/**************************************************************
 * 
 * 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
 * 
 * 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.
 * 
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_ucb.hxx"

/**************************************************************************
								TODO
 **************************************************************************

 *************************************************************************/

#include <vector>
#include <ucbhelper/contentidentifier.hxx>
#include <ucbhelper/providerhelper.hxx>
#include "odma_datasupplier.hxx"
#include "odma_content.hxx"
#include "odma_contentprops.hxx"
#include "odma_provider.hxx"
#include "odma_lib.hxx"

using namespace com::sun::star::beans;
using namespace com::sun::star::lang;
using namespace com::sun::star::ucb;
using namespace com::sun::star::uno;
using namespace com::sun::star::sdbc;

using namespace odma;

namespace odma
{

//=========================================================================
//
// struct ResultListEntry.
//
//=========================================================================

struct ResultListEntry
{
	::rtl::OUString					    aId;
	Reference< XContentIdentifier >     xId;
	Reference< XContent > 			    xContent;
	Reference< XRow > 				    xRow;
	::rtl::Reference<ContentProperties>	rData;

	ResultListEntry( const ::rtl::Reference<ContentProperties>& rEntry ) : rData( rEntry ) {}
};

//=========================================================================
//
// ResultList.
//
//=========================================================================

typedef std::vector< ResultListEntry* > ResultList;

//=========================================================================
//
// struct DataSupplier_Impl.
//
//=========================================================================

struct DataSupplier_Impl
{
	osl::Mutex					      m_aMutex;
	ResultList					      m_aResults;
	rtl::Reference< Content >     	  m_xContent;
	Reference< XMultiServiceFactory > m_xSMgr;
// @@@ The data source and an iterator for it
//	Entry 		 	      	  		  m_aFolder;
//	Entry::iterator 		  		  m_aIterator;
  	sal_Int32					      m_nOpenMode;
  	sal_Bool					      m_bCountFinal;
														   
	DataSupplier_Impl( const Reference< XMultiServiceFactory >& rxSMgr,
	                   const rtl::Reference< Content >& rContent,
					   sal_Int32 nOpenMode )
	: m_xContent( rContent ), m_xSMgr( rxSMgr ),
//	  m_aFolder( rxSMgr, rContent->getIdentifier()->getContentIdentifier() ),
	  m_nOpenMode( nOpenMode ), m_bCountFinal( sal_False ) {}
	~DataSupplier_Impl();
};

//=========================================================================
DataSupplier_Impl::~DataSupplier_Impl()
{
	ResultList::const_iterator it  = m_aResults.begin();
	ResultList::const_iterator end = m_aResults.end();

	while ( it != end )
	{
		delete (*it);
		it++;
	}
}

}

//=========================================================================
//=========================================================================
//
// DataSupplier Implementation.
//
//=========================================================================
//=========================================================================

DataSupplier::DataSupplier( const Reference<XMultiServiceFactory >& rxSMgr,
						   const rtl::Reference< ::odma::Content >& rContent,
							sal_Int32 nOpenMode )
: m_pImpl( new DataSupplier_Impl( rxSMgr, rContent, nOpenMode ) )
{
}

//=========================================================================
// virtual
DataSupplier::~DataSupplier()
{
	delete m_pImpl;
}

//=========================================================================
// virtual
::rtl::OUString DataSupplier::queryContentIdentifierString( sal_uInt32 nIndex )
{
	osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( nIndex < m_pImpl->m_aResults.size() )
	{
		::rtl::OUString aId = m_pImpl->m_aResults[ nIndex ]->aId;
		if ( aId.getLength() )
		{
			// Already cached.
			return aId;
		}
	}

	if ( getResult( nIndex ) )
	{
		::rtl::OUString aId
			= m_pImpl->m_xContent->getIdentifier()->getContentIdentifier();

		aId += m_pImpl->m_aResults[ nIndex ]->rData->m_sTitle;

		m_pImpl->m_aResults[ nIndex ]->aId = aId;
		return aId;
	}
	return ::rtl::OUString();
}

