port(), quint16(1883));

    QCOMPARE(client.keepAlive(), quint16(60));
    client.setKeepAlive(10);
    QCOMPARE(client.keepAlive(), quint16(10));

    // Available protocol versions
    QMqttClient client2;
    QCOMPARE(client2.protocolVersion(), QMqttClient::MQTT_3_1_1);
    client2.setProtocolVersion(QMqttClient::ProtocolVersion(0));
    QCOMPARE(client2.protocolVersion(), QMqttClient::MQTT_3_1_1);
    client2.setProtocolVersion(QMqttClient::ProtocolVersion(6));
    QCOMPARE(client2.protocolVersion(), QMqttClient::MQTT_3_1_1);
    client2.setProtocolVersion(QMqttClient::MQTT_3_1);
    QCOMPARE(client2.protocolVersion(), QMqttClient::MQTT_3_1);
    client2.setProtocolVersion(QMqttClient::MQTT_5_0);
    QCOMPARE(client2.protocolVersion(), QMqttClient::MQTT_5_0);

#ifdef QT_BUILD_INTERNAL
    if (qEnvironmentVariableIsSet("QT_MQTT_TEST_USERNAME"))
        QEXPECT_FAIL("", "Default username has been overwritten.", Continue);
#endif
    QCOMPARE(client.username(), QString());
#ifdef QT_BUILD_INTERNAL
    if (qEnvironmentVariableIsSet("QT_MQTT_TEST_PASSWORD"))
        QEXPECT_FAIL("", "Default username has been overwritten.", Continue);
#endif
    QCOMPARE(client.password(), QString());
    QCOMPARE(client.cleanSession(), true);
    QCOMPARE(client.willTopic(), QString());
    QCOMPARE(client.willMessage(), QByteArray());
    QCOMPARE(client.willQoS(), quint8(0));
    QCOMPARE(client.willRetain(), false);
    QCOMPARE(client.autoKeepAlive(), true);
    client.setAutoKeepAlive(false);
    QCOMPARE(client.autoKeepAlive(), false);
}

void Tst_QMqttClient::sendReceive_data()
{
    QTest::addColumn<QMqttClient::ProtocolVersion>("mqttVersion");
    QTest::addColumn<QByteArray>("data");

    QList<QMqttClient::ProtocolVersion> versions{QMqttClient::MQTT_3_1_1, QMqttClient::MQTT_5_0};

    for (int i = 0; i < 2; ++i) {
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":empty")) << versions[i] << QByteArray();
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":simple")) << versions[i] << QByteArray("This is a test message");
        QByteArray d;
        d.fill('A', 500);
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":big")) << versions[i] << d;
        d.fill('B', (128 * 128 * 128) + 4);
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":huge")) << versions[i] << d;
    }
}

void Tst_QMqttClient::sendReceive()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);
    QFETCH(QByteArray, data);
    const QString testTopic = QLatin1String("Qt/QMqttClient/Topic");

    VersionClient(mqttVersion, publisher);
    publisher.setClientId(QLatin1String("publisher"));
    publisher.setHostname(m_testBroker);
    publisher.setPort(m_port);

    publisher.connectToHost();
    QTRY_COMPARE(publisher.state(), QMqttClient::Connected);

    VersionClient(mqttVersion, subscriber);
    subscriber.setClientId(QLatin1String("subscriber"));
    subscriber.setHostname(m_testBroker);
    subscriber.setPort(m_port);

    subscriber.connectToHost();
    QTRY_COMPARE(subscriber.state(), QMqttClient::Connected);

    bool received = false;
    bool verified = false;
    auto sub = subscriber.subscribe(testTopic, 1);
    QVERIFY(sub);
    connect(sub, &QMqttSubscription::messageReceived, [&](QMqttMessage msg) {
        verified = msg.payload() == data;
        received = true;
    });

