/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2022 Mikolaj Wielgus
 * Copyright (C) 2022 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, you may find one here:
 * https://www.gnu.org/licenses/gpl-3.0.html
 * or you may search the http://www.gnu.org website for the version 3 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#include <sim/sim_model_raw_spice.h>

#include <boost/algorithm/string/predicate.hpp>
#include <fmt/core.h>
#include <pegtl.hpp>
#include <pegtl/contrib/parse_tree.hpp>


namespace SIM_MODEL_RAW_SPICE_PARSER
{
    using namespace SIM_MODEL_GRAMMAR;

    template <typename Rule> struct legacyPinSequenceSelector : std::false_type {};
    template <> struct legacyPinSequenceSelector<legacyPinNumber> : std::true_type {};
}


std::string SPICE_GENERATOR_RAW_SPICE::ModelLine( const SPICE_ITEM& aItem ) const
{
    return "";
}


std::string SPICE_GENERATOR_RAW_SPICE::ItemName( const SPICE_ITEM& aItem ) const
{
    std::string elementType = m_model.GetParam(
        static_cast<int>( SIM_MODEL_RAW_SPICE::SPICE_PARAM::TYPE ) ).value->ToString();

    if( aItem.refName != "" && boost::starts_with( aItem.refName, elementType ) )
        return aItem.refName;
    else
        return fmt::format( "{}{}", elementType, aItem.refName );
}


std::string SPICE_GENERATOR_RAW_SPICE::ItemPins( const SPICE_ITEM& aItem ) const
{
    std::string result;

    for( const SIM_MODEL::PIN& pin : GetPins() )
    {
        auto it = std::find( aItem.pinNumbers.begin(), aItem.pinNumbers.end(),
                             pin.symbolPinNumber );

        if( it != aItem.pinNumbers.end() )
        {
            long symbolPinIndex = std::distance( aItem.pinNumbers.begin(), it );
            result.append( fmt::format( " {}", aItem.pinNetNames.at( symbolPinIndex ) ) );
        }
    }

    return result;
}


std::string SPICE_GENERATOR_RAW_SPICE::ItemModelName( const SPICE_ITEM& aItem ) const
{
    return "";
}


std::string SPICE_GENERATOR_RAW_SPICE::ItemParams() const
{
    std::string result;

    for( const SIM_MODEL::PARAM& param : GetInstanceParams() )
    {
        if( param.info.name == "model" )
            result.append( " " + param.value->ToString() );
    }

    return result;
}


std::string SPICE_GENERATOR_RAW_SPICE::Preview( const SPICE_ITEM& aItem ) const
{
    SPICE_ITEM item = aItem;
    item.refName = "";

    for( int i = 0; i < m_model.GetPinCount(); ++i )
    {
        item.pinNumbers.push_back( fmt::format( "{}", i + 1 ) );
        item.pinNetNames.push_back( fmt::format( "{}", i + 1 ) );
    }

    return ItemLine( item );
}


SIM_MODEL_RAW_SPICE::SIM_MODEL_RAW_SPICE() :
    SIM_MODEL( TYPE::RAWSPICE, std::make_unique<SPICE_GENERATOR_RAW_SPICE>( *this ) )
{
    static std::vector<PARAM::INFO> paramInfos = makeParamInfos();

    for( const PARAM::INFO& paramInfo : paramInfos )
        AddParam( paramInfo );
}


void SIM_MODEL_RAW_SPICE::ReadDataSchFields( unsigned aSymbolPinCount,
                                             const std::vector<SCH_FIELD>* aFields )
{
    SIM_MODEL::ReadDataSchFields( aSymbolPinCount, aFields );
    readLegacyDataFields( aSymbolPinCount, aFields );
}


void SIM_MODEL_RAW_SPICE::ReadDataLibFields( unsigned aSymbolPinCount,
                                             const std::vector<LIB_FIELD>* aFields )
{
    SIM_MODEL::ReadDataLibFields( aSymbolPinCount, aFields );
    readLegacyDataFields( aSymbolPinCount, aFields );
}


void SIM_MODEL_RAW_SPICE::WriteDataSchFields( std::vector<SCH_FIELD>& aFields ) const
{
    SIM_MODEL::WriteDataSchFields( aFields );
    
    // Erase the legacy fields.
    SetFieldValue( aFields, LEGACY_TYPE_FIELD, "" );
    SetFieldValue( aFields, LEGACY_PINS_FIELD, "" );
    SetFieldValue( aFields, LEGACY_MODEL_FIELD, "" );
    SetFieldValue( aFields, LEGACY_ENABLED_FIELD, "" );
    SetFieldValue( aFields, LEGACY_LIB_FIELD, "" );
}


void SIM_MODEL_RAW_SPICE::WriteDataLibFields( std::vector<LIB_FIELD>& aFields ) const
{
    SIM_MODEL::WriteDataLibFields( aFields );
}


void SIM_MODEL_RAW_SPICE::CreatePins( unsigned aSymbolPinCount )
{
    for( unsigned symbolPinIndex = 0; symbolPinIndex < aSymbolPinCount; ++symbolPinIndex )
        AddPin( { "", fmt::format( "{}", symbolPinIndex + 1 ) } );
}


