/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2013-2016 CERN
 * Copyright The KiCad Developers, see AUTHORS.txt for contributors.
 *
 * @author Jean-Pierre Charras, jp.charras at wanadoo.fr
 *
 * 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 <build_version.h>
#include <string_utils.h>
#include <locale_io.h>
#include <math/vector2d.h>
#include <drawing_sheet/ds_painter.h>
#include <drawing_sheet/ds_data_item.h>
#include <drawing_sheet/ds_data_model.h>
#include <drawing_sheet/drawing_sheet_lexer.h>
#include <drawing_sheet/ds_file_versions.h>
#include <font/font.h>
#include <string_utils.h>

#include <wx/base64.h>
#include <wx/msgdlg.h>

using namespace DRAWINGSHEET_T;


// A helper function to write tokens:
static const char* getTokenName( T aTok )
{
    return DRAWING_SHEET_LEXER::TokenName( aTok );
}


/**
 * A basic helper class to write a drawing sheet file.
 *
 * Not used alone, a file writer or a string writer should be derived to use it.
 * Therefore the constructor is protected.
 */
class DS_DATA_MODEL_IO
{
public:
    void Format( DS_DATA_MODEL* aSheet ) const;

    void Format( DS_DATA_MODEL* aModel, std::vector<DS_DATA_ITEM*>& aItemsList ) const;
    void Format( DS_DATA_MODEL* aModel, DS_DATA_ITEM* aItem ) const;

protected:
    DS_DATA_MODEL_IO() { m_out = NULL; }
    virtual ~DS_DATA_MODEL_IO() {}

private:
    void format( DS_DATA_ITEM_TEXT* aItem ) const;
    void format( DS_DATA_MODEL* aModel, DS_DATA_ITEM* aItem ) const;
    void format( DS_DATA_ITEM_POLYGONS* aItem ) const;
    void format( DS_DATA_ITEM_BITMAP* aItem ) const;
    void formatCoordinate( const char* aToken, POINT_COORD& aCoord ) const;
    void formatRepeatParameters( DS_DATA_ITEM* aItem ) const;
    void formatOptions( DS_DATA_ITEM* aItem ) const;

protected:
    OUTPUTFORMATTER* m_out;
};


/**
 * A helper class to write a drawing sheet to a file.
 */
class DS_DATA_MODEL_FILEIO : public DS_DATA_MODEL_IO
{
public:
    DS_DATA_MODEL_FILEIO( const wxString& aFilename ) :
            DS_DATA_MODEL_IO(),
            m_fileout( nullptr )
    {
        try
        {
            m_fileout = new PRETTIFIED_FILE_OUTPUTFORMATTER( aFilename );
            m_out = m_fileout;
        }
        catch( const IO_ERROR& ioe )
        {
            wxMessageBox( ioe.What(), _( "Error writing drawing sheet file" ) );
        }
    }

    ~DS_DATA_MODEL_FILEIO()
    {
        delete m_fileout;
    }

private:
    PRETTIFIED_FILE_OUTPUTFORMATTER* m_fileout;
};


/**
 * A helper class to write a drawing sheet to a string.
 */
class DS_DATA_MODEL_STRINGIO : public DS_DATA_MODEL_IO
{
public:
    DS_DATA_MODEL_STRINGIO( wxString* aOutputString ) :
            DS_DATA_MODEL_IO(),
            m_output( aOutputString )
    {
        try
        {
            m_writer = new STRING_FORMATTER();
            m_out = m_writer;
        }
        catch( const IO_ERROR& ioe )
        {
            wxMessageBox( ioe.What(), _( "Error writing drawing sheet file" ) );
        }
    }

    ~DS_DATA_MODEL_STRINGIO()
    {
        *m_output = From_UTF8( m_writer->GetString().c_str() );
        delete m_writer;
    }

private:
    STRING_FORMATTER* m_writer;
    wxString*         m_output;
};


void DS_DATA_MODEL::Save( const wxString& aFullFileName )
{
    DS_DATA_MODEL_FILEIO writer( aFullFileName );
    writer.Format( this );
}


void DS_DATA_MODEL::SaveInString( wxString* aOutputString )
{
    DS_DATA_MODEL_STRINGIO writer( aOutputString );
    writer.Format( this );
}


void DS_DATA_MODEL::SaveInString( std::vector<DS_DATA_ITEM*>& aItemsList, wxString* aOutputString )
{
    DS_DATA_MODEL_STRINGIO writer( aOutputString );
    writer.Format( this, aItemsList );
}


void DS_DATA_MODEL_IO::Format( DS_DATA_MODEL* aModel, std::vector<DS_DATA_ITEM*>& aItemsList ) const
{
    LOCALE_IO   toggle;     // switch on/off the locale "C" notation

    m_out->Print( "(kicad_wks (version %d) (generator \"pl_editor\") (generator_version %s)",
                  SEXPR_WORKSHEET_FILE_VERSION,
                  m_out->Quotew( GetMajorMinorVersion() ).c_str() );

    for( DS_DATA_ITEM* item : aItemsList )
        Format( aModel, item );

    m_out->Print( ")" );
}


void DS_DATA_MODEL_IO::Format( DS_DATA_MODEL* aModel, DS_DATA_ITEM* aItem ) const
{
    switch( aItem->GetType() )
    {
    case DS_DATA_ITEM::DS_TEXT:
        format( (DS_DATA_ITEM_TEXT*) aItem );
        break;

    case DS_DATA_ITEM::DS_SEGMENT:
    case DS_DATA_ITEM::DS_RECT:
        format( aModel, aItem );
        break;

    case DS_DATA_ITEM::DS_POLYPOLYGON:
        format( (DS_DATA_ITEM_POLYGONS*) aItem );
        break;

    case DS_DATA_ITEM::DS_BITMAP:
        format( (DS_DATA_ITEM_BITMAP*) aItem );
        break;

    default:
        wxFAIL_MSG( wxT( "Cannot format item" ) );
    }
}


void DS_DATA_MODEL_IO::Format( DS_DATA_MODEL* aSheet ) const
{
    LOCALE_IO   toggle;     // switch on/off the locale "C" notation

    m_out->Print( "(kicad_wks (version %d) (generator \"pl_editor\") (generator_version %s)",
                  SEXPR_WORKSHEET_FILE_VERSION,
                  m_out->Quotew( GetMajorMinorVersion() ).c_str() );

    // Setup

    // Write default values:
    m_out->Print( "(setup" );
    m_out->Print( "(textsize %s %s)",
                  FormatDouble2Str( aSheet->m_DefaultTextSize.x ).c_str(),
                  FormatDouble2Str( aSheet->m_DefaultTextSize.y ).c_str() );
    m_out->Print( "(linewidth %s)", FormatDouble2Str( aSheet->m_DefaultLineWidth ).c_str() );
    m_out->Print( "(textlinewidth %s)",
                  FormatDouble2Str( aSheet->m_DefaultTextThickness ).c_str() );

    // Write margin values
    m_out->Print( "(left_margin %s)", FormatDouble2Str( aSheet->GetLeftMargin() ).c_str() );
    m_out->Print( "(right_margin %s)", FormatDouble2Str( aSheet->GetRightMargin() ).c_str() );
    m_out->Print( "(top_margin %s)", FormatDouble2Str( aSheet->GetTopMargin() ).c_str() );
    m_out->Print( "(bottom_margin %s)", FormatDouble2Str( aSheet->GetBottomMargin() ).c_str() );

    m_out->Print( ")" );

    // Save the graphical items on the drawing sheet
    for( unsigned ii = 0; ii < aSheet->GetCount(); ii++ )
    {
        DS_DATA_ITEM* item = aSheet->GetItem( ii );
        Format( aSheet, item );
    }

    m_out->Print( ")" );
}


void DS_DATA_MODEL_IO::format( DS_DATA_ITEM_TEXT* aItem ) const
{
    m_out->Print( "(tbtext %s", m_out->Quotew( aItem->m_TextBase ).c_str() );
    m_out->Print( "(name %s)", m_out->Quotew( aItem->m_Name ).c_str() );

    formatCoordinate( getTokenName( T_pos ), aItem->m_Pos );
    formatOptions( aItem );

    if( aItem->m_Orient )
        m_out->Print( "(rotate %s)", FormatDouble2Str( aItem->m_Orient ).c_str() );

