/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <tools/debug.hxx>
#include <i18nlangtag/languagetag.hxx>
#include <tools/stream.hxx>
#include <osl/mutex.hxx>
#include <ucbhelper/content.hxx>

#include <cppuhelper/factory.hxx>
#include <com/sun/star/linguistic2/XConversionDictionary.hpp>
#include <com/sun/star/linguistic2/ConversionDictionaryType.hpp>
#include <com/sun/star/linguistic2/ConversionPropertyType.hpp>
#include <com/sun/star/util/XFlushable.hpp>
#include <com/sun/star/lang/Locale.hpp>
#include <com/sun/star/lang/EventObject.hpp>
#include <com/sun/star/uno/Reference.h>
#include <com/sun/star/registry/XRegistryKey.hpp>
#include <com/sun/star/util/XFlushListener.hpp>
#include <com/sun/star/io/XActiveDataSource.hpp>
#include <com/sun/star/document/XFilter.hpp>
#include <com/sun/star/beans/PropertyValue.hpp>
#include <xmloff/nmspmap.hxx>
#include <xmloff/xmlnmspe.hxx>
#include <unotools/streamwrap.hxx>

#include "convdic.hxx"
#include "convdicxml.hxx"
#include "linguistic/misc.hxx"
#include "defs.hxx"

using namespace std;
using namespace utl;
using namespace osl;
using namespace com::sun::star;
using namespace com::sun::star::lang;
using namespace com::sun::star::uno;
using namespace com::sun::star::linguistic2;
using namespace linguistic;


#define XML_NAMESPACE_TCD_STRING        "http://openoffice.org/2003/text-conversion-dictionary"
#define CONV_TYPE_HANGUL_HANJA          "Hangul / Hanja"
#define CONV_TYPE_SCHINESE_TCHINESE     "Chinese simplified / Chinese traditional"


static const OUString ConversionTypeToText( sal_Int16 nConversionType )
{
    OUString aRes;
    if (nConversionType == ConversionDictionaryType::HANGUL_HANJA)
        aRes = CONV_TYPE_HANGUL_HANJA;
    else if (nConversionType == ConversionDictionaryType::SCHINESE_TCHINESE)
        aRes = CONV_TYPE_SCHINESE_TCHINESE;
    return aRes;
}

static sal_Int16 GetConversionTypeFromText( const OUString &rText )
{
    sal_Int16 nRes = -1;
    if (rText == CONV_TYPE_HANGUL_HANJA)
        nRes = ConversionDictionaryType::HANGUL_HANJA;
    else if (rText == CONV_TYPE_SCHINESE_TCHINESE)
        nRes = ConversionDictionaryType::SCHINESE_TCHINESE;
    return nRes;
}


class ConvDicXMLImportContext :
    public SvXMLImportContext
{
public:
    ConvDicXMLImportContext(
            ConvDicXMLImport &rImport,
            sal_uInt16 nPrfx, const OUString& rLName ) :
        SvXMLImportContext( rImport, nPrfx, rLName )
    {
    }

    ConvDicXMLImport & GetConvDicImport()
    {
        return static_cast<ConvDicXMLImport &>(GetImport());
    }

    // SvXMLImportContext
    virtual void Characters( const OUString &rChars ) override;
    virtual SvXMLImportContext * CreateChildContext( sal_uInt16 nPrefix, const OUString& rLocalName, const uno::Reference< xml::sax::XAttributeList > &rxAttrList) override;
};


class ConvDicXMLDictionaryContext_Impl :
    public ConvDicXMLImportContext
{
    sal_Int16       nLanguage;
    sal_Int16   nConversionType;

public:
    ConvDicXMLDictionaryContext_Impl( ConvDicXMLImport &rImport,
            sal_uInt16 nPrefix, const OUString& rLName) :
        ConvDicXMLImportContext( rImport, nPrefix, rLName )
    {
        nLanguage = LANGUAGE_NONE;
        nConversionType = -1;
    }

