/******************************************************************************
 * Copyright 2018 NVIDIA Corporation. All rights reserved.
 *****************************************************************************/
/// \file
/// \brief Interfaces for exposing the data distribution scheme.

#ifndef NVIDIA_INDEX_IDATA_DISTRIBUTION_H
#define NVIDIA_INDEX_IDATA_DISTRIBUTION_H

#include <mi/base/interface_declare.h>
#include <mi/dice.h>
#include <mi/neuraylib/iserializer.h>

#include <nv/index/idistributed_data_edit.h>

namespace nv
{
namespace index
{

/// @ingroup nv_index_data_access
/// The interface class exposes data locality information.
///
/// In general, the data representation that corresponds to a large-scale
/// dataset is distributed in the cluster environment to enable
/// scalable rendering and computing (based on a sort-last approach).
/// The distribution scheme relies on a spatial subdivision
/// of the entire scene space.
/// Using the subdivision scheme, the data representation is partitioned
/// into subsets that are distributed to and stored on the nodes in the
/// cluster. Each subset is contained in its local space bounding box.
///
/// The data locality provides the application the means to query where, i.e., on
/// which node in the cluster, a subset of the data representation of the entire
/// distributed dataset is stored. A node stores either none or a set of subsets.
/// Furthermore, the data locality information provides the number of
/// those 3D bounding boxes that correspond to the number of subsets
/// stored on a given cluster node. Each of the bounding boxes can be
/// accessed. The respective index then also corresponds to the distributed
/// data subset.
///
/// A common use case that requires the data locality is the invocation of
/// parallel and distributed compute tasks applied to the distributed data.
/// DiCE provides a fragmented job infrastructure (\c IFragmented_job) that allows
/// invoking operations in the cluster.
/// Each job invocation usually requires information about
/// the number of operations (a.k.a. fragments) that shall be launched and the
/// target cluster nodes to which the launched fragments shall be sent to
/// process or analyze the distributed data.
///
///
/// \deprecated This interface class is subject to change!
///

class IDistributed_data_locality
  : public mi::base::Interface_declare<0x64624ed0, 0x6e2a, 0x48c9, 0xb9, 0x73, 0x61, 0x8d, 0x32,
      0xd0, 0x5e, 0xf5, mi::neuraylib::ISerializable>
{
public:
  /// The data representation is distributed to a number of machines in the cluster.
  /// A cluster node hosts none or a subset of the distributed data.
  /// The number of nodes that host a subset of the entire
  /// dataset allows, for instance, setting up the fragmented job, i.e.,
  /// the number of fragments a fragmented job shall be split into.
  ///
  /// \return             The number of cluster nodes that host a subset of
  ///                     the entire data representation.
  ///
  virtual mi::Uint32 get_nb_cluster_nodes() const = 0;

  /// The data representation is distributed to the given cluster machines.
  /// Each of the cluster machines has a unique id. The method returns the unique
  /// ids of the cluster machines that store a subset of the data locally.
  ///
  /// \param[in] index    The index used to access one of the cluster nodes.
  ///                     The index must be given in the range from 0 to
  ///                     \c get_nb_cluster_nodes().
  ///
  /// \return             The indexed unique cluster machines id.
  ///
  virtual mi::Uint32 get_cluster_node(mi::Uint32 index) const = 0;

  /// Each cluster node hosts none or a subset of the large-scale data representation.
  /// Each subset has its own bounding box in the scene element's local space.
  /// The number of subsets stored locally, i.e., the number
  /// of bounding boxes per cluster node, allows, for instance, a user-defined
  /// compute algorithm to iterate over all subsets on a cluster machines.
  ///
  /// \param[in] cluster_node_id      The id that references a cluster machine.
  ///
  /// \return                         The number of data subsets
  ///                                 stored locally on the cluster node.
  ///
  virtual mi::Size get_nb_bounding_box(mi::Uint32 cluster_node_id) const = 0;

