/**
 * NEURON IIoT System for Industry 4.0
 * Copyright (C) 2020-2021 EMQ Technologies Co., Ltd All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program 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.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 **/

#ifndef NEURON_OPCUA_HANDLE
#define NEURON_OPCUA_HANDLE

#ifdef __cplusplus
extern "C" {
#endif

#include <neuron.h>
#include <nng/nng.h>

#include "open62541_client.h"

typedef void (*cycle_response_callback)(neu_plugin_t *       plugin,
                                        neu_taggrp_config_t *config,
                                        neu_data_val_t *     resp_val);

typedef struct {
    neu_plugin_t *       plugin;
    open62541_client_t * client;
    neu_datatag_table_t *table;
    neu_node_id_t        self_node_id;
    neu_list             subscribe_list;
} opc_handle_context_t;

typedef struct {
    neu_list_node           node;
    neu_plugin_t *          plugin;
    neu_node_id_t           node_id;
    neu_taggrp_config_t *   config;
    char *                  name;
    nng_aio *               aio;
    cycle_response_callback cycle_cb;
    opc_handle_context_t *  context;
} opc_subscribe_tuple_t;

typedef enum {
    OPCUA_ERROR_SUCESS              = 0,
    OPCUA_ERROR_GROUP_CONFIG_NULL   = -1,
    OPCUA_ERROR_DATATAG_VECTOR_NULL = -2,
    OPCUA_ERROR_CLIENT_OFFLINE      = -3,
    OPCUA_ERROR_READ_FAIL           = -4,
    OPCUA_ERROR_ARRAY_NULL          = -5,
    OPCUA_ERROR_WRITE_FAIL          = -6,
    OPCUA_ERROR_ADD_SUBSCRIBE_FAIL  = -7,
    OPCUA_ERROR_DATATAG_NULL        = -10,
    OPCUA_ERROR_DATATAG_NOT_MATCH   = -11
} opcua_error_code_e;

opcua_error_code_e opcua_handle_read_once(opc_handle_context_t *context,
                                          neu_taggrp_config_t * config,
                                          neu_data_val_t *      resp_val);
opcua_error_code_e opcua_handle_write_value(opc_handle_context_t *context,
                                            neu_taggrp_config_t * config,
                                            neu_data_val_t *      write_val,
                                            neu_data_val_t *      resp_val);
opcua_error_code_e opcua_handle_subscribe(opc_handle_context_t *  context,
                                          neu_taggrp_config_t *   config,
                                          cycle_response_callback cycle_cb);
opcua_error_code_e opcua_handle_unsubscribe(opc_handle_context_t *context,
                                            neu_taggrp_config_t * config);
opcua_error_code_e opcua_handle_stop(opc_handle_context_t *context);

#ifdef __cplusplus
}
#endif
#endif