/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2019 CERN
 *
 * 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 <kiface_i.h>
#include <macros.h>
#include <pcb_edit_frame.h>
#include <board.h>
#include <board_item.h>
#include <footprint.h>
#include <track.h>
#include <zone.h>
#include <cstdio>
#include <vector>
#include <ki_exception.h>
#include <locale_io.h>
#include <reporter.h>

#include <exporters/board_exporter_base.h>

static double iu2hyp( double iu )
{
    return iu / 1e9 / 0.0254;
}


class HYPERLYNX_EXPORTER;

class HYPERLYNX_PAD_STACK
{
public:
    friend class HYPERLYNX_EXPORTER;

    HYPERLYNX_PAD_STACK( BOARD* aBoard, const PAD* aPad );
    HYPERLYNX_PAD_STACK( BOARD* aBoard, const VIA* aVia );
    ~HYPERLYNX_PAD_STACK(){};

    bool isThrough() const
    {
        return m_type == PAD_ATTRIB_NPTH || m_type == PAD_ATTRIB_PTH;
    }

    bool operator==( const HYPERLYNX_PAD_STACK& other ) const
    {
        if( m_shape != other.m_shape )
            return false;

        if( m_type != other.m_type )
            return false;

        if( isThrough() && other.isThrough() && m_drill != other.m_drill )
            return false;

        if( m_sx != other.m_sx )
            return false;

        if( m_sy != other.m_sy )
            return false;

        if( m_layers != other.m_layers )
            return false;

        if( m_angle != other.m_angle )
            return false;

        return true;
    }

    bool isSMD() const
    {
        return m_type == PAD_ATTRIB_SMD;
    }

    PCB_LAYER_ID getSMDLayer() const
    {
        for( auto l : LSET::AllCuMask().Seq() )
        {
            if( m_layers[l] )
                return l;
        }
        return F_Cu;
    }

    void SetId( int id )
    {
        m_id = id;
    }

    int GetId() const
    {
        return m_id;
    }

    int IsSupportedByExporter() const
    {
        switch( m_shape )
        {
        case PAD_SHAPE_CIRCLE:
        case PAD_SHAPE_OVAL:
        case PAD_SHAPE_ROUNDRECT:
        case PAD_SHAPE_RECT: return true;
        default: return false;
        }
    }

    bool isEmpty() const
    {
        LSET layerMask = LSET::AllCuMask() & m_board->GetEnabledLayers();
        LSET outLayers = m_layers & layerMask;

        return outLayers.none();
    }

private:
    BOARD*      m_board;
    int         m_id;
    int         m_drill;
    PAD_SHAPE_T m_shape;
    int         m_sx, m_sy;
    double      m_angle;
    LSET        m_layers;
    PAD_ATTR_T  m_type;
};


class HYPERLYNX_EXPORTER : public BOARD_EXPORTER_BASE
{
public:
    HYPERLYNX_EXPORTER() : m_polyId( 1 )
    {
    }

    ~HYPERLYNX_EXPORTER(){};

    virtual bool Run() override;

private:
    HYPERLYNX_PAD_STACK* addPadStack( HYPERLYNX_PAD_STACK stack )
    {
        for( HYPERLYNX_PAD_STACK* p : m_padStacks )
        {
            if( *p == stack )
                return p;
        }

        stack.SetId( m_padStacks.size() );
        m_padStacks.push_back( new HYPERLYNX_PAD_STACK( stack ) );

        return m_padStacks.back();
    }

    const std::string formatPadShape( const HYPERLYNX_PAD_STACK& aStack )
    {
        int  shapeId = 0;
        char buf[1024];

        switch( aStack.m_shape )
        {
        case PAD_SHAPE_CIRCLE:
        case PAD_SHAPE_OVAL:      shapeId = 0; break;
        case PAD_SHAPE_ROUNDRECT: shapeId = 2; break;
        case PAD_SHAPE_RECT:      shapeId = 1; break;
        default:
            shapeId = 0;

