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 * 
 * Licensed to the Apache Software Foundation (ASF) under one
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 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_linguistic.hxx"
#include <i18npool/lang.h>
#include <tools/debug.hxx>
#include <svl/lngmisc.hxx>

#include <cppuhelper/factory.hxx>	// helper for factories
#include <com/sun/star/registry/XRegistryKey.hpp>
#include <com/sun/star/beans/XPropertySet.hpp>
#include <unotools/processfactory.hxx>
#include <osl/mutex.hxx>

#include "thesdsp.hxx"
#include "linguistic/lngprops.hxx"

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

///////////////////////////////////////////////////////////////////////////

static sal_Bool SvcListHasLanguage( 
        const Sequence< Reference< XThesaurus > > &rRefs, 
        const Locale &rLocale )
{
    sal_Bool bHasLanguage = sal_False;
    
    const Reference< XThesaurus > *pRef = rRefs.getConstArray();
    sal_Int32 nLen = rRefs.getLength();
    for (sal_Int32 k = 0;  k < nLen  &&  !bHasLanguage;  ++k)
    {
        if (pRef[k].is())
            bHasLanguage = pRef[k]->hasLocale( rLocale );
    }
    
    return bHasLanguage;
}

///////////////////////////////////////////////////////////////////////////


ThesaurusDispatcher::ThesaurusDispatcher()
{
}


ThesaurusDispatcher::~ThesaurusDispatcher()
{
	ClearSvcList();
}


void ThesaurusDispatcher::ClearSvcList()
{
	// release memory for each table entry
    ThesSvcByLangMap_t aTmp;
    aSvcMap.swap( aTmp );
}


Sequence< Locale > SAL_CALL
	ThesaurusDispatcher::getLocales()
		throw(RuntimeException)
{
	MutexGuard	aGuard( GetLinguMutex() );

    Sequence< Locale > aLocales( static_cast< sal_Int32 >(aSvcMap.size()) );
    Locale *pLocales = aLocales.getArray();
    ThesSvcByLangMap_t::const_iterator aIt;
    for (aIt = aSvcMap.begin();  aIt != aSvcMap.end();  ++aIt)
    {
        *pLocales++ = CreateLocale( aIt->first );
    }    
    return aLocales;
}


sal_Bool SAL_CALL
    ThesaurusDispatcher::hasLocale( const Locale& rLocale )
		throw(RuntimeException)
{
	MutexGuard	aGuard( GetLinguMutex() );
    ThesSvcByLangMap_t::const_iterator aIt( aSvcMap.find( LocaleToLanguage( rLocale ) ) );
    return aIt != aSvcMap.end();
}


Sequence< Reference< XMeaning > > SAL_CALL
	ThesaurusDispatcher::queryMeanings(
			const OUString& rTerm, const Locale& rLocale,
			const PropertyValues& rProperties )
		throw(IllegalArgumentException, RuntimeException)
{
	MutexGuard	aGuard( GetLinguMutex() );

	Sequence< Reference< XMeaning > >	aMeanings;

	sal_Int16 nLanguage = LocaleToLanguage( rLocale );
	if (nLanguage == LANGUAGE_NONE  || !rTerm.getLength())
		return aMeanings;

	// search for entry with that language
    ThesSvcByLangMap_t::iterator    aIt( aSvcMap.find( nLanguage ) );
    LangSvcEntries_Thes     *pEntry = aIt != aSvcMap.end() ? aIt->second.get() : NULL;

	if (!pEntry)
	{
#ifdef LINGU_EXCEPTIONS
		throw IllegalArgumentException();
#endif
	}
	else
	{
		OUString aChkWord( rTerm );
        aChkWord = aChkWord.replace( SVT_HARD_SPACE, ' ' );
		RemoveHyphens( aChkWord );
		if (IsIgnoreControlChars( rProperties, GetPropSet() ))
			RemoveControlChars( aChkWord );

		sal_Int32 nLen = pEntry->aSvcRefs.getLength();
		DBG_ASSERT( nLen == pEntry->aSvcImplNames.getLength(),
				"lng : sequence length mismatch");
        DBG_ASSERT( pEntry->nLastTriedSvcIndex < nLen,
				"lng : index out of range");

		sal_Int32 i = 0;