std::vector<SIM_MODEL::PARAM::INFO> SIM_MODEL_RAW_SPICE::makeParamInfos()
{
    std::vector<PARAM::INFO> paramInfos;

    for( SPICE_PARAM spiceParam : SPICE_PARAM_ITERATOR() )
    {
        PARAM::INFO paramInfo;

        switch( spiceParam )
        {
        case SPICE_PARAM::TYPE:
            paramInfo.name = "type";
            paramInfo.type = SIM_VALUE::TYPE_STRING;
            paramInfo.unit = "";
            paramInfo.category = SIM_MODEL::PARAM::CATEGORY::PRINCIPAL;
            paramInfo.defaultValue = "";
            paramInfo.description = "Spice element type";
            paramInfo.isSpiceInstanceParam = true;

            paramInfos.push_back( paramInfo );
            break;

        case SPICE_PARAM::MODEL:
            paramInfo.name = "model";
            paramInfo.type = SIM_VALUE::TYPE_STRING;
            paramInfo.unit = "";
            paramInfo.category = SIM_MODEL::PARAM::CATEGORY::PRINCIPAL;
            paramInfo.defaultValue = "";
            paramInfo.description = "Model name or value";
            paramInfo.isSpiceInstanceParam = true;

            paramInfos.push_back( paramInfo );
            break;

        case SPICE_PARAM::LIB:
            paramInfo.name = "lib";
            paramInfo.type = SIM_VALUE::TYPE_STRING;
            paramInfo.unit = "";
            paramInfo.category = SIM_MODEL::PARAM::CATEGORY::PRINCIPAL;
            paramInfo.defaultValue = "";
            paramInfo.description = "Library path to include";
            paramInfo.isSpiceInstanceParam = true;

            paramInfos.push_back( paramInfo );
            break;

        case SPICE_PARAM::_ENUM_END:
            break;
        }
    }

    return paramInfos;
}


template <typename T>
void SIM_MODEL_RAW_SPICE::readLegacyDataFields( unsigned aSymbolPinCount,
                                                const std::vector<T>* aFields )
{
    // Fill in the blanks with the legacy parameters.

    if( GetParam( static_cast<int>( SPICE_PARAM::TYPE ) ).value->ToString() == "" )
    {
        SetParamValue( static_cast<int>( SPICE_PARAM::TYPE ),
                       GetFieldValue( aFields, LEGACY_TYPE_FIELD ) );
    }

    if( GetFieldValue( aFields, PINS_FIELD ) == "" )
        parseLegacyPinsField( aSymbolPinCount, GetFieldValue( aFields, LEGACY_PINS_FIELD ) );

    if( GetParam( static_cast<int>( SPICE_PARAM::MODEL ) ).value->ToString() == "" )
    {
        SetParamValue( static_cast<int>( SPICE_PARAM::MODEL ),
                       GetFieldValue( aFields, LEGACY_MODEL_FIELD ) );
    }

    // If model param is still empty, then use Value field.
    if( GetParam( static_cast<int>( SPICE_PARAM::MODEL ) ).value->ToString() == "" )
    {
        SetParamValue( static_cast<int>( SPICE_PARAM::MODEL ),
                       GetFieldValue( aFields, SIM_MODEL::VALUE_FIELD ) );
    }

    if( GetParam( static_cast<int>( SPICE_PARAM::LIB ) ).value->ToString() == "" )
    {
        SetParamValue( static_cast<int>( SPICE_PARAM::LIB ),
                       GetFieldValue( aFields, LEGACY_LIB_FIELD ) );
    }
}


void SIM_MODEL_RAW_SPICE::parseLegacyPinsField( unsigned aSymbolPinCount,
                                                const std::string& aLegacyPinsField )
{
    if( aLegacyPinsField == "" )
        return;

    // Initially set all pins to Not Connected to match the legacy behavior.
    for( int modelPinIndex = 0; modelPinIndex < GetPinCount(); ++modelPinIndex )
        SetPinSymbolPinNumber( static_cast<int>( modelPinIndex ), "" );

    tao::pegtl::string_input<> in( aLegacyPinsField, PINS_FIELD );
    std::unique_ptr<tao::pegtl::parse_tree::node> root;

    try
    {
        root = tao::pegtl::parse_tree::parse<SIM_MODEL_RAW_SPICE_PARSER::legacyPinSequenceGrammar,
                                             SIM_MODEL_RAW_SPICE_PARSER::legacyPinSequenceSelector>
                ( in );
    }
    catch( const tao::pegtl::parse_error& e )
    {
        THROW_IO_ERROR( e.what() );
    }

    for( int pinIndex = 0; pinIndex < static_cast<int>( root->children.size() ); ++pinIndex )
    {
        std::string symbolPinStr = root->children.at( pinIndex )->string();
        int symbolPinIndex = std::stoi( symbolPinStr ) - 1;

        if( symbolPinIndex < 0 || symbolPinIndex >= static_cast<int>( aSymbolPinCount ) )
            THROW_IO_ERROR( wxString::Format( _( "Invalid symbol pin index: '%s'" ), symbolPinStr ) );
                                              
        SetPinSymbolPinNumber( pinIndex, root->children.at( pinIndex )->string() );
    }
}