            if( m_reporter )
            {
                m_reporter->Report(
                        _( "File contains pad shapes that are not supported by the Hyperlynx exporter\n"
                           "(Supported shapes are oval, rectangle, circle.)\n"
                           "They have been exported as oval pads." ),
                        RPT_SEVERITY_WARNING );
            }
            break;
        }

        snprintf( buf, sizeof( buf ), "%d, %.9f, %.9f, %.1f, M", shapeId,
                iu2hyp( aStack.m_sx ),
                iu2hyp( aStack.m_sy ),
                aStack.m_angle );

        return buf;
    }

    bool generateHeaders();
    bool writeBoardInfo();
    bool writeStackupInfo();
    bool writeDevices();
    bool writePadStacks();
    bool writeNets();
    bool writeNetObjects( const std::vector<BOARD_ITEM*>& aObjects );


    void writeSinglePadStack( HYPERLYNX_PAD_STACK& aStack );

    const std::vector<BOARD_ITEM*> collectNetObjects( int netcode );

    std::vector<HYPERLYNX_PAD_STACK*>           m_padStacks;
    std::map<BOARD_ITEM*, HYPERLYNX_PAD_STACK*> m_padMap;


    std::shared_ptr<FILE_OUTPUTFORMATTER> m_out;
    int                                   m_polyId;
};


HYPERLYNX_PAD_STACK::HYPERLYNX_PAD_STACK( BOARD* aBoard, const PAD* aPad )
{
    m_board = aBoard;
    m_sx    = aPad->GetSize().x;
    m_sy    = aPad->GetSize().y;
    m_angle = 180.0 - ( aPad->GetOrientation() / 10.0 );

    if( m_angle < 0.0 )
    {
        m_angle += 360.0;
    }

    m_layers = aPad->GetLayerSet();
    m_drill  = aPad->GetDrillSize().x;
    m_shape  = aPad->GetShape();
    m_type   = PAD_ATTRIB_PTH;
    m_id     = 0;
}


HYPERLYNX_PAD_STACK::HYPERLYNX_PAD_STACK( BOARD* aBoard, const VIA* aVia )
{
    m_board  = aBoard;
    m_sx     = aVia->GetWidth();
    m_sy     = aVia->GetWidth();
    m_angle  = 0;
    m_layers = LSET::AllCuMask();
    m_drill  = aVia->GetDrillValue();
    m_shape  = PAD_SHAPE_CIRCLE;
    m_type   = PAD_ATTRIB_PTH;
    m_id     = 0;
}


bool HYPERLYNX_EXPORTER::generateHeaders()
{
    m_out->Print( 0, "{VERSION=2.14}\n" );
    m_out->Print( 0, "{UNITS=ENGLISH LENGTH}\n\n" );
    return true;
}


void HYPERLYNX_EXPORTER::writeSinglePadStack( HYPERLYNX_PAD_STACK& aStack )
{
    LSET layerMask = LSET::AllCuMask() & m_board->GetEnabledLayers();
    LSET outLayers = aStack.m_layers & layerMask;

    if( outLayers.none() )
        return;

    m_out->Print( 0, "{PADSTACK=%d, %.9f\n", aStack.m_id, iu2hyp( aStack.m_drill ) );

    if( outLayers == layerMask )
    {
        m_out->Print( 1, "(\"%s\", %s)\n", "MDEF", formatPadShape( aStack ).c_str() );
    }
    else
    {
        for( PCB_LAYER_ID l : outLayers.Seq() )
        {
            m_out->Print( 1, "(\"%s\", %s)\n", (const char*) m_board->GetLayerName( l ).c_str(),
                    formatPadShape( aStack ).c_str() );
        }
    }

    m_out->Print( 0, "}\n\n" );
}


bool HYPERLYNX_EXPORTER::writeBoardInfo()
{
    SHAPE_POLY_SET outlines;

    m_out->Print( 0, "{BOARD \"%s\"\n", (const char*) m_board->GetFileName().c_str() );

