#ifndef __XIOS_CDomain__
#define __XIOS_CDomain__

/// XIOS headers ///
#include "xios_spl.hpp"
#include "group_factory.hpp"

#include "declare_group.hpp"
#include "declare_ref_func.hpp"
#include "event_client.hpp"
#include "event_server.hpp"
#include "buffer_in.hpp"
#include "array_new.hpp"
#include "attribute_array.hpp"
#include "attribute_enum.hpp"
#include "transformation.hpp"
#include "transformation_enum.hpp"
#include "server_distribution_description.hpp"
#include "mesh.hpp"
#include "element.hpp"
#include "local_connector.hpp"
#include "scatterer_connector.hpp"
#include "gatherer_connector.hpp"
#include "distribution_type.hpp"


namespace xios {

   /// ////////////////////// Déclarations ////////////////////// ///

   class CDomainGroup;
   class CDomainAttributes;
   class CDomain;
   class CFile;

   ///--------------------------------------------------------------

   // Declare/Define CDomainAttribute
   BEGIN_DECLARE_ATTRIBUTE_MAP(CDomain)
#  include "domain_attribute.conf"
#  include "domain_attribute_private.conf"
   END_DECLARE_ATTRIBUTE_MAP(CDomain)

   ///--------------------------------------------------------------

   class CDomain
      : public CObjectTemplate<CDomain>
      , public CDomainAttributes
   {
     /// typedef ///
     typedef CObjectTemplate<CDomain>   SuperClass;
     typedef CDomainAttributes SuperClassAttribute;
     public:
         enum EEventId
         {
           EVENT_ID_INDEX, EVENT_ID_LON, EVENT_ID_LAT, 
           EVENT_ID_AREA,
           EVENT_ID_DATA_INDEX, EVENT_ID_SERVER_ATTRIBUT,
           EVENT_ID_DOMAIN_DISTRIBUTION, EVENT_ID_SEND_DISTRIBUTED_ATTRIBUTE
         } ;

      public:

         typedef CDomainAttributes RelAttributes;
         typedef CDomainGroup      RelGroup;
         typedef CTransformation<CDomain>::TransformationMapTypes TransMapTypes;

         /// Constructeurs ///
         CDomain(void);
         explicit CDomain(const StdString & id);
         CDomain(const CDomain & domain);       // Not implemented yet.
         CDomain(const CDomain * const domain); // Not implemented yet.

         static CDomain* createDomain();
         
         CMesh* mesh;
         void assignMesh(const StdString, const int);
        
         virtual void parse(xml::CXMLNode & node);

         void setContextClient(CContextClient* contextClient);

         /// Vérifications ///
         void checkAttributes(void);
         bool checkAttributes_done_ = false ;

         void checkAttributesOnClient();
         void checkAttributesOnClientAfterTransformation();
         void checkEligibilityForCompressedOutput(void);

         void sendCheckedAttributes();

         bool hasTransformation();
         void solveInheritanceTransformation();
         TransMapTypes getAllTransformations();
         void redistribute(int nbLocalDomain);
         void duplicateTransformation(CDomain*);
         CTransformation<CDomain>* addTransformation(ETranformationType transType, const StdString& id="");

      public:
         const std::set<StdString> & getRelFiles(void) const;
         bool IsWritten(const StdString & filename) const;
         bool isWrittenCompressed(const StdString& filename) const;
         
         int getNumberWrittenIndexes(MPI_Comm writtenCom);
         int getTotalNumberWrittenIndexes(MPI_Comm writtenCom);
         int getOffsetWrittenIndexes(MPI_Comm writtenCom);
         CArray<int,1>& getCompressedIndexToWriteOnServer(MPI_Comm writtenCom);

         std::map<int, StdSize> getAttributesBufferSize(CContextClient* client, bool bufferForWriting = false);

         bool isEmpty(void) const;
         bool isDistributed(void) const;
         bool isCompressible(void) const; 
 
         std::vector<int> getNbGlob();
         bool isEqual(CDomain* domain);

         static bool dispatchEvent(CEventServer& event);
      
      private:
         /** define if the domain is completed or not ie all attributes have been received before in case 
             of grid reading from file or coupling */ 
         bool isCompleted_=true ;  
      public:     
        /*!
           \brief Check if a domain is completed
           Before make any domain processing, we must be sure that all domain informations have
           been sent, for exemple when reading a grid in a file or when grid elements are sent by an
           other context (coupling). So all direct reference of the domain (domain_ref) must be also completed
           \return true if domain and domain reference are completed
          */
         bool isCompleted(void)
         {
           if (hasDirectDomainReference()) if (!getDirectDomainReference()->isCompleted()) return false;
           else return isCompleted_ ;
         }
         void setCompleted(void) { isCompleted_=true ; }
         void unsetCompleted(void) { isCompleted_=false ; }

      public:
         /// Mutateur ///
         void addRelFile(const StdString & filename);
         void addRelFileCompressed(const StdString& filename);            
         
         void computeWrittenIndex();
         void computeWrittenCompressedIndex(MPI_Comm);

         void AllgatherRectilinearLonLat(CArray<double,1>& lon, CArray<double,1>& lat,
                                         CArray<double,1>& lon_g, CArray<double,1>& lat_g);

         void fillInRectilinearBoundLonLat(CArray<double,1>& lon, CArray<double,1>& lat,
                                           CArray<double,2>& boundsLon, CArray<double,2>& boundsLat);
         
         void fillInLonLat();
         bool distributionAttributesHaveValue() const;

         size_t getGlobalWrittenSize() ;
         /// Destructeur ///
         virtual ~CDomain(void);