    // SvXMLImportContext
    virtual void StartElement( const css::uno::Reference< css::xml::sax::XAttributeList >& xAttrList ) override;
    virtual SvXMLImportContext * CreateChildContext( sal_uInt16 nPrefix, const OUString& rLocalName, const uno::Reference< xml::sax::XAttributeList > &rxAttrList ) override;
};


class ConvDicXMLEntryTextContext_Impl :
    public ConvDicXMLImportContext
{
    OUString    aLeftText;
    sal_Int16   nPropertyType;  // used for Chinese simplified/traditional conversion

public:
    ConvDicXMLEntryTextContext_Impl(
            ConvDicXMLImport &rImport,
            sal_uInt16 nPrefix, const OUString& rLName ) :
        ConvDicXMLImportContext( rImport, nPrefix, rLName ),
        nPropertyType( ConversionPropertyType::NOT_DEFINED )
    {
    }

    // SvXMLImportContext
    virtual void StartElement( const css::uno::Reference< css::xml::sax::XAttributeList >& xAttrList ) override;
    virtual SvXMLImportContext * CreateChildContext( sal_uInt16 nPrefix, const OUString& rLocalName, const uno::Reference< xml::sax::XAttributeList > &rxAttrList ) override;

    const OUString &    GetLeftText() const { return aLeftText; }
};


class ConvDicXMLRightTextContext_Impl :
    public ConvDicXMLImportContext
{
    OUString aRightText;
    ConvDicXMLEntryTextContext_Impl &rEntryContext;

public:
    ConvDicXMLRightTextContext_Impl(
            ConvDicXMLImport &rImport,
            sal_uInt16 nPrefix, const OUString& rLName,
            ConvDicXMLEntryTextContext_Impl &rParentContext ) :
        ConvDicXMLImportContext( rImport, nPrefix, rLName ),
        rEntryContext( rParentContext )
    {
    }

    // SvXMLImportContext
    virtual void EndElement() override;
    virtual SvXMLImportContext * CreateChildContext( sal_uInt16 nPrefix, const OUString& rLocalName, const uno::Reference< xml::sax::XAttributeList > &rxAttrList ) override;
    virtual void Characters( const OUString &rChars ) override;

    const OUString &    GetRightText() const    { return aRightText; }
    const OUString &    GetLeftText() const     { return rEntryContext.GetLeftText(); }
    ConvDic *           GetDic()                { return GetConvDicImport().GetDic(); }
};


void ConvDicXMLImportContext::Characters(const OUString & /*rChars*/)
{
    /*
    Whitespace occurring within the content of token elements is "trimmed"
    from the ends (i.e. all whitespace at the beginning and end of the
    content is removed), and "collapsed" internally (i.e. each sequence of
    1 or more whitespace characters is replaced with one blank character).
    */
    //collapsing not done yet!

}

SvXMLImportContext * ConvDicXMLImportContext::CreateChildContext(
        sal_uInt16 nPrefix, const OUString& rLocalName,
        const uno::Reference< xml::sax::XAttributeList > & /*rxAttrList*/ )
{
    SvXMLImportContext *pContext = nullptr;
    if ( nPrefix == XML_NAMESPACE_TCD && rLocalName == "text-conversion-dictionary" )
        pContext = new ConvDicXMLDictionaryContext_Impl( GetConvDicImport(), nPrefix, rLocalName );
    else
        pContext = new SvXMLImportContext( GetImport(), nPrefix, rLocalName );
    return pContext;
}


void ConvDicXMLDictionaryContext_Impl::StartElement(
    const uno::Reference< xml::sax::XAttributeList > &rxAttrList )
{
    sal_Int16 nAttrCount = rxAttrList.is() ? rxAttrList->getLength() : 0;
    for (sal_Int16 i = 0;  i < nAttrCount;  ++i)
    {
        OUString aAttrName = rxAttrList->getNameByIndex(i);
        OUString aLocalName;
        sal_uInt16 nPrefix = GetImport().GetNamespaceMap().
                                    GetKeyByAttrName( aAttrName, &aLocalName );
        OUString aValue = rxAttrList->getValueByIndex(i);

        if ( nPrefix == XML_NAMESPACE_TCD && aLocalName == "lang" )
            nLanguage = LanguageTag::convertToLanguageType( aValue );
        else if ( nPrefix == XML_NAMESPACE_TCD && aLocalName == "conversion-type" )
            nConversionType = GetConversionTypeFromText( aValue );
    }
    GetConvDicImport().SetLanguage( nLanguage );
    GetConvDicImport().SetConversionType( nConversionType );

