/*
    SPDX-FileCopyrightText: 2008 Ingo Klöcker <kloecker@kde.org>
    SPDX-FileCopyrightText: 2010-2023 Laurent Montel <montel@kde.org>

    SPDX-License-Identifier: LGPL-2.0-or-later
*/

#pragma once

#include "akonadiwidgets_export.h"
// AkonadiCore
#include <akonadi/collection.h>

#include <QAbstractItemView>
#include <QDialog>

#include <memory>

namespace Akonadi
{
class CollectionDialogPrivate;

/**
 * @short A collection selection dialog.
 *
 * Provides a dialog that lists collections that are available
 * on the Akonadi storage and allows the selection of one or multiple
 * collections.
 *
 * The list of shown collections can be filtered by mime type and access
 * rights. Note that mime types are not enabled by default, so
 * setMimeTypeFilter() must be called to enable the desired mime types.
 *
 * Example:
 *
 * @code
 *
 * using namespace Akonadi;
 *
 * // Show the user a dialog to select a writable collection of contacts
 * CollectionDialog dlg( this );
 * dlg.setMimeTypeFilter( QStringList() << KContacts::Addressee::mimeType() );
 * dlg.setAccessRightsFilter( Collection::CanCreateItem );
 * dlg.setDescription( i18n( "Select an address book for saving:" ) );
 *
 * if ( dlg.exec() ) {
 *   const Collection collection = dlg.selectedCollection();
 *   ...
 * }
 *
 * @endcode
 *
 * @author Ingo Klöcker <kloecker@kde.org>
 * @since 4.3
 */
class AKONADIWIDGETS_EXPORT CollectionDialog : public QDialog
{
    Q_OBJECT
    Q_DISABLE_COPY(CollectionDialog)

public:
    /* @since 4.6
     */
    enum CollectionDialogOption {
        None = 0,
        AllowToCreateNewChildCollection = 1,
        KeepTreeExpanded = 2,
    };

    Q_DECLARE_FLAGS(CollectionDialogOptions, CollectionDialogOption)

    /**
     * Creates a new collection dialog.
     *
     * @param parent The parent widget.
     */
    explicit CollectionDialog(QWidget *parent = nullptr);

    /**
     * Creates a new collection dialog with a custom @p model.
     *
     * The filtering by content mime type and access rights is done
     * on top of the custom model.
     *
     * @param model The custom model to use.
     * @param parent The parent widget.
     *
     * @since 4.4
     */
    explicit CollectionDialog(QAbstractItemModel *model, QWidget *parent = nullptr);

    /**
     * Creates a new collection dialog with a custom @p model.
     *
     * The filtering by content mime type and access rights is done
     * on top of the custom model.
     *
     * @param options The collection dialog options.
     * @param model The custom model to use.
     * @param parent The parent widget.
     *
     * @since 4.6
     */

    explicit CollectionDialog(CollectionDialogOptions options, QAbstractItemModel *model = nullptr, QWidget *parent = nullptr);

    /**
     * Destroys the collection dialog.
     */
    ~CollectionDialog() override;

    /**
     * Sets the mime types any of which the selected collection(s) shall support.
     * Note that mime types are not enabled by default.
     * @param mimeTypes MIME type filter values
     */
    void setMimeTypeFilter(const QStringList &mimeTypes);

    /**
     * Returns the mime types any of which the selected collection(s) shall support.
     */
    Q_REQUIRED_RESULT QStringList mimeTypeFilter() const;

    /**
     * Sets the access @p rights that the listed collections shall match with.
     * @param rights access rights filter values
     * @since 4.4
     */
    void setAccessRightsFilter(Collection::Rights rights);

    /**
     * Sets the access @p rights that the listed collections shall match with.
     *
     * @since 4.4
     */
    Q_REQUIRED_RESULT Collection::Rights accessRightsFilter() const;

    /**
     * Sets the @p text that will be shown in the dialog.
     * @param text the dialog's description text
     * @since 4.4
     */
    void setDescription(const QString &text);

    /**
     * Sets the @p collection that shall be selected by default.
     * @param collection the dialog's pre-selected collection
     * @since 4.4
     */
    void setDefaultCollection(const Collection &collection);

    /**
     * Sets the selection mode. The initial default mode is
     * QAbstractItemView::SingleSelection.
     * @param mode the selection mode to use
     * @see QAbstractItemView::setSelectionMode()
     */
    void setSelectionMode(QAbstractItemView::SelectionMode mode);

    /**
     * Returns the selection mode.
     * @see QAbstractItemView::selectionMode()
     */
    Q_REQUIRED_RESULT QAbstractItemView::SelectionMode selectionMode() const;

    /**
     * Returns the selected collection if the selection mode is
     * QAbstractItemView::SingleSelection. If another selection mode was set,
     * or nothing is selected, an invalid collection is returned.
     */
    Q_REQUIRED_RESULT Akonadi::Collection selectedCollection() const;

    /**
     * Returns the list of selected collections.
     */
    Q_REQUIRED_RESULT Akonadi::Collection::List selectedCollections() const;

    /**
     * Change collection dialog options.
     * @param options the collection dialog options to change
     * @since 4.6
     */
    void changeCollectionDialogOptions(CollectionDialogOptions options);

    /**
     * @since 4.13
     */
    void setUseFolderByDefault(bool b);
    /**
     * @since 4.13
     */
    Q_REQUIRED_RESULT bool useFolderByDefault() const;
    /**
     * Allow to specify collection content mimetype when we create new one.
     * @since 4.14.6
     */
    void setContentMimeTypes(const QStringList &mimetypes);

private:
    /// @cond PRIVATE
    std::unique_ptr<CollectionDialogPrivate> const d;
    /// @endcond
};

} // namespace Akonadi
