/* SPDX-License-Identifier: GPL-2.0-or-later
 * Copyright 2019 Blender Foundation. All rights reserved. */
#pragma once

#include "IO_abstract_hierarchy_iterator.h"
#include "usd.h"
#include "usd_exporter_context.h"

#include <string>

#include <pxr/usd/usd/common.h>
#include <pxr/usd/usd/timeCode.h>

struct Depsgraph;
struct Object;

namespace blender::io::usd {

using blender::io::AbstractHierarchyIterator;
using blender::io::AbstractHierarchyWriter;
using blender::io::HierarchyContext;

class USDHierarchyIterator : public AbstractHierarchyIterator {
 private:
  const pxr::UsdStageRefPtr stage_;
  pxr::UsdTimeCode export_time_;
  const USDExportParams &params_;

 public:
  USDHierarchyIterator(Depsgraph *depsgraph,
                       pxr::UsdStageRefPtr stage,
                       const USDExportParams &params);

  void set_export_frame(float frame_nr);
  const pxr::UsdTimeCode &get_export_time_code() const;

  virtual std::string make_valid_name(const std::string &name) const override;

 protected:
  virtual bool mark_as_weak_export(const Object *object) const override;

  virtual AbstractHierarchyWriter *create_transform_writer(
      const HierarchyContext *context) override;
  virtual AbstractHierarchyWriter *create_data_writer(const HierarchyContext *context) override;
  virtual AbstractHierarchyWriter *create_hair_writer(const HierarchyContext *context) override;
  virtual AbstractHierarchyWriter *create_particle_writer(
      const HierarchyContext *context) override;

  virtual void release_writer(AbstractHierarchyWriter *writer) override;

 private:
  USDExporterContext create_usd_export_context(const HierarchyContext *context);
};

}  // namespace blender::io::usd
