// Copyright(C) 1999-2022 National Technology & Engineering Solutions
// of Sandia, LLC (NTESS).  Under the terms of Contract DE-NA0003525 with
// NTESS, the U.S. Government retains certain rights in this software.
//
// See packages/seacas/LICENSE for details

#pragma once

#include <Ioss_CodeTypes.h>
#include <Ioss_DBUsage.h>      // for DatabaseUsage
#include <Ioss_DatabaseIO.h>   // for DatabaseIO
#include <Ioss_IOFactory.h>    // for IOFactory
#include <Ioss_Map.h>          // for Map
#include <Ioss_Region.h>       // for Region
#include <Ioss_State.h>        // for State
#include <Ioss_VariableType.h> // for VariableType
#include <atomic>              // for atomic
#include <cstddef>             // for size_t
#include <cstdint>             // for int64_t
#include <string>              // for string
#include <vector>              // for vector

#include "faodel-common/Common.hh"
#include "kelpie/Kelpie.hh"

namespace Ioss {
  class CommSet;
  class EdgeBlock;
  class EdgeSet;
  class ElementBlock;
  class ElementSet;
  class EntityBlock;
  class FaceBlock;
  class FaceSet;
  class Field;
  class GroupingEntity;
  class NodeBlock;
  class NodeSet;
  class PropertyManager;
  class Region;
  class SideBlock;
  class SideSet;
  class StructuredBlock;
} // namespace Ioss

/** \brief A namespace for the pamgen database format.
 */
namespace Iofaodel {

  class IOFactory : public Ioss::IOFactory
  {
  public:
    static const IOFactory *factory();

  private:
    IOFactory();
    Ioss::DatabaseIO *make_IO(const std::string &filename, Ioss::DatabaseUsage db_usage,
                              Ioss_MPI_Comm communicator, const Ioss::PropertyManager &properties) const;
  };

  class DatabaseIO : public Ioss::DatabaseIO
  {
  public:
    DatabaseIO(Ioss::Region *region, const std::string &filename, Ioss::DatabaseUsage db_usage,
               Ioss_MPI_Comm communicator, const Ioss::PropertyManager &properties);
    DatabaseIO(const DatabaseIO &from) = delete;
    DatabaseIO &operator=(const DatabaseIO &from) = delete;
    ~DatabaseIO();

    // TODO what should this be for Faodel?
    int int_byte_size_db() const override { return sizeof(int); }

    // Check capabilities of input/output database...  Returns an
    // unsigned int with the supported Ioss::EntityType or'ed
    // together. If "return_value & Ioss::EntityType" is set, then the
    // database supports that type (e.g. return_value & Ioss::FACESET)
    unsigned entity_field_support() const override { return 0; }

    std::string title() const { return databaseTitle; }
    int         spatial_dimension() const { return spatialDimension; }
    int         node_count() const { return nodeCount; }
    int         side_count() const { return 0; }
    int         element_count() const { return elementCount; }
    int         node_block_count() const { return nodeBlockCount; }
    int         element_block_count() const { return elementBlockCount; }
    int         sideset_count() const { return sidesetCount; }
    int         nodeset_count() const { return nodesetCount; }
    int         maximum_symbol_length() const override { return 32; }

    void compute_block_membership(Ioss::SideBlock          *efblock,
                                  std::vector<std::string> &block_membership) const;

    const std::string get_format() const override;

  private:
    bool put_properties() const;

    void finalize_database() const override;

    void read_meta_data__() override;

    bool begin_state__(int /* state */, double /* time */) override;
    bool end_state__(int /* state */, double /* time */) override;

    bool begin__(Ioss::State state) override
    {
      dbState = state;
      return true;
    };
    bool end__(Ioss::State state) override
    {
      dbState = Ioss::STATE_UNKNOWN;
      return true;
    };

    void read_region();
    void read_entity_properties(kelpie::ObjectCapacities oc, Ioss::GroupingEntity &entity);
    Ioss::Property read_property(lunasa::DataObject &ldo);
    void           read_entity_fields(kelpie::ObjectCapacities oc, Ioss::GroupingEntity &entity);

    void read_communication_metadata();

