/*
    Scan Tailor - Interactive post-processing tool for scanned pages.
    Copyright (C)  Joseph Artsimovich <joseph.artsimovich@gmail.com>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef DESKEW_FILTER_H_
#define DESKEW_FILTER_H_

#include "NonCopyable.h"
#include "AbstractFilter.h"
#include "PageView.h"
#include "IntrusivePtr.h"
#include "FilterResult.h"
#include "SafeDeletingQObjectPtr.h"
#include "Settings.h"

class PageId;
class QString;
class PageSelectionAccessor;

namespace select_content
{
class Task;
class CacheDrivenTask;
}

namespace deskew
{

class OptionsWidget;
class Task;
class CacheDrivenTask;
class Settings;

class Filter : public AbstractFilter
{
    DECLARE_NON_COPYABLE(Filter)
public:
    Filter(PageSelectionAccessor const& page_selection_accessor);

    virtual ~Filter();

    virtual QString getName() const;

    virtual PageView getView() const;

    virtual void performRelinking(AbstractRelinker const& relinker);

    virtual void preUpdateUI(FilterUiInterface* ui, PageId const& page_id);

    virtual void updateStatistics()
    {
        m_ptrSettings->updateDeviation();
    }

    virtual int selectedPageOrder() const;

    virtual void selectPageOrder(int option);

    virtual std::vector<PageOrderOption> pageOrderOptions() const;

    virtual QDomElement saveSettings(
        ProjectWriter const& writer, QDomDocument& doc) const;

    virtual void loadSettings(
        ProjectReader const& reader, QDomElement const& filters_el);

    IntrusivePtr<Task> createTask(
        PageId const& page_id,
        IntrusivePtr<select_content::Task> const& next_task,
        bool batch_processing, bool debug);

    IntrusivePtr<CacheDrivenTask> createCacheDrivenTask(
        IntrusivePtr<select_content::CacheDrivenTask> const& next_task);

    OptionsWidget* optionsWidget()
    {
        return m_ptrOptionsWidget.get();
    }
    Settings* getSettings()
    {
        return m_ptrSettings.get();
    }
    void invalidateSetting(PageId const& page_id);
private:
    void writePageSettings(
        QDomDocument& doc, QDomElement& filter_el,
        PageId const& page_id, int numeric_id) const;

    IntrusivePtr<Settings> m_ptrSettings;
    SafeDeletingQObjectPtr<OptionsWidget> m_ptrOptionsWidget;
    std::vector<PageOrderOption> m_pageOrderOptions;
    int m_selectedPageOrder;
};

} // namespace deskew

#endif