         /// Accesseurs statiques ///
         static StdString GetName(void);
         static StdString GetDefName(void);

         static ENodeType GetType(void);        

      public:
         CArray<double, 1> lonvalue, latvalue;
         CArray<double, 2> bounds_lonvalue, bounds_latvalue;
         CArray<double, 1> areavalue;

         CArray<int,1> localIndexToWriteOnServer;

         CArray<bool, 1> domainMask; // mask_1d, mask_2d -> domainMask
         CArray<bool, 1> localMask; // domainMask + indexing
         bool isCurvilinear ;
         bool hasBounds ;
         bool hasArea;
         bool hasLonLat;
         bool hasPole ;
         bool hasLatInReadFile_ ; // specify if latitude is defined on read file, so it can be read later when grid distribution will be defined
         bool hasBoundsLatInReadFile_ ; // specify if latitude boundarues are defined on read file, so it can be read later when grid distribution will be defined
         bool hasLonInReadFile_ ; // specify if longitude is defined on read file, so it can be read later when grid distribution will be defined
         bool hasBoundsLonInReadFile_ ; // specify if longitude boundaries are defined on read file, so it can be read later when grid distribution will be defined

         void computeLocalMask(void) ;
      
         void computeConnectedClients(CContextClient* client);  
         private: std::set<CContextClient*> computeConnectedClients_done_; public:
         /** The number of server of a context client. Avoid to re-compute indice computed in a previous computeConnectedClient */
         private: std::set<int> listNbServer_ ; public:
         
      private:
         void checkDomain(void);
         void checkLocalIDomain(void);
         void checkLocalJDomain(void);

         void checkMask(void);
         void checkDomainData(void);
         void checkCompression(void);

         void checkBounds(void);
         void checkArea(void);
         void checkLonLat();

         void setTransformations(const TransMapTypes&);         
         void computeNGlobDomain();
         
       public:
         void sendDomainToFileServer(CContextClient* client) ;
       private:
         std::set<CContextClient*> sendDomainToFileServer_done_ ;
       private:
         public:
         void sendDomainToCouplerOut(CContextClient* client, const string& fieldId, int posInGrid) ;
       private:
         std::set<CContextClient*> sendDomainToCouplerOut_done_ ;
      
       public:
        void makeAliasForCoupling(const string& fieldId, int posInGrid) ;

       private:

         void sendDomainDistribution(CContextClient* client, const string& domainId="") ; //for testing
         void sendAttributes(); // ym obsolete -> to be removed
         void sendIndex(CContextClient* client, const string& domainId="");
         void sendDistributionAttributes(CContextClient* client, const string& domainId="");
         void sendArea(CContextClient* client, const string& domainId="");
         void sendLonLat(CContextClient* client, const string& domainId="");         
         void sendDataIndex(CContextClient* client, const string& domainId="");
         void convertLonLatValue();
         void fillInRectilinearLonLat();
         void fillInCurvilinearLonLat();
         void fillInUnstructuredLonLat();
         
         static void recvDistributionAttributes(CEventServer& event);
         static void recvIndex(CEventServer& event);
         static void recvLon(CEventServer& event);
         static void recvLat(CEventServer& event);
         static void recvArea(CEventServer& event);
         static void recvDataIndex(CEventServer& event);
         void recvDistributionAttributes(CBufferIn& buffer);                  
         void recvIndex(std::map<int, CBufferIn*>& rankBuffers);         
         void recvLon(std::map<int, CBufferIn*>& rankBuffers);
         void recvLat(std::map<int, CBufferIn*>& rankBuffers);
         void recvArea(std::map<int, CBufferIn*>& rankBuffers);         
         void recvDataIndex(std::map<int, CBufferIn*>& rankBuffers);

         void completeLonLatClient(void);  
         
         
       private:         

/** Clients that have to send a domain. There can be multiple clients in case of secondary server, otherwise only one client. */
         std::list<CContextClient*> clients;
         std::set<CContextClient*> clientsSet;

         bool isChecked, computedWrittenIndex_;
         std::set<StdString> relFiles, relFilesCompressed;
         bool isClientChecked; // Verify whether all attributes of domain on the client side are good
         bool isClientAfterTransformationChecked;

/** global index of the domain on server side, sent by the clients. This is global index for lon, lat, mask elements (ie non masked elements)
    indGlobs_[rank] -> array of global index received from the client of rank "rank"
    indGlobs[rank](ind) -> global indices of the "ind" element sent.
    Defined only on server side
*/
         std::map<int, CArray<int,1> > indGlob_;

