/****************************************************************************
**
** Copyright (C) 2014 Kurt Pattyn <pattyn.kurt@gmail.com>.
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtWebSockets module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "sslechoserver.h"
#include "QtWebSockets/QWebSocketServer"
#include "QtWebSockets/QWebSocket"
#include <QtCore/QDebug>
#include <QtCore/QFile>
#include <QtNetwork/QSslCertificate>
#include <QtNetwork/QSslKey>

QT_USE_NAMESPACE

//! [constructor]
SslEchoServer::SslEchoServer(quint16 port, QObject *parent) :
    QObject(parent),
    m_pWebSocketServer(Q_NULLPTR),
    m_clients()
{
    m_pWebSocketServer = new QWebSocketServer(QStringLiteral("SSL Echo Server"),
                                              QWebSocketServer::SecureMode,
                                              this);
    QSslConfiguration sslConfiguration;
    QFile certFile(QStringLiteral("./localhost.cert"));
    QFile keyFile(QStringLiteral("./localhost.key"));
    certFile.open(QIODevice::ReadOnly);
    keyFile.open(QIODevice::ReadOnly);
    QSslCertificate certificate(&certFile, QSsl::Pem);
    QSslKey sslKey(&keyFile, QSsl::Rsa, QSsl::Pem);
    certFile.close();
    keyFile.close();
    sslConfiguration.setPeerVerifyMode(QSslSocket::VerifyNone);
    sslConfiguration.setLocalCertificate(certificate);
    sslConfiguration.setPrivateKey(sslKey);
    sslConfiguration.setProtocol(QSsl::TlsV1SslV3);
    m_pWebSocketServer->setSslConfiguration(sslConfiguration);

    if (m_pWebSocketServer->listen(QHostAddress::Any, port))
    {
        qDebug() << "SSL Echo Server listening on port" << port;
        connect(m_pWebSocketServer, &QWebSocketServer::newConnection,
                this, &SslEchoServer::onNewConnection);
        connect(m_pWebSocketServer, &QWebSocketServer::sslErrors,
                this, &SslEchoServer::onSslErrors);
    }
}
//! [constructor]

SslEchoServer::~SslEchoServer()
{
    m_pWebSocketServer->close();
    qDeleteAll(m_clients.begin(), m_clients.end());
}

//! [onNewConnection]
void SslEchoServer::onNewConnection()
{
    QWebSocket *pSocket = m_pWebSocketServer->nextPendingConnection();

    qDebug() << "Client connected:" << pSocket->peerName() << pSocket->origin();

    connect(pSocket, &QWebSocket::textMessageReceived, this, &SslEchoServer::processTextMessage);
    connect(pSocket, &QWebSocket::binaryMessageReceived,
            this, &SslEchoServer::processBinaryMessage);
    connect(pSocket, &QWebSocket::disconnected, this, &SslEchoServer::socketDisconnected);
    //connect(pSocket, &QWebSocket::pong, this, &SslEchoServer::processPong);

    m_clients << pSocket;
}
//! [onNewConnection]

//! [processTextMessage]
void SslEchoServer::processTextMessage(QString message)
{
    QWebSocket *pClient = qobject_cast<QWebSocket *>(sender());
    if (pClient)
    {
        pClient->sendTextMessage(message);
    }
}
//! [processTextMessage]

//! [processBinaryMessage]
void SslEchoServer::processBinaryMessage(QByteArray message)
{
    QWebSocket *pClient = qobject_cast<QWebSocket *>(sender());
    if (pClient)
    {
        pClient->sendBinaryMessage(message);
    }
}
//! [processBinaryMessage]

//! [socketDisconnected]
void SslEchoServer::socketDisconnected()
{
    qDebug() << "Client disconnected";
    QWebSocket *pClient = qobject_cast<QWebSocket *>(sender());
    if (pClient)
    {
        m_clients.removeAll(pClient);
        pClient->deleteLater();
    }
}

void SslEchoServer::onSslErrors(const QList<QSslError> &)
{
    qDebug() << "Ssl errors occurred";
}
//! [socketDisconnected]