    QTRY_COMPARE(sub->state(), QMqttSubscription::Subscribed);

    if (subscriber.protocolVersion() == QMqttClient::MQTT_5_0 &&
            (quint32)data.size() > subscriber.serverConnectionProperties().maximumPacketSize())
        QSKIP("The MQTT 5 test broker does not support huge packages.", SkipOnce);
    publisher.publish(testTopic, data, 1);

    QTRY_VERIFY2(received, "Subscriber did not receive message");
    QVERIFY2(verified, "Subscriber received different message");
}

DefaultVersionTestData(Tst_QMqttClient::retainMessage_data)

void Tst_QMqttClient::retainMessage()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    const QString testTopic = QLatin1String("Qt/QMqttClient/Topic2");
    const QByteArray testMessage("retainedMessage");

    // Publisher
    VersionClient(mqttVersion, publisher);
    publisher.setClientId(QLatin1String("publisher"));
    publisher.setHostname(m_testBroker);
    publisher.setPort(m_port);

    publisher.connectToHost();
    QTRY_COMPARE(publisher.state(), QMqttClient::Connected);

    // [MQTT-3.3.1-7]
    // If the Server receives a QoS 0 message with the RETAIN flag set to 1 it MUST
    // discard any message previously retained for that topic. It SHOULD store the
    // new QoS 0 message
    publisher.publish(testTopic, QByteArray(), 0, true);
    // We cannot wait as 0 QoS does not send confirmation
    QTest::qWait(500);

    for (int i = 0; i < 2; i++) {
        int msgCount = 0;

        QSignalSpy publishSpy(&publisher, SIGNAL(messageSent(qint32)));
        publisher.publish(testTopic, testMessage, 1, i == 1 ? true : false);
        QTRY_COMPARE(publishSpy.count(), 1);

        VersionClient(mqttVersion, sub);
        sub.setClientId(QLatin1String("SubA"));
        sub.setHostname(m_testBroker);
        sub.setPort(m_port);
        connect(&sub, &QMqttClient::messageReceived, [&msgCount, testMessage](const QByteArray &msg) {
            if (msg == testMessage)
                msgCount++;
        });

        QSignalSpy messageSpy(&sub, SIGNAL(messageReceived(QByteArray,QMqttTopicName)));
        sub.connectToHost();
        QTRY_COMPARE(sub.state(), QMqttClient::Connected);

        auto subscription = sub.subscribe(testTopic);
        QTRY_COMPARE(subscription->state(), QMqttSubscription::Subscribed);

        QTRY_VERIFY(msgCount == i);
    }
    publisher.disconnect();
}

void Tst_QMqttClient::willMessage_data()
{
    QTest::addColumn<QMqttClient::ProtocolVersion>("mqttVersion");
    QTest::addColumn<QByteArray>("willMessage");

    QList<QMqttClient::ProtocolVersion> versions{QMqttClient::MQTT_3_1_1, QMqttClient::MQTT_5_0};

    for (int i = 0; i < 2; ++i) {
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":simple")) << versions[i] << QByteArray("The client connection is gone.");
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":empty")) << versions[i] << QByteArray();
    }
}

void Tst_QMqttClient::willMessage()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);
    QFETCH(QByteArray, willMessage);

    const QString willTopic = QLatin1String("Qt/QMqttClient/will/topic");

    // Client A connects
    VersionClient(mqttVersion, client1);
    client1.setHostname(m_testBroker);
    client1.setPort(m_port);
    client1.connectToHost();
    QTRY_COMPARE(client1.state(), QMqttClient::Connected);

    auto client1Sub = client1.subscribe(willTopic, 1);
    connect(client1Sub, &QMqttSubscription::messageReceived, [=](QMqttMessage message) {
        Q_UNUSED(message);
        // Just debug purposes
        //qDebug() << "Got something:" << message;
    });
    QTRY_COMPARE(client1Sub->state(), QMqttSubscription::Subscribed);