//=========================================================================
// virtual
Reference< XContentIdentifier > DataSupplier::queryContentIdentifier(
														sal_uInt32 nIndex )
{
	osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( nIndex < m_pImpl->m_aResults.size() )
	{
		Reference< XContentIdentifier > xId
								= m_pImpl->m_aResults[ nIndex ]->xId;
		if ( xId.is() )
		{
			// Already cached.
			return xId;
		}
	}

	::rtl::OUString aId = queryContentIdentifierString( nIndex );
	if ( aId.getLength() )
	{
		Reference< XContentIdentifier > xId 
            = new ucbhelper::ContentIdentifier( aId );
		m_pImpl->m_aResults[ nIndex ]->xId = xId;
		return xId;
	}
	return Reference< XContentIdentifier >();
}

//=========================================================================
// virtual
Reference< XContent > DataSupplier::queryContent( sal_uInt32 nIndex )
{
	osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( nIndex < m_pImpl->m_aResults.size() )
	{
		Reference< XContent > xContent
								= m_pImpl->m_aResults[ nIndex ]->xContent;
		if ( xContent.is() )
		{
			// Already cached.
			return xContent;
		}
	}

	Reference< XContentIdentifier > xId = queryContentIdentifier( nIndex );
	if ( xId.is() )
	{
		try
		{
			Reference< XContent > xContent
				= m_pImpl->m_xContent->getProvider()->queryContent( xId );
			m_pImpl->m_aResults[ nIndex ]->xContent = xContent;
			return xContent;

		}
		catch ( IllegalIdentifierException& )
		{
		}
	}
	return Reference< XContent >();
}

//=========================================================================
// virtual
sal_Bool DataSupplier::getResult( sal_uInt32 nIndex )
{
	osl::ClearableGuard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( m_pImpl->m_aResults.size() > nIndex )
	{
		// Result already present.
		return sal_True;
	}

	// Result not (yet) present.

	if ( m_pImpl->m_bCountFinal )
		return sal_False;

	// Try to obtain result...

	sal_uInt32 nOldCount = m_pImpl->m_aResults.size();
	sal_Bool bFound = sal_False;
//	sal_uInt32 nPos = nOldCount;

	// @@@ Obtain data and put it into result list...
/*
	while ( m_pImpl->m_aFolder.next( m_pImpl->m_aIterator ) )
	{
		m_pImpl->m_aResults.push_back(
						new ResultListEntry( *m_pImpl->m_aIterator ) );

		if ( nPos == nIndex )
		{
			// Result obtained.
			bFound = sal_True;
			break;
		}

		nPos++;
	}
*/
	// now query for all documents in the DMS
	OSL_ENSURE(ContentProvider::getHandle(),"No Handle!");
	sal_Char* pQueryId		= new sal_Char[ODM_QUERYID_MAX];
	sal_Char* lpszDMSList	= new sal_Char[ODM_DMSID_MAX];

	ODMSTATUS odm = NODMGetDMS(ODMA_ODMA_REGNAME, lpszDMSList);
	lpszDMSList[strlen(lpszDMSList)+1] = '\0';

	::rtl::OString sQuery("SELECT ODM_DOCID, ODM_NAME");
	
	DWORD dwFlags = ODM_SPECIFIC;
	odm = NODMQueryExecute(ContentProvider::getHandle(), sQuery,dwFlags, lpszDMSList, pQueryId );
	if(odm != ODM_SUCCESS)
		return sal_False;

	sal_uInt16 nCount		= 10;
	sal_uInt16 nMaxCount	= 10;
	sal_Char* lpszDocId		= new sal_Char[ODM_DOCID_MAX * nMaxCount];
	sal_Char* lpszDocName	= new sal_Char[ODM_NAME_MAX * nMaxCount];

