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#include <iostream>
#include <stdlib.h>
#include <ctype.h>
#include <stdio.h>
#include <cstring>
#include "filterdetect.hxx"
#include <osl/diagnose.h>
#include <com/sun/star/lang/XMultiServiceFactory.hpp>
#include <com/sun/star/io/XActiveDataSource.hpp>
#include <com/sun/star/io/XOutputStream.hpp>
#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/xml/sax/XDocumentHandler.hpp>
#include <com/sun/star/xml/sax/InputSource.hpp>
#include <com/sun/star/xml/sax/XParser.hpp>
#include <com/sun/star/xml/XImportFilter.hpp>
#include <com/sun/star/xml/XExportFilter.hpp>
#include <com/sun/star/frame/XController.hpp>
#include <com/sun/star/task/XStatusIndicator.hpp>
#include <com/sun/star/task/XStatusIndicatorFactory.hpp>
#include <com/sun/star/style/XStyleFamiliesSupplier.hpp>
#include <com/sun/star/style/XStyleLoader.hpp>
#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/document/XExtendedFilterDetection.hpp>
#include <com/sun/star/container/XNameAccess.hpp>
#include <com/sun/star/beans/PropertyState.hpp>

#include <ucbhelper/content.hxx>
#include <ucbhelper/contentbroker.hxx>
#include <ucbhelper/commandenvironment.hxx>
#include <unotools/ucbhelper.hxx>
#include <com/sun/star/ucb/XCommandEnvironment.hpp>



using rtl::OUString;
using com::sun::star::uno::Sequence;
using com::sun::star::uno::Reference;
using com::sun::star::uno::Any;
using com::sun::star::uno::UNO_QUERY;
using com::sun::star::uno::XInterface;
using com::sun::star::uno::Exception;
using com::sun::star::uno::RuntimeException;
using com::sun::star::lang::XMultiServiceFactory;
using com::sun::star::io::XActiveDataSource;
using com::sun::star::io::XOutputStream;
using com::sun::star::beans::PropertyValue;
using com::sun::star::document::XExporter;
using com::sun::star::document::XFilter;
using com::sun::star::document::XExtendedFilterDetection;

using com::sun::star::io::XInputStream;
using com::sun::star::document::XImporter;
using com::sun::star::xml::sax::InputSource;
using com::sun::star::xml::sax::XDocumentHandler;
using com::sun::star::xml::sax::XParser;
using com::sun::star::task::XInteractionHandler;

using namespace ::com::sun::star::frame;
using namespace ::com::sun::star;
using namespace com::sun::star::container;
using namespace com::sun::star::uno;
using namespace com::sun::star::beans;

namespace {

bool isXMLStream(const ::rtl::OString& aHeaderStrm)
{
    const char* p = aHeaderStrm.getStr();
    size_t n = aHeaderStrm.getLength();
    size_t i = 0;

    // Skip all preceding blank characters.
    for (i = 0; i < n; ++i, ++p)
    {
        sal_Char c = *p;
        if (c == ' ' || c == '\n' || c == '\t')
            continue;
        break;
    }

    n -= i;

    // First text must be '<?xml', else it's not a valid XML file stream.
    const char* sInitChars = "<?xml";
    const size_t nInitCharLen = std::strlen(sInitChars);
    for (i = 0; i < n; ++i, ++p)
    {
        if (i < nInitCharLen)
        {
            if (*p != sInitChars[i])
                return false;
        }
    }
    return true;
}

::rtl::OUString supportedByType( const ::rtl::OUString clipBoardFormat ,  const ::rtl::OString resultString, const ::rtl::OUString checkType)
{
    ::rtl::OUString sTypeName;
    if ( clipBoardFormat.match(OUString(RTL_CONSTASCII_USTRINGPARAM("doctype:"))) )
    {
        ::rtl::OString tryStr = ::rtl::OUStringToOString(clipBoardFormat.copy(8),RTL_TEXTENCODING_ASCII_US).getStr();
        if (resultString.indexOf(tryStr) >= 0)
        {
            sTypeName = checkType;
        }
    }
    return sTypeName;
}

}

::rtl::OUString SAL_CALL FilterDetect::detect( com::sun::star::uno::Sequence< com::sun::star::beans::PropertyValue >& aArguments ) throw( com::sun::star::uno::RuntimeException )
{
    ::rtl::OUString sTypeName;
    ::rtl::OUString sUrl;
    ::rtl::OUString originalTypeName;
    Sequence<PropertyValue > lProps ;

    com::sun::star::uno::Reference< com::sun::star::io::XInputStream > xInStream;
    ::rtl::OUString temp;
    const PropertyValue * pValue = aArguments.getConstArray();
    sal_Int32 nLength;
    ::rtl::OString resultString;