}

SvXMLImportContext * ConvDicXMLDictionaryContext_Impl::CreateChildContext(
        sal_uInt16 nPrefix, const OUString& rLocalName,
        const uno::Reference< xml::sax::XAttributeList > & /*rxAttrList*/ )
{
    SvXMLImportContext *pContext = nullptr;
    if ( nPrefix == XML_NAMESPACE_TCD && rLocalName == "entry" )
        pContext = new ConvDicXMLEntryTextContext_Impl( GetConvDicImport(), nPrefix, rLocalName );
    else
        pContext = new SvXMLImportContext( GetImport(), nPrefix, rLocalName );
    return pContext;
}


SvXMLImportContext * ConvDicXMLEntryTextContext_Impl::CreateChildContext(
        sal_uInt16 nPrefix, const OUString& rLocalName,
        const uno::Reference< xml::sax::XAttributeList > & /*rxAttrList*/ )
{
    SvXMLImportContext *pContext = nullptr;
    if ( nPrefix == XML_NAMESPACE_TCD && rLocalName == "right-text" )
        pContext = new ConvDicXMLRightTextContext_Impl( GetConvDicImport(), nPrefix, rLocalName, *this );
    else
        pContext = new SvXMLImportContext( GetImport(), nPrefix, rLocalName );
    return pContext;
}

void ConvDicXMLEntryTextContext_Impl::StartElement(
        const uno::Reference< xml::sax::XAttributeList >& rxAttrList )
{
    sal_Int16 nAttrCount = rxAttrList.is() ? rxAttrList->getLength() : 0;
    for (sal_Int16 i = 0;  i < nAttrCount;  ++i)
    {
        OUString aAttrName = rxAttrList->getNameByIndex(i);
        OUString aLocalName;
        sal_uInt16 nPrefix = GetImport().GetNamespaceMap().
                                    GetKeyByAttrName( aAttrName, &aLocalName );
        OUString aValue = rxAttrList->getValueByIndex(i);

        if ( nPrefix == XML_NAMESPACE_TCD && aLocalName == "left-text" )
            aLeftText = aValue;
        if ( nPrefix == XML_NAMESPACE_TCD && aLocalName == "property-type" )
            nPropertyType = (sal_Int16) aValue.toInt32();
    }
}


SvXMLImportContext * ConvDicXMLRightTextContext_Impl::CreateChildContext(
        sal_uInt16 nPrefix, const OUString& rLocalName,
        const uno::Reference< xml::sax::XAttributeList > & /*rxAttrList*/ )
{
    // leaf: return default (empty) context
    SvXMLImportContext *pContext = new SvXMLImportContext( GetImport(), nPrefix, rLocalName );
    return pContext;
}

void ConvDicXMLRightTextContext_Impl::Characters( const OUString &rChars )
{
    aRightText += rChars;
}

void ConvDicXMLRightTextContext_Impl::EndElement()
{
    ConvDic *pDic = GetDic();
    if (pDic)
        pDic->AddEntry( GetLeftText(), GetRightText() );
}


bool ConvDicXMLExport::Export()
{
    uno::Reference< document::XExporter > xExporter( this );
    uno::Reference< document::XFilter > xFilter( xExporter, UNO_QUERY );
    uno::Sequence< beans::PropertyValue > aProps(0);
    xFilter->filter( aProps );      // calls exportDoc implicitly

    return bSuccess;
}


sal_uInt32 ConvDicXMLExport::exportDoc( enum ::xmloff::token::XMLTokenEnum /*eClass*/ )
{
    GetNamespaceMap_().Add( "tcd",
            XML_NAMESPACE_TCD_STRING, XML_NAMESPACE_TCD );

