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#include <QDebug>

#include <QUrl>

#include <QByteArray>

#include <QDataStream>

#include "datatransferer.h"

DataTransferer::DataTransferer(QObject *parent) :

    QObject(parent), m_dataTransferOngoing(false)

{

}

bool DataTransferer::dataTransferOngoing()

{

    return m_dataTransferOngoing;

}

// -------- Based on QTcp

DataTransfererQTcp::DataTransfererQTcp(QObject* parent)

:   DataTransferer(parent)

{

    qDebug("BearerEx DataTransferer QTcp created.");

    connect(&m_qsocket, SIGNAL(readyRead()), this, SLOT(readyRead()));

    connect(&m_qsocket, SIGNAL(connected()), this, SLOT(connected()));

    connect(&m_qsocket, SIGNAL(error(QAbstractSocket::SocketError)),

            this, SLOT(error(QAbstractSocket::SocketError)));

}

DataTransfererQTcp::~DataTransfererQTcp()

{

    qDebug("BearerEx DataTransferer QTcp destroyed.");

    m_qsocket.abort();

}

bool DataTransfererQTcp::transferData()

{

    if (m_dataTransferOngoing) {

        return false;

    }

    qDebug("BearerEx datatransfer for QTcp requested.");

    // Connect to host

    QUrl url("http://www.google.com.au");

    m_qsocket.connectToHost(url.host(), url.port(80));

    // m_qsocket.connectToHost("http://www.google.com", 80);

    // Wait for connected() signal.

    m_dataTransferOngoing = true;

    return true;

}

void DataTransfererQTcp::connected()

{

    qDebug("BearerEx DataTransfererQtcp connected, requesting data.");

    // Establish HTTP request

    //QByteArray request("GET / HTTP/1.1 \nHost: www.google.com\n\n");

    QByteArray request("GET / HTTP/1.1\n\n");

    // QByteArray request("GET /index.html HTTP/1.1 \n Host: www.google.com \n\n");

    qint64 dataWritten = m_qsocket.write(request);

    m_qsocket.flush();

    qDebug() << "BearerEx DataTransferQTcp wrote " << dataWritten << " bytes";

    // Start waiting for readyRead() of error()

}

void DataTransfererQTcp::readyRead()

{

    qDebug() << "BearerEx DataTransfererQTcp readyRead() with ";

    qint64 bytesAvailable = m_qsocket.bytesAvailable();

    qDebug() << bytesAvailable << " bytes available.";

    // QDataStream in(&m_qsocket);

    QByteArray array = m_qsocket.readAll();

    QString data = QString::fromAscii(array);

    // in >> data;

    qDebug() << "BearerEx DataTransferQTcp data received: " << data;

    m_dataTransferOngoing = false;

    // m_qsocket.error() returns uninitialized value in case no error has occured,

    // so emit '0'

    emit finished(0, bytesAvailable, "QAbstractSocket::SocketError");

}

void DataTransfererQTcp::error(QAbstractSocket::SocketError socketError)

{

    qDebug("BearerEx DataTransfererQTcp error(), aborting socket.");

    m_qsocket.abort();

    m_dataTransferOngoing = false;

    emit finished(socketError, 0, "QAbstractSocket::SocketError");

}

// -------- Based on QHttp

DataTransfererQHttp::DataTransfererQHttp(QObject* parent)

:   DataTransferer(parent)

{

    connect(&m_qhttp, SIGNAL(done(bool)), this, SLOT(done(bool)));

    qDebug("BearerEx DataTransferer QHttp created.");

}

DataTransfererQHttp::~DataTransfererQHttp()

{

    qDebug("BearerEx DataTransferer QHttp destroyed.");

}

bool DataTransfererQHttp::transferData()

{

    qDebug("BearerEx datatransfer for QHttp requested.");

    if (m_dataTransferOngoing) {

        return false;

    }

    QString urlstring("http://www.google.com");

    QUrl url(urlstring);

    m_qhttp.setHost(url.host(), QHttp::ConnectionModeHttp, url.port() == -1 ? 0 : url.port());

    m_qhttp.get(urlstring);

    m_dataTransferOngoing = true;

    return true;

}

void DataTransfererQHttp::done(bool /*error*/ )

{

    qDebug("BearerEx DatatransfererQHttp reply was finished (error code is type QHttp::Error).");

    qint64 dataReceived = 0;

    quint32 errorCode = m_qhttp.error();

    if (m_qhttp.error() == QHttp::NoError) {

        QString result(m_qhttp.readAll());

        dataReceived = result.length();

    }

    m_dataTransferOngoing = false;

    emit finished(errorCode, dataReceived, "QHttp::Error");

}

// -------- Based on QNetworkAccessManager

DataTransfererQNam::DataTransfererQNam(QObject* parent)

:   DataTransferer(parent)

{

    connect(&m_qnam, SIGNAL(finished(QNetworkReply*)),

            this, SLOT(replyFinished(QNetworkReply*)));

    qDebug("BearerEx DataTransferer QNam created.");

}

DataTransfererQNam::~DataTransfererQNam()

{

    qDebug("BearerEx DataTransferer QNam destroyed.");

}

bool DataTransfererQNam::transferData()

{

    qDebug("BearerEx datatransfer for QNam requested.");

    if (m_dataTransferOngoing) {

        return false;

    }

    m_qnam.get(QNetworkRequest(QUrl("http://www.google.com")));

    m_dataTransferOngoing = true;

    return true;

}

void DataTransfererQNam::replyFinished(QNetworkReply *reply)

{

    qDebug("BearerEx DatatransfererQNam reply was finished (error code is type QNetworkReply::NetworkError).");

    qint64 dataReceived = 0;

    quint32 errorCode = (quint32)reply->error();

    if (reply->error() == QNetworkReply::NoError) {

        QString result(reply->readAll());

        dataReceived = result.length();

    }

    m_dataTransferOngoing = false;

    emit finished(errorCode, dataReceived, "QNetworkReply::NetworkError");

    reply->deleteLater();

}