    QSignalSpy messageSpy(client1Sub, SIGNAL(messageReceived(QMqttMessage)));

    // Client B connects (via TcpSocket)
    QTcpSocket sock;
    sock.connectToHost(m_testBroker, m_port);
    QVERIFY(sock.waitForConnected());

    for (int i = 1; i > 0; --i) {
        VersionClient(mqttVersion, willClient);
        if (i == 1)
            willClient.setTransport(&sock, QMqttClient::AbstractSocket);
        else {
            willClient.setHostname(m_testBroker);
            willClient.setPort(m_port);
        }
        willClient.setWillQoS(1);
        willClient.setWillTopic(willTopic);
        willClient.setWillMessage(willMessage);
        willClient.connectToHost();
        QTRY_COMPARE(willClient.state(), QMqttClient::Connected);

        willClient.publish(QLatin1String("noninteresting"), "just something");

        // Be evil and kill the connection without DISCONNECT
        // Should send will message to client1.
        // When you manually disconnect (send the DISCONNECT command) no will message
        // is sent
        if (i == 1)
            sock.disconnectFromHost();
        else
            willClient.disconnectFromHost();
        QTest::qWait(500);
        QTRY_COMPARE(messageSpy.count(), i);
    }
}

void Tst_QMqttClient::compliantTopic_data()
{
    QTest::addColumn<QMqttClient::ProtocolVersion>("mqttVersion");
    QTest::addColumn<QString>("topic");

    QList<QMqttClient::ProtocolVersion> versions{QMqttClient::MQTT_3_1_1, QMqttClient::MQTT_5_0};

    for (int i = 0; i < 2; ++i) {
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":simple")) << versions[i] << QString::fromLatin1("Qt/QMqttClient/topic");
        QTest::newRow(qPrintable(QString::number(versions[i]) + ":subPath")) << versions[i] << QString::fromLatin1("Qt/QMqttClient/topic/subtopic");

        if (versions[i] != QMqttClient::MQTT_5_0) {
            QString l;
            l.fill(QLatin1Char('T'), std::numeric_limits<std::uint16_t>::max());
            QTest::newRow(qPrintable(QString::number(versions[i]) + ":maxSize")) << versions[i] << l;
        }
    }
}

void Tst_QMqttClient::compliantTopic()
{
    QFETCH(QString, topic);
    QString truncTopic = topic;
    truncTopic.truncate(std::numeric_limits<std::uint16_t>::max());

    QMqttClient publisher;
    publisher.setClientId(QLatin1String("publisher"));
    publisher.setHostname(m_testBroker);
    publisher.setPort(m_port);

    publisher.connectToHost();
    QTRY_COMPARE(publisher.state(), QMqttClient::Connected);

    QMqttClient subscriber;
    subscriber.setClientId(QLatin1String("subscriber"));
    subscriber.setHostname(m_testBroker);
    subscriber.setPort(m_port);

    subscriber.connectToHost();
    QTRY_COMPARE(subscriber.state(), QMqttClient::Connected);

    bool received = false;
    bool verified = false;
    connect(&subscriber, &QMqttClient::messageReceived, [&](const QByteArray &, const QMqttTopicName &t) {
        received = true;
        verified = t == truncTopic;
    });

    auto client1Sub = subscriber.subscribe(truncTopic, 1);
    QTRY_COMPARE(client1Sub->state(), QMqttSubscription::Subscribed);

    publisher.publish(topic, QByteArray("Msgs"), 1);

    QTRY_VERIFY2(received, "Subscriber did not receive message");
    QVERIFY2(verified, "Subscriber received different message");
}

DefaultVersionTestData(Tst_QMqttClient::subscribeLongTopic_data)

void Tst_QMqttClient::subscribeLongTopic()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    VersionClient(mqttVersion, subscriber);
    subscriber.setClientId(QLatin1String("subscriber"));
    subscriber.setHostname(m_testBroker);
    subscriber.setPort(m_port);

    subscriber.connectToHost();
    QTRY_COMPARE(subscriber.state(), QMqttClient::Connected);