    if( !m_board->GetBoardPolygonOutlines( outlines ) )
    {
        wxLogError( _( "Board outline is malformed. Run DRC for a full analysis." ) );
        return false;
    }

    for( int o = 0; o < outlines.OutlineCount(); o++ )
    {
        const SHAPE_LINE_CHAIN& outl = outlines.COutline( o );

        for( int i = 0; i < outl.SegmentCount(); i++ )
        {
            const auto& s = outl.CSegment( i );
            m_out->Print( 1, "(PERIMETER_SEGMENT X1=%.9f Y1=%.9f X2=%.9f Y2=%.9f)\n",
                    iu2hyp( s.A.x ), iu2hyp( s.A.y ), iu2hyp( s.B.x ), iu2hyp( s.B.y ) );
        }
    }

    m_out->Print( 0, "}\n\n" );

    return true;
}


bool HYPERLYNX_EXPORTER::writeStackupInfo()
{
    /* Format:
     * {STACKUP
     * (SIGNAL T=thickness [P=plating_thickness] [C=constant] L=layer_name [M=material_name]) [comment]
     * (DIELECTRIC T=thickness [C=constant] [L=layer_name] [M=material_name]) [comment]
     * }
     * name lenght is <= 20 chars
     */

    LSEQ layers = m_board->GetDesignSettings().GetEnabledLayers().CuStack();

    // Get the board physical stackup structure
    const BOARD_STACKUP& stackup = m_board->GetDesignSettings().GetStackupDescriptor();

    m_out->Print( 0, "{STACKUP\n" );

    wxString layer_name;    // The last copper layer name used in stackup

    for( BOARD_STACKUP_ITEM* item: stackup.GetList() )
    {
        if( item->GetType() == BS_ITEM_TYPE_COPPER )
        {
            layer_name = m_board->GetLayerName( item->GetBrdLayerId() );
            int plating_thickness = 0;
            double resistivity = 1.724e-8;  // Good for copper
            m_out->Print( 1, "(SIGNAL T=%g P=%g C=%g L=\"%.20s\" M=COPPER)\n",
                          iu2hyp( item->GetThickness( 0 ) ),
                          iu2hyp( plating_thickness ),
                          resistivity,
                          TO_UTF8( layer_name ) );
        }
        else if( item->GetType() == BS_ITEM_TYPE_DIELECTRIC )
        {
            if( item->GetSublayersCount() < 2 )
            {
                m_out->Print( 1, "(DIELECTRIC T=%g C=%g L=\"DE_%.17s\" M=\"%.20s\")\n",
                              iu2hyp( item->GetThickness( 0 ) ),
                              item->GetEpsilonR( 0 ),
                              TO_UTF8( layer_name ),
                              TO_UTF8( item->GetMaterial( 0 ) ) );
            }
            else for( int idx = 0; idx < item->GetSublayersCount(); idx++ )
            {
                m_out->Print( 1, "(DIELECTRIC T=%g C=%g L=\"DE%d_%.16s\" M=\"%.20s\")\n",
                              iu2hyp( item->GetThickness( idx ) ),
                              item->GetEpsilonR( idx ),
                              idx, TO_UTF8( layer_name ),
                              TO_UTF8( item->GetMaterial( idx ) ) );
            }
        }
    }

    m_out->Print( 0, "}\n\n" );

    return true;
}


bool HYPERLYNX_EXPORTER::writeDevices()
{
    m_out->Print( 0, "{DEVICES\n" );

    for( FOOTPRINT* footprint : m_board->Footprints() )
    {
        wxString ref = footprint->GetReference();
        wxString layerName = m_board->GetLayerName( footprint->GetLayer() );

        if( ref.IsEmpty() )
            ref = "EMPTY";

        m_out->Print( 1, "(? REF=\"%s\" L=\"%s\")\n", (const char*) ref.c_str(),
                (const char*) layerName.c_str() );
    }
    m_out->Print( 0, "}\n\n" );

