/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2004-2020 KiCad Developers.
 *
 * 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 <board_design_settings.h>
#include <drc/drc_engine.h>
#include <drc/drc_item.h>
#include <drc/drc_rule.h>
#include <drc/drc_test_provider.h>

#include <drawing_sheet/ds_draw_item.h>
#include <drawing_sheet/ds_proxy_view_item.h>

/*
    Miscellaneous tests:

    - DRCE_DISABLED_LAYER_ITEM,               ///< item on a disabled layer
    - DRCE_INVALID_OUTLINE,                   ///< invalid board outline
    - DRCE_UNRESOLVED_VARIABLE,

    TODO:
    - if grows too big, split into separate providers
*/

class DRC_TEST_PROVIDER_MISC : public DRC_TEST_PROVIDER
{
public:
    DRC_TEST_PROVIDER_MISC() :
        m_board( nullptr )
    {
        m_isRuleDriven = false;
    }

    virtual ~DRC_TEST_PROVIDER_MISC()
    {
    }

    virtual bool Run() override;

    virtual const wxString GetName() const override
    {
        return "miscellaneous";
    };

    virtual const wxString GetDescription() const override
    {
        return "Misc checks (board outline, missing textvars)";
    }

    virtual std::set<DRC_CONSTRAINT_T> GetConstraintTypes() const override;

    int GetNumPhases() const override;

private:
    void testOutline();
    void testDisabledLayers();
    void testTextVars();

    BOARD* m_board;
};


void DRC_TEST_PROVIDER_MISC::testOutline()
{
    SHAPE_POLY_SET dummyOutline;
    bool           errorHandled = false;

    OUTLINE_ERROR_HANDLER errorHandler =
            [&]( const wxString& msg, BOARD_ITEM* itemA, BOARD_ITEM* itemB, const wxPoint& pt )
            {
                std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_INVALID_OUTLINE );

                drcItem->SetErrorMessage( drcItem->GetErrorText() + wxS( " " ) + msg );
                drcItem->SetItems( itemA, itemB );

                reportViolation( drcItem, pt );
                errorHandled = true;
            };

    // Use a really tight chaining epsilon here so that we report errors that might affect
    // other tools (such as STEP export).
    constexpr int chainingEpsilon = Millimeter2iu( 0.02 ) / 100;

    if( !BuildBoardPolygonOutlines( m_board, dummyOutline, m_board->GetDesignSettings().m_MaxError,
                                    chainingEpsilon, &errorHandler ) )
    {
        if( errorHandled )
        {
            // if there is an invalid outline, then there must be an outline
        }
        else
        {
            std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_INVALID_OUTLINE );

            m_msg.Printf( _( "(no edges found on Edge.Cuts layer)" ) );

            drcItem->SetErrorMessage( drcItem->GetErrorText() + wxS( " " ) + m_msg );
            drcItem->SetItems( m_board );

            reportViolation( drcItem, m_board->GetBoundingBox().Centre() );
        }
    }
}


void DRC_TEST_PROVIDER_MISC::testDisabledLayers()
{
    LSET disabledLayers = m_board->GetEnabledLayers().flip();

    // Perform the test only for copper layers
    disabledLayers &= LSET::AllCuMask();

    auto checkDisabledLayers =
            [&]( BOARD_ITEM* item ) -> bool
            {
                LSET refLayers ( item->GetLayer() );

                if( ( disabledLayers & refLayers ).any() )
                {
                    std::shared_ptr<DRC_ITEM>drcItem = DRC_ITEM::Create( DRCE_DISABLED_LAYER_ITEM );

                    m_msg.Printf( _( "(layer %s)" ),
                                  item->GetLayerName() );

                    drcItem->SetErrorMessage( drcItem->GetErrorText() + wxS( " " ) + m_msg );
                    drcItem->SetItems( item );

                    reportViolation( drcItem, item->GetPosition() );
                }
                return true;
            };

    // fixme: what about graphical items?
    forEachGeometryItem( { PCB_TRACE_T, PCB_ARC_T, PCB_VIA_T, PCB_ZONE_T, PCB_PAD_T },
                           LSET::AllLayersMask(), checkDisabledLayers );
}

void DRC_TEST_PROVIDER_MISC::testTextVars()
{
    auto checkUnresolvedTextVar =
            [&]( EDA_ITEM* item ) -> bool
            {
                if( m_drcEngine->IsErrorLimitExceeded( DRCE_UNRESOLVED_VARIABLE ) )
                    return false;

                EDA_TEXT* text = dynamic_cast<EDA_TEXT*>( item );

                if( text && text->GetShownText().Matches( wxT( "*${*}*" ) ) )
                {
                    std::shared_ptr<DRC_ITEM>drcItem = DRC_ITEM::Create( DRCE_UNRESOLVED_VARIABLE );
                    drcItem->SetItems( item );

                    reportViolation( drcItem, item->GetPosition() );
                }
                return true;
            };

    forEachGeometryItem( { PCB_FP_TEXT_T, PCB_TEXT_T }, LSET::AllLayersMask(),
                         checkUnresolvedTextVar );

    DS_PROXY_VIEW_ITEM* drawingSheet = m_drcEngine->GetDrawingSheet();
    DS_DRAW_ITEM_LIST   drawItems;

    if( !drawingSheet || m_drcEngine->IsErrorLimitExceeded( DRCE_UNRESOLVED_VARIABLE ) )
        return;

    drawItems.SetMilsToIUfactor( IU_PER_MILS );
    drawItems.SetPageNumber( "1" );
    drawItems.SetSheetCount( 1 );
    drawItems.SetFileName( "dummyFilename" );
    drawItems.SetSheetName( "dummySheet" );
    drawItems.SetSheetLayer( "dummyLayer" );
    drawItems.SetProject( m_board->GetProject() );
    drawItems.BuildDrawItemsList( drawingSheet->GetPageInfo(), drawingSheet->GetTitleBlock() );

    for( DS_DRAW_ITEM_BASE* item = drawItems.GetFirst(); item; item = drawItems.GetNext() )
    {
        if( m_drcEngine->IsErrorLimitExceeded( DRCE_UNRESOLVED_VARIABLE ) )
            break;

        DS_DRAW_ITEM_TEXT* text = dynamic_cast<DS_DRAW_ITEM_TEXT*>( item );

        if( text && text->GetShownText().Matches( wxT( "*${*}*" ) ) )
        {
            std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_UNRESOLVED_VARIABLE );
            drcItem->SetItems( text );

            reportViolation( drcItem, text->GetPosition() );
        }
    }
}


bool DRC_TEST_PROVIDER_MISC::Run()
{
    m_board = m_drcEngine->GetBoard();

    if( !m_drcEngine->IsErrorLimitExceeded( DRCE_INVALID_OUTLINE ) )
    {
        if( !reportPhase( _( "Checking board outline..." ) ) )
            return false;   // DRC cancelled

        testOutline();
    }

    if( !m_drcEngine->IsErrorLimitExceeded( DRCE_DISABLED_LAYER_ITEM ) )
    {
        if( !reportPhase( _( "Checking disabled layers..." ) ) )
            return false;   // DRC cancelled

        testDisabledLayers();
    }

    if( !m_drcEngine->IsErrorLimitExceeded( DRCE_UNRESOLVED_VARIABLE ) )
    {
        if( !reportPhase( _( "Checking text variables..." ) ) )
            return false;   // DRC cancelled

        testTextVars();
    }

    return true;
}


int DRC_TEST_PROVIDER_MISC::GetNumPhases() const
{
    return 3;
}


std::set<DRC_CONSTRAINT_T> DRC_TEST_PROVIDER_MISC::GetConstraintTypes() const
{
    return {};
}


namespace detail
{
static DRC_REGISTER_TEST_PROVIDER<DRC_TEST_PROVIDER_MISC> dummy;
}