/*

 * Copyright 2020 Google Inc.

 *

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#include "include/core/SkRefCnt.h"

#include "modules/skottie/src/SkottieJson.h"

#include "modules/skottie/src/layers/shapelayer/ShapeLayer.h"

#include "modules/sksg/include/SkSGGeometryNode.h"

#include "modules/sksg/include/SkSGMerge.h"

#include "src/utils/SkJSON.h"

#include <algorithm>

#include <cstddef>

#include <utility>

#include <vector>

namespace skottie {

namespace internal {

class AnimationBuilder;

sk_sp<sksg::Merge> ShapeBuilder::MergeGeometry(std::vector<sk_sp<sksg::GeometryNode>>&& geos,

                                               sksg::Merge::Mode mode) {

    std::vector<sksg::Merge::Rec> merge_recs;

    merge_recs.reserve(geos.size());

    for (auto& geo : geos) {

        merge_recs.push_back(

            {std::move(geo), merge_recs.empty() ? sksg::Merge::Mode::kMerge : mode});

    }

    return sksg::Merge::Make(std::move(merge_recs));

}

std::vector<sk_sp<sksg::GeometryNode>> ShapeBuilder::AttachMergeGeometryEffect(

        const skjson::ObjectValue& jmerge, const AnimationBuilder*,

        std::vector<sk_sp<sksg::GeometryNode>>&& geos) {

    static constexpr sksg::Merge::Mode gModes[] = {

        sksg::Merge::Mode::kMerge,      // "mm": 1

        sksg::Merge::Mode::kUnion,      // "mm": 2

        sksg::Merge::Mode::kDifference, // "mm": 3

        sksg::Merge::Mode::kIntersect,  // "mm": 4

        sksg::Merge::Mode::kXOR      ,  // "mm": 5

    };

    const auto mode = gModes[std::min<size_t>(ParseDefault<size_t>(jmerge["mm"], 1) - 1,

                                            std::size(gModes) - 1)];

    std::vector<sk_sp<sksg::GeometryNode>> merged;

    merged.push_back(ShapeBuilder::MergeGeometry(std::move(geos), mode));

    return merged;

}

} // namespace internal

} // namespace skottie