	
	::rtl::OUString sContentType(RTL_CONSTASCII_USTRINGPARAM(ODMA_CONTENT_TYPE));
	sal_uInt32 nCurrentCount = 0;
	do
	{
		if(nCount >= nMaxCount)
		{
			nCount = nMaxCount;
			odm = NODMQueryGetResults(ContentProvider::getHandle(), pQueryId,lpszDocId, lpszDocName, ODM_NAME_MAX, (WORD*)&nCount);
			nCurrentCount += nCount;
		}
		if(odm == ODM_SUCCESS && nIndex < nCurrentCount)
		{
			bFound = sal_True;
			for(sal_uInt16 i = 0; i < nCount; ++i)
			{
				::rtl::Reference<ContentProperties> rProps = new ContentProperties();
				rProps->m_sDocumentId	= ::rtl::OString(&lpszDocId[ODM_DOCID_MAX*i]);
				rProps->m_sContentType	= sContentType;
				m_pImpl->m_xContent->getContentProvider()->append(rProps);
				m_pImpl->m_aResults.push_back( new ResultListEntry(rProps));
			}
		}
	}
	while(nCount > nMaxCount);
	

	// now close the query
	odm = NODMQueryClose(ContentProvider::getHandle(), pQueryId);

	delete [] lpszDMSList;
	delete [] pQueryId;
	delete [] lpszDocId;
	delete [] lpszDocName;

	if ( !bFound )
		m_pImpl->m_bCountFinal = sal_True;

	rtl::Reference< ucbhelper::ResultSet > xResultSet = getResultSet();
	if ( xResultSet.is() )
	{
		// Callbacks follow!
		aGuard.clear();

		if ( nOldCount < m_pImpl->m_aResults.size() )
			xResultSet->rowCountChanged(
									nOldCount, m_pImpl->m_aResults.size() );

		if ( m_pImpl->m_bCountFinal )
			xResultSet->rowCountFinal();
	}

	return bFound;
}

//=========================================================================
// virtual
sal_uInt32 DataSupplier::totalCount()
{
	osl::ClearableGuard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( m_pImpl->m_bCountFinal )
		return m_pImpl->m_aResults.size();

	sal_uInt32 nOldCount = m_pImpl->m_aResults.size();

	// @@@ Obtain data and put it into result list...
/*
	while ( m_pImpl->m_aFolder.next( m_pImpl->m_aIterator ) )
		m_pImpl->m_aResults.push_back(
						new ResultListEntry( *m_pImpl->m_aIterator ) );
*/
	m_pImpl->m_bCountFinal = sal_True;

	rtl::Reference< ucbhelper::ResultSet > xResultSet = getResultSet();
	if ( xResultSet.is() )
	{
		// Callbacks follow!
		aGuard.clear();

		if ( nOldCount < m_pImpl->m_aResults.size() )
			xResultSet->rowCountChanged(
									nOldCount, m_pImpl->m_aResults.size() );

		xResultSet->rowCountFinal();
	}

	return m_pImpl->m_aResults.size();
}

//=========================================================================
// virtual
sal_uInt32 DataSupplier::currentCount()
{
	return m_pImpl->m_aResults.size();
}

//=========================================================================
// virtual
sal_Bool DataSupplier::isCountFinal()
{
	return m_pImpl->m_bCountFinal;
}

//=========================================================================
// virtual
Reference< XRow > DataSupplier::queryPropertyValues( sal_uInt32 nIndex  )
{
	osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( nIndex < m_pImpl->m_aResults.size() )
	{
		Reference< XRow > xRow = m_pImpl->m_aResults[ nIndex ]->xRow;
		if ( xRow.is() )
		{
			// Already cached.
			return xRow;
		}
	}

	if ( getResult( nIndex ) )
	{
		Reference< XRow > xRow = Content::getPropertyValues(
									m_pImpl->m_xSMgr,
									getResultSet()->getProperties(),
									m_pImpl->m_aResults[ nIndex ]->rData,
									m_pImpl->m_xContent->getProvider(),
									queryContentIdentifierString( nIndex ) );
		m_pImpl->m_aResults[ nIndex ]->xRow = xRow;
		return xRow;
	}

	return Reference< XRow >();
}

//=========================================================================
// virtual
void DataSupplier::releasePropertyValues( sal_uInt32 nIndex )
{
	osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( nIndex < m_pImpl->m_aResults.size() )
		m_pImpl->m_aResults[ nIndex ]->xRow = Reference< XRow >();
}

//=========================================================================
// virtual
void DataSupplier::close()
{
}

//=========================================================================
// virtual
void DataSupplier::validate()
	throw( ResultSetException )
{
}