    return true;
}


bool HYPERLYNX_EXPORTER::writePadStacks()
{
    for( FOOTPRINT* footprint : m_board->Footprints() )
    {
        for( PAD* pad : footprint->Pads() )
        {
            HYPERLYNX_PAD_STACK* ps = addPadStack( HYPERLYNX_PAD_STACK( m_board, pad ) );
            m_padMap[pad] = ps;
        }
    }

    for( TRACK* trk : m_board->Tracks() )
    {
        if( VIA* via = dyn_cast<VIA*>( trk ) )
        {
            HYPERLYNX_PAD_STACK* ps = addPadStack( HYPERLYNX_PAD_STACK( m_board, via ) );
            m_padMap[via] = ps;
        }
    }

    for( HYPERLYNX_PAD_STACK* pstack : m_padStacks )
        writeSinglePadStack( *pstack );

    return true;
}


bool HYPERLYNX_EXPORTER::writeNetObjects( const std::vector<BOARD_ITEM*>& aObjects )
{
    for( BOARD_ITEM* item : aObjects )
    {
        if( PAD* pad = dyn_cast<PAD*>( item ) )
        {
            auto pstackIter = m_padMap.find( pad );

            if( pstackIter != m_padMap.end() )
            {
                wxString ref = pad->GetParent()->GetReference();

                if( ref.IsEmpty() )
                    ref = "EMPTY";

                wxString padName = pad->GetName();

                if( padName.IsEmpty() )
                    padName = "1";


                m_out->Print( 1, "(PIN X=%.10f Y=%.10f R=\"%s.%s\" P=%d)\n",
                        iu2hyp( pad->GetPosition().x ), iu2hyp( pad->GetPosition().y ),
                        (const char*) ref.c_str(), (const char*) padName.c_str(),
                        pstackIter->second->GetId() );
            }
        }
        else if( VIA* via = dyn_cast<VIA*>( item ) )
        {
            auto pstackIter = m_padMap.find( via );

            if( pstackIter != m_padMap.end() )
            {
                m_out->Print( 1, "(VIA X=%.10f Y=%.10f P=%d)\n", iu2hyp( via->GetPosition().x ),
                        iu2hyp( via->GetPosition().y ), pstackIter->second->GetId() );
            }
        }
        else if( TRACK* track = dyn_cast<TRACK*>( item ) )
        {
            const wxString layerName = m_board->GetLayerName( track->GetLayer() );

            m_out->Print( 1, "(SEG X1=%.10f Y1=%.10f X2=%.10f Y2=%.10f W=%.10f L=\"%s\")\n",
                    iu2hyp( track->GetStart().x ), iu2hyp( track->GetStart().y ),
                    iu2hyp( track->GetEnd().x ), iu2hyp( track->GetEnd().y ),
                    iu2hyp( track->GetWidth() ), (const char*) layerName.c_str() );
        }
        else if( ZONE* zone = dyn_cast<ZONE*>( item ) )
        {
            for( PCB_LAYER_ID layer : zone->GetLayerSet().Seq() )
            {
                const wxString layerName   = m_board->GetLayerName( layer );
                SHAPE_POLY_SET filledShape = zone->GetFilledPolysList( layer );

                filledShape.Simplify( SHAPE_POLY_SET::PM_FAST );

                for( int i = 0; i < filledShape.OutlineCount(); i++ )
                {
                    const SHAPE_LINE_CHAIN& outl = filledShape.COutline( i );

                    auto p0 = outl.CPoint( 0 );
                    m_out->Print( 1, "{POLYGON T=POUR L=\"%s\" ID=%d X=%.10f Y=%.10f\n",
                            (const char*) layerName.c_str(), m_polyId, iu2hyp( p0.x ),
                            iu2hyp( p0.y ) );

                    for( int v = 0; v < outl.PointCount(); v++ )
                    {
                        m_out->Print( 2, "(LINE X=%.10f Y=%.10f)\n", iu2hyp( outl.CPoint( v ).x ),
                                iu2hyp( outl.CPoint( v ).y ) );
                    }

                    m_out->Print( 2, "(LINE X=%.10f Y=%.10f)\n", iu2hyp( p0.x ), iu2hyp( p0.y ) );
                    m_out->Print( 1, "}\n" );

                    for( int h = 0; h < filledShape.HoleCount( i ); h++ )
                    {
                        const SHAPE_LINE_CHAIN& holeShape = filledShape.CHole( i, h );
                        VECTOR2I                ph0       = holeShape.CPoint( 0 );

