// Copyright(C) 1999-2017 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.
//
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#ifndef IOSS_Ioss_Region_h
#define IOSS_Ioss_Region_h

#include <Ioss_CoordinateFrame.h> // for CoordinateFrame
#include <Ioss_DatabaseIO.h>      // for DatabaseIO
#include <Ioss_EntityType.h>      // for EntityType, etc
#include <Ioss_GroupingEntity.h>  // for GroupingEntity
#include <Ioss_MeshType.h>
#include <Ioss_Property.h> // for Property
#include <Ioss_State.h>    // for State
#include <cstddef>         // for size_t, nullptr
#include <cstdint>         // for int64_t
#include <functional>      // for less
#include <iosfwd>          // for ostream
#include <map>             // for map, map<>::value_compare
#include <string>          // for string, operator<
#include <utility>         // for pair
#include <vector>          // for vector
namespace Ioss {
  class CommSet;
  class EdgeBlock;
  class EdgeSet;
  class ElementBlock;
  class ElementSet;
  class FaceBlock;
  class FaceSet;
  class Field;
  class NodeBlock;
  class NodeSet;
  class SideBlock;
  class SideSet;
  class StructuredBlock;
} // namespace Ioss
// Needed for node_global_to_local inline function.

namespace Ioss {

  class CoordinateFrame;

  using NodeBlockContainer    = std::vector<NodeBlock *>;
  using EdgeBlockContainer    = std::vector<EdgeBlock *>;
  using FaceBlockContainer    = std::vector<FaceBlock *>;
  using ElementBlockContainer = std::vector<ElementBlock *>;

  using NodeSetContainer    = std::vector<NodeSet *>;
  using EdgeSetContainer    = std::vector<EdgeSet *>;
  using FaceSetContainer    = std::vector<FaceSet *>;
  using ElementSetContainer = std::vector<ElementSet *>;

  using SideSetContainer         = std::vector<SideSet *>;
  using StructuredBlockContainer = std::vector<StructuredBlock *>;
  using CommSetContainer         = std::vector<CommSet *>;
  using StateTimeContainer       = std::vector<double>;

  using CoordinateFrameContainer = std::vector<CoordinateFrame>;

  using AliasMap = std::map<std::string, std::string, std::less<std::string>>;

  /** \brief A grouping entity that contains other grouping entities.
   *
   * Maintains a list of NodeBlocks, ElementBlocks, NodeLists, CommLists and Surfaces.
   * [Similar to the "Composite Pattern" in Design Patterns]  All interface to
   * GroupingEntities is through the Region class; clients of the IO subsystem have no direct
   * access to the underlying GroupingEntities (other than the Region).
   */
  class Region : public GroupingEntity
  {
  public:
    explicit Region(DatabaseIO *iodatabase = nullptr, const std::string &my_name = "");

    ~Region() override;

    std::string type_string() const override { return "Region"; }
    std::string short_type_string() const override { return "region"; }
    std::string contains_string() const override { return "Entities"; }
    EntityType  type() const override { return REGION; }

    MeshType          mesh_type() const;
    const std::string mesh_type_string() const;
    bool              node_major() const;

    void output_summary(std::ostream &strm, bool do_transient = true);

    bool supports_field_type(Ioss::EntityType fld_type) const;

    // Helper function...
    int64_t node_global_to_local(int64_t global, bool must_exist = true) const;

    bool begin_mode(State new_state);
    bool end_mode(State current_state);

    // Add a new state at this time, return state number
    virtual int add_state(double time)
    {
      IOSS_FUNC_ENTER(m_);
      return add_state__(time);
    }
    virtual int add_state__(double time);

    // Get time corresponding to specified state

    virtual double get_state_time(int state = -1) const;
    int            get_current_state() const;
    double         begin_state(int state);
    double         end_state(int state);

    /** \brief Determine whether the metadata defining the model (nontransient,
     *         geometry, and toploloty) has been set.
     *
     *  \returns True if the metadata defining the model has been set.
     */
    bool model_defined() const { return modelDefined; }

    /** \brief Determine whether the metadata related to the transient
     *         data has been set.
     *
     *  \returns True if the metadata related to the transient data has been set.
     */
    bool transient_defined() const { return transientDefined; }

    // Return a pair consisting of the step (1-based) corresponding to
    // the maximum time on the database and the corresponding maximum
    // time value. Note that this may not necessarily be the last step
    // on the database if cycle and overlay are being used.
    std::pair<int, double> get_max_time() const;

    // Return a pair consisting of the step (1-based) corresponding to
    // the minimum time on the database and the corresponding minimum
    // time value. Note that this may not necessarily be the first step
    // on the database if cycle and overlay are being used.
    std::pair<int, double> get_min_time() const;

