/* -*- 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 <vector>

#include <ucbhelper/contentidentifier.hxx>
#include <ucbhelper/providerhelper.hxx>

#include "myucp_datasupplier.hxx"
#include <ContentHelper.hxx>
#include <com/sun/star/container/XHierarchicalNameAccess.hpp>
#include <com/sun/star/ucb/IllegalIdentifierException.hpp>

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

// @@@ Adjust namespace name.
using namespace dbaccess;

// @@@ Adjust namespace name.
namespace dbaccess
{

// struct ResultListEntry.
struct ResultListEntry
{
    OUString                       aId;
    Reference< XContentIdentifier >     xId;
    ::rtl::Reference< OContentHelper >  xContent;
    Reference< XRow >                   xRow;
    const ContentProperties&            rData;

    explicit ResultListEntry(const ContentProperties& rEntry) : rData( rEntry ) {}
};

// struct DataSupplier_Impl.
struct DataSupplier_Impl
{
    osl::Mutex                                   m_aMutex;
    std::vector< std::unique_ptr<ResultListEntry> > m_aResults;
    rtl::Reference< ODocumentContainer >         m_xContent;
    bool                                         m_bCountFinal;

    explicit DataSupplier_Impl(const rtl::Reference< ODocumentContainer >& rContent)
        : m_xContent(rContent)
        , m_bCountFinal(false)
    {
    }
};

}

// DataSupplier Implementation.

DataSupplier::DataSupplier( const rtl::Reference< ODocumentContainer >& rContent )
: m_pImpl( new DataSupplier_Impl( rContent ) )
{

}

DataSupplier::~DataSupplier()
{

}

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

    if ( static_cast<size_t>(nIndex) < m_pImpl->m_aResults.size() )
    {
        OUString aId = m_pImpl->m_aResults[ nIndex ]->aId;
        if ( !aId.isEmpty() )
        {
            // Already cached.
            return aId;
        }
    }

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

        if ( !aId.isEmpty() )
            aId += "/";

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

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

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

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

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

Reference< XContent >
DataSupplier::queryContent( sal_uInt32 _nIndex )
{
    osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

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

    Reference< XContentIdentifier > xId = queryContentIdentifier( _nIndex );
    if ( xId.is() )
    {
        try
        {
            Reference< XContent > xContent;
            OUString sName = xId->getContentIdentifier();
            sName = sName.copy(sName.lastIndexOf('/')+1);

            m_pImpl->m_aResults[ _nIndex ]->xContent = m_pImpl->m_xContent->getContent(sName);

            xContent = m_pImpl->m_aResults[ _nIndex ]->xContent.get();
            return xContent;

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

bool DataSupplier::getResult( sal_uInt32 nIndex )
{
    osl::ClearableGuard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

    if ( static_cast<size_t>(nIndex) < m_pImpl->m_aResults.size() )
    {
        // Result already present.
        return true;
    }

    // Result not (yet) present.

    if ( m_pImpl->m_bCountFinal )
        return false;

    // Try to obtain result...

    sal_uInt32 nOldCount = m_pImpl->m_aResults.size();
    bool bFound = false;
    sal_uInt32 nPos = nOldCount;

    // @@@ Obtain data and put it into result list...
    Sequence< OUString> aSeq = m_pImpl->m_xContent->getElementNames();
    if ( nIndex < sal::static_int_cast< sal_uInt32 >( aSeq.getLength() ) )
    {
        const OUString* pIter = aSeq.getConstArray();
        const OUString* pEnd   = pIter + aSeq.getLength();
        for(pIter = pIter + nPos;pIter != pEnd;++pIter,++nPos)
        {
            m_pImpl->m_aResults.emplace_back(
                            new ResultListEntry( m_pImpl->m_xContent->getContent(*pIter)->getContentProperties() ) );

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

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

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

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

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

    return bFound;
}

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...
    Sequence< OUString> aSeq = m_pImpl->m_xContent->getElementNames();
    const OUString* pIter = aSeq.getConstArray();
    const OUString* pEnd   = pIter + aSeq.getLength();
    for(;pIter != pEnd;++pIter)
        m_pImpl->m_aResults.emplace_back(
                        new ResultListEntry( m_pImpl->m_xContent->getContent(*pIter)->getContentProperties() ) );

    m_pImpl->m_bCountFinal = true;

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

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

        xResultSet->rowCountFinal();
    }

    return m_pImpl->m_aResults.size();
}

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

bool DataSupplier::isCountFinal()
{
    return m_pImpl->m_bCountFinal;
}

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

    if ( static_cast<size_t>(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 ) )
    {
        if ( !m_pImpl->m_aResults[ nIndex ]->xContent.is() )
            queryContent(nIndex);

        Reference< XRow > xRow = m_pImpl->m_aResults[ nIndex ]->xContent->getPropertyValues(getResultSet()->getProperties());
        m_pImpl->m_aResults[ nIndex ]->xRow = xRow;
        return xRow;
    }

    return Reference< XRow >();
}

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

    if ( static_cast<size_t>(nIndex) < m_pImpl->m_aResults.size() )
        m_pImpl->m_aResults[ nIndex ]->xRow.clear();
}

void DataSupplier::close()
{
}

void DataSupplier::validate()
{
}

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