/*
 * Copyright (C) 2014 the contributors as stated in the AUTHORS file
 *
 * This file is part of open62541. open62541 is free software: you can
 * redistribute it and/or modify it under the terms of the GNU Lesser General
 * Public License, version 3 (as published by the Free Software Foundation) with
 * a static linking exception as stated in the LICENSE file provided with
 * open62541.
 *
 * open62541 is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

#ifndef UA_SERVER_H_
#define UA_SERVER_H_

#ifdef __cplusplus
extern "C" {
#endif

#include "ua_types.h"
#include "ua_types_generated.h"
#include "ua_connection.h"
#include "ua_log.h"

/** @defgroup server Server */

struct UA_Server;
typedef struct UA_Server UA_Server;

UA_Server UA_EXPORT * UA_Server_new(UA_String *endpointUrl, UA_ByteString *serverCertificate);
void UA_EXPORT UA_Server_delete(UA_Server *server);
void UA_EXPORT UA_Server_processBinaryMessage(UA_Server *server, UA_Connection *connection, const UA_ByteString *msg);

/* Services for local use */
UA_AddNodesResult UA_EXPORT UA_Server_addNode(UA_Server *server, const UA_Node **node,
                                              const UA_ExpandedNodeId *parentNodeId,
                                              const UA_NodeId *referenceTypeId);
UA_StatusCode UA_EXPORT UA_Server_addReference(UA_Server *server, const UA_AddReferencesItem *item);
void UA_EXPORT UA_Server_addScalarVariableNode(UA_Server *server, UA_QualifiedName *browseName, void *value,
                                               const UA_VTable_Entry *vt, const UA_ExpandedNodeId *parentNodeId,
                                               const UA_NodeId *referenceTypeId );

/** @ingroup server

    @defgroup external_nodestore External Nodestore

    To plug in outside data sources, one can use

    - VariableNodes with a data source (functions that are called for read and write access)
    - An external nodestore that is mapped to specific namespaces

    If no external nodestore is defined for a nodeid, it is always looked up in
    the "local" nodestore of open62541. Namespace Zero is always in the local nodestore.
*/

typedef UA_Int32 (*UA_ExternalNodeStore_addNodes)(void *ensHandle, const UA_RequestHeader *requestHeader, UA_AddNodesItem *nodesToAdd,
                                                  UA_UInt32 *indices,UA_UInt32 indicesSize, UA_AddNodesResult* addNodesResults,
                                                  UA_DiagnosticInfo *diagnosticInfos);
typedef UA_Int32 (*UA_ExternalNodeStore_addReferences)(void *ensHandle, const UA_RequestHeader *requestHeader, UA_AddReferencesItem* referencesToAdd,
                                                       UA_UInt32 *indices,UA_UInt32 indicesSize, UA_StatusCode *addReferencesResults,
                                                       UA_DiagnosticInfo *diagnosticInfos);
typedef UA_Int32 (*UA_ExternalNodeStore_deleteNodes)(void *ensHandle, const UA_RequestHeader *requestHeader, UA_DeleteNodesItem *nodesToDelete, UA_UInt32 *indices,
                                                     UA_UInt32 indicesSize, UA_StatusCode *deleteNodesResults, UA_DiagnosticInfo *diagnosticInfos);
typedef UA_Int32 (*UA_ExternalNodeStore_deleteReferences)(void *ensHandle, const UA_RequestHeader *requestHeader, UA_DeleteReferencesItem *referenceToDelete,
                                                          UA_UInt32 *indices, UA_UInt32 indicesSize, UA_StatusCode deleteReferencesresults,
                                                          UA_DiagnosticInfo *diagnosticInfos);
typedef UA_Int32 (*UA_ExternalNodeStore_readNodes)(void *ensHandle, const UA_RequestHeader *requestHeader, UA_ReadValueId *readValueIds, UA_UInt32 *indices,
                                                   UA_UInt32 indicesSize,UA_DataValue *readNodesResults, UA_Boolean timeStampToReturn, UA_DiagnosticInfo *diagnosticInfos);
typedef UA_Int32 (*UA_ExternalNodeStore_writeNodes)(void *ensHandle, const UA_RequestHeader *requestHeader, UA_WriteValue *writeValues, UA_UInt32 *indices,
                                                    UA_UInt32 indicesSize, UA_StatusCode *writeNodesResults, UA_DiagnosticInfo *diagnosticInfo);
typedef UA_Int32 (*UA_ExternalNodeStore_browseNodes)(void *ensHandle, const UA_RequestHeader *requestHeader, UA_BrowseDescription *browseDescriptions, UA_UInt32 *indices,
                                                     UA_UInt32 indicesSize, UA_UInt32 requestedMaxReferencesPerNode, UA_BrowseResult *browseResults, UA_DiagnosticInfo *diagnosticInfos);
typedef UA_Int32 (*UA_ExternalNodeStore_delete)(void *ensHandle);

typedef struct UA_ExternalNodeStore {
    void *ensHandle;
	UA_ExternalNodeStore_addNodes addNodes;
	UA_ExternalNodeStore_deleteNodes deleteNodes;
	UA_ExternalNodeStore_writeNodes writeNodes;
	UA_ExternalNodeStore_readNodes readNodes;
	UA_ExternalNodeStore_browseNodes browseNodes;
	UA_ExternalNodeStore_addReferences addReferences;
	UA_ExternalNodeStore_deleteReferences deleteReferences;
	UA_ExternalNodeStore_delete delete;
} UA_ExternalNodeStore;

UA_StatusCode UA_EXPORT UA_Server_addExternalNamespace(UA_Server *server, UA_UInt16 namespaceIndex, UA_ExternalNodeStore *nodeStore);

#ifdef __cplusplus
} // extern "C"
#endif

#endif /* UA_SERVER_H_ */