/** only on client sided : defined the number of clients which participate to a message sent to a server for longitude, lat, area, etc. attributes 
    nbSender[nbServers] --> first map is related to the server distribution (ie associated with the contextClient)
    nbSenders[nbServers][server_rank]-> return the number of participants of a message sent to the server of rank "server_rank"
*/
         std::map<int, map<int,int> > nbSenders; 

/** only on client side : Global index of each client sent to server: map<serverSize, map<serverRank, indexes>> 
    indSrv_[nbServers] -->  first map is related to the server distribution (ie associated with the contextClient)
    indSrv_[nbServers][server_rank] -> array of global index sent to the server of rank "server_rank"
    indSrv_[nbServers][server_rank](ind) --> global index on server of the local element "ind" sent (for lon, lat, mask, etc...) 
*/
         std::map<int, std::unordered_map<int, vector<size_t> > > indSrv_;
         
 /** make the mapping between the global index (the key) and the local index
     globalLocalIndexMap_[global_index] --> get the local index
 */        
         std::unordered_map<size_t,size_t> globalLocalIndexMap_;


/** only on server side : get the rank of each clients which participate to a received message
*   recvClientRanks_[num_receiver] : client rank of the receiver "num_receiver" 
*/
         std::vector<int> recvClientRanks_;

         std::map<int,int> numberWrittenIndexes_, totalNumberWrittenIndexes_, offsetWrittenIndexes_;
         std::map<int, CArray<int, 1> > compressedIndexToWriteOnServer;     
         std::map<int, std::vector<int> > connectedServerRank_;

         //! True if and only if the data defined on the domain can be outputted in a compressed way
         bool isCompressible_;
         bool isRedistributed_;
         TransMapTypes transformationMap_;         
         bool isUnstructed_;

       
       private:
         static bool initializeTransformationMap(std::map<StdString, ETranformationType>& m);
         static std::map<StdString, ETranformationType> transformationMapList_;
         static bool _dummyTransformationMapList;

       //////////////////////////////////////////////////////////////////////////////////////
       //  this part is related to distribution, element definition, views and connectors  //
       //////////////////////////////////////////////////////////////////////////////////////
       private:
         CLocalElement* localElement_ = nullptr ;
         void initializeLocalElement(void) ;
       
       public:  
         CLocalElement* getLocalElement(void) { if (localElement_==nullptr) initializeLocalElement() ; return localElement_ ; }
         CLocalView* getLocalView(CElementView::type type) { return getLocalElement()->getView(type) ;}
       
       private:  
         void addFullView(void) ;
         void addWorkflowView(void) ;
         void addModelView(void) ;
        
       private:
         CLocalConnector* modelToWorkflowConnector_ ;
         void computeModelToWorkflowConnector(void)  ;
       public:
         CLocalConnector* getModelToWorkflowConnector(void) { if (modelToWorkflowConnector_==nullptr) computeModelToWorkflowConnector() ; return modelToWorkflowConnector_ ;}

       public:
         void computeRemoteElement(CContextClient* client, EDistributionType) ;
         void distributeToServer(CContextClient* client, std::map<int, CArray<size_t,1>>& globalIndex, const string& domainId="") ;

         static void recvDomainDistribution(CEventServer& event) ;
         void receivedDomainDistribution(CEventServer& event, int phasis) ;

         void sendDistributedAttributes(CContextClient* client, CScattererConnector& scaterrerConnector, const string& domainId) ;
         static void recvDistributedAttributes(CEventServer& event) ;
         void recvDistributedAttributes(CEventServer& event, const string& type) ;
       private:
         map<CContextClient*, CDistributedElement*> remoteElement_ ;
       public: 
         CDistributedElement* getRemoteElement(CContextClient* client) {return remoteElement_[client] ;}
       private:
         map<CContextClient*, CScattererConnector*> clientToServerConnector_ ;
       public: 
         CScattererConnector* getClientToServerConnector(CContextClient* client) { return clientToServerConnector_[client] ;}
       
       private:
         CGathererConnector*  gathererConnector_ ;
         CGathererConnector* serverFromClientConnector_ ;
         CDistributedElement* elementFrom_ ;
       public:
         CGathererConnector* getServerFromClientConnector(void) { return serverFromClientConnector_ ;}

       private:
         CScattererConnector*  serverToClientConnector_ = nullptr ;
       public: 
         CScattererConnector* getServerToClientConnector(void) { return serverToClientConnector_ ;} 

       private:
         map<CContextClient*,CGathererConnector*>  clientFromServerConnector_  ;
       public: 
         CGathererConnector* getClientFromServerConnector(CContextClient* client) { return clientFromServerConnector_[client] ;}        
         

         DECLARE_REF_FUNC(Domain,domain)

   }; // class CDomain

   ///--------------------------------------------------------------

   // Declare/Define CDomainGroup and CDomainDefinition
   DECLARE_GROUP(CDomain);

   ///--------------------------------------------------------------

} // namespace xios

#endif //__XIOS_CDomain__