/**
 * @file
 * @brief BACNet secure connect node API.
 *        In general, user should not use that API directly,
 *        BACNet/SC datalink API should be used.
 * @author Kirill Neznamov <kirill\.neznamov@dsr-corporation\.com>
 * @date October 2022
 * @copyright SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0
 */
#ifndef BACNET_DATALINK_BSC_NODE_H
#define BACNET_DATALINK_BSC_NODE_H
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
/* BACnet Stack defines - first */
#include "bacnet/bacdef.h"
/* BACnet Stack API */
#include "bacnet/datalink/bsc/bsc-conf.h"
#include "bacnet/datalink/bsc/bsc-retcodes.h"
#include "bacnet/datalink/bsc/bvlc-sc.h"
#include "bacnet/basic/sys/mstimer.h"
#include "bacnet/basic/object/sc_netport.h"

typedef struct BSC_Node BSC_NODE;

typedef enum {
    BSC_NODE_EVENT_STARTED = 1,
    BSC_NODE_EVENT_STOPPED = 2,
    BSC_NODE_EVENT_RESTARTED = 3,
    BSC_NODE_EVENT_RECEIVED_NPDU = 4,
    BSC_NODE_EVENT_RECEIVED_RESULT = 5,
    BSC_NODE_EVENT_RECEIVED_ADVERTISIMENT = 6,
    BSC_NODE_EVENT_DIRECT_CONNECTED = 7,
    BSC_NODE_EVENT_DIRECT_DISCONNECTED = 8
} BSC_NODE_EVENT;

typedef void (*BSC_NODE_EVENT_FUNC)(
    BSC_NODE *node,
    BSC_NODE_EVENT ev,
    BACNET_SC_VMAC_ADDRESS *dest,
    uint8_t *pdu,
    size_t pdu_len);
typedef struct {
    bool used;
    BACNET_SC_VMAC_ADDRESS vmac;
    uint8