/*
 * Copyright (C) Ascensio System SIA, 2009-2026
 *
 * This program is a free software product. You can redistribute it and/or
 * modify it under the terms of the GNU Affero General Public License (AGPL)
 * version 3 as published by the Free Software Foundation, together with the
 * additional terms provided in the LICENSE file.
 *
 * This program is distributed WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
 * details, see the GNU AGPL at: https://www.gnu.org/licenses/agpl-3.0.html
 *
 * You can contact Ascensio System SIA by email at info@onlyoffice.com
 * or by postal mail at 20A-6 Ernesta Birznieka-Upisha Street, Riga,
 * LV-1050, Latvia, European Union.
 *
 * The interactive user interfaces in modified versions of the Program
 * are required to display Appropriate Legal Notices in accordance with
 * Section 5 of the GNU AGPL version 3.
 *
 * No trademark rights are granted under this License.
 *
 * All non-code elements of the Product, including illustrations,
 * icon sets, and technical writing content, are licensed under the
 * Creative Commons Attribution-ShareAlike 4.0 International License:
 * https://creativecommons.org/licenses/by-sa/4.0/legalcode
 *
 * This license applies only to such non-code elements and does not
 * modify or replace the licensing terms applicable to the Program's
 * source code, which remains licensed under the GNU Affero General
 * Public License v3.
 *
 * SPDX-License-Identifier: AGPL-3.0-only
 */

#include "math_elements.h"
#include "../Converter/StarMath2OOXML/shakey.h"
#include "../Converter/StarMath2OOXML/conversionmathformula.h"

namespace cpdoccore { 

	using namespace odf_types;

namespace odf_reader {

//---------------------------------------------------------------
const wchar_t * office_math_element::ns = L"math";
const wchar_t * office_math_element::name = L"math-element";
//---------------------------------------------------------------
const wchar_t * office_math::ns = L"math";
const wchar_t * office_math::name = L"math";

//----------------------------------------------------------------------------------------------------

void office_math::add_attributes( const xml::attributes_wc_ptr & Attributes )
{

}

void office_math::add_child_element( xml::sax * Reader, const std::wstring & Ns, const std::wstring & Name)
{
    if CP_CHECK_NAME1(L"semantics")
    {
        CP_CREATE_ELEMENT(semantics_);
    }
}


void office_math::oox_convert(oox::math_context & Context, int iTypeConversion)
{
	if (semantics_)
	{
		office_math_element* math_element = dynamic_cast<office_math_element*>(semantics_.get());
		math_element->oox_convert(Context,iTypeConversion);
	}
}

//----------------------------------------------------------------------------------------------------
const wchar_t * math_semantics::ns = L"math";
const wchar_t * math_semantics::name = L"semantics";
//----------------------------------------------------------------------------------------------------

void math_semantics::add_attributes( const xml::attributes_wc_ptr & Attributes )
{
}

void math_semantics::add_child_element( xml::sax * Reader, const std::wstring & Ns, const std::wstring & Name)
{
    if CP_CHECK_NAME1(L"annotation")
    {
        CP_CREATE_ELEMENT(annotation_);
    }
    else if(CP_CHECK_NAME1(L"signature"))
        create_element_and_read(Reader,Ns,Name,signature_,getContext(),false,true);
    else
        CP_CREATE_ELEMENT(content_);

}


void math_semantics::oox_convert(oox::math_context & Context)
{
    this->oox_convert(Context,0);
}
void math_semantics::oox_convert(oox::math_context &Context, int iTypeConversion)
{
    math_signature* pSignature = dynamic_cast<math_signature*>(signature_.get());
    math_annotation* annotation = dynamic_cast<math_annotation*>(annotation_.get());
    math_annotation_xml* annotation_xml = dynamic_cast<math_annotation_xml*>(annotation_.get());

    std::wstring annotation_text(L"");
    if ((annotation) && (annotation->text_)) annotation_text = *annotation->text_;
    else if ((annotation_xml) && (annotation_xml->text_)) annotation_text = *annotation_xml->text_;
    bool result = false;
    if(pSignature)
    {
        if(pSignature->text_ && pSignature->GetAlg() == L"sha256" && HashSM::HashComparison(pSignature->GetShaKey(),HashSM::HashingAnnotation(annotation_text,true)))
        {
            Context.output_stream() << *pSignature->text_;
            result = true;
        }
    }

    if (!annotation_text.empty() && !result)
    {
        result = true;