    // Write font info, only if it is not the default setup
    bool write_size = aItem->m_TextSize.x != 0.0 || aItem->m_TextSize.y != 0.0;
    bool write_thickness = aItem->m_LineWidth != 0.0;
    bool write_face = aItem->m_Font && !aItem->m_Font->GetName().IsEmpty();

    if( write_thickness || write_size || aItem->m_Bold || aItem->m_Italic
        || write_face || aItem->m_TextColor != COLOR4D::UNSPECIFIED )
    {
        m_out->Print( "(font" );

        if( write_face )
            m_out->Print( "(face %s)", m_out->Quotew( aItem->m_Font->NameAsToken() ).c_str() );

        if( write_thickness )
            m_out->Print( "(linewidth %s)", FormatDouble2Str( aItem->m_LineWidth ).c_str() );

        if( write_size )
        {
            m_out->Print( "(size %s %s)",
                          FormatDouble2Str( aItem->m_TextSize.x ).c_str(),
                          FormatDouble2Str( aItem->m_TextSize.y ).c_str() );
        }

        if( aItem->m_Bold )
            m_out->Print( " bold" );

        if( aItem->m_Italic )
            m_out->Print( " italic" );

        if( aItem->m_TextColor != COLOR4D::UNSPECIFIED )
        {
            m_out->Print( "(color %d %d %d %s)",
                          KiROUND( aItem->m_TextColor.r * 255.0 ),
                          KiROUND( aItem->m_TextColor.g * 255.0 ),
                          KiROUND( aItem->m_TextColor.b * 255.0 ),
                          FormatDouble2Str( aItem->m_TextColor.a ).c_str() );
        }

        m_out->Print( ")" );
    }

    // Write text justification
    if( aItem->m_Hjustify != GR_TEXT_H_ALIGN_LEFT || aItem->m_Vjustify != GR_TEXT_V_ALIGN_CENTER )
    {
        m_out->Print( "(justify" );

        // Write T_center opt first, because it is
        // also a center for both m_Hjustify and m_Vjustify
        if( aItem->m_Hjustify == GR_TEXT_H_ALIGN_CENTER )
            m_out->Print( " center" );
        else if( aItem->m_Hjustify == GR_TEXT_H_ALIGN_RIGHT )
            m_out->Print( " right" );

        if( aItem->m_Vjustify == GR_TEXT_V_ALIGN_TOP )
            m_out->Print( " top" );
        else if( aItem->m_Vjustify == GR_TEXT_V_ALIGN_BOTTOM )
            m_out->Print( " bottom" );

        m_out->Print( ")" );
    }

    // write constraints
    if( aItem->m_BoundingBoxSize.x )
        m_out->Print( "(maxlen %s)", FormatDouble2Str( aItem->m_BoundingBoxSize.x ).c_str() );

    if( aItem->m_BoundingBoxSize.y )
        m_out->Print( "(maxheight %s)", FormatDouble2Str(aItem->m_BoundingBoxSize.y ).c_str() );

    formatRepeatParameters( aItem );

    if( !aItem->m_Info.IsEmpty() )
        m_out->Print( "(comment %s)", m_out->Quotew( aItem->m_Info ).c_str() );

    m_out->Print( ")" );
}


void DS_DATA_MODEL_IO::format( DS_DATA_MODEL* aModel, DS_DATA_ITEM* aItem ) const
{
    if( aItem->GetType() == DS_DATA_ITEM::DS_RECT )
        m_out->Print( "(rect" );
    else
        m_out->Print( "(line" );

    m_out->Print( "(name %s)", m_out->Quotew( aItem->m_Name ).c_str() );

    formatCoordinate( getTokenName( T_start ), aItem->m_Pos );
    formatCoordinate( getTokenName( T_end ), aItem->m_End );
    formatOptions( aItem );

    if( aItem->m_LineWidth && aItem->m_LineWidth != aModel->m_DefaultLineWidth )
        m_out->Print( "(linewidth %s)", FormatDouble2Str( aItem->m_LineWidth ).c_str() );

    formatRepeatParameters( aItem );

    if( !aItem->m_Info.IsEmpty() )
        m_out->Print( "(comment %s)", m_out->Quotew( aItem->m_Info ).c_str() );

    m_out->Print( ")" );
}


void DS_DATA_MODEL_IO::format( DS_DATA_ITEM_POLYGONS* aItem ) const
{
    m_out->Print( "(polygon" );
    m_out->Print( "(name %s)", m_out->Quotew( aItem->m_Name ).c_str() );
    formatCoordinate( "pos", aItem->m_Pos );
    formatOptions( aItem );

    formatRepeatParameters( aItem );

    if( !aItem->m_Orient.IsZero() )
        m_out->Print( "(rotate %s)", FormatDouble2Str( aItem->m_Orient.AsDegrees() ).c_str() );

    if( aItem->m_LineWidth )
        m_out->Print( "(linewidth %s)", FormatDouble2Str( aItem->m_LineWidth ).c_str() );

    if( !aItem->m_Info.IsEmpty() )
        m_out->Print( "(comment %s)", m_out->Quotew( aItem->m_Info ).c_str() );

