/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2017 CERN
 * Author: Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
*
 * 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 2
 * 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, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#ifndef __PROGRESS_REPORTER
#define __PROGRESS_REPORTER

#include <mutex>
#include <atomic>

#include <wx/progdlg.h>

class PROGRESS_REPORTER
{
    public:

        PROGRESS_REPORTER( int aNumPhases );
        PROGRESS_REPORTER( const PROGRESS_REPORTER& ) = delete;

        /**
         * initialize the aPhase virtual zone of the dialog progress bar
         */
        void BeginPhase( int aPhase );

        /**
         * Uses the next vailable virtual zone of the dialog progress bar
         */
        void AdvancePhase( );

        /**
         * Display aMessage in the progress bar dialog
         */
        void Report ( const wxString& aMessage );

        /**
         * Fix the value thar gives the 100 precent progress bar length
         * (inside the current virtual zone)
         */
        void SetMaxProgress ( int aMaxProgress );

        /**
         * Increment the progress bar length (inside the current virtual zone)
         */
        void AdvanceProgress( );

        /**
         * Update the UI dialog.
         * This function is compatible with OPENMP use.
         */
        void KeepRefreshing( bool aWait = false );

    protected:

        int currentProgress() const;
        virtual void updateUI() = 0;

        wxString m_rptMessage;
        int m_phase;
        int m_numPhases;
        std::atomic_int m_progress;
        int m_maxProgress;
};

/**
 * This class implements a wxProgressDialog that can be used in a OPENMP environment
 * (i.e. the progress bar update can be called from different theads).
 * It is mainly used in Zone fill calculations
 */
class WX_PROGRESS_REPORTER : public PROGRESS_REPORTER, public wxProgressDialog
{
public:
    /**
     * Ctor: the PROGRESS_REPORTER will stay on top of aParent.
     * the style is wxPD_AUTO_HIDE | wxPD_CAN_ABORT | wxPD_ELAPSED_TIME
     * @param aParent is the wxDialog of Frame that manage this.
     * @param aTitle is the dialog progress title
     * @param aNumPhases is the number of "virtual sections" of the progress bar
     * aNumPhases = 1 is the usual progress bar
     * aNumPhases = n creates n virtual progress bar zones: a 0 to 100 percent width
     * of a virtual zone fills 0 to 1/n progress bar full size of the nth virtual zone index
     */
    WX_PROGRESS_REPORTER( wxWindow *aParent, const wxString &aTitle, int aNumPhases );
    ~WX_PROGRESS_REPORTER();

private:

    virtual void updateUI() override;
};

#endif