                        m_out->Print( 1, "{POLYVOID ID=%d X=%.10f Y=%.10f\n", m_polyId,
                                iu2hyp( ph0.x ), iu2hyp( ph0.y ) );

                        for( int v = 0; v < holeShape.PointCount(); v++ )
                        {
                            m_out->Print( 2, "(LINE X=%.10f Y=%.10f)\n",
                                    iu2hyp( holeShape.CPoint( v ).x ),
                                    iu2hyp( holeShape.CPoint( v ).y ) );
                        }

                        m_out->Print( 2, "(LINE X=%.10f Y=%.10f)\n",
                                iu2hyp( ph0.x ), iu2hyp( ph0.y ) );
                        m_out->Print( 1, "}\n" );
                    }

                    m_polyId++;
                }
            }
        }
    }

    return true;
}


const std::vector<BOARD_ITEM*> HYPERLYNX_EXPORTER::collectNetObjects( int netcode )
{
    std::vector<BOARD_ITEM*> rv;

    auto check =
            [&]( BOARD_CONNECTED_ITEM* item ) -> bool
            {
                if( ( item->GetLayerSet() & LSET::AllCuMask() ).none() )
                    return false;

                if( item->GetNetCode() == netcode || ( netcode < 0 && item->GetNetCode() <= 0 ) )
                    return true;

                return false;
            };

    for( FOOTPRINT* footprint : m_board->Footprints() )
    {
        for( PAD* pad : footprint->Pads() )
        {
            if( check( pad ) )
                rv.push_back( pad );
        }
    }

    for( TRACK* item : m_board->Tracks() )
    {
        if( check( item ) )
            rv.push_back( item );
    }

    for( ZONE* zone : m_board->Zones() )
    {
        if( check( zone ) )
            rv.push_back( zone );
    }

    return rv;
}


bool HYPERLYNX_EXPORTER::writeNets()
{
    m_polyId = 1;

    for( const auto netInfo : m_board->GetNetInfo() )
    {
        int netcode = netInfo->GetNetCode();
        bool isNullNet = netInfo->GetNetCode() <= 0 || netInfo->GetNetname().IsEmpty();

        if( isNullNet )
            continue;

        auto netObjects = collectNetObjects( netcode );

        if( netObjects.size() )
        {
            m_out->Print( 0, "{NET=\"%s\"\n", (const char*) netInfo->GetNetname().c_str() );
            writeNetObjects( netObjects );
            m_out->Print( 0, "}\n\n" );
        }
    }

    auto nullNetObjects = collectNetObjects( -1 );

    int idx = 0;

    for( auto item : nullNetObjects )
    {
        m_out->Print( 0, "{NET=\"EmptyNet%d\"\n", idx );
        writeNetObjects( { item } );
        m_out->Print( 0, "}\n\n" );
        idx++;
    }

    return true;
}


bool HYPERLYNX_EXPORTER::Run()
{
    LOCALE_IO toggle; // toggles on, then off, the C locale.

    try
    {
        m_out.reset( new FILE_OUTPUTFORMATTER( m_outputFilePath.GetFullPath() ) );

        generateHeaders();
        writeBoardInfo();
        writeStackupInfo();
        writeDevices();
        writePadStacks();
        writeNets();
    }
    catch( IO_ERROR& )
    {
        return false;
    }

    return true;
}


bool ExportBoardToHyperlynx( BOARD* aBoard, const wxFileName& aPath )
{
    HYPERLYNX_EXPORTER exporter;
    exporter.SetBoard( aBoard );
    exporter.SetOutputFilename( aPath );
    return exporter.Run();
}