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#include "kdupdaterfiledownloaderfactory.h"
#include "kdupdaterfiledownloader_p.h"

#include <QtNetwork/QSslSocket>

/*!
   \internal
   \ingroup kdupdater
   \class KDUpdater::FileDownloaderFactory kdupdaterfiledownloaderfactory.h
   \brief Factory for \ref KDUpdater::FileDownloader

   This class acts as a factory for \ref KDUpdater::FileDownloader. You can register
   one or more file downloaders with this factory and query them based on their scheme.

   This class follows the singleton design pattern. Only one instance of this class can
   be created and its reference can be fetched from the \ref instance() method.
*/

using namespace KDUpdater;

struct FileDownloaderFactory::FileDownloaderFactoryData
{
    FileDownloaderFactoryData() : m_factory(0) {}
    ~FileDownloaderFactoryData() { delete m_factory; }

    bool m_followRedirects;
    bool m_ignoreSslErrors;
    FileDownloaderProxyFactory *m_factory;
};

FileDownloaderFactory& FileDownloaderFactory::instance()
{
    static KDUpdater::FileDownloaderFactory theFactory;
    return theFactory;
}

/*!
   Constructor
*/
FileDownloaderFactory::FileDownloaderFactory()
    : d (new FileDownloaderFactoryData)
{
    // Register the default file downloader set
    registerFileDownloader<LocalFileDownloader>( QLatin1String("file"));
    registerFileDownloader<HttpDownloader>(QLatin1String("ftp"));
    registerFileDownloader<HttpDownloader>(QLatin1String("http"));
    registerFileDownloader<ResourceFileDownloader >(QLatin1String("resource"));

#ifndef QT_NO_OPENSSL
    // TODO: once we switch to Qt5, use QT_NO_SSL instead of QT_NO_OPENSSL
    if (QSslSocket::supportsSsl())
        registerFileDownloader<HttpDownloader>(QLatin1String("https"));
    else
        qWarning() << "Could not register file downloader for https protocol: QSslSocket::supportsSsl() returns false";
#endif

    d->m_followRedirects = false;
}

bool FileDownloaderFactory::followRedirects()
{
    return FileDownloaderFactory::instance().d->m_followRedirects;
}

void FileDownloaderFactory::setFollowRedirects(bool val)
{
    FileDownloaderFactory::instance().d->m_followRedirects = val;
}

void FileDownloaderFactory::setProxyFactory(FileDownloaderProxyFactory *factory)
{
    delete FileDownloaderFactory::instance().d->m_factory;
    FileDownloaderFactory::instance().d->m_factory = factory;
}

bool FileDownloaderFactory::ignoreSslErrors()
{
    return FileDownloaderFactory::instance().d->m_ignoreSslErrors;
}

void FileDownloaderFactory::setIgnoreSslErrors(bool ignore)
{
    FileDownloaderFactory::instance().d->m_ignoreSslErrors = ignore;
}

FileDownloaderFactory::~FileDownloaderFactory()
{
    delete d;
}

/*!
   Returns a new instance to the \ref KDUpdater::FileDownloader based whose scheme is equal to the string
   passed as parameter to this function.
   \note Ownership of this object remains to the programmer.
*/
FileDownloader *FileDownloaderFactory::create(const QString &scheme, QObject *parent) const
{
    FileDownloader *downloader = KDGenericFactory<FileDownloader>::create(scheme);
    if (downloader != 0) {
        downloader->setParent(parent);
        downloader->setScheme(scheme);
        downloader->setFollowRedirects(d->m_followRedirects);
        downloader->setIgnoreSslErrors(d->m_ignoreSslErrors);
        if (d->m_factory)
            downloader->setProxyFactory(d->m_factory->clone());
    }
    return downloader;
}

/*!
   KDUpdater::FileDownloaderFactory::registerFileDownlooader
   Registers a new file downloader with the factory. If there is already a downloader with the same scheme,
   the downloader is replaced. The ownership of the downloader is transferred to the factory.
*/