    // Functions for an output region...
    bool add(NodeBlock *node_block);
    bool add(EdgeBlock *edge_block);
    bool add(FaceBlock *face_block);
    bool add(ElementBlock *element_block);
    bool add(SideSet *sideset);
    bool add(NodeSet *nodeset);
    bool add(EdgeSet *edgeset);
    bool add(FaceSet *faceset);
    bool add(ElementSet *elementset);
    bool add(CommSet *commset);
    bool add(StructuredBlock *structured_block);
    bool add(const CoordinateFrame &frame);

    const NodeBlockContainer &      get_node_blocks() const;
    const EdgeBlockContainer &      get_edge_blocks() const;
    const FaceBlockContainer &      get_face_blocks() const;
    const ElementBlockContainer &   get_element_blocks() const;
    const SideSetContainer &        get_sidesets() const;
    const NodeSetContainer &        get_nodesets() const;
    const EdgeSetContainer &        get_edgesets() const;
    const FaceSetContainer &        get_facesets() const;
    const ElementSetContainer &     get_elementsets() const;
    const CommSetContainer &        get_commsets() const;
    const StructuredBlockContainer &get_structured_blocks() const;
    const CoordinateFrameContainer &get_coordinate_frames() const;

    // Retrieve the Grouping Entity with the specified name.
    // Returns nullptr if the entity does not exist
    GroupingEntity * get_entity(const std::string &my_name, EntityType io_type) const;
    GroupingEntity * get_entity(const std::string &my_name) const;
    NodeBlock *      get_node_block(const std::string &my_name) const;
    EdgeBlock *      get_edge_block(const std::string &my_name) const;
    FaceBlock *      get_face_block(const std::string &my_name) const;
    ElementBlock *   get_element_block(const std::string &my_name) const;
    SideSet *        get_sideset(const std::string &my_name) const;
    SideBlock *      get_sideblock(const std::string &my_name) const;
    NodeSet *        get_nodeset(const std::string &my_name) const;
    EdgeSet *        get_edgeset(const std::string &my_name) const;
    FaceSet *        get_faceset(const std::string &my_name) const;
    ElementSet *     get_elementset(const std::string &my_name) const;
    CommSet *        get_commset(const std::string &my_name) const;
    StructuredBlock *get_structured_block(const std::string &my_name) const;

    const CoordinateFrame &get_coordinate_frame(int64_t id) const;

    // Add the name 'alias' as an alias for the database entity with the
    // name 'db_name'. Returns true if alias added; false if problems
    // adding alias.
    bool        add_alias(const std::string &db_name, const std::string &alias);
    bool        add_alias(const GroupingEntity *ge);
    std::string get_alias(const std::string &alias) const;
    std::string get_alias__(const std::string &alias) const; // Not locked by mutex

    const AliasMap &get_alias_map() const;

    /// Get a map containing all aliases defined for the entity with basename 'name'
    int get_aliases(const std::string &my_name, std::vector<std::string> &aliases) const;

    // This routine transfers all relavant aliases from the 'this'
    // region and applies them to the 'to' file.
    void transfer_mesh_aliases(Region *to) const;

    // Ensure that the 'this' region has the same ids and names as the 'from' region.
    void synchronize_id_and_name(const Region *from, bool sync_attribute_field_names = false);

    // Returns true if the passed in name refers to a known Entity
    // defined on this region.  If true, then 'type' (if non-nullptr) is
    // filled in with the type of the entity; if false, then type (if
    // non-nullptr) is set to 'INVALID' This function is defined to
    // consolidate several distinct implementations of this code in
    // client code. Because of this, the 'type' used in the client
    // code is repeated here instead of something more generic.
    bool is_valid_io_entity(const std::string &my_name, unsigned int io_type,
                            std::string *my_type = nullptr) const;

    // Retrieve the element block that contains the specified element
    // The 'local_id' is the local database id (1-based), not the global id.
    // returns nullptr if no element block contains this element (local_id <= 0
    // or greater than number of elements in database)
    ElementBlock *get_element_block(size_t local_id) const;

    // Retrieve the structured block that contains the specified node
    // The 'global_offset' is the global offset (0-based)
    // returns nullptr if no structured block contains this node (local_id <= 0
    // or greater than number of cell-nodes in database)
    StructuredBlock *get_structured_block(size_t global_offset) const;