    QString topic;
    topic.fill(QLatin1Char('s'), 2 * std::numeric_limits<std::uint16_t>::max());
    auto sub = subscriber.subscribe(topic);
    QCOMPARE(sub, nullptr);
}

DefaultVersionTestData(Tst_QMqttClient::dataIncludingZero_data)

void Tst_QMqttClient::dataIncludingZero()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    QByteArray data;
    const int dataSize = 200;
    data.fill('A', dataSize);
    data[100] = '\0';

    VersionClient(mqttVersion, client);
    client.setHostname(m_testBroker);
    client.setPort(m_port);

    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Connected);

    bool received = false;
    bool verified = false;
    bool correctSize = false;
    const QString testTopic(QLatin1String("Qt/QMqttClient/some/topic"));
    auto sub = client.subscribe(testTopic, 1);
    QVERIFY(sub);
    connect(sub, &QMqttSubscription::messageReceived, [&](QMqttMessage msg) {
        verified = msg.payload() == data;
        correctSize = msg.payload().size() == dataSize;
        received = true;
    });

    QTRY_COMPARE(sub->state(), QMqttSubscription::Subscribed);

    client.publish(testTopic, data, 1);

    QTRY_VERIFY2(received, "Subscriber did not receive message");
    QVERIFY2(verified, "Subscriber received different message");
    QVERIFY2(correctSize, "Subscriber received message of different size");
}

DefaultVersionTestData(Tst_QMqttClient::publishLongTopic_data)

void Tst_QMqttClient::publishLongTopic()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    VersionClient(mqttVersion, publisher);
    publisher.setClientId(QLatin1String("publisher"));
    publisher.setHostname(m_testBroker);
    publisher.setPort(m_port);

    publisher.connectToHost();
    QTRY_COMPARE(publisher.state(), QMqttClient::Connected);

    QString topic;
    topic.fill(QLatin1Char('s'), 2 * std::numeric_limits<std::uint16_t>::max());
    auto pub = publisher.publish(topic);
    QCOMPARE(pub, -1);
}

class FakeServer : public QObject
{
    Q_OBJECT
public:
    FakeServer() {
        server = new QTcpServer(this);
        connect(server, &QTcpServer::newConnection, this, &FakeServer::createSocket);
        server->listen(QHostAddress::Any, 5726);
    }
public slots:
    void createSocket() {
        socket = server->nextPendingConnection();
        connect(socket, &QTcpSocket::readyRead, this, &FakeServer::connectionRequested);
    }

    void connectionRequested() {
        // We assume it is always a connect statement, so no verification is done
        socket->readAll();
        QByteArray response;
        response += 0x20;
        response += quint8(2); // Payload size
        if (!connectionSuccess) {
            response += quint8(255); // Causes ProtocolViolation
            response += quint8(13);
        } else {
            response += char(0); // ackFlags
            response += char(0); // result
            if (version == QMqttClient::MQTT_5_0) {
                response += char(0); // No properties
                response[1] = response[1] + 1; // Adjust payload size
            }
        }
        qDebug() << "Fake server response:" << connectionSuccess;
        socket->write(response);
    }
public:
    QTcpServer *server;
    QTcpSocket *socket;
    QMqttClient::ProtocolVersion version{QMqttClient::MQTT_3_1_1};
    bool connectionSuccess{false};
};

DefaultVersionTestData(Tst_QMqttClient::reconnect_QTBUG65726_data)

void Tst_QMqttClient::reconnect_QTBUG65726()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    FakeServer server;

    VersionClient(mqttVersion, client);
    client.setClientId(QLatin1String("bugclient"));
    client.setHostname(QLatin1String("localhost"));
    client.setPort(5726);

    server.version = client.protocolVersion();