		// try already instantiated services first
		{
			const Reference< XThesaurus > *pRef = pEntry->aSvcRefs.getConstArray();
            while (i <= pEntry->nLastTriedSvcIndex
				   &&  aMeanings.getLength() == 0)
			{
                if (pRef[i].is()  &&  pRef[i]->hasLocale( rLocale ))
					aMeanings = pRef[i]->queryMeanings( aChkWord, rLocale, rProperties );
				++i;
			}
		}

		// if still no result instantiate new services and try those
		if (aMeanings.getLength() == 0
            &&  pEntry->nLastTriedSvcIndex < nLen - 1)
		{
			const OUString *pImplNames = pEntry->aSvcImplNames.getConstArray();
			Reference< XThesaurus > *pRef = pEntry->aSvcRefs.getArray();

			Reference< XMultiServiceFactory >  xMgr( getProcessServiceFactory() );
			if (xMgr.is())
			{
				// build service initialization argument
				Sequence< Any > aArgs(1);
				aArgs.getArray()[0] <<= GetPropSet();

				while (i < nLen  &&  aMeanings.getLength() == 0)
				{
					// create specific service via it's implementation name
					Reference< XThesaurus > xThes;
					try
					{
						xThes = Reference< XThesaurus >(
								xMgr->createInstanceWithArguments(
								pImplNames[i], aArgs ), UNO_QUERY );
					}
					catch (uno::Exception &)
					{
                        DBG_ASSERT( 0, "createInstanceWithArguments failed" );
					}
					pRef[i] = xThes;

                    if (xThes.is()  &&  xThes->hasLocale( rLocale ))
						aMeanings = xThes->queryMeanings( aChkWord, rLocale, rProperties );

                    pEntry->nLastTriedSvcIndex = (sal_Int16) i;
					++i;
				}
                
                // if language is not supported by any of the services
                // remove it from the list.
                if (i == nLen  &&  aMeanings.getLength() == 0)
                {
                    if (!SvcListHasLanguage( pEntry->aSvcRefs, rLocale ))
                        aSvcMap.erase( nLanguage );
                }
			}
		}
	}

	return aMeanings;
}


void ThesaurusDispatcher::SetServiceList( const Locale &rLocale,
		const Sequence< OUString > &rSvcImplNames )
{
	MutexGuard	aGuard( GetLinguMutex() );

	sal_Int16 nLanguage = LocaleToLanguage( rLocale );

    sal_Int32 nLen = rSvcImplNames.getLength();
    if (0 == nLen)
        // remove entry
        aSvcMap.erase( nLanguage );
    else
    {
        // modify/add entry
        LangSvcEntries_Thes *pEntry = aSvcMap[ nLanguage ].get();
        if (pEntry)
        {
            pEntry->Clear();
            pEntry->aSvcImplNames = rSvcImplNames;
            pEntry->aSvcRefs = Sequence< Reference < XThesaurus > >( nLen );
        }
        else
        {
            boost::shared_ptr< LangSvcEntries_Thes > pTmpEntry( new LangSvcEntries_Thes( rSvcImplNames ) );
            pTmpEntry->aSvcRefs = Sequence< Reference < XThesaurus > >( nLen );
            aSvcMap[ nLanguage ] = pTmpEntry;
        }
    }
}


Sequence< OUString >
	ThesaurusDispatcher::GetServiceList( const Locale &rLocale ) const
{
	MutexGuard	aGuard( GetLinguMutex() );

	Sequence< OUString > aRes;

	// search for entry with that language and use data from that
	sal_Int16 nLanguage = LocaleToLanguage( rLocale );
    ThesaurusDispatcher             *pThis = (ThesaurusDispatcher *) this;
    const ThesSvcByLangMap_t::iterator  aIt( pThis->aSvcMap.find( nLanguage ) );
    const LangSvcEntries_Thes       *pEntry = aIt != aSvcMap.end() ? aIt->second.get() : NULL;
	if (pEntry)
		aRes = pEntry->aSvcImplNames;

	return aRes;
}


LinguDispatcher::DspType ThesaurusDispatcher::GetDspType() const
{
	return DSP_THES;
}


///////////////////////////////////////////////////////////////////////////