  /// The data subset stored locally on a cluster node is defined inside its bounding box.
  /// The method allows iterating over all the bounding boxes
  /// on a cluster machine, e.g., to implement compute techniques.
  ///
  /// \param[in] cluster_node_id      The id that references a cluster node.
  ///                                 The index must be given in the range
  ///                                 from 0 to \c get_nb_bounding_box().
  ///
  /// \param[in] index                The index of the bounding box that references
  ///                                 the actual subset of the large-scale data
  ///                                 representation.
  ///
  /// \return                         The data subset's bounding
  ///                                 box in the scene element's local space.
  ///
  virtual const mi::math::Bbox_struct<mi::Sint32, 3> get_bounding_box(
    mi::Uint32 cluster_node_id, mi::Uint32 index) const = 0;
};

/// @ingroup nv_index_data_access
/// The interface class exposes the locality information of a distributed regular volume dataset.
///
/// The interface method \c IData_distribution::retrieve_data_locality()
/// returns the volume data locality.
///
///
/// \deprecated This interface class is subject to change!
///
class IRegular_volume_data_locality
  : public mi::base::Interface_declare<0x64624ed9, 0x6e2a, 0x48c9, 0xa9, 0x82, 0x61, 0x8d, 0x32,
      0xd0, 0x5e, 0xf9, IDistributed_data_locality>
{
public:
  /// Creates means to edit the volume brick stored locally on a cluster node.
  /// The method may only be called on the cluster machine that stores the data.
  ///
  /// \param[in] dice_transaction     The DiCE transaction used that the tasks operates in.
  ///
  /// \param[in] cluster_node_id      The index of the cluster machine that stores
  ///                                 a certain brick data.
  ///
  /// \param[in] index                The index of the bounding box that references
  ///                                 the actual brick of the subset of bricks.
  ///
  /// \return                         Returns an NVIDIA IndeX instance of
  ///                                 the interface class \c IRegular_volume_data_edit
  ///                                 to edit the brick data contents.
  ///
  ///
  virtual IRegular_volume_data_edit* create_data_edit(
    mi::neuraylib::IDice_transaction* dice_transaction, mi::Uint32 cluster_node_id,
    mi::Uint32 index) const = 0;

  /// Creates means to access the volume brick stored locally on a cluster machine.
  /// While the interface class \c IRegular_volume_data_access creates of copy of the
  /// present interface method exposes direct access to the brick data stored locally
  /// on a machine avoiding any data copies.
  /// The method may only be called on the cluster node that stores the data.
  ///
  /// \deprecated This call is supposed to be removed soon as
  ///             it used to be a workaround in the past.
  ///
  /// \param[in] dice_transaction     The DiCE transaction used for this operation.
  ///
  /// \param[in] cluster_node_id      The index of the cluster machine that stores
  ///                                 a brick data.
  ///
  /// \param[in] index                The index of the bounding box that references
  ///                                 the brick of the subset of bricks.
  ///
  /// \param[out] brick_bounding_box  The bounding box of the brick data stored
  ///                                 locally. The bounding box may be larger than
  ///                                 the bounding box returned by \c get_bounding_box
  ///                                 because the raw brick data may be extended by
  ///                                 an additional voxel boundary.
  ///
  /// \return                         Returns a pointer to the amplitude values of the
  ///                                 local brick data.
  ///
  virtual mi::Uint8* access_local_data(mi::neuraylib::IDice_transaction* dice_transaction,
    mi::Uint32 cluster_node_id, mi::Uint32 index,
    mi::math::Bbox_struct<mi::Uint32, 3>& brick_bounding_box) const = 0;
};