    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Disconnected);
    QTRY_COMPARE(client.error(), QMqttClient::ProtocolViolation);

    server.connectionSuccess = true;

    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Connected);
    QTRY_COMPARE(client.error(), QMqttClient::NoError);
}

class IOTransport : public QIODevice
{
public:
    bool open(OpenMode mode) override {
        return QIODevice::open(mode);
    }
    qint64 readData(char *data, qint64 maxlen) override {
        Q_UNUSED(data);
        Q_UNUSED(maxlen);
        return 0;
    }
    qint64 writeData(const char *data, qint64 len) override {
        Q_UNUSED(data);
        Q_UNUSED(len);
        if (data[0] == 0x10)
            written = 1;
        else
            qDebug() << "Received unknown/invalid data";
        return len;
    }
    QAtomicInt written{0};
};

DefaultVersionTestData(Tst_QMqttClient::openIODevice_QTBUG66955_data)

void Tst_QMqttClient::openIODevice_QTBUG66955()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    IOTransport trans;
    trans.open(QIODevice::ReadWrite);

    VersionClient(mqttVersion, client);
    client.setTransport(&trans, QMqttClient::IODevice);
    client.connectToHost();

    QTRY_COMPARE(trans.written, 1);
}

DefaultVersionTestData(Tst_QMqttClient::staticProperties_QTBUG_67176_data)

void Tst_QMqttClient::staticProperties_QTBUG_67176()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);

    VersionClient(mqttVersion, client);
    client.setHostname(m_testBroker);
    client.setPort(m_port);

    const QString clientId = client.clientId();
    const quint16 keepAlive = client.keepAlive();
    const bool clean = client.cleanSession();

    client.connectToHost();
    QTRY_VERIFY2(client.state() == QMqttClient::Connected, "Could not connect to broker.");

    client.setClientId(QLatin1String("someclient"));
    QCOMPARE(client.clientId(), clientId);

    client.setHostname(QLatin1String("some.domain.foo"));
    QCOMPARE(client.hostname(), m_testBroker);

    client.setPort(1234);
    QCOMPARE(client.port(), m_port);

    client.setKeepAlive(keepAlive + 10);
    QCOMPARE(client.keepAlive(), keepAlive);

    client.setProtocolVersion(QMqttClient::MQTT_3_1);
    QCOMPARE(client.protocolVersion(), mqttVersion);

    client.setUsername(QLatin1String("someUser"));
    QCOMPARE(client.username(), QLatin1String());

    client.setPassword(QLatin1String("somePassword"));
    QCOMPARE(client.password(), QLatin1String());

    client.setCleanSession(!clean);
    QCOMPARE(client.cleanSession(), clean);
}

void Tst_QMqttClient::authentication()
{
    QMqttClient client;
    client.setProtocolVersion(QMqttClient::MQTT_5_0);
    client.setHostname(m_testBroker);
    client.setPort(m_port);

    QMqttConnectionProperties connectionProperties;
    connectionProperties.setAuthenticationMethod(QLatin1String("SCRAM-SHA-1"));
    client.setConnectionProperties(connectionProperties);

    connect(&client, &QMqttClient::authenticationRequested, [](const QMqttAuthenticationProperties &prop)
    {
        qDebug() << "Authentication requested:" << prop.authenticationMethod();
    });

    connect(&client, &QMqttClient::authenticationFinished, [](const QMqttAuthenticationProperties &prop)
    {
        qDebug() << "Authentication finished:" << prop.authenticationMethod();
    });

    // ### FIXME : There is no public test broker yet able to handle authentication methods
    // Theoretically the broker should send an AUTH request, followed by AUTH call including
    // authentication data. See 4.12 of MQTT v5 specs.
    QSKIP("No broker available with enhanced authentication.");
    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Connected);
}

Q_DECLARE_METATYPE(QMqtt::MessageStatus)

void Tst_QMqttClient::messageStatus_data()
{
    QTest::addColumn<int>("qos");
    QTest::addColumn<QList<QMqtt::MessageStatus>>("expectedStatus");

    QTest::newRow("QoS1") << 1 << (QList<QMqtt::MessageStatus>() << QMqtt::MessageStatus::Acknowledged);
    QTest::newRow("QoS2") << 2 << (QList<QMqtt::MessageStatus>() << QMqtt::MessageStatus::Received
                                   << QMqtt::MessageStatus::Completed);
}

void Tst_QMqttClient::messageStatus()
{
    QFETCH(int, qos);
    QFETCH(QList<QMqtt::MessageStatus>, expectedStatus);

    QMqttClient client;
    client.setProtocolVersion(QMqttClient::MQTT_5_0);
    client.setHostname(m_testBroker);
    client.setPort(m_port);

    client.connectToHost();
    QTRY_VERIFY2(client.state() == QMqttClient::Connected, "Could not connect to broker.");

    const QString topic = QLatin1String("Qt/client/statusCheck");

    connect(&client, &QMqttClient::messageStatusChanged, [&expectedStatus](qint32,
                QMqtt::MessageStatus s,
                const QMqttMessageStatusProperties &)
    {
        QCOMPARE(s, expectedStatus.first());
        expectedStatus.takeFirst();
    });

    QSignalSpy publishSpy(&client, &QMqttClient::messageSent);
    client.publish(topic, QByteArray("someContent"), quint8(qos));
    QTRY_VERIFY2(publishSpy.count() == 1, "Could not publish message");
    QTRY_VERIFY2(expectedStatus.isEmpty(), "Did not receive all status updates.");
}

void Tst_QMqttClient::messageStatusReceive_data()
{
    QTest::addColumn<int>("qos");
    QTest::addColumn<QList<QMqtt::MessageStatus>>("expectedStatus");

    QTest::newRow("QoS1") << 1 << (QList<QMqtt::MessageStatus>() << QMqtt::MessageStatus::Published);
    QTest::newRow("QoS2") << 2 << (QList<QMqtt::MessageStatus>() << QMqtt::MessageStatus::Published
                                   << QMqtt::MessageStatus::Released);
}

void Tst_QMqttClient::messageStatusReceive()
{
    QFETCH(int, qos);
    QFETCH(QList<QMqtt::MessageStatus>, expectedStatus);

    QMqttClient publisher;
    publisher.setProtocolVersion(QMqttClient::MQTT_5_0);
    publisher.setHostname(m_testBroker);
    publisher.setPort(m_port);

    publisher.connectToHost();
    QTRY_VERIFY2(publisher.state() == QMqttClient::Connected, "Could not connect to broker.");

    QMqttClient subscriber;
    subscriber.setProtocolVersion(QMqttClient::MQTT_5_0);
    subscriber.setHostname(m_testBroker);
    subscriber.setPort(m_port);

    subscriber.connectToHost();
    QTRY_VERIFY2(subscriber.state() == QMqttClient::Connected, "Could not connect to broker.");

    const QString topic = QLatin1String("Qt/client/statusCheckReceive");

    auto subscription = subscriber.subscribe(topic, quint8(qos));
    QTRY_VERIFY2(subscription->state() == QMqttSubscription::Subscribed, "Could not subscribe to topic");
    QVERIFY(subscription->qos() >= qos);

    connect(&subscriber, &QMqttClient::messageStatusChanged, [&expectedStatus](qint32,
                QMqtt::MessageStatus s,
                const QMqttMessageStatusProperties &)
    {
        QCOMPARE(s, expectedStatus.first());
        expectedStatus.takeFirst();
    });

    QSignalSpy publishSpy(&publisher, &QMqttClient::messageSent);
    QSignalSpy receiveSpy(&subscriber, &QMqttClient::messageReceived);

    publisher.publish(topic, QByteArray("someContent"), quint8(qos));
    QTRY_VERIFY2(publishSpy.count() == 1, "Could not publish message");
    QTRY_VERIFY2(receiveSpy.count() == 1, "Did not receive message");

    QTRY_VERIFY2(expectedStatus.isEmpty(), "Did not receive all status updates.");
}

void Tst_QMqttClient::subscriptionIdsOverlap()
{

    // If the Server sends a single copy of the message it MUST include in the
    // PUBLISH packet the Subscription Identifiers for all matching
    // subscriptions which have a Subscription Identifiers, their order is not
    // significant [MQTT-3.3.4-4].
    // If the Server sends multiple PUBLISH packets it MUST send, in each of
    // them, the Subscription Identifier of the matching subscription if it has
    // a Subscription Identifier [MQTT-3.3.4-5].

    const QString topic = QLatin1String("Qt/client/idcheck");
    // Connect publisher
    QMqttClient pub;
    pub.setProtocolVersion(QMqttClient::MQTT_5_0);
    pub.setHostname(m_testBroker);
    pub.setPort(m_port);

    pub.connectToHost();
    QTRY_VERIFY2(pub.state() == QMqttClient::Connected, "Could not connect publisher.");

    // Connect subA
    QMqttClient subClientA;
    subClientA.setProtocolVersion(QMqttClient::MQTT_5_0);
    subClientA.setHostname(m_testBroker);
    subClientA.setPort(m_port);

    subClientA.connectToHost();
    QTRY_VERIFY2(subClientA.state() == QMqttClient::Connected, "Could not connect subscriber A.");

    QMqttSubscriptionProperties subAProp;
    subAProp.setSubscriptionIdentifier(8);
    auto subA = subClientA.subscribe(topic, subAProp, 1);
    QTRY_VERIFY2(subA->state() == QMqttSubscription::Subscribed, "Could not subscibe A.");

    int receiveACounter = 0;
    connect(subA, &QMqttSubscription::messageReceived, [&receiveACounter](QMqttMessage msg) {
        qDebug() << "Sub A received:" << msg.publishProperties().subscriptionIdentifiers();
        // ### TODO: Wait for fix at https://github.com/eclipse/paho.mqtt.testing/issues/56
        //QVERIFY(msg.publishProperties().subscriptionIdentifiers().size() == 1);
        //QVERIFY(msg.publishProperties().subscriptionIdentifiers().at(0) == 8); // Use sub->id();
        receiveACounter++;
    });

    // Connect subB
    QMqttClient subClientB;
    subClientB.setProtocolVersion(QMqttClient::MQTT_5_0);
    subClientB.setHostname(m_testBroker);
    subClientB.setPort(m_port);

    subClientB.connectToHost();
    QTRY_VERIFY2(subClientB.state() == QMqttClient::Connected, "Could not connect subscriber A.");

    QMqttSubscriptionProperties subBProp;
    subBProp.setSubscriptionIdentifier(9);
    auto subB = subClientB.subscribe(topic, subBProp, 1);
    QTRY_VERIFY2(subB->state() == QMqttSubscription::Subscribed, "Could not subscibe A.");

    int receiveBCounter = 2;
    connect(subB, &QMqttSubscription::messageReceived, [&receiveBCounter](QMqttMessage msg) {
        qDebug() << "Sub B received:" << msg.publishProperties().subscriptionIdentifiers();
        QVERIFY(msg.publishProperties().subscriptionIdentifiers().size() > 0);
        receiveBCounter -= msg.publishProperties().subscriptionIdentifiers().size();
    });

