// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QFILEDIALOG_H
#define QFILEDIALOG_H

#include <QtWidgets/qtwidgetsglobal.h>
#include <QtCore/qdir.h>
#include <QtCore/qstring.h>
#include <QtCore/qurl.h>
#include <QtWidgets/qdialog.h>

#include <functional>

QT_REQUIRE_CONFIG(filedialog);

QT_BEGIN_NAMESPACE

class QModelIndex;
class QItemSelection;
struct QFileDialogArgs;
class QFileDialogPrivate;
class QAbstractFileIconProvider;
class QAbstractItemDelegate;
class QAbstractProxyModel;

class Q_WIDGETS_EXPORT QFileDialog : public QDialog
{
    Q_OBJECT
    Q_PROPERTY(ViewMode viewMode READ viewMode WRITE setViewMode)
    Q_PROPERTY(FileMode fileMode READ fileMode WRITE setFileMode)
    Q_PROPERTY(AcceptMode acceptMode READ acceptMode WRITE setAcceptMode)
    Q_PROPERTY(QString defaultSuffix READ defaultSuffix WRITE setDefaultSuffix)
    Q_PROPERTY(Options options READ options WRITE setOptions)
    Q_PROPERTY(QStringList supportedSchemes READ supportedSchemes WRITE setSupportedSchemes)

public:
    enum ViewMode { Detail, List };
    Q_ENUM(ViewMode)
    enum FileMode { AnyFile, ExistingFile, Directory, ExistingFiles };
    Q_ENUM(FileMode)
    enum AcceptMode { AcceptOpen, AcceptSave };
    Q_ENUM(AcceptMode)
    enum DialogLabel { LookIn, FileName, FileType, Accept, Reject };

    // keep this in sync with QFileDialogOption::FileDialogOptions
    enum Option
    {
        ShowDirsOnly                = 0x00000001,
        DontResolveSymlinks         = 0x00000002,
        DontConfirmOverwrite        = 0x00000004,
        DontUseNativeDialog         = 0x00000008,
        ReadOnly                    = 0x00000010,
        HideNameFilterDetails       = 0x00000020,
        DontUseCustomDirectoryIcons = 0x00000040
    };
    Q_ENUM(Option)
    Q_DECLARE_FLAGS(Options, Option)
    Q_FLAG(Options)

    QFileDialog(QWidget *parent, Qt::WindowFlags f);
    explicit QFileDialog(QWidget *parent = nullptr,
                         const QString &caption = QString(),
                         const QString &directory = QString(),
                         const QString &filter = QString());
    ~QFileDialog();

    void setDirectory(const QString &directory);
    inline void setDirectory(const QDir &directory);
    QDir directory() const;

    void setDirectoryUrl(const QUrl &directory);
    QUrl directoryUrl() const;

    void selectFile(const QString &filename);
    QStringList selectedFiles() const;

    void selectUrl(const QUrl &url);
    QList<QUrl> selectedUrls() const;

    void setNameFilter(const QString &filter);
    void setNameFilters(const QStringList &filters);
    QStringList nameFilters() const;
    void selectNameFilter(const QString &filter);
    QString selectedMimeTypeFilter() const;
    QString selectedNameFilter() const;

#if QT_CONFIG(mimetype)
    void setMimeTypeFilters(const QStringList &filters);
    QStringList mimeTypeFilters() const;
    void selectMimeTypeFilter(const QString &filter);
#endif

    QDir::Filters filter() const;
    void setFilter(QDir::Filters filters);

    void setViewMode(ViewMode mode);
    ViewMode viewMode() const;

    void setFileMode(FileMode mode);
    FileMode fileMode() const;

    void setAcceptMode(AcceptMode mode);
    AcceptMode acceptMode() const;

    void setSidebarUrls(const QList<QUrl> &urls);
    QList<QUrl> sidebarUrls() const;

    QByteArray saveState() const;
    bool restoreState(const QByteArray &state);

    void setDefaultSuffix(const QString &suffix);
    QString defaultSuffix() const;

    void setHistory(const QStringList &paths);
    QStringList history() const;

    void setItemDelegate(QAbstractItemDelegate *delegate);
    QAbstractItemDelegate *itemDelegate() const;

    void setIconProvider(QAbstractFileIconProvider *provider);
    QAbstractFileIconProvider *iconProvider() const;

    void setLabelText(DialogLabel label, const QString &text);
    QString labelText(DialogLabel label) const;

    void setSupportedSchemes(const QStringList &schemes);
    QStringList supportedSchemes() const;

