/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#include <resource/sharedresources.hxx>

#include <unotools/resmgr.hxx>
#include <osl/diagnose.h>
#include <osl/mutex.hxx>
#include <sal/log.hxx>

namespace connectivity
{
    namespace {

    class SharedResources_Impl
    {
    private:
        static  SharedResources_Impl*   s_pInstance;
        static  oslInterlockedCount     s_nClients;

    private:
        std::locale                     m_aLocale;

    public:
        static void     registerClient();
        static void     revokeClient();

        static SharedResources_Impl&
                        getInstance();

        OUString getResourceString(TranslateId pId) const;

    private:
        SharedResources_Impl();

        static ::osl::Mutex& getMutex()
        {
            static ::osl::Mutex s_aMutex;
            return s_aMutex;
        }
    };

    }

    SharedResources_Impl*   SharedResources_Impl::s_pInstance( nullptr );
    oslInterlockedCount     SharedResources_Impl::s_nClients( 0 );

    SharedResources_Impl::SharedResources_Impl()
        : m_aLocale(Translate::Create("cnr"))
    {
    }

    OUString SharedResources_Impl::getResourceString(TranslateId pId) const
    {
        return Translate::get(pId, m_aLocale);
    }

    void SharedResources_Impl::registerClient()
    {
        osl_atomic_increment( &s_nClients );
    }

    void SharedResources_Impl::revokeClient()
    {
        ::osl::MutexGuard aGuard( getMutex() );
        if ( 0 == osl_atomic_decrement( &s_nClients ) )
        {
            delete s_pInstance;
            s_pInstance = nullptr;
        }
    }


    SharedResources_Impl& SharedResources_Impl::getInstance()
    {
        ::osl::MutexGuard aGuard( getMutex() );
        OSL_ENSURE( s_nClients > 0, "SharedResources_Impl::getInstance: no active clients!" );

        if ( !s_pInstance )
            s_pInstance = new SharedResources_Impl;

        return *s_pInstance;
    }

    namespace
    {
        bool lcl_substitute( OUString& _inout_rString,
            const char* _pAsciiPattern, std::u16string_view _rReplace )
        {
            OUString oldString = _inout_rString;
            OUString sPattern( OUString::createFromAscii( _pAsciiPattern ) );
            _inout_rString = _inout_rString.replaceAll(sPattern, _rReplace);
            return oldString != _inout_rString;
        }
    }

    SharedResources::SharedResources()
    {
        SharedResources_Impl::registerClient();
    }


    SharedResources::~SharedResources()
    {
        SharedResources_Impl::revokeClient();
    }


    OUString SharedResources::getResourceString(TranslateId pResId) const
    {
        return SharedResources_Impl::getInstance().getResourceString(pResId);
    }


    OUString SharedResources::getResourceStringWithSubstitution(TranslateId pResId,
                const char* _pAsciiPatternToReplace, const OUString& _rStringToSubstitute ) const
    {
        OUString sString( SharedResources_Impl::getInstance().getResourceString(pResId) );
        if ( !lcl_substitute( sString, _pAsciiPatternToReplace, _rStringToSubstitute ) )
            SAL_WARN("connectivity.resource", "Unable to substitute " << _pAsciiPatternToReplace << " with " << _rStringToSubstitute);
        return sString;
    }


    OUString SharedResources::getResourceStringWithSubstitution(TranslateId pResId,
                const char* _pAsciiPatternToReplace1, const OUString& _rStringToSubstitute1,
                const char* _pAsciiPatternToReplace2, const OUString& _rStringToSubstitute2 ) const
    {
        OUString sString( SharedResources_Impl::getInstance().getResourceString(pResId) );
        if( !lcl_substitute( sString, _pAsciiPatternToReplace1, _rStringToSubstitute1 ) )
            SAL_WARN("connectivity.resource", "Unable to substitute " << _pAsciiPatternToReplace1 << " with " << _rStringToSubstitute1);
        if( !lcl_substitute( sString, _pAsciiPatternToReplace2, _rStringToSubstitute2 ) )
            SAL_WARN("connectivity.resource", "Unable to substitute " << _pAsciiPatternToReplace2 << " with " << _rStringToSubstitute2);
        return sString;
    }


    OUString SharedResources::getResourceStringWithSubstitution(TranslateId pResId,
                const char* _pAsciiPatternToReplace1, const OUString& _rStringToSubstitute1,
                const char* _pAsciiPatternToReplace2, const OUString& _rStringToSubstitute2,
                const char* _pAsciiPatternToReplace3, const OUString& _rStringToSubstitute3 ) const
    {
        OUString sString( SharedResources_Impl::getInstance().getResourceString(pResId) );
        if( !lcl_substitute( sString, _pAsciiPatternToReplace1, _rStringToSubstitute1 ) )
            SAL_WARN("connectivity.resource", "Unable to substitute " << _pAsciiPatternToReplace1 << " with " << _rStringToSubstitute1);
        if( !lcl_substitute( sString, _pAsciiPatternToReplace2, _rStringToSubstitute2 ) )
            SAL_WARN("connectivity.resource", "Unable to substitute " << _pAsciiPatternToReplace2 << " with " << _rStringToSubstitute2);
        if( !lcl_substitute( sString, _pAsciiPatternToReplace3, _rStringToSubstitute3 ) )
            SAL_WARN("connectivity.resource", "Unable to substitute " << _pAsciiPatternToReplace3 << " with " << _rStringToSubstitute3);
        return sString;
    }

    OUString SharedResources::getResourceStringWithSubstitution(TranslateId pResId,
                    const std::vector< std::pair<const char* , OUString > >& _rStringToSubstitutes) const
    {
        OUString sString( SharedResources_Impl::getInstance().getResourceString(pResId) );
        for(const auto& [rPattern, rReplace] : _rStringToSubstitutes)
            if( !lcl_substitute( sString, rPattern, rReplace ) )
                SAL_WARN("connectivity.resource", "Unable to substitute " << rPattern << " with " << rReplace);

        return sString;
    }


} // namespace connectivity


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