/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtBluetooth module of the Qt Toolkit.
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**     notice, this list of conditions and the following disclaimer.
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**     the documentation and/or other materials provided with the
**     distribution.
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****************************************************************************/

#include "chatserver.h"

#include <qbluetoothserver.h>
#include <qbluetoothsocket.h>
#include <qbluetoothlocaldevice.h>

//! [Service UUID]
static const QLatin1String serviceUuid("e8e10f95-1a70-4b27-9ccf-02010264e9c8");
//! [Service UUID]

ChatServer::ChatServer(QObject *parent)
:   QObject(parent), rfcommServer(0)
{
}

ChatServer::~ChatServer()
{
    stopServer();
}

void ChatServer::startServer(const QBluetoothAddress& localAdapter)
{
    if (rfcommServer)
        return;

    //! [Create the server]
    rfcommServer = new QBluetoothServer(QBluetoothServiceInfo::RfcommProtocol, this);
    connect(rfcommServer, SIGNAL(newConnection()), this, SLOT(clientConnected()));
    bool result = rfcommServer->listen(localAdapter);
    if (!result) {
        qWarning() << "Cannot bind chat server to" << localAdapter.toString();
        return;
    }
    //! [Create the server]

    //serviceInfo.setAttribute(QBluetoothServiceInfo::ServiceRecordHandle, (uint)0x00010010);

    //! [Class Uuuid must contain at least 1 entry]
    QBluetoothServiceInfo::Sequence classId;

    classId << QVariant::fromValue(QBluetoothUuid(QBluetoothUuid::SerialPort));
    serviceInfo.setAttribute(QBluetoothServiceInfo::BluetoothProfileDescriptorList,
                             classId);

    classId.prepend(QVariant::fromValue(QBluetoothUuid(serviceUuid)));

    serviceInfo.setAttribute(QBluetoothServiceInfo::ServiceClassIds, classId);
    //! [Class Uuuid must contain at least 1 entry]


    //! [Service name, description and provider]
    serviceInfo.setAttribute(QBluetoothServiceInfo::ServiceName, tr("Bt Chat Server"));
    serviceInfo.setAttribute(QBluetoothServiceInfo::ServiceDescription,
                             tr("Example bluetooth chat server"));
    serviceInfo.setAttribute(QBluetoothServiceInfo::ServiceProvider, tr("qt-project.org"));
    //! [Service name, description and provider]

    //! [Service UUID set]
    serviceInfo.setServiceUuid(QBluetoothUuid(serviceUuid));
    //! [Service UUID set]

    //! [Service Discoverability]
    QBluetoothServiceInfo::Sequence publicBrowse;
    publicBrowse << QVariant::fromValue(QBluetoothUuid(QBluetoothUuid::PublicBrowseGroup));
    serviceInfo.setAttribute(QBluetoothServiceInfo::BrowseGroupList,
                             publicBrowse);
    //! [Service Discoverability]

    //! [Protocol descriptor list]
    QBluetoothServiceInfo::Sequence protocolDescriptorList;
    QBluetoothServiceInfo::Sequence protocol;
    protocol << QVariant::fromValue(QBluetoothUuid(QBluetoothUuid::L2cap));
    protocolDescriptorList.append(QVariant::fromValue(protocol));
    protocol.clear();
    protocol << QVariant::fromValue(QBluetoothUuid(QBluetoothUuid::Rfcomm))
             << QVariant::fromValue(quint8(rfcommServer->serverPort()));
    protocolDescriptorList.append(QVariant::fromValue(protocol));
    serviceInfo.setAttribute(QBluetoothServiceInfo::ProtocolDescriptorList,
                             protocolDescriptorList);
    //! [Protocol descriptor list]

    //! [Register service]
    serviceInfo.registerService(localAdapter);
    //! [Register service]
}

//! [stopServer]
void ChatServer::stopServer()
{
    // Unregister service
    serviceInfo.unregisterService();

    // Close sockets
    qDeleteAll(clientSockets);

    // Close server
    delete rfcommServer;
    rfcommServer = 0;
}
//! [stopServer]

//! [sendMessage]
void ChatServer::sendMessage(const QString &message)
{
    QByteArray text = message.toUtf8() + '\n';

    foreach (QBluetoothSocket *socket, clientSockets)
        socket->write(text);
}
//! [sendMessage]

//! [clientConnected]
void ChatServer::clientConnected()
{
    QBluetoothSocket *socket = rfcommServer->nextPendingConnection();
    if (!socket)
        return;

    connect(socket, SIGNAL(readyRead()), this, SLOT(readSocket()));
    connect(socket, SIGNAL(disconnected()), this, SLOT(clientDisconnected()));
    clientSockets.append(socket);
    emit clientConnected(socket->peerName());
}
//! [clientConnected]

//! [clientDisconnected]
void ChatServer::clientDisconnected()
{
    QBluetoothSocket *socket = qobject_cast<QBluetoothSocket *>(sender());
    if (!socket)
        return;

    emit clientDisconnected(socket->peerName());

    clientSockets.removeOne(socket);

    socket->deleteLater();
}
//! [clientDisconnected]

//! [readSocket]
void ChatServer::readSocket()
{
    QBluetoothSocket *socket = qobject_cast<QBluetoothSocket *>(sender());
    if (!socket)
        return;

    while (socket->canReadLine()) {
        QByteArray line = socket->readLine().trimmed();
        emit messageReceived(socket->peerName(),
                             QString::fromUtf8(line.constData(), line.length()));
    }
}
//! [readSocket]
