/**************************************************************
 * 
 * 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_chart2.hxx"

#include "ConfigColorScheme.hxx"
#include "ContainerHelper.hxx"
#include "macros.hxx"

#include <unotools/configitem.hxx>

#include <set>

using namespace ::com::sun::star;

using ::com::sun::star::uno::Reference;
using ::com::sun::star::uno::Sequence;
using ::rtl::OUString;

namespace
{

static const OUString aSeriesPropName( RTL_CONSTASCII_USTRINGPARAM("Series"));

} // anonymous namespace

// --------------------------------------------------------------------------------

namespace chart
{

uno::Reference< chart2::XColorScheme > createConfigColorScheme( const uno::Reference< uno::XComponentContext > & xContext )
{
    return new ConfigColorScheme( xContext );
}

namespace impl
{
class ChartConfigItem : public ::utl::ConfigItem
{
public:
    explicit ChartConfigItem( ConfigItemListener & rListener );
    virtual ~ChartConfigItem();

    void addPropertyNotification( const OUString & rPropertyName );

    uno::Any getProperty( const OUString & aPropertyName );

protected:
    // ____ ::utl::ConfigItem ____
    virtual void                    Commit();
    virtual void Notify( const Sequence< OUString > & aPropertyNames );

private:
    ConfigItemListener & m_rListener;
    ::std::set< OUString >        m_aPropertiesToNotify;
};

ChartConfigItem::ChartConfigItem( ConfigItemListener & rListener ) :
        ::utl::ConfigItem( C2U("Office.Chart/DefaultColor")),
    m_rListener( rListener )
{}

ChartConfigItem::~ChartConfigItem()
{}

void ChartConfigItem::Notify( const Sequence< OUString > & aPropertyNames )
{
    for( sal_Int32 nIdx=0; nIdx<aPropertyNames.getLength(); ++nIdx )
    {
        if( m_aPropertiesToNotify.find( aPropertyNames[nIdx] ) != m_aPropertiesToNotify.end())
            m_rListener.notify( aPropertyNames[nIdx] );
    }
}

void ChartConfigItem::Commit()
{}

void ChartConfigItem::addPropertyNotification( const OUString & rPropertyName )
{
    m_aPropertiesToNotify.insert( rPropertyName );
    EnableNotification( ContainerHelper::ContainerToSequence( m_aPropertiesToNotify ));
}

uno::Any ChartConfigItem::getProperty( const OUString & aPropertyName )
{
    Sequence< uno::Any > aValues(
        GetProperties( Sequence< OUString >( &aPropertyName, 1 )));
    if( ! aValues.getLength())
        return uno::Any();
    return aValues[0];
}

} // namespace impl

// --------------------------------------------------------------------------------

// explicit
ConfigColorScheme::ConfigColorScheme(
    const Reference< uno::XComponentContext > & xContext ) :
        m_xContext( xContext  ),
        m_nNumberOfColors( 0 ),
        m_bNeedsUpdate( true )
{
}

ConfigColorScheme::~ConfigColorScheme()
{}

void ConfigColorScheme::retrieveConfigColors()
{
    if( ! m_xContext.is())
        return;

    // create config item if necessary
    if( ! m_apChartConfigItem.get())
    {
        m_apChartConfigItem.reset(
            new impl::ChartConfigItem( *this ));
        m_apChartConfigItem->addPropertyNotification( aSeriesPropName );
    }
    OSL_ASSERT( m_apChartConfigItem.get());
    if( ! m_apChartConfigItem.get())
        return;

    // retrieve colors
    uno::Any aValue(
        m_apChartConfigItem->getProperty( aSeriesPropName ));
    if( aValue >>= m_aColorSequence )
        m_nNumberOfColors = m_aColorSequence.getLength();
    m_bNeedsUpdate = false;
}

// ____ XColorScheme ____
::sal_Int32 SAL_CALL ConfigColorScheme::getColorByIndex( ::sal_Int32 nIndex )
    throw (uno::RuntimeException)
{
    if( m_bNeedsUpdate )
        retrieveConfigColors();

    if( m_nNumberOfColors > 0 )
        return static_cast< sal_Int32 >( m_aColorSequence[ nIndex % m_nNumberOfColors ] );

    // fall-back: hard-coded standard colors
    static sal_Int32 nDefaultColors[] =  {
        0x9999ff, 0x993366, 0xffffcc,
        0xccffff, 0x660066, 0xff8080,
        0x0066cc, 0xccccff, 0x000080,
        0xff00ff, 0x00ffff, 0xffff00
    };

    static const sal_Int32 nMaxDefaultColors = sizeof( nDefaultColors ) / sizeof( sal_Int32 );
    return nDefaultColors[ nIndex % nMaxDefaultColors ];
}

void ConfigColorScheme::notify( const OUString & rPropertyName )
{
    if( rPropertyName.equals( aSeriesPropName ))
        m_bNeedsUpdate = true;
}

// ================================================================================

Sequence< OUString > ConfigColorScheme::getSupportedServiceNames_Static()
{
    Sequence< OUString > aServices( 1 );
    aServices[ 0 ] = C2U( "com.sun.star.chart2.ColorScheme" );
    return aServices;
}

// implement XServiceInfo methods basing upon getSupportedServiceNames_Static
APPHELPER_XSERVICEINFO_IMPL( ConfigColorScheme,
                             C2U( "com.sun.star.comp.chart2.ConfigDefaultColorScheme" ))

// ================================================================================

} //  namespace chart