/*
* This program source code file is part of KICAD, a free EDA CAD application.
*
* Copyright (C) 2016-2020 Kicad Developers, see change_log.txt for contributors.
*
* 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
*/

#include <gal/gal_display_options.h>
#include <settings/app_settings.h>
#include <settings/common_settings.h>

#include <wx/log.h>

#include <config_map.h>
#include <gal/dpi_scaling.h>

using namespace KIGFX;

static const UTIL::CFG_MAP<KIGFX::GRID_STYLE> gridStyleConfigVals =
{
    { KIGFX::GRID_STYLE::DOTS,       0 },
    { KIGFX::GRID_STYLE::LINES,      1 },
    { KIGFX::GRID_STYLE::SMALL_CROSS,2 },
};

static const UTIL::CFG_MAP<KIGFX::GRID_SNAPPING> gridSnapConfigVals =
{
    { KIGFX::GRID_SNAPPING::ALWAYS,     0 },
    { KIGFX::GRID_SNAPPING::WITH_GRID,  1 },
    { KIGFX::GRID_SNAPPING::NEVER,      2 }
};


/**
 * Flag to enable GAL_DISPLAY_OPTIONS logging
 *
 * Use "KICAD_GAL_DISPLAY_OPTIONS" to enable.
 *
 * @ingroup trace_env_vars
 */
static const wxChar* traceGalDispOpts = wxT( "KICAD_GAL_DISPLAY_OPTIONS" );


GAL_DISPLAY_OPTIONS::GAL_DISPLAY_OPTIONS()
    : gl_antialiasing_mode( OPENGL_ANTIALIASING_MODE::NONE ),
      cairo_antialiasing_mode( CAIRO_ANTIALIASING_MODE::NONE ),
      m_dpi( nullptr, nullptr ),
      m_gridStyle( GRID_STYLE::DOTS ),
      m_gridSnapping( GRID_SNAPPING::ALWAYS ),
      m_gridLineWidth( 1.0 ),
      m_gridMinSpacing( 10.0 ),
      m_axesEnabled( false ),
      m_fullscreenCursor( false ),
      m_forceDisplayCursor( false ),
      m_scaleFactor( DPI_SCALING::GetDefaultScaleFactor() )
{}


void GAL_DISPLAY_OPTIONS::ReadWindowSettings( WINDOW_SETTINGS& aCfg )
{
    wxLogTrace( traceGalDispOpts, "Reading app-specific options" );

    m_gridStyle = UTIL::GetValFromConfig( gridStyleConfigVals, aCfg.grid.style );
    m_gridSnapping = UTIL::GetValFromConfig( gridSnapConfigVals, aCfg.grid.snap );
    m_gridLineWidth = aCfg.grid.line_width;
    m_gridMinSpacing = aCfg.grid.min_spacing;
    m_axesEnabled = aCfg.grid.axes_enabled;

    m_fullscreenCursor = aCfg.cursor.fullscreen_cursor;
    m_forceDisplayCursor = aCfg.cursor.always_show_cursor;

    NotifyChanged();
}


void GAL_DISPLAY_OPTIONS::ReadCommonConfig( COMMON_SETTINGS& aSettings, wxWindow* aWindow )
{
    wxLogTrace( traceGalDispOpts, "Reading common config" );

    gl_antialiasing_mode = static_cast<KIGFX::OPENGL_ANTIALIASING_MODE>(
            aSettings.m_Graphics.opengl_aa_mode );

    cairo_antialiasing_mode = static_cast<KIGFX::CAIRO_ANTIALIASING_MODE>(
            aSettings.m_Graphics.cairo_aa_mode );

    m_dpi = DPI_SCALING( &aSettings, aWindow );

    // Also calls NotifyChanged
    UpdateScaleFactor();
}


void GAL_DISPLAY_OPTIONS::ReadConfig( COMMON_SETTINGS& aCommonConfig,
                                      WINDOW_SETTINGS& aWindowConfig, wxWindow* aWindow )
{
    wxLogTrace( traceGalDispOpts, "Reading common and app config" );

    ReadWindowSettings( aWindowConfig );

    ReadCommonConfig( aCommonConfig, aWindow );
}


void GAL_DISPLAY_OPTIONS::WriteConfig( WINDOW_SETTINGS& aCfg )
{
    wxLogTrace( traceGalDispOpts, "Writing window settings" );

    aCfg.grid.style = UTIL::GetConfigForVal( gridStyleConfigVals, m_gridStyle );
    aCfg.grid.snap = UTIL::GetConfigForVal( gridSnapConfigVals, m_gridSnapping );
    aCfg.grid.line_width = m_gridLineWidth;
    aCfg.grid.min_spacing = m_gridMinSpacing;
    aCfg.grid.axes_enabled = m_axesEnabled;
    aCfg.cursor.fullscreen_cursor = m_fullscreenCursor;
    aCfg.cursor.always_show_cursor = m_forceDisplayCursor;
}


void GAL_DISPLAY_OPTIONS::UpdateScaleFactor()
{
    if( m_scaleFactor != m_dpi.GetScaleFactor() )
    {
        m_scaleFactor = m_dpi.GetScaleFactor();
        NotifyChanged();
    }
}


void GAL_DISPLAY_OPTIONS::NotifyChanged()
{
    wxLogTrace( traceGalDispOpts, "Change notification" );

    Notify( &GAL_DISPLAY_OPTIONS_OBSERVER::OnGalDisplayOptionsChanged, *this );
}