    QMqttSubscriptionProperties subB2Prop;
    subB2Prop.setSubscriptionIdentifier(14);
    auto subB2 = subClientB.subscribe(topic + "/#", subB2Prop, 1);
    QTRY_VERIFY2(subB2->state() == QMqttSubscription::Subscribed, "Could not subscibe A.");

    int receiveB2Counter = 2;
    connect(subB2, &QMqttSubscription::messageReceived, [&receiveB2Counter](QMqttMessage msg) {
        qDebug() << "Sub B2 received:" << msg.publishProperties().subscriptionIdentifiers();
        QVERIFY(msg.publishProperties().subscriptionIdentifiers().size() > 0);
        receiveB2Counter -= msg.publishProperties().subscriptionIdentifiers().size();
    });

    QSignalSpy publishSpy(&pub, &QMqttClient::messageSent);
    pub.publish(topic, "SomeData", 1);
    QTRY_VERIFY2(publishSpy.count() == 1, "Could not finalize publication.");
    QTRY_VERIFY2(receiveBCounter == 0, "Did not receive both messages.");
    QTRY_VERIFY2(receiveB2Counter == 0, "Did not receive both messages.");
    QTRY_VERIFY2(receiveACounter == 1, "Did not receive non-overlapping message.");
}

DefaultVersionTestData(Tst_QMqttClient::keepAlive_data)

void Tst_QMqttClient::keepAlive()
{
    QFETCH(QMqttClient::ProtocolVersion, mqttVersion);
    const quint16 keepAlive = 1;

    VersionClient(mqttVersion, client);
    client.setHostname(m_testBroker);
    client.setPort(m_port);

    client.setKeepAlive(keepAlive);
    QCOMPARE(client.keepAlive(), keepAlive);
    QCOMPARE(client.autoKeepAlive(), true); // default

    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Connected);

    if (client.protocolVersion() == QMqttClient::MQTT_5_0) {
        const auto serverProps = client.serverConnectionProperties();
        if (serverProps.isValid() && serverProps.availableProperties() & QMqttServerConnectionProperties::ServerKeepAlive) {
            if (serverProps.serverKeepAlive() == 0 || serverProps.serverKeepAlive() > keepAlive) {
                qDebug() << "Server specifies keepAlive which cannot be used for this test";
                return;
            }
        }
    }

    // Changing autoKeepAlive is not possible while connected
    client.setAutoKeepAlive(false);
    QCOMPARE(client.autoKeepAlive(), true);

    // Sending a manual ping request with autoKeepAlive is not allowed
    // and will be suppressed.
    const bool sent = client.requestPing();
    QCOMPARE(sent, false);

    // Verify auto keep alive works
    QSignalSpy spy(&client, &QMqttClient::pingResponseReceived);
    QTRY_VERIFY_WITH_TIMEOUT(spy.count() == 5, keepAlive * 1000 * 5 * 2);
    spy.clear();

    client.disconnectFromHost();
    QTRY_COMPARE(client.state(), QMqttClient::Disconnected);

    // Set manual keepAlive
    client.setAutoKeepAlive(false);
    QCOMPARE(client.autoKeepAlive(), false);
    client.setKeepAlive(keepAlive);

    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Connected);

    // Check for timeout / disconnect when not ping sent
    QTRY_COMPARE_WITH_TIMEOUT(client.state(), QMqttClient::Disconnected, keepAlive * 1000 * 5 * 2);

    // Check manual ping
    QTimer t;
    t.setInterval(keepAlive * 1000);
    t.setSingleShot(false);
    t.connect(&t, &QTimer::timeout, [&client]() {
        client.requestPing();
    });

    connect(&client, &QMqttClient::connected, [&t]() {
        t.start();
    });

    client.connectToHost();
    QTRY_COMPARE(client.state(), QMqttClient::Connected);

    QTRY_VERIFY_WITH_TIMEOUT(spy.count() == 5, keepAlive * 1000 * 5 * 2);

    client.disconnectFromHost();
    QTRY_COMPARE(client.state(), QMqttClient::Disconnected);
}

QTEST_MAIN(Tst_QMqttClient)

#include "tst_qmqttclient.moc"