#if QT_CONFIG(proxymodel)
    void setProxyModel(QAbstractProxyModel *model);
    QAbstractProxyModel *proxyModel() const;
#endif

    void setOption(Option option, bool on = true);
    bool testOption(Option option) const;
    void setOptions(Options options);
    Options options() const;

    using QDialog::open;
    void open(QObject *receiver, const char *member);
    void setVisible(bool visible) override;

Q_SIGNALS:
    void fileSelected(const QString &file);
    void filesSelected(const QStringList &files);
    void currentChanged(const QString &path);
    void directoryEntered(const QString &directory);

    void urlSelected(const QUrl &url);
    void urlsSelected(const QList<QUrl> &urls);
    void currentUrlChanged(const QUrl &url);
    void directoryUrlEntered(const QUrl &directory);

    void filterSelected(const QString &filter);

public:

    static QString getOpenFileName(QWidget *parent = nullptr,
                                   const QString &caption = QString(),
                                   const QString &dir = QString(),
                                   const QString &filter = QString(),
                                   QString *selectedFilter = nullptr,
                                   Options options = Options());

    static QUrl getOpenFileUrl(QWidget *parent = nullptr,
                               const QString &caption = QString(),
                               const QUrl &dir = QUrl(),
                               const QString &filter = QString(),
                               QString *selectedFilter = nullptr,
                               Options options = Options(),
                               const QStringList &supportedSchemes = QStringList());

    static QString getSaveFileName(QWidget *parent = nullptr,
                                   const QString &caption = QString(),
                                   const QString &dir = QString(),
                                   const QString &filter = QString(),
                                   QString *selectedFilter = nullptr,
                                   Options options = Options());

    static QUrl getSaveFileUrl(QWidget *parent = nullptr,
                               const QString &caption = QString(),
                               const QUrl &dir = QUrl(),
                               const QString &filter = QString(),
                               QString *selectedFilter = nullptr,
                               Options options = Options(),
                               const QStringList &supportedSchemes = QStringList());

    static QString getExistingDirectory(QWidget *parent = nullptr,
                                        const QString &caption = QString(),
                                        const QString &dir = QString(),
                                        Options options = ShowDirsOnly);

    static QUrl getExistingDirectoryUrl(QWidget *parent = nullptr,
                                        const QString &caption = QString(),
                                        const QUrl &dir = QUrl(),
                                        Options options = ShowDirsOnly,
                                        const QStringList &supportedSchemes = QStringList());

    static QStringList getOpenFileNames(QWidget *parent = nullptr,
                                        const QString &caption = QString(),
                                        const QString &dir = QString(),
                                        const QString &filter = QString(),
                                        QString *selectedFilter = nullptr,
                                        Options options = Options());

    static QList<QUrl> getOpenFileUrls(QWidget *parent = nullptr,
                                       const QString &caption = QString(),
                                       const QUrl &dir = QUrl(),
                                       const QString &filter = QString(),
                                       QString *selectedFilter = nullptr,
                                       Options options = Options(),
                                       const QStringList &supportedSchemes = QStringList());

    static void getOpenFileContent(const QString &nameFilter,
                                   const std::function<void(const QString &, const QByteArray &)> &fileContentsReady,
                                   QWidget *parent= nullptr);

    static void saveFileContent(const QByteArray &fileContent,
                                const QString &fileNameHint,
                                QWidget *parent = nullptr);

#if QT_WIDGETS_REMOVED_SINCE(6, 7)
    static void getOpenFileContent(const QString &nameFilter,
                                   const std::function<void(const QString &, const QByteArray &)> &fileContentsReady);
    static void saveFileContent(const QByteArray &fileContent,
                                const QString &fileNameHint = QString());
#endif


protected:
    QFileDialog(const QFileDialogArgs &args);
    void done(int result) override;
    void accept() override;
    void changeEvent(QEvent *e) override;

private:
    Q_DECLARE_PRIVATE(QFileDialog)
    Q_DISABLE_COPY(QFileDialog)

    friend class QPlatformDialogHelper;
};

inline void QFileDialog::setDirectory(const QDir &adirectory)
{ setDirectory(adirectory.absolutePath()); }

Q_DECLARE_OPERATORS_FOR_FLAGS(QFileDialog::Options)

QT_END_NAMESPACE

#endif // QFILEDIALOG_H