/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * 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 <tools/diagnose_ex.h>

#include <sal/log.hxx>

#include <com/sun/star/animations/TransitionType.hpp>
#include <com/sun/star/animations/TransitionSubType.hpp>

#include <transitionfactory.hxx>
#include "transitionfactorytab.hxx"
#include "parametricpolypolygonfactory.hxx"
#include <animationfactory.hxx>
#include "clippingfunctor.hxx"

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

namespace slideshow::internal {

/***************************************************
 ***                                             ***
 ***          Shape Transition Effects           ***
 ***                                             ***
 ***************************************************/

namespace {

class ClippingAnimation : public NumberAnimation
{
public:
    ClippingAnimation(
        const ParametricPolyPolygonSharedPtr&   rPolygon,
        const ShapeManagerSharedPtr&            rShapeManager,
        const TransitionInfo&                   rTransitionInfo,
        bool                                    bDirectionForward,
        bool                                    bModeIn );

    virtual ~ClippingAnimation() override;

    // Animation interface

    virtual void prefetch() override;
    virtual void start( const AnimatableShapeSharedPtr&     rShape,
                        const ShapeAttributeLayerSharedPtr& rAttrLayer ) override;
    virtual void end() override;

    // NumberAnimation interface

    virtual bool operator()( double nValue ) override;
    virtual double getUnderlyingValue() const override;

private:
    void end_();

    AnimatableShapeSharedPtr           mpShape;
    ShapeAttributeLayerSharedPtr       mpAttrLayer;
    ShapeManagerSharedPtr              mpShapeManager;
    ClippingFunctor                    maClippingFunctor;
    bool                               mbSpriteActive;
};

ClippingAnimation::ClippingAnimation(
    const ParametricPolyPolygonSharedPtr&   rPolygon,
    const ShapeManagerSharedPtr&            rShapeManager,
    const TransitionInfo&                   rTransitionInfo,
    bool                                    bDirectionForward,
    bool                                    bModeIn ) :
        mpShape(),
        mpAttrLayer(),
        mpShapeManager( rShapeManager ),
        maClippingFunctor( rPolygon,
                           rTransitionInfo,
                           bDirectionForward,
                           bModeIn ),
        mbSpriteActive(false)
{
    ENSURE_OR_THROW(
        rShapeManager,
        "ClippingAnimation::ClippingAnimation(): Invalid ShapeManager" );
}

ClippingAnimation::~ClippingAnimation()
{
    try
    {
        end_();
    }
    catch (const uno::Exception&)
    {
        TOOLS_WARN_EXCEPTION("slideshow", "");
    }
}

void ClippingAnimation::prefetch()
{
}

void ClippingAnimation::start( const AnimatableShapeSharedPtr&      rShape,
                               const ShapeAttributeLayerSharedPtr&  rAttrLayer )
{
    OSL_ENSURE( !mpShape,
                "ClippingAnimation::start(): Shape already set" );
    OSL_ENSURE( !mpAttrLayer,
                "ClippingAnimation::start(): Attribute layer already set" );
    ENSURE_OR_THROW( rShape,
                      "ClippingAnimation::start(): Invalid shape" );
    ENSURE_OR_THROW( rAttrLayer,
                      "ClippingAnimation::start(): Invalid attribute layer" );

    mpShape = rShape;
    mpAttrLayer = rAttrLayer;

    if( !mbSpriteActive )
    {
        mpShapeManager->enterAnimationMode( mpShape );
        mbSpriteActive = true;
    }
}

void ClippingAnimation::end()
{
    end_();
}

void ClippingAnimation::end_()
{
    if( mbSpriteActive )
    {
        mbSpriteActive = false;
        mpShapeManager->leaveAnimationMode( mpShape );

        if( mpShape->isContentChanged() )
            mpShapeManager->notifyShapeUpdate( mpShape );
    }
}

bool ClippingAnimation::operator()( double nValue )
{
    ENSURE_OR_RETURN_FALSE(
        mpAttrLayer && mpShape,
        "ClippingAnimation::operator(): Invalid ShapeAttributeLayer" );

    // set new clip
    mpAttrLayer->setClip( maClippingFunctor( nValue,
                                             mpShape->getDomBounds().getRange() ) );

    if( mpShape->isContentChanged() )
        mpShapeManager->notifyShapeUpdate( mpShape );

    return true;
}

double ClippingAnimation::getUnderlyingValue() const
{
    ENSURE_OR_THROW(
        mpAttrLayer,
        "ClippingAnimation::getUnderlyingValue(): Invalid ShapeAttributeLayer" );

    return 0.0;     // though this should be used in concert with
                    // ActivitiesFactory::createSimpleActivity, better
                    // explicitly name our start value.
                    // Permissible range for operator() above is [0,1]
}

AnimationActivitySharedPtr createShapeTransitionByType(
    const ActivitiesFactory::CommonParameters&              rParms,
    const AnimatableShapeSharedPtr&                         rShape,
    const ShapeManagerSharedPtr&                            rShapeManager,
    const ::basegfx::B2DVector&                             rSlideSize,
    css::uno::Reference< css::animations::XTransitionFilter > const& xTransition,
    sal_Int16                                               nType,
    sal_Int16                                               nSubType )
{
    ENSURE_OR_THROW(
        xTransition.is(),
        "createShapeTransitionByType(): Invalid XTransition" );

    const TransitionInfo* pTransitionInfo(
        getTransitionInfo( nType, nSubType ) );

