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#include <drawinglayer/primitive2d/metafileprimitive2d.hxx>
#include <utility>
#include <wmfemfhelper.hxx>

#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx>
#include <drawinglayer/primitive2d/transformprimitive2d.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <drawinglayer/primitive2d/maskprimitive2d.hxx>
#include <vcl/canvastools.hxx>

using namespace com::sun::star;

namespace drawinglayer::primitive2d
{
        Primitive2DReference MetafilePrimitive2D::create2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const
        {
            // Interpret the Metafile and get the content. There should be only one target, as in the start condition,
            // but iterating will be the right thing to do when some push/pop is not closed
            Primitive2DContainer xRetval(wmfemfhelper::interpretMetafile(getMetaFile(), rViewInformation));

            if(xRetval.empty())
                return nullptr;

            // get target size
            const ::tools::Rectangle aMtfTarget(getMetaFile().GetPrefMapMode().GetOrigin(), getMetaFile().GetPrefSize());
            const basegfx::B2DRange aMtfRange(vcl::unotools::b2DRectangleFromRectangle(aMtfTarget));

            // tdf#113197 get content range and check if we have an overlap with
            // defined target range (aMtfRange)
            if (!aMtfRange.isEmpty())
            {
                const basegfx::B2DRange aContentRange(xRetval.getB2DRange(rViewInformation));

                // also test equal since isInside gives also true for equal
                if (!aMtfRange.equal(aContentRange) && !aMtfRange.isInside(aContentRange))
                {
                    // contentRange is partly larger than aMtfRange (stuff sticks
                    // outside), clipping is needed
                    const drawinglayer::primitive2d::Primitive2DReference xMask(
                        new drawinglayer::primitive2d::MaskPrimitive2D(
                            basegfx::B2DPolyPolygon(
                                basegfx::utils::createPolygonFromRect(
                                    aMtfRange)),
                            std::move(xRetval)));

                    xRetval = drawinglayer::primitive2d::Primitive2DContainer{ xMask };
                }
            }

            // create transformation
            basegfx::B2DHomMatrix aAdaptedTransform;

            aAdaptedTransform.translate(-aMtfTarget.Left(), -aMtfTarget.Top());
            aAdaptedTransform.scale(
                aMtfTarget.getOpenWidth() ? 1.0 / aMtfTarget.getOpenWidth() : 1.0,
                aMtfTarget.getOpenHeight() ? 1.0 / aMtfTarget.getOpenHeight() : 1.0);
            aAdaptedTransform = getTransform() * aAdaptedTransform;

            // embed to target transformation
            const Primitive2DReference aEmbeddedTransform(
                new TransformPrimitive2D(
                    aAdaptedTransform,
                    std::move(xRetval)));

            return aEmbeddedTransform;
        }

        MetafilePrimitive2D::MetafilePrimitive2D(
            basegfx::B2DHomMatrix aMetaFileTransform,
            const GDIMetaFile& rMetaFile)
        :   maMetaFileTransform(std::move(aMetaFileTransform)),
            maMetaFile(rMetaFile)
        {
            // activate callback to flush buffered decomposition content
            setCallbackSeconds(20);
        }

        bool MetafilePrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const
        {
            if(BufferedDecompositionPrimitive2D::operator==(rPrimitive))
            {
                const MetafilePrimitive2D& rCompare = static_cast<const MetafilePrimitive2D&>(rPrimitive);

                return (getTransform() == rCompare.getTransform()
                    && getMetaFile() == rCompare.getMetaFile());
            }

            return false;
        }

        basegfx::B2DRange MetafilePrimitive2D::getB2DRange(const geometry::ViewInformation2D& /*rViewInformation*/) const
        {
            // use own implementation to quickly answer the getB2DRange question. The
            // MetafilePrimitive2D assumes that all geometry is inside of the shape. If
            // this is not the case (i have already seen some wrong Metafiles) it should
            // be embedded to a MaskPrimitive2D
            basegfx::B2DRange aRetval(0.0, 0.0, 1.0, 1.0);
            aRetval.transform(getTransform());

            return aRetval;
        }

        // from MetafileAccessor
        void MetafilePrimitive2D::accessMetafile(GDIMetaFile& rTargetMetafile) const
        {
            rTargetMetafile = maMetaFile;
        }

        // provide unique ID
        sal_uInt32 MetafilePrimitive2D::getPrimitive2DID() const
        {
            return PRIMITIVE2D_ID_METAFILEPRIMITIVE2D;
        }

} // end of namespace

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