    nLength = aArguments.getLength();
    sal_Int32 location=nLength;
    for (sal_Int32 i = 0 ; i < nLength; i++)
    {
        if (pValue[i].Name.equalsAsciiL ( RTL_CONSTASCII_STRINGPARAM ( "TypeName" ) ))
        {
            location=i;
        }
        else if (pValue[i].Name.equalsAsciiL ( RTL_CONSTASCII_STRINGPARAM ( "URL" ) ))
        {
            pValue[i].Value >>= sUrl;
        }
        else if (pValue[i].Name.equalsAsciiL ( RTL_CONSTASCII_STRINGPARAM ( "InputStream" ) ))
        {
            pValue[i].Value >>= xInStream ;
        }
    }
    try
    {
        Reference< com::sun::star::ucb::XCommandEnvironment > xEnv;
        if (!xInStream.is())
        {
            ::ucbhelper::Content aContent(sUrl,xEnv);
            xInStream = aContent.openStream();
            if (!xInStream.is())
            {
                return sTypeName;
            }
        }
        com::sun::star::uno::Sequence< sal_Int8 > aData;
        /* long nBytesToRead= */ xInStream->available();
        xInStream->skipBytes (0);
        long bytestRead =xInStream->readBytes (aData,  4000);
        resultString=::rtl::OString((const sal_Char *)aData.getConstArray(),bytestRead) ;

        if (!isXMLStream(resultString))
            // This is not an XML stream.  It makes no sense to try to detect
            // a non-XML file type here.
            return ::rtl::OUString();

        // test typedetect code
        Reference <XNameAccess> xTypeCont(mxMSF->createInstance(OUString( RTL_CONSTASCII_USTRINGPARAM( "com.sun.star.document.TypeDetection" ))),UNO_QUERY);
        Sequence < ::rtl::OUString > myTypes= xTypeCont->getElementNames();
        nLength = myTypes.getLength();

        sal_Int32 new_nlength=0;
        sal_Int32 i = 0 ;
        while ((i < nLength) && (sTypeName.getLength() == 0))
        {
            Any elem = xTypeCont->getByName(myTypes[i]);
            elem >>=lProps;
            new_nlength = lProps.getLength();
            sal_Int32 j =0;
            while (j < new_nlength && (sTypeName.getLength() == 0))
            {
                ::rtl::OUString tmpStr;
                lProps[j].Value >>=tmpStr;
                if ((lProps[j].Name.equalsAsciiL(RTL_CONSTASCII_STRINGPARAM("ClipboardFormat"))) && tmpStr.getLength())
                {
                    sTypeName = supportedByType(tmpStr,resultString, myTypes[i]);
                }
                j++;
            }
            i++;
        }
    }
    catch (const Exception &)
    {
        OSL_FAIL( "An Exception occurred while opening File stream" );
    }

    if (sTypeName.getLength())
    {
        if (location == aArguments.getLength())
        {
            aArguments.realloc(nLength+1);
            aArguments[location].Name = ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM( "TypeName" ));
        }
        aArguments[location].Value <<=sTypeName;
    }

    return sTypeName;
}

// XInitialization

void SAL_CALL FilterDetect::initialize( const Sequence< Any >& aArguments )
    throw (Exception, RuntimeException)
{
    Sequence < PropertyValue > aAnySeq;
    sal_Int32 nLength = aArguments.getLength();
    if ( nLength && ( aArguments[0] >>= aAnySeq ) )
    {
        const PropertyValue * pValue = aAnySeq.getConstArray();
        nLength = aAnySeq.getLength();
        for ( sal_Int32 i = 0 ; i < nLength; i++)
        {

            if ( pValue[i].Name.equalsAsciiL ( RTL_CONSTASCII_STRINGPARAM ( "Type" ) ) )
            {
                 pValue[i].Value >>= msFilterName;

            }
            else if ( pValue[i].Name.equalsAsciiL ( RTL_CONSTASCII_STRINGPARAM ( "UserData" ) ) )
            {

                pValue[i].Value >>= msUserData;

            }
            else if ( pValue[i].Name.equalsAsciiL ( RTL_CONSTASCII_STRINGPARAM ( "TemplateName" ) ) )
            {

              pValue[i].Value>>=msTemplateName;
            }

        }
    }
}



OUString FilterDetect_getImplementationName ()
    throw (RuntimeException)
{
    return OUString ( RTL_CONSTASCII_USTRINGPARAM ( "com.sun.star.comp.filters.XMLFilterDetect" ) );
}
#define SERVICE_NAME1 "com.sun.star.document.ExtendedTypeDetection"

sal_Bool SAL_CALL FilterDetect_supportsService( const OUString& ServiceName )
    throw (RuntimeException)
{
    return ServiceName.equalsAsciiL( RTL_CONSTASCII_STRINGPARAM ( SERVICE_NAME1 ) );
}
Sequence< OUString > SAL_CALL FilterDetect_getSupportedServiceNames(  )
    throw (RuntimeException)
{
    Sequence < OUString > aRet(2);
    OUString* pArray = aRet.getArray();
    pArray[0] =  OUString ( RTL_CONSTASCII_USTRINGPARAM ( SERVICE_NAME1 ) );
    return aRet;
}
#undef SERVICE_NAME1
#undef SERVICE_NAME2

Reference< XInterface > SAL_CALL FilterDetect_createInstance( const Reference< XMultiServiceFactory > & rSMgr)
    throw( Exception )
{
    return (cppu::OWeakObject*) new FilterDetect( rSMgr );
}

// XServiceInfo
OUString SAL_CALL FilterDetect::getImplementationName(  )
    throw (RuntimeException)
{
    return FilterDetect_getImplementationName();
}
sal_Bool SAL_CALL FilterDetect::supportsService( const OUString& rServiceName )
    throw (RuntimeException)
{
    return FilterDetect_supportsService( rServiceName );
}
Sequence< OUString > SAL_CALL FilterDetect::getSupportedServiceNames(  )
    throw (RuntimeException)
{
    return FilterDetect_getSupportedServiceNames();
}

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