    // Handle implicit properties -- These are calcuated from data stored
    // in the grouping entity instead of having an explicit value assigned.
    // An example would be 'element_block_count' for a region.
    Property get_implicit_property(const std::string &my_name) const override;

    const std::vector<std::string> &get_information_records() const;
    void                            add_information_records(const std::vector<std::string> &info);
    void                            add_information_record(const std::string &info);

    const std::vector<std::string> &get_qa_records() const;
    void add_qa_record(const std::string &code, const std::string &code_qa,
                       const std::string &date = "", const std::string &time = "");

  protected:
    int64_t internal_get_field_data(const Field &field, void *data,
                                    size_t data_size = 0) const override;

    int64_t internal_put_field_data(const Field &field, void *data,
                                    size_t data_size = 0) const override;

  private:
    // Add the name 'alias' as an alias for the database entity with the
    // name 'db_name'. Returns true if alias added; false if problems
    // adding alias. Not protected by mutex -- call internally only.
    bool add_alias__(const std::string &db_name, const std::string &alias);
    bool add_alias__(const GroupingEntity *ge);

    bool begin_mode__(State new_state);
    bool end_mode__(State current_state);

    void delete_database() override;

    AliasMap aliases_; ///< Stores alias mappings

    // Containers for all grouping entities
    NodeBlockContainer    nodeBlocks;
    EdgeBlockContainer    edgeBlocks;
    FaceBlockContainer    faceBlocks;
    ElementBlockContainer elementBlocks;

    NodeSetContainer    nodeSets;
    EdgeSetContainer    edgeSets;
    FaceSetContainer    faceSets;
    ElementSetContainer elementSets;

    SideSetContainer           sideSets;
    CommSetContainer           commSets;
    CoordinateFrameContainer   coordinateFrames;
    StructuredBlockContainer   structuredBlocks;
    mutable StateTimeContainer stateTimes;

    int         currentState;
    mutable int stateCount;
    bool        modelDefined;
    bool        transientDefined;
  };
} // namespace Ioss

/** \brief Get the index (1-based) of the currently-active state.
 *
 *  \returns The index.
 */
inline int Ioss::Region::get_current_state() const { return currentState; }

inline bool Ioss::Region::supports_field_type(Ioss::EntityType fld_type) const
{
  return static_cast<unsigned int>((get_database()->entity_field_support() & fld_type) != 0u) != 0u;
}

inline int64_t Ioss::Region::node_global_to_local(int64_t global, bool must_exist) const
{
  return get_database()->node_global_to_local(global, must_exist);
}

/** \brief Get all information records (informative strings) for the region's database.
 *
 *  \returns The informative strings.
 */
inline const std::vector<std::string> &Ioss::Region::get_information_records() const
{
  IOSS_FUNC_ENTER(m_);
  return get_database()->get_information_records();
}

/** \brief Add multiple information records (informative strings) to the region's database.
 *
 *  \param[in] info The strings to add.
 */
inline void Ioss::Region::add_information_records(const std::vector<std::string> &info)
{
  IOSS_FUNC_ENTER(m_);
  return get_database()->add_information_records(info);
}

/** \brief Add an information record (an informative string) to the region's database.
 *
 *  \param[in] info The string to add.
 */
inline void Ioss::Region::add_information_record(const std::string &info)
{
  IOSS_FUNC_ENTER(m_);
  return get_database()->add_information_record(info);
}

/** \brief Add a QA record, which consists of 4 strings, to the region's database
 *
 *  The 4 function parameters correspond to the 4 QA record strings.
 *
 *  \param[in] code A descriptive code name, such as the application that modified the database.
 *  \param[in] code_qa A descriptive string, such as the version of the application that modified
 * the database.
 *  \param[in] date A relevant date, such as the date the database was modified.
 *  \param[in] time A relevant time, such as the time the database was modified.
 */
inline void Ioss::Region::add_qa_record(const std::string &code, const std::string &code_qa,
                                        const std::string &date, const std::string &time)
{
  IOSS_FUNC_ENTER(m_);
  return get_database()->add_qa_record(code, code_qa, date, time);
}

/** \brief Get all QA records, each of which consists of 4 strings, from the region's database.
 *
 *  The 4 strings that make up a database QA record are:
 *
 *  1. A descriptive code name, such as the application that modified the database.
 *
 *  2. A descriptive string, such as the version of the application that modified the database.
 *
 *  3. A relevant date, such as the date the database was modified.
 *
 *  4. A relevant time, such as the time the database was modified.
 *
 *  \returns All QA records in a single vector. Every 4 consecutive elements of the
 *           vector make up a single QA record.
 */
inline const std::vector<std::string> &Ioss::Region::get_qa_records() const
{
  IOSS_FUNC_ENTER(m_);
  return get_database()->get_qa_records();
}

#endif
