/* This file is part of the KDE project
   Copyright (C) 2013 - 2014 Yue Liu <yue.liu@mail.com>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/

#ifndef KOFILEDIALOG_H
#define KOFILEDIALOG_H

#include "kowidgets_export.h"

#include <QFileDialog>
#include <QString>
#include <QUrl>
#include <QStringList>
#include <QList>


/**
 * Wrapper around QFileDialog providing native file dialogs
 * on KDE/Gnome/Windows/OSX/etc.
 */
class KOWIDGETS_EXPORT KoFileDialog : public QObject
{
    Q_OBJECT

public:
    enum DialogType {
        OpenFile,
        OpenFiles,
        OpenDirectory,
        ImportFile,
        ImportFiles,
        ImportDirectory,
        SaveFile
    };

    /**
     * @brief constructor
     * @param parent The parent of the file dialog
     * @param dialogType usage of the file dialog
     * @param dialogName the name for the file dialog. This will be used to open
     * the filedialog in the last open location, instead the specified directory.
     *
     * @return The name of the entry user selected in the file dialog
     *
     */
    KoFileDialog(QWidget *parent,
                 KoFileDialog::DialogType type,
                 const QString &dialogName);

    ~KoFileDialog();

    void setCaption(const QString &caption);

    /**
     * @brief setDefaultDir set the default directory to defaultDir
     *
     * @param defaultDir a path to a file or directory
     */
    void setDefaultDir(const QString &defaultDir, bool override = false);

    /**
     * @brief setOverrideDir override both the default dir and the saved dir found by dialogName
     * @param overrideDir a path to a file or directory
     */
    void setOverrideDir(const QString &overrideDir);

    /**
     * @brief setImageFilters sets the name filters for the file dialog to all
     * image formats Qt's QImageReader supports.
     */
    void setImageFilters();

    void setNameFilter(const QString &filter);

    /**
     * @brief setNameFilters set a list of description/extension pairs.
     *
     * These are not registered mimetypes. In contrast with Qt's filedialog namefilters,
     * you can only have _one_ pair per line. I.e.
     *
     * Gif Image (*gif)
     * Tiff Image (*tif)
     *
     * And NOT Images (*gif *tif)
     *
     * @param filterList
     * @param defaultFilter
     */
    void setNameFilters(const QStringList &filterList,
                        QString defaultFilter = QString());
    void setMimeTypeFilters(const QStringList &filterList,
                            QString defaultFilter = QString());
    void setHideNameFilterDetailsOption();

    QStringList nameFilters() const;

    QStringList urls();
    QString url();

    /**
     * @brief selectedNameFilter returns the name filter the user selected, either
     *    directory or by clicking on it.
     * @return
     */
    QString selectedNameFilter() const;

    QString selectedMimeType() const;

private Q_SLOTS:

    void filterSelected(const QString &filter);

private:
    /**
     * @brief splitNameFilter take a single line of a QDialog name filter and split it
     *   into several lines. This is needed because a single line name filter can contain
     *   more than one mimetype, making it impossible to figure out the correct extension.
     *
     *   The methods takes care of some duplicated extensions, like jpeg and jpg.
     * @param nameFilter the namefilter to be split
     * @param mimeList a pointer to the list with mimes that shouldn't be added.
     * @return a stringlist of all name filters.
     */
    static QStringList splitNameFilter(const QString &nameFilter, QStringList *mimeList);

    void createFileDialog();

    QString getUsedDir(const QString &dialogName);
    void saveUsedDir(const QString &fileName, const QString &dialogName);

    const QStringList getFilterStringListFromMime(const QStringList &mimeList,
                                                  bool withAllSupportedEntry = false);



    class Private;
    Private * const d;
};

#endif /* KOFILEDIALOG_H */