/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
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** This file is part of the QtQml 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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****************************************************************************/

#include "qlocalclientconnection.h"
#include "qpacketprotocol.h"
#include "qqmldebugserver.h"

#include <QtCore/qplugin.h>
#include <QtNetwork/qlocalsocket.h>

QT_BEGIN_NAMESPACE

class QLocalClientConnectionPrivate {
public:
    QLocalClientConnectionPrivate();

    bool block;
    QString filename;
    QLocalSocket *socket;
    QPacketProtocol *protocol;
    QQmlDebugServer *debugServer;
};

QLocalClientConnectionPrivate::QLocalClientConnectionPrivate() :
    block(false),
    socket(0),
    protocol(0),
    debugServer(0)
{
}

QLocalClientConnection::QLocalClientConnection() :
    d_ptr(new QLocalClientConnectionPrivate)
{
}

QLocalClientConnection::~QLocalClientConnection()
{
    if (isConnected())
        disconnect();
    delete d_ptr;
}

void QLocalClientConnection::setServer(QQmlDebugServer *server)
{
    Q_D(QLocalClientConnection);
    d->debugServer = server;
}

bool QLocalClientConnection::isConnected() const
{
    Q_D(const QLocalClientConnection);
    return d->socket && d->socket->state() == QLocalSocket::ConnectedState;
}

void QLocalClientConnection::send(const QList<QByteArray> &messages)
{
    Q_D(QLocalClientConnection);

    if (!isConnected() || !d->protocol || !d->socket)
        return;

    foreach (const QByteArray &message, messages) {
        QPacket pack;
        pack.writeRawData(message.data(), message.length());
        d->protocol->send(pack);
    }
    d->socket->flush();
}

void QLocalClientConnection::disconnect()
{
    Q_D(QLocalClientConnection);

    while (d->socket && d->socket->bytesToWrite() > 0)
        d->socket->waitForBytesWritten();

    // protocol might still be processing packages at this point
    d->protocol->deleteLater();
    d->protocol = 0;
    d->socket->deleteLater();
    d->socket = 0;
}

bool QLocalClientConnection::waitForMessage()
{
    Q_D(QLocalClientConnection);
    return d->protocol->waitForReadyRead(-1);
}

bool QLocalClientConnection::setPortRange(int portFrom, int portTo, bool block,
                                        const QString &hostaddress)
{
    Q_UNUSED(portFrom);
    Q_UNUSED(portTo);
    Q_UNUSED(block);
    Q_UNUSED(hostaddress);
    return false;
}

bool QLocalClientConnection::setFileName(const QString &filename, bool block)
{
    Q_D(QLocalClientConnection);
    d->filename = filename;
    d->block = block;
    return connect();
}

void QLocalClientConnection::waitForConnection()
{
    Q_D(QLocalClientConnection);
    d->socket->waitForConnected(-1);
}

bool QLocalClientConnection::connect()
{
    Q_D(QLocalClientConnection);

    d->socket = new QLocalSocket;
    d->socket->setParent(this);
    QObject::connect(d->socket, SIGNAL(connected()), this, SLOT(connectionEstablished()));
    d->socket->connectToServer(d->filename);
    qDebug("QML Debugger: Connecting to socket %s...",
           d->filename.toLatin1().constData());
    return true;
}

void QLocalClientConnection::readyRead()
{
    Q_D(QLocalClientConnection);
    if (!d->protocol)
        return;

    QPacket packet = d->protocol->read();

    QByteArray content = packet.data();
    d->debugServer->receiveMessage(content);
}

void QLocalClientConnection::connectionEstablished()
{
    Q_D(QLocalClientConnection);

    d->protocol = new QPacketProtocol(d->socket, this);
    QObject::connect(d->protocol, SIGNAL(readyRead()), this, SLOT(readyRead()));
    QObject::connect(d->protocol, SIGNAL(invalidPacket()), this, SLOT(invalidPacket()));

    if (d->block)
        d->protocol->waitForReadyRead(-1);
}

void QLocalClientConnection::invalidPacket()
{
    qWarning("QML Debugger: Received a corrupted packet! Giving up ...");
}

QT_END_NAMESPACE