/*
 * 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 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/>.
 */

#include "pl_draw_panel_gal.h"
#include <view/view.h>
#include <tool/tool_manager.h>
#include <tools/pl_actions.h>
#include <view/wx_view_controls.h>
#include <ws_proxy_view_item.h>
#include <ws_data_model.h>
#include <ws_painter.h>
#include <pgm_base.h>
#include <kiway.h>
#include <pl_editor_frame.h>
#include <pl_editor_settings.h>
#include <settings/settings_manager.h>
#include <gal/graphics_abstraction_layer.h>

#include <functional>
#include <memory>
#include <tools/pl_selection_tool.h>

using namespace std::placeholders;


PL_DRAW_PANEL_GAL::PL_DRAW_PANEL_GAL( 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_view = new KIGFX::VIEW( true );
    m_view->SetGAL( m_gal );

    GetGAL()->SetWorldUnitLength( 1.0/IU_PER_MM /* 10 nm */ / 25.4 /* 1 inch in mm */ );

    m_painter = std::make_unique<KIGFX::WS_PAINTER>( m_gal );

    auto cfg = Pgm().GetSettingsManager().GetAppSettings<PL_EDITOR_SETTINGS>();
    m_painter->GetSettings()->LoadColors(
            Pgm().GetSettingsManager().GetColorSettings( cfg->m_ColorTheme ) );

    m_view->SetPainter( m_painter.get() );
    m_view->SetScaleLimits( 20.0, 0.05 );    // This fixes the zoom in and zoom out limits

    setDefaultLayerDeps();

    m_view->SetLayerVisible( LAYER_WORKSHEET, true );
    m_view->SetLayerVisible( LAYER_WORKSHEET_PAGE1, true );
    m_view->SetLayerVisible( LAYER_WORKSHEET_PAGEn, false );

    m_viewControls = new KIGFX::WX_VIEW_CONTROLS( m_view, this );
}


PL_DRAW_PANEL_GAL::~PL_DRAW_PANEL_GAL()
{
}


void PL_DRAW_PANEL_GAL::GetMsgPanelInfo( EDA_DRAW_FRAME* aFrame,
                                         std::vector<MSG_PANEL_ITEM>& aList )
{
}


void PL_DRAW_PANEL_GAL::DisplayWorksheet()
{
    PL_SELECTION_TOOL* selTool = m_edaFrame->GetToolManager()->GetTool<PL_SELECTION_TOOL>();
    WS_DATA_MODEL&     model = WS_DATA_MODEL::GetTheInstance();

    selTool->GetSelection().Clear();
    m_view->Clear();

    m_pageDrawItem.reset();

    // Obviously, always show the page limit:
    m_edaFrame->SetShowPageLimits( true );
    auto painter = m_view->GetPainter();
    auto settings = painter->GetSettings();
    settings->SetShowPageLimits( true );

    model.SetupDrawEnvironment( m_edaFrame->GetPageSettings(), Mils2iu( 1 ) );

    // To show the formatted texts instead of raw texts in page layout editor, we need
    // a dummy WS_DRAW_ITEM_LIST.
    WS_DRAW_ITEM_LIST dummy;
    dummy.SetPaperFormat( &m_edaFrame->GetPageSettings().GetType() );
    dummy.SetTitleBlock( &m_edaFrame->GetTitleBlock() );
    dummy.SetProject( &m_edaFrame->Prj() );

    for( WS_DATA_ITEM* dataItem : model.GetItems() )
        dataItem->SyncDrawItems( &dummy, m_view );

    // Build and add a WS_DRAW_ITEM_PAGE to show the page limits and the corner position
    // of the selected corner for coord origin of new items
    // Not also this item has no peer in WS_DATA_MODEL list.
    const int penWidth = 0;     // This value is to use the default thickness line
    constexpr double markerSize = Millimeter2iu( 5 );
    m_pageDrawItem = std::make_unique<WS_DRAW_ITEM_PAGE>( penWidth, markerSize );
    m_view->Add( m_pageDrawItem.get() );

    selTool->RebuildSelection();

    // Gives a reasonable boundary to the view area
    // Otherwise scroll bars are not usable
    // A full size = 2 * page size allows a margin around the worksheet.
    // (Note: no need to have a large working area: nothing can be drawn outside th page size).
    double size_x = m_edaFrame->GetPageSizeIU().x;
    double size_y = m_edaFrame->GetPageSizeIU().y;
    BOX2D boundary( VECTOR2D( -size_x/4 , -size_y/4 ),
                    VECTOR2D( size_x * 1.5, size_y * 1.5) );
    m_view->SetBoundary( boundary );

    m_pageDrawItem->SetPageSize( m_edaFrame->GetPageSizeIU() );
    wxPoint originCoord = static_cast<PL_EDITOR_FRAME*>( m_edaFrame )->ReturnCoordOriginCorner();
    m_pageDrawItem->SetMarkerPos( originCoord );
}


bool PL_DRAW_PANEL_GAL::SwitchBackend( GAL_TYPE aGalType )
{
    bool rv = EDA_DRAW_PANEL_GAL::SwitchBackend( aGalType );

    // The next onPaint event will call m_view->UpdateItems() that is very time consumming
    // after switching to opengl. Clearing m_view and rebuild it is much faster
    if( aGalType == GAL_TYPE_OPENGL )
        m_view->Clear();

    setDefaultLayerDeps();

    GetGAL()->SetWorldUnitLength( 1.0/IU_PER_MM /* 10 nm */ / 25.4 /* 1 inch in mm */ );

    return rv;
}


void PL_DRAW_PANEL_GAL::setDefaultLayerDeps()
{
    for( int i = 0; i < KIGFX::VIEW::VIEW_MAX_LAYERS; i++ )
        m_view->SetLayerTarget( i, KIGFX::TARGET_NONCACHED );

    m_view->SetLayerDisplayOnly( LAYER_WORKSHEET );

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

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


void PL_DRAW_PANEL_GAL::SetTopLayer( int aLayer )
{
    m_view->ClearTopLayers();
    m_view->SetTopLayer( aLayer );

    m_view->SetTopLayer( LAYER_SELECT_OVERLAY );

    m_view->SetTopLayer( LAYER_GP_OVERLAY );

    m_view->UpdateAllLayersOrder();
}