        StarMath::CStarMathConverter oConverterStarMath;

        oConverterStarMath.SetBaseFont(Context.base_font_name_);
        oConverterStarMath.SetBaseSize(Context.base_font_size_);
        oConverterStarMath.SetBaseAlignment(Context.base_alignment_);
        oConverterStarMath.SetBaseItalic(Context.base_font_italic_);
        oConverterStarMath.SetBaseBold(Context.base_font_bold_);

		std::wstring ws_conversion_result_sm_to_ooxml = oConverterStarMath.ConvertStarMathToOOXml(annotation_text,iTypeConversion);

        std::queue<StarMath::TFormulaSize> sizes = oConverterStarMath.GetFormulaSize();

        for (;!sizes.empty(); sizes.pop())
        {
            if (sizes.front().m_iWidth > Context.width)
                Context.width = sizes.front().m_iWidth;

            Context.height += sizes.front().m_iHeight;
        }
        Context.output_stream() << ws_conversion_result_sm_to_ooxml;
    }

    if (!result)
    {
        Context.output_stream() << L"<m:oMathPara xmlns:m=\"http://schemas.openxmlformats.org/officeDocument/2006/math\">";
        Context.output_stream() << L"<m:oMath xmlns:m=\"http://schemas.openxmlformats.org/officeDocument/2006/math\">";
        for (size_t i = 0; i < content_.size(); i++)
        {
            office_math_element* math_element = dynamic_cast<office_math_element*>(content_[i].get());
            math_element->oox_convert(Context);
        }
        Context.output_stream() << L"</m:oMath>";
        Context.output_stream() << L"</m:oMathPara>";
    }
}

//----------------------------------------------------------------------------------------------------
const wchar_t * math_annotation::ns = L"math";
const wchar_t * math_annotation::name = L"annotation";
//----------------------------------------------------------------------------------------------------

void math_annotation::add_attributes( const xml::attributes_wc_ptr & Attributes )
{
// ver 2	
   CP_APPLY_ATTR(L"math:encoding", encoding_);

// ver 3
    if (!encoding_)	CP_APPLY_ATTR(L"encoding", encoding_);
	
}

void math_annotation::add_child_element( xml::sax * Reader, const std::wstring & Ns, const std::wstring & Name)
{
	CP_CREATE_ELEMENT(content_);

}

void math_annotation::add_text(const std::wstring & Text) 
{
    text_ = Text;
}

//----------------------------------------------------------------------------------------------------
const wchar_t * math_annotation_xml::ns = L"math";
const wchar_t * math_annotation_xml::name = L"annotation-xml";
//----------------------------------------------------------------------------------------------------

void math_annotation_xml::add_attributes( const xml::attributes_wc_ptr & Attributes )
{
// ver 2	
   CP_APPLY_ATTR(L"math:encoding", encoding_);

// ver 3
    if (!encoding_)	CP_APPLY_ATTR(L"encoding", encoding_);
	
}

void math_annotation_xml::add_child_element( xml::sax * Reader, const std::wstring & Ns, const std::wstring & Name)
{
	CP_CREATE_ELEMENT(content_);

}

void math_annotation_xml::add_text(const std::wstring & Text) 
{
    text_->append(Text);
}

//----------------------------------------------------------------------------------------------------

const wchar_t * math_signature::ns = L"math";
const wchar_t * math_signature::name = L"signature";
//----------------------------------------------------------------------------------------------------

std::wstring math_signature::GetAlg() const
{
	if(alg_)
		return alg_.get();
	return L"";
}

std::wstring math_signature::GetShaKey() const
{
	if(shakey_)
		return shakey_.get();
	return L"";
}

void math_signature::add_attributes( const xml::attributes_wc_ptr & Attributes )
{
   CP_APPLY_ATTR(L"encoding", encoding_);
   CP_APPLY_ATTR(L"alg", alg_);
   CP_APPLY_ATTR(L"shakey", shakey_);
}

void math_signature::add_child_element( xml::sax * Reader, const std::wstring & Ns, const std::wstring & Name)
{
	CP_CREATE_ELEMENT(content_);
}

void math_signature::add_text(const std::wstring & Text)
{
    text_ = Text;
}

}
}