    AnimationActivitySharedPtr pGeneratedActivity;
    if( pTransitionInfo != nullptr )
    {
        switch( pTransitionInfo->meTransitionClass )
        {
            default:
            case TransitionInfo::TRANSITION_INVALID:
                OSL_FAIL( "createShapeTransitionByType(): Invalid transition type. "
                            "Don't ask me for a 0 TransitionType, have no XTransitionFilter node instead!" );
                return AnimationActivitySharedPtr();


            case TransitionInfo::TRANSITION_CLIP_POLYPOLYGON:
            {
                // generate parametric poly-polygon
                ParametricPolyPolygonSharedPtr pPoly(
                    ParametricPolyPolygonFactory::createClipPolyPolygon(
                        nType, nSubType ) );

                // create a clip activity from that
                pGeneratedActivity = ActivitiesFactory::createSimpleActivity(
                    rParms,
                    std::make_shared<ClippingAnimation>(
                            pPoly,
                            rShapeManager,
                            *pTransitionInfo,
                            xTransition->getDirection(),
                            xTransition->getMode() ),
                    true );
            }
            break;

            case TransitionInfo::TRANSITION_SPECIAL:
            {
                switch( nType )
                {
                    case animations::TransitionType::RANDOM:
                    {
                        // select randomly one of the effects from the
                        // TransitionFactoryTable

                        const TransitionInfo* pRandomTransitionInfo( getRandomTransitionInfo() );

                        ENSURE_OR_THROW( pRandomTransitionInfo != nullptr,
                                          "createShapeTransitionByType(): Got invalid random transition info" );

                        ENSURE_OR_THROW( pRandomTransitionInfo->mnTransitionType != animations::TransitionType::RANDOM,
                                          "createShapeTransitionByType(): Got random again for random input!" );

                        // and recurse
                        pGeneratedActivity = createShapeTransitionByType( rParms,
                                                                    rShape,
                                                                    rShapeManager,
                                                                    rSlideSize,
                                                                    xTransition,
                                                                    pRandomTransitionInfo->mnTransitionType,
                                                                    pRandomTransitionInfo->mnTransitionSubType );
                    }
                    break;

                    // TODO(F3): Implement slidewipe for shape
                    case animations::TransitionType::SLIDEWIPE:
                    {
                        sal_Int16 nBarWipeSubType(0);
                        bool      bDirectionForward(true);

                        // map slidewipe to BARWIPE, for now
                        switch( nSubType )
                        {
                            case animations::TransitionSubType::FROMLEFT:
                                nBarWipeSubType = animations::TransitionSubType::LEFTTORIGHT;
                                bDirectionForward = true;
                                break;

                            case animations::TransitionSubType::FROMRIGHT:
                                nBarWipeSubType = animations::TransitionSubType::LEFTTORIGHT;
                                bDirectionForward = false;
                                break;

                            case animations::TransitionSubType::FROMTOP:
                                nBarWipeSubType = animations::TransitionSubType::TOPTOBOTTOM;
                                bDirectionForward = true;
                                break;

                            case animations::TransitionSubType::FROMBOTTOM:
                                nBarWipeSubType = animations::TransitionSubType::TOPTOBOTTOM;
                                bDirectionForward = false;
                                break;

                            default:
                                ENSURE_OR_THROW( false,
                                                  "createShapeTransitionByType(): Unexpected subtype for SLIDEWIPE" );
                                break;
                        }

                        // generate parametric poly-polygon
                        ParametricPolyPolygonSharedPtr pPoly(
                            ParametricPolyPolygonFactory::createClipPolyPolygon(
                                animations::TransitionType::BARWIPE,
                                nBarWipeSubType ) );

                        // create a clip activity from that
                        pGeneratedActivity = ActivitiesFactory::createSimpleActivity(
                            rParms,
                            std::make_shared<ClippingAnimation>(
                                    pPoly,
                                    rShapeManager,
                                    *getTransitionInfo( animations::TransitionType::BARWIPE,
                                                        nBarWipeSubType ),
                                    bDirectionForward,
                                    xTransition->getMode() ),
                            true );
                    }
                    break;

                    default:
                    {
                        // TODO(F1): Check whether there's anything left, anyway,
                        // for _shape_ transitions. AFAIK, there are no special
                        // effects for shapes...

                        // for now, map all to fade effect
                        pGeneratedActivity = ActivitiesFactory::createSimpleActivity(
                            rParms,
                            AnimationFactory::createNumberPropertyAnimation(
                                "Opacity",
                                rShape,
                                rShapeManager,
                                rSlideSize ),
                            xTransition->getMode() );
                    }
                    break;
                }
            }
            break;
        }
    }

    if( !pGeneratedActivity )
    {
        // No animation generated, maybe no table entry for given
        // transition?
        SAL_WARN("slideshow",
            "createShapeTransitionByType(): Unknown type/subtype combination encountered: "
            << xTransition->getTransition() << " " << xTransition->getSubtype() );
    }

    return pGeneratedActivity;
}

} // anon namespace

AnimationActivitySharedPtr TransitionFactory::createShapeTransition(
    const ActivitiesFactory::CommonParameters&          rParms,
    const AnimatableShapeSharedPtr&                     rShape,
    const ShapeManagerSharedPtr&                        rShapeManager,
    const ::basegfx::B2DVector&                         rSlideSize,
    uno::Reference< animations::XTransitionFilter > const& xTransition )
{
    return createShapeTransitionByType( rParms,
                                  rShape,
                                  rShapeManager,
                                  rSlideSize,
                                  xTransition,
                                  xTransition->getTransition(),
                                  xTransition->getSubtype() );
}

}

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