/// @ingroup nv_index_data_access
/// The interface class exposes the locality information of a distributed regular heightfield
/// dataset.
///
/// The interface method \c IData_distribution::retrieve_data_locality()
/// returns the volume data locality.
///
///
/// \deprecated This interface class is subject to change!
///
class IRegular_heightfield_data_locality
  : public mi::base::Interface_declare<0xe40bd2c9, 0x0d82, 0x4e03, 0x9c, 0x46, 0x42, 0x87, 0x86,
      0xbb, 0xee, 0xdf, IDistributed_data_locality>
{
public:
  /// Creates means to edit the heightfield data stored locally on a cluster machine.
  /// The method may only be called on the cluster node that stores the data.
  ///
  /// \param[in] dice_transaction     The DiCE transaction used for this operation.
  /// \param[in] cluster_node_id      The index of the cluster node that stores
  ///                                 a certain patch data.
  /// \param[in] index                The index of the bounding box that references
  ///                                 the actual patch of the sub set of patches.
  ///
  /// \return                         Returns an instance of an implementation of
  ///                                 the interface class \c IRegular_heightfield_data_edit.
  ///
  ///
  virtual IRegular_heightfield_data_edit* create_data_edit(
    mi::neuraylib::IDice_transaction* dice_transaction, mi::Uint32 cluster_node_id,
    mi::Uint32 index) const = 0;
};

/// @ingroup nv_index_data_access
/// The interface class exposes the locality information of a distributed regular volume dataset.
///
/// The interface method \c IData_distribution::retrieve_data_locality()
/// returns the volume data locality.
///
///
/// \deprecated This interface class is subject to change!
///
class IIrregular_volume_data_locality
  : public mi::base::Interface_declare<0x1a783273, 0xea49, 0x4f86, 0x97, 0x44, 0x24, 0x5b, 0xb5,
      0xef, 0xe1, 0x9d, IDistributed_data_locality>
{
public:
  /// Creates means to edit the volume brick stored locally on a cluster node.
  /// The method may only be called on the cluster machine that stores the data.
  ///
  /// \param[in] dice_transaction     The DiCE transaction used that the tasks operates in.
  ///
  /// \param[in] cluster_node_id      The index of the cluster machine that stores
  ///                                 a certain brick data.
  ///
  /// \param[in] index                The index of the bounding box that references
  ///                                 the actual brick of the subset of bricks.
  ///
  /// \return                         Returns an NVIDIA IndeX instance of
  ///                                 the interface class \c IRegular_volume_data_edit
  ///                                 to edit the brick data contents.
  ///
  ///
  virtual IIrregular_volume_data_edit* create_data_edit(
    mi::neuraylib::IDice_transaction* dice_transaction, mi::Uint32 cluster_node_id,
    mi::Uint32 index) const = 0;

  /// The irregular volume data subset stored locally on a cluster node is
  /// defined inside its bounding box.
  /// The method allows iterating over all the bounding boxes
  /// on a cluster machine, e.g., to implement compute techniques.
  ///
  /// \param[in] cluster_node_id      The id that references a cluster node.
  ///                                 The index must be given in the range
  ///                                 from 0 to \c get_nb_bounding_box().
  ///
  /// \param[in] index                The index of the bounding box that references
  ///                                 the actual subset of the large-scale data
  ///                                 representation.
  ///
  /// \return                         The data subset's bounding
  ///                                 box in the scene element's local space.
  ///
  virtual const mi::math::Bbox_struct<mi::Float32, 3> get_data_subset_bounding_box(
    mi::Uint32 cluster_node_id, mi::Uint32 index) const = 0;
};

/// @ingroup nv_index_data_access
/// Interface class that exposes the data distribution in the cluster environment.
///
/// \deprecated This interface class is subject to change!
///
class IData_distribution : public mi::base::Interface_declare<0xc37caf77, 0xe632, 0x46ad, 0x8c,
                             0x19, 0x6d, 0x57, 0x56, 0x04, 0xda, 0x68, mi::neuraylib::IElement>
{
public:
  /// Query the distribution of volume data in the cluster. The returned
  /// instance of the class that implements interface \c IRegular_volume_data_locality
  /// provides the cluster nodes where parts of the queried data including their
  /// respective bounding boxes (brick bounding box) are stored.
  ///
  /// \param[in] scene_element_tag    The volume scene element tag that refers to
  ///                                 data representation whose distribution shall
  ///                                 be returned.
  /// \param[in] query_bbox           The bounding box in scene element's local space.
  ///                                 The data distribution will be exposed for the
  ///                                 user-defined bounding box passed to the query.
  /// \param[in] dice_transaction     The DiCE transaction that the operation runs in.
  ///
  /// \return                         Returns the data distribution scheme that
  ///                                 corresponds to the query parameters.
  ///
  virtual IRegular_volume_data_locality* retrieve_data_locality(
    mi::neuraylib::Tag_struct scene_element_tag,
    const mi::math::Bbox_struct<mi::Uint32, 3>& query_bbox,
    mi::neuraylib::IDice_transaction* dice_transaction) const = 0;

