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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 "content/public/browser/file_select_listener.h"

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

namespace QtWebEngineCore {

FilePickerController::FilePickerController(FileChooserMode mode, std::unique_ptr<content::FileSelectListener> listener, const QString &defaultFileName, const QStringList &acceptedMimeTypes, QObject *parent)
    : QObject(parent)
    , m_defaultFileName(defaultFileName)
    , m_acceptedMimeTypes(acceptedMimeTypes)
    , m_listener(std::move(listener))
    , m_mode(mode)
{
}

FilePickerController::~FilePickerController() = default;

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

    for (const QString &file : files) {
        if (QDir(file).isAbsolute())
            stringList.append(file);
        else
            qWarning("Ignore invalid item in FilePickerController::accepted(QStringList): %s", qPrintable(file));
    }

    FilePickerController::filesSelectedInChooser(stringList);
}

void FilePickerController::accepted(const QVariant &files)
{
    QStringList stringList;
    QList<QUrl> urlList = QUrl::fromStringList(files.toStringList());

    if (urlList.isEmpty()) {
        FilePickerController::accepted(stringList);
    } else {
        for (const QUrl &url : qAsConst(urlList)) {
            if (url.isValid() && url.scheme() == "file" && !url.path().isEmpty())
                stringList.append(url.path());
            else
                qWarning("Ignore invalid item in FilePickerController::accepted(QVariant): %s", qPrintable(url.toString()));
        }

        FilePickerController::accepted(stringList);
    }
}

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

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, blink::mojom::FileChooserParams_Mode::kOpen)
ASSERT_ENUMS_MATCH(FilePickerController::OpenMultiple, blink::mojom::FileChooserParams_Mode::kOpenMultiple)
ASSERT_ENUMS_MATCH(FilePickerController::UploadFolder, blink::mojom::FileChooserParams_Mode::kUploadFolder)
ASSERT_ENUMS_MATCH(FilePickerController::Save, blink::mojom::FileChooserParams_Mode::kSave)

void FilePickerController::filesSelectedInChooser(const QStringList &filesList)
{
    QStringList files(filesList);
    if (this->m_mode == UploadFolder && !filesList.isEmpty()
            && QFileInfo(filesList.first()).isDir()) // Enumerate the directory
        files = listRecursively(QDir(filesList.first()));

    std::vector<blink::mojom::FileChooserFileInfoPtr> chooser_files;
    for (const auto &file : qAsConst(files)) {
        chooser_files.push_back(blink::mojom::FileChooserFileInfo::NewNativeFile(
            blink::mojom::NativeFileInfo::New(toFilePath(file), base::string16())));
    }

    if (files.isEmpty())
        m_listener->FileSelectionCanceled();
    else
        m_listener->FileSelected(std::move(chooser_files),
                                  /* FIXME? */ base::FilePath(),
                                 static_cast<blink::mojom::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