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#include "file_picker_controller.h"
#include "type_conversion.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
#include "content/browser/web_contents/web_contents_impl.h"

#include <QFileInfo>
#include <QDir>
#include <QVariant>
#include <QStringList>

namespace QtWebEngineCore {

FilePickerController::FilePickerController(FileChooserMode mode, content::RenderFrameHost *frameHost, const QString &defaultFileName, const QStringList &acceptedMimeTypes, QObject *parent)
    : QObject(parent)
    , m_defaultFileName(defaultFileName)
    , m_acceptedMimeTypes(acceptedMimeTypes)
    , m_frameHost(frameHost)
    , m_mode(mode)
{
}

void FilePickerController::accepted(const QStringList &files)
{
    FilePickerController::filesSelectedInChooser(files, m_frameHost);
}

void FilePickerController::accepted(const QVariant &files)
{
    QStringList stringList;

    if (files.canConvert(QVariant::StringList)) {
        stringList = files.toStringList();
    } else if (files.canConvert<QList<QUrl> >()) {
        const QList<QUrl> urls = files.value<QList<QUrl>>();
        for (const QUrl &url : urls)
            stringList.append(url.toLocalFile());
    } else {
        qWarning("An unhandled type '%s' was provided in FilePickerController::accepted(QVariant)", files.typeName());
    }

    FilePickerController::filesSelectedInChooser(stringList, m_frameHost);
}

void FilePickerController::rejected()
{
    FilePickerController::filesSelectedInChooser(QStringList(), m_frameHost);
}

static QStringList listRecursively(const QDir &dir)
{
    QStringList ret;
    const QFileInfoList infoList(dir.entryInfoList(QDir::Dirs | QDir::Files | QDir::NoDotAndDotDot | QDir::Hidden));
    for (const QFileInfo &fileInfo : infoList) {
        if (fileInfo.isDir()) {
            ret.append(fileInfo.absolutePath() + QStringLiteral("/.")); // Match chromium's behavior. See chrome/browser/file_select_helper.cc
            ret.append(listRecursively(QDir(fileInfo.absoluteFilePath())));
        } else
            ret.append(fileInfo.absoluteFilePath());
    }
    return ret;
}

ASSERT_ENUMS_MATCH(FilePickerController::Open, content::FileChooserParams::Open)
ASSERT_ENUMS_MATCH(FilePickerController::OpenMultiple, content::FileChooserParams::OpenMultiple)
ASSERT_ENUMS_MATCH(FilePickerController::UploadFolder, content::FileChooserParams::UploadFolder)
ASSERT_ENUMS_MATCH(FilePickerController::Save, content::FileChooserParams::Save)

void FilePickerController::filesSelectedInChooser(const QStringList &filesList, content::RenderFrameHost *frameHost)
{
    Q_ASSERT(frameHost);
    QStringList files(filesList);
    if (this->m_mode == UploadFolder && !filesList.isEmpty()
            && QFileInfo(filesList.first()).isDir()) // Enumerate the directory
        files = listRecursively(QDir(filesList.first()));
    frameHost->FilesSelectedInChooser(toVector<content::FileChooserFileInfo>(files), static_cast<content::FileChooserParams::Mode>(this->m_mode));
}

QStringList FilePickerController::acceptedMimeTypes() const
{
    return m_acceptedMimeTypes;
}

FilePickerController::FileChooserMode FilePickerController::mode() const
{
    return m_mode;
}

QString FilePickerController::defaultFileName() const
{
    return m_defaultFileName;
}

} // namespace