  /// Query the distribution of heightfield data in the cluster. The returned
  /// instance of the class that implements interface \c IRegular_heightfield_data_locality
  /// provides the cluster nodes where parts of the queried data including their
  /// respective 2D bounding boxes (patch bounding box) are stored.
  ///
  /// \param[in] scene_element_tag    The heightfield scene element tag that refers to
  ///                                 data representation whose distribution shall be
  ///                                 returned.
  /// \param[in] query_patch          The bounding box in scene element's local space.
  ///                                 The data distribution will be exposed for the
  ///                                 user-defined bounding box passed to the query.
  /// \param[in] dice_transaction     The DiCE transaction that the operation runs in.
  ///
  /// \return                         Returns the data distribution scheme that
  ///                                 corresponds to the query parameters.
  ///
  virtual IRegular_heightfield_data_locality* retrieve_data_locality(
    mi::neuraylib::Tag_struct scene_element_tag,
    const mi::math::Bbox_struct<mi::Uint32, 2>& query_patch,
    mi::neuraylib::IDice_transaction* dice_transaction) const = 0;

  /// Query the distribution of heightfield data in the cluster. The returned
  /// instance of the class that implements interface \c IRegular_heightfield_data_locality
  /// provides the cluster nodes where parts of the queried data including their
  /// respective 2D bounding boxes (patch bounding box) are stored.
  /// Distributed heightfield patches may cover the same heightfield data area and
  /// stored on multiple subregions along the z-direction (depth) in the scene.
  /// That is, this query in contrast to the previous one returns all heightfield patches
  /// in all intersected subregions, e.g., for applying cluster-wide editing
  /// operations.
  ///
  /// \param[in] scene_element_tag    The heightfield scene element tag that refers to
  ///                                 data representation whose distribution shall be
  ///                                 returned.
  /// \param[in] query_bbox           The bounding box in scene element's local space.
  ///                                 The data distribution will be exposed for the
  ///                                 user-defined bounding box passed to the query.
  /// \param[in] dice_transaction     The DiCE transaction that the operation runs in.
  ///
  /// \return                         Returns the data distribution scheme that
  ///                                 corresponds to the query parameters.
  ///
  virtual IRegular_heightfield_data_locality* retrieve_data_locality_for_editing(
    mi::neuraylib::Tag_struct scene_element_tag,
    const mi::math::Bbox_struct<mi::Uint32, 2>& query_bbox,
    mi::neuraylib::IDice_transaction* dice_transaction) const = 0;

  /// Query the distribution of irregular volume data in the cluster. The returned
  /// instance of the class that implements interface \c IRegular_volume_data_locality
  /// provides the cluster nodes where parts of the queried data including their
  /// respective bounding boxes (brick bounding box) are stored.
  ///
  /// \param[in] scene_element_tag    The volume scene element tag that refers to
  ///                                 data representation whose distribution shall
  ///                                 be returned.
  /// \param[in] query_bbox           The bounding box in scene element's local space.
  ///                                 The data distribution will be exposed for the
  ///                                 user-defined bounding box passed to the query.
  /// \param[in] dice_transaction     The DiCE transaction that the operation runs in.
  ///
  /// \return                         Returns the data distribution scheme that
  ///                                 corresponds to the query parameters.
  ///
  virtual IIrregular_volume_data_locality* retrieve_data_locality(
    mi::neuraylib::Tag_struct scene_element_tag,
    const mi::math::Bbox_struct<mi::Float32, 3>& query_bbox,
    mi::neuraylib::IDice_transaction* dice_transaction) const = 0;
};
}
} // namespace index / nv

#endif // NVIDIA_INDEX_IDATA_DISTRIBUTION_H
