/**
 * Copyright (c) 2014-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */

#ifndef FBX2GLTF_ANIMATIONDATA_H
#define FBX2GLTF_ANIMATIONDATA_H

#include "Raw2Gltf.h"

struct AnimationData : Holdable
{
    AnimationData(std::string name, const AccessorData &timeAccessor);

    // assumption: 1-to-1 relationship between channels and samplers; this is a simplification on what
    // glTF can express, but it means we can rely on samplerIx == channelIx throughout an animation
    void AddNodeChannel(const NodeData &node, const AccessorData &accessor, std::string path);

    json serialize() const override;

    struct channel_t
    {
        channel_t(uint32_t _ix, const NodeData &node, std::string path);

        const uint32_t    ix;
        const uint32_t    node;
        const std::string path;
    };

    struct sampler_t
    {
        sampler_t(uint32_t time, uint32_t output);

        const uint32_t time;
        const uint32_t output;
    };

    const std::string      name;
    const uint32_t         timeAccessor;
    std::vector<channel_t> channels;
    std::vector<sampler_t> samplers;
};

void to_json(json &j, const AnimationData::channel_t &data);
void to_json(json &j, const AnimationData::sampler_t &data);

#endif //FBX2GLTF_ANIMATIONDATA_H