    GetDocHandler()->startDocument();

    // Add xmlns line and some other arguments
    AddAttribute( GetNamespaceMap_().GetAttrNameByKey( XML_NAMESPACE_TCD ),
                  GetNamespaceMap_().GetNameByKey( XML_NAMESPACE_TCD ) );
    AddAttributeASCII( XML_NAMESPACE_TCD, "package", "org.openoffice.Office" );

    OUString aIsoLang( LanguageTag::convertToBcp47( rDic.nLanguage ) );
    AddAttribute( XML_NAMESPACE_TCD, "lang", aIsoLang );
    OUString aConvType( ConversionTypeToText( rDic.nConversionType ) );
    AddAttribute( XML_NAMESPACE_TCD, "conversion-type", aConvType );

    //!! block necessary in order to have SvXMLElementExport d-tor called
    //!! before the call to endDocument
    {
        SvXMLElementExport aRoot( *this, XML_NAMESPACE_TCD, "text-conversion-dictionary", true, true );
        ExportContent_();
    }

    GetDocHandler()->endDocument();

    bSuccess = true;
    return 0;
}


void ConvDicXMLExport::ExportContent_()
{
    // acquire sorted list of all keys
    ConvMapKeySet   aKeySet;
    ConvMap::iterator aIt;
    for (aIt = rDic.aFromLeft.begin();  aIt != rDic.aFromLeft.end();  ++aIt)
        aKeySet.insert( (*aIt).first );

    ConvMapKeySet::iterator aKeyIt;
    for (aKeyIt = aKeySet.begin();  aKeyIt != aKeySet.end();  ++aKeyIt)
    {
        OUString aLeftText( *aKeyIt );
        AddAttribute( XML_NAMESPACE_TCD, "left-text", aLeftText );
        if (rDic.pConvPropType.get())   // property-type list available?
        {
            sal_Int16 nPropertyType = -1;
            PropTypeMap::iterator aIt2 = rDic.pConvPropType->find( aLeftText );
            if (aIt2 != rDic.pConvPropType->end())
                nPropertyType = (*aIt2).second;
            DBG_ASSERT( nPropertyType, "property-type not found" );
            if (nPropertyType == -1)
                nPropertyType = ConversionPropertyType::NOT_DEFINED;
            AddAttribute( XML_NAMESPACE_TCD, "property-type", OUString::number(  nPropertyType ) );
        }
        SvXMLElementExport aEntryMain( *this, XML_NAMESPACE_TCD,
                "entry" , true, true );

        pair< ConvMap::iterator, ConvMap::iterator > aRange =
                rDic.aFromLeft.equal_range( *aKeyIt );
        for (aIt = aRange.first;  aIt != aRange.second;  ++aIt)
        {
            DBG_ASSERT( *aKeyIt == (*aIt).first, "key <-> entry mismatch" );
            OUString aRightText( (*aIt).second );
            SvXMLElementExport aEntryRightText( *this, XML_NAMESPACE_TCD,
                    "right-text" , true, false );
            Characters( aRightText );
        }
    }
}

void SAL_CALL ConvDicXMLImport::startDocument()
    throw( xml::sax::SAXException, uno::RuntimeException, std::exception )
{
    // register namespace at first possible opportunity
    GetNamespaceMap().Add( "tcd",
            XML_NAMESPACE_TCD_STRING, XML_NAMESPACE_TCD );
    SvXMLImport::startDocument();
}

SvXMLImportContext * ConvDicXMLImport::CreateContext(
        sal_uInt16 nPrefix,
        const OUString &rLocalName,
        const uno::Reference < xml::sax::XAttributeList > & /*rxAttrList*/ )
{
    SvXMLImportContext *pContext = nullptr;
    if ( nPrefix == XML_NAMESPACE_TCD && rLocalName == "text-conversion-dictionary" )
        pContext = new ConvDicXMLDictionaryContext_Impl( *this, nPrefix, rLocalName );
    else
        pContext = new SvXMLImportContext( *this, nPrefix, rLocalName );
    return pContext;
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */