/*
 * 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 <common.h>
#include <pcb_shape.h>
#include <geometry/seg.h>
#include <geometry/shape_segment.h>
#include <drc/drc_engine.h>
#include <drc/drc_item.h>
#include <drc/drc_rule.h>
#include <drc/drc_test_provider_clearance_base.h>
#include "drc_rtree.h"

/*
    Board edge clearance test. Checks all items for their mechanical clearances against the board
    edge.
    Errors generated:
    - DRCE_COPPER_EDGE_CLEARANCE

    TODO:
    - separate holes to edge check
    - tester only looks for edge crossings. it doesn't check if items are inside/outside the board
      area.
    - pad test missing!
*/

class DRC_TEST_PROVIDER_EDGE_CLEARANCE : public DRC_TEST_PROVIDER_CLEARANCE_BASE
{
public:
    DRC_TEST_PROVIDER_EDGE_CLEARANCE () :
            DRC_TEST_PROVIDER_CLEARANCE_BASE()
    {
    }

    virtual ~DRC_TEST_PROVIDER_EDGE_CLEARANCE()
    {
    }

    virtual bool Run() override;

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

    virtual const wxString GetDescription() const override
    {
        return "Tests items vs board edge clearance";
    }

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

    int GetNumPhases() const override;

private:
    bool testAgainstEdge( BOARD_ITEM* item, SHAPE* itemShape, BOARD_ITEM* other,
                          DRC_CONSTRAINT_T aConstraintType, PCB_DRC_CODE aErrorCode );
};


bool DRC_TEST_PROVIDER_EDGE_CLEARANCE::testAgainstEdge( BOARD_ITEM* item, SHAPE* itemShape,
                                                        BOARD_ITEM* edge,
                                                        DRC_CONSTRAINT_T aConstraintType,
                                                        PCB_DRC_CODE aErrorCode )
{
    const std::shared_ptr<SHAPE>& edgeShape = edge->GetEffectiveShape( Edge_Cuts );

    auto constraint = m_drcEngine->EvalRulesForItems( aConstraintType, edge, item );

    int      minClearance = constraint.GetValue().Min();
    int      actual;
    VECTOR2I pos;

    if( minClearance >= 0 && itemShape->Collide( edgeShape.get(), minClearance, &actual, &pos ) )
    {
        std::shared_ptr<DRC_ITEM> drce = DRC_ITEM::Create( aErrorCode );

        // Only report clearance info if there is any; otherwise it's just a straight collision
        if( minClearance > 0 )
        {
            m_msg.Printf( _( "(%s clearance %s; actual %s)" ),
                          constraint.GetName(),
                          MessageTextFromValue( userUnits(), minClearance ),
                          MessageTextFromValue( userUnits(), actual ) );

            drce->SetErrorMessage( drce->GetErrorText() + wxS( " " ) + m_msg );
        }

        drce->SetItems( edge->m_Uuid, item->m_Uuid );
        drce->SetViolatingRule( constraint.GetParentRule() );

        reportViolation( drce, (wxPoint) pos );
    }

    return true;
}


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

    DRC_CONSTRAINT worstClearanceConstraint;

    if( m_drcEngine->QueryWorstConstraint( EDGE_CLEARANCE_CONSTRAINT, worstClearanceConstraint ) )
        m_largestClearance = worstClearanceConstraint.GetValue().Min();

    reportAux( "Worst clearance : %d nm", m_largestClearance );

    if( !reportPhase( _( "Checking board edge clearances..." ) ) )
        return false;
    
    std::vector<std::unique_ptr<PCB_SHAPE>> edges;          // we own these
    DRC_RTREE                               edgesTree;
    std::vector<BOARD_ITEM*>                boardItems;     // we don't own these

    auto queryBoardOutlineItems =
            [&]( BOARD_ITEM *item ) -> bool
            {
                PCB_SHAPE* shape = static_cast<PCB_SHAPE*>( item );

                if( shape->GetShape() == S_RECT )
                {
                    // A single rectangle for the board would make the RTree useless, so
                    // convert to 4 edges
                    edges.emplace_back( static_cast<PCB_SHAPE*>( shape->Clone() ) );
                    edges.back()->SetShape( S_SEGMENT );
                    edges.back()->SetEndX( shape->GetStartX() );
                    edges.back()->SetWidth( 0 );
                    edges.emplace_back( static_cast<PCB_SHAPE*>( shape->Clone() ) );
                    edges.back()->SetShape( S_SEGMENT );
                    edges.back()->SetEndY( shape->GetStartY() );
                    edges.back()->SetWidth( 0 );
                    edges.emplace_back( static_cast<PCB_SHAPE*>( shape->Clone() ) );
                    edges.back()->SetShape( S_SEGMENT );
                    edges.back()->SetStartX( shape->GetEndX() );
                    edges.back()->SetWidth( 0 );
                    edges.emplace_back( static_cast<PCB_SHAPE*>( shape->Clone() ) );
                    edges.back()->SetShape( S_SEGMENT );
                    edges.back()->SetStartY( shape->GetEndY() );
                    edges.back()->SetWidth( 0 );
                    return true;
                }
                else if( shape->GetShape() == S_POLYGON )
                {
                    // Same for polygons
                    SHAPE_LINE_CHAIN poly = shape->GetPolyShape().Outline( 0 );

                    for( size_t ii = 0; ii < poly.GetSegmentCount(); ++ii )
                    {
                        SEG seg = poly.CSegment( ii );
                        edges.emplace_back( static_cast<PCB_SHAPE*>( shape->Clone() ) );
                        edges.back()->SetShape( S_SEGMENT );
                        edges.back()->SetStart((wxPoint) seg.A );
                        edges.back()->SetEnd((wxPoint) seg.B );
                        edges.back()->SetWidth( 0 );
                    }
                }

                edges.emplace_back( static_cast<PCB_SHAPE*>( shape->Clone() ) );
                edges.back()->SetWidth( 0 );
                return true;
            };

    auto queryBoardGeometryItems =
            [&]( BOARD_ITEM *item ) -> bool
            {
                if( !isInvisibleText( item ) )
                    boardItems.push_back( item );

                return true;
            };

    forEachGeometryItem( { PCB_SHAPE_T }, LSET( 2, Edge_Cuts, Margin ), queryBoardOutlineItems );
    forEachGeometryItem( s_allBasicItemsButZones, LSET::AllCuMask(), queryBoardGeometryItems );

    for( const std::unique_ptr<PCB_SHAPE>& edge : edges )
        edgesTree.Insert( edge.get(), m_largestClearance );

    wxString val;
    wxGetEnv( "WXTRACE", &val );

    drc_dbg( 2, "outline: %d items, board: %d items\n",
             (int) edges.size(), (int) boardItems.size() );

    // This is the number of tests between 2 calls to the progress bar
    const int delta = 50;
    int       ii = 0;

    for( BOARD_ITEM* item : boardItems )
    {
        bool testCopper = !m_drcEngine->IsErrorLimitExceeded( DRCE_COPPER_EDGE_CLEARANCE );
        bool testSilk = !m_drcEngine->IsErrorLimitExceeded( DRCE_SILK_MASK_CLEARANCE );

        if( !testCopper && !testSilk )
            break;

        if( !reportProgress( ii++, boardItems.size(), delta ) )
            break;

        const std::shared_ptr<SHAPE>& itemShape = item->GetEffectiveShape();

        if( testCopper && item->IsOnCopperLayer() )
        {
            edgesTree.QueryColliding( item, UNDEFINED_LAYER, Edge_Cuts, nullptr,
                    [&]( BOARD_ITEM* edge ) -> bool
                    {
                        return testAgainstEdge( item, itemShape.get(), edge,
                                                EDGE_CLEARANCE_CONSTRAINT,
                                                DRCE_COPPER_EDGE_CLEARANCE );
                    },
                    m_largestClearance );
        }

        if( testSilk && ( item->GetLayer() == F_SilkS || item->GetLayer() == B_SilkS ) )
        {
            edgesTree.QueryColliding( item, UNDEFINED_LAYER, Edge_Cuts, nullptr,
                    [&]( BOARD_ITEM* edge ) -> bool
                    {
                        return testAgainstEdge( item, itemShape.get(), edge,
                                                SILK_CLEARANCE_CONSTRAINT,
                                                DRCE_SILK_MASK_CLEARANCE );
                    },
                    m_largestClearance );
        }
    }

    reportRuleStatistics();

    return true;
}


int DRC_TEST_PROVIDER_EDGE_CLEARANCE::GetNumPhases() const
{
    return 1;
}


std::set<DRC_CONSTRAINT_T> DRC_TEST_PROVIDER_EDGE_CLEARANCE::GetConstraintTypes() const
{
    return { EDGE_CLEARANCE_CONSTRAINT, SILK_CLEARANCE_CONSTRAINT };
}


namespace detail
{
    static DRC_REGISTER_TEST_PROVIDER<DRC_TEST_PROVIDER_EDGE_CLEARANCE> dummy;
}