#include <QNetworkAccessManager>

#include <QNetworkRequest>

#include <QNetworkReply>

#include <QDebug>

#include <QUrl>

#include "databrowser.h"

const QNetworkRequest::Attribute typeAttribute = (QNetworkRequest::Attribute)(QNetworkRequest::User + 1);

const QNetworkRequest::Attribute urlAttribute = (QNetworkRequest::Attribute)(QNetworkRequest::User + 2);

DataBrowser::DataBrowser(QWidget *parent) :

    QTextBrowser(parent)

{

    manager = new QNetworkAccessManager(this);

}

QVariant DataBrowser::loadResource(int type, const QUrl & name)

{

    if(type == QTextDocument::ImageResource || type == QTextDocument::StyleSheetResource)

    {

        if(resources.contains(name.toString()))

        {

            return resources.take(name.toString());

        }

        else if(!requestedResources.contains(name.toString()))

        {

            qDebug() << "Requesting resource" << name.toString();

            requestedResources.insert(name.toString());

            QNetworkRequest newRequest(QUrl("http://www.hedgewars.org" + name.toString()));

            newRequest.setAttribute(typeAttribute, type);

            newRequest.setAttribute(urlAttribute, name);

            QNetworkReply *reply = manager->get(newRequest);

            connect(reply, SIGNAL(finished()), this, SLOT(resourceDownloaded()));

        }

    }

    return QVariant();

}

void DataBrowser::resourceDownloaded()

{

    QNetworkReply * reply = qobject_cast<QNetworkReply *>(sender());

    if(reply)

    {

        int type = reply->request().attribute(typeAttribute).toInt();

        QUrl url = reply->request().attribute(urlAttribute).toUrl();

        resources.insert(url.toString(), reply->readAll());

        document()->addResource(type, reply->request().url(), QVariant());

        update();

    }

}