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#include "qfsfileengine_iterator_p.h"

#include "qfsfileengine_p.h"

#include "qplatformdefs.h"

#include <QtCore/qvariant.h>

QT_BEGIN_NAMESPACE

class QFSFileEngineIteratorPlatformSpecificData

{

public:

    inline QFSFileEngineIteratorPlatformSpecificData()

        : uncShareIndex(-1), findFileHandle(INVALID_HANDLE_VALUE),

          done(false), uncFallback(false)

    {}

    QFSFileEngineIterator *it;

    QStringList uncShares;

    int uncShareIndex;

    HANDLE findFileHandle;

    WIN32_FIND_DATA findData;

    bool done;

    bool uncFallback;

    void saveCurrentFileName();

};

void QFSFileEngineIteratorPlatformSpecificData::saveCurrentFileName()

{

    if (uncFallback) {

        // Windows share / UNC path

        it->currentEntry = uncShares.at(uncShareIndex - 1);

    } else {

        // Local directory

        it->currentEntry = QString::fromWCharArray(findData.cFileName);

    }

}

void QFSFileEngineIterator::advance()

{

    platform->saveCurrentFileName();

    if (platform->done)

        return;

    if (platform->uncFallback) {

        ++platform->uncShareIndex;

    } else if (platform->findFileHandle != INVALID_HANDLE_VALUE) {

        if (!FindNextFile(platform->findFileHandle, &platform->findData)) {

            platform->done = true;

            FindClose(platform->findFileHandle);

        }

    }

}

void QFSFileEngineIterator::newPlatformSpecifics()

{

    platform = new QFSFileEngineIteratorPlatformSpecificData;

    platform->it = this;

}

void QFSFileEngineIterator::deletePlatformSpecifics()

{

    delete platform;

    platform = 0;

}

bool QFSFileEngineIterator::hasNext() const

{

    if (platform->done)

        return false;

    if (platform->uncFallback)

        return platform->uncShareIndex > 0 && platform->uncShareIndex <= platform->uncShares.size();

    if (platform->findFileHandle == INVALID_HANDLE_VALUE) {

        QString path = this->path();

        // Local directory

        if (path.endsWith(QLatin1String(".lnk")))

            path = QFileInfo(path).readLink();

        if (!path.endsWith(QLatin1Char('/')))

            path.append(QLatin1Char('/'));

        path.append(QLatin1String("*.*"));

        QString fileName = QFSFileEnginePrivate::longFileName(path);

        platform->findFileHandle = FindFirstFile((const wchar_t *)fileName.utf16(), &platform->findData);

        if (platform->findFileHandle == INVALID_HANDLE_VALUE) {

            if (path.startsWith(QLatin1String("//"))) {

                path = this->path();

                // UNC

                QStringList parts = QDir::toNativeSeparators(path).split(QLatin1Char('\\'), QString::SkipEmptyParts);

                if (parts.count() == 1 && QFSFileEnginePrivate::uncListSharesOnServer(QLatin1String("\\\\") + parts.at(0),

                                                                                      &platform->uncShares)) {

                    if (platform->uncShares.isEmpty()) {

                        platform->done = true;

                    } else {

                        platform->uncShareIndex = 1;

                    }

                    platform->uncFallback = true;

                } else {

                    platform->done = true;

                }

            } else {

                platform->done = true;

            }

        }

        if (!platform->done && (!platform->uncFallback || !platform->uncShares.isEmpty()))

            platform->saveCurrentFileName();

    }

    return !platform->done;

}

QT_END_NAMESPACE