/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2018 KiCad Developers, see AUTHORS.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 <view/wx_view_controls.h>
#include <worksheet_viewitem.h>

#include <gal/graphics_abstraction_layer.h>

#include <sch_preview_panel.h>
#include <sch_view.h>
#include <sch_painter.h>
#include <sch_edit_frame.h>
#include <preview_items/selection_area.h>

#include <functional>

#include <sch_sheet.h>
#include <pgm_base.h>

using namespace std::placeholders;

// define our user unit value for GAL ( given in GAL unit = 2.54/(IU per meter))
// TODO: move in a header common to sch_draw_panel.cpp
#define IU_2_GAL_WORLD_UNIT 2.54/(IU_PER_MM*1000)

SCH_PREVIEW_PANEL::SCH_PREVIEW_PANEL( wxWindow* aParentWindow, wxWindowID aWindowId,
                                      const wxPoint& aPosition, const wxSize& aSize,
                                      KIGFX::GAL_DISPLAY_OPTIONS& aOptions, GAL_TYPE aGalType ) :
    EDA_DRAW_PANEL_GAL( aParentWindow, aWindowId, aPosition, aSize, aOptions, aGalType ),
    m_parent( aParentWindow )
{
    m_view = new KIGFX::SCH_VIEW( true );
    m_view->SetGAL( m_gal );

    m_gal->SetWorldUnitLength( IU_2_GAL_WORLD_UNIT );

    m_painter.reset( new KIGFX::SCH_PAINTER( m_gal ) );

    m_view->SetPainter( m_painter.get() );
    m_view->SetScaleLimits( 20000.0, 0.002 );
    m_view->SetMirror( false, false );

    setDefaultLayerOrder();
    setDefaultLayerDeps();

    view()->UpdateAllLayersOrder();
    // View controls is the first in the event handler chain, so the Tool Framework operates
    // on updated viewport data.
    m_viewControls = new KIGFX::WX_VIEW_CONTROLS( m_view, this );

    m_gal->SetGridColor( GetLayerColor( LAYER_SCHEMATIC_GRID ) );
    m_gal->SetCursorColor( GetLayerColor( LAYER_SCHEMATIC_CURSOR ) );
    m_gal->SetGridSize( VECTOR2D( 50.0, 50.0 ) );

    m_viewControls->SetSnapping( true );

    SetEvtHandlerEnabled( true );
    SetFocus();
    Show( true );
    Raise();
    StartDrawing();
}


SCH_PREVIEW_PANEL::~SCH_PREVIEW_PANEL()
{
}


void SCH_PREVIEW_PANEL::OnShow()
{
    //m_view->RecacheAllItems();
}


void SCH_PREVIEW_PANEL::setDefaultLayerOrder()
{
    for( LAYER_NUM i = 0; (unsigned) i < sizeof( SCH_LAYER_ORDER ) / sizeof( LAYER_NUM ); ++i )
    {
        LAYER_NUM layer = SCH_LAYER_ORDER[i];
        wxASSERT( layer < KIGFX::VIEW::VIEW_MAX_LAYERS );

        m_view->SetLayerOrder( layer, i );
    }
}


void SCH_PREVIEW_PANEL::setDefaultLayerDeps()
{
    // An alias's fields don't know how to substitute in their parent's values, so we
    // don't let them draw themselves.  This means no caching.
    auto target = KIGFX::TARGET_NONCACHED;

    for( int i = 0; i < KIGFX::VIEW::VIEW_MAX_LAYERS; i++ )
        m_view->SetLayerTarget( i, target );

    m_view->SetLayerTarget( LAYER_GP_OVERLAY , KIGFX::TARGET_OVERLAY );
    m_view->SetLayerDisplayOnly( LAYER_GP_OVERLAY ) ;

    m_view->SetLayerTarget( LAYER_SELECT_OVERLAY , KIGFX::TARGET_OVERLAY );
    m_view->SetLayerDisplayOnly( LAYER_SELECT_OVERLAY ) ;

    m_view->SetLayerTarget( LAYER_WORKSHEET , KIGFX::TARGET_NONCACHED );
    m_view->SetLayerDisplayOnly( LAYER_WORKSHEET ) ;
}


KIGFX::SCH_VIEW* SCH_PREVIEW_PANEL::view() const
{
    return static_cast<KIGFX::SCH_VIEW*>( m_view );
}


void SCH_PREVIEW_PANEL::Refresh( bool aEraseBackground, const wxRect* aRect )
{
    EDA_DRAW_PANEL_GAL::Refresh( aEraseBackground, aRect );
}


void SCH_PREVIEW_PANEL::onPaint( wxPaintEvent& aEvent )
{
    if( m_painter )
        static_cast<KIGFX::SCH_PAINTER*>(m_painter.get())->GetSettings()->ImportLegacyColors( nullptr );

    if( IsShown() )
        EDA_DRAW_PANEL_GAL::onPaint( aEvent );
}