    // Write polygon corners list
    for( int kk = 0; kk < aItem->GetPolyCount(); kk++ )
    {
        m_out->Print( "(pts" );

        // Create current polygon corners list
        unsigned ist = aItem->GetPolyIndexStart( kk );
        unsigned iend = aItem->GetPolyIndexEnd( kk );

        while( ist <= iend )
        {
            VECTOR2D pos = aItem->m_Corners[ist++];
            m_out->Print( "(xy %s %s)",
                          FormatDouble2Str( pos.x ).c_str(),
                          FormatDouble2Str( pos.y ).c_str() );
        }

        m_out->Print( ")" );
    }

    m_out->Print( ")" );
}


void DS_DATA_MODEL_IO::format( DS_DATA_ITEM_BITMAP* aItem ) const
{
    // Don't save empty images
    if( !aItem->m_ImageBitmap->GetOriginalImageData() )
        return;

    m_out->Print( "(bitmap" );
    m_out->Print( "(name %s)", m_out->Quotew( aItem->m_Name ).c_str() );
    formatCoordinate( "pos", aItem->m_Pos );
    formatOptions( aItem );

    m_out->Print( "(scale %s)", FormatDouble2Str( aItem->m_ImageBitmap->GetScale() ).c_str() );

    formatRepeatParameters( aItem );

    if( !aItem->m_Info.IsEmpty() )
        m_out->Print( "(comment %s)", m_out->Quotew( aItem->m_Info ).c_str() );

    // Write image in png readable format
    m_out->Print( "(data" );

    wxString out = wxBase64Encode( aItem->m_ImageBitmap->GetImageDataBuffer() );

    // Apparently the MIME standard character width for base64 encoding is 76 (unconfirmed)
    // so use it in a vain attempt to be standard like.
#define MIME_BASE64_LENGTH 76

    size_t first = 0;

    while( first < out.Length() )
    {
        m_out->Print( "\n\"%s\"", TO_UTF8( out( first, MIME_BASE64_LENGTH ) ) );
        first += MIME_BASE64_LENGTH;
    }

    m_out->Print( ")" );  // Closes data token.
    m_out->Print( ")" );  // Closes bitmap token.
}


void DS_DATA_MODEL_IO::formatCoordinate( const char * aToken, POINT_COORD & aCoord ) const
{
    m_out->Print( "(%s %s %s", aToken,
                  FormatDouble2Str( aCoord.m_Pos.x ).c_str(),
                  FormatDouble2Str( aCoord.m_Pos.y ).c_str() );

    switch( aCoord.m_Anchor )
    {
    case RB_CORNER: break;
    case LT_CORNER: m_out->Print( " ltcorner" ); break;
    case LB_CORNER: m_out->Print( " lbcorner" ); break;
    case RT_CORNER: m_out->Print( " rtcorner" ); break;
    }

    m_out->Print( ")" );
}


void DS_DATA_MODEL_IO::formatRepeatParameters( DS_DATA_ITEM* aItem ) const
{
    if( aItem->m_RepeatCount <= 1 )
        return;

    m_out->Print( "(repeat %d)", aItem->m_RepeatCount );

    if( aItem->m_IncrementVector.x )
        m_out->Print( "(incrx %s)", FormatDouble2Str( aItem->m_IncrementVector.x ).c_str() );

    if( aItem->m_IncrementVector.y )
        m_out->Print( "(incry %s)", FormatDouble2Str( aItem->m_IncrementVector.y ).c_str() );

    if( aItem->m_IncrementLabel != 1 && aItem->GetType() == DS_DATA_ITEM::DS_TEXT )
        m_out->Print( "(incrlabel %d)", aItem->m_IncrementLabel );
}


void DS_DATA_MODEL_IO::formatOptions( DS_DATA_ITEM* aItem ) const
{
    if( aItem->GetPage1Option() == FIRST_PAGE_ONLY )
        m_out->Print( "(option page1only)" );
    else if( aItem->GetPage1Option() == SUBSEQUENT_PAGES )
        m_out->Print( "(option notonpage1)" );
}