    /*
     * TODO identify all the get_*{blocks|sets} needed here
     */
    void get_step_times__() override;

    void get_edgeblocks();
    void get_elemblocks();
    void get_faceblocks();
    void get_nodeblocks();
    void get_structuredblocks();

    void get_edgesets();
    void get_elemsets();
    void get_facesets();
    void get_nodesets();
    void get_sidesets();
    void get_commsets();

    int get_side_connectivity(const Ioss::SideBlock *fb, int id, int side_count, int *fconnect,
                              size_t data_size) const;
    int get_side_distributions(const Ioss::SideBlock *fb, int id, int side_count, double *dist_fact,
                               size_t data_size) const;

    const Ioss::Map &get_node_map() const;
    const Ioss::Map &get_element_map() const;

    int64_t get_field_internal(const Ioss::Region *reg, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t get_field_internal(const Ioss::NodeBlock *nb, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t get_field_internal(const Ioss::EdgeBlock *nb, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t get_field_internal(const Ioss::FaceBlock *nb, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t get_field_internal(const Ioss::ElementBlock *eb, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t get_field_internal(const Ioss::SideBlock *fb, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t get_field_internal(const Ioss::NodeSet *ns, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t get_field_internal(const Ioss::EdgeSet *ns, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t get_field_internal(const Ioss::FaceSet *ns, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t get_field_internal(const Ioss::ElementSet *ns, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t get_field_internal(const Ioss::SideSet *fs, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t get_field_internal(const Ioss::CommSet *cs, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t get_field_internal(const Ioss::StructuredBlock *sb, const Ioss::Field &field,
                               void *data, size_t data_size) const override;
    int64_t get_field_internal(const Ioss::Assembly *a, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t get_field_internal(const Ioss::Blob *b, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::Region *reg, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::NodeBlock *nb, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::EdgeBlock *nb, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::FaceBlock *nb, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::ElementBlock *eb, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::SideBlock *fb, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::NodeSet *ns, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::EdgeSet *ns, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::FaceSet *ns, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::ElementSet *ns, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::SideSet *fs, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::CommSet *cs, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::StructuredBlock *sb, const Ioss::Field &field,
                               void *data, size_t data_size) const override;
    int64_t put_field_internal(const Ioss::Assembly *a, const Ioss::Field &field, void *data,
                               size_t data_size) const override;
    int64_t put_field_internal(const Ioss::Blob *b, const Ioss::Field &field, void *data,
                               size_t data_size) const override;

    std::string databaseTitle;

    int spatialDimension;

    int nodeBlockCount;
    int elementBlockCount;
    int nodesetCount;
    int sidesetCount;

    // KEEP track of how many instances of this object exist, since each implicitly
    // relies on a running instance of Faodel.
    static std::atomic<int> instanceCount;

    // Communication Set Data
    Ioss::IntVector nodeCmapIds;
    Ioss::IntVector nodeCmapNodeCnts;
    Ioss::IntVector elemCmapIds;
    Ioss::IntVector elemCmapElemCnts;
    int             commsetNodeCount;
    int             commsetElemCount;

    // Faodel helpers
    int64_t get_field_internal(const Ioss::GroupingEntity &e, const Ioss::Field &field, void *data,
                               size_t data_size) const;

    int64_t put_field_internal(const Ioss::GroupingEntity &e, const Ioss::Field &field, void *data,
                               size_t data_size) const;

    mutable kelpie::Pool  pool;
    faodel::Configuration faodel_config;

    using PropertyPair = std::pair<std::string, bool>;
    std::vector<PropertyPair> property_publish_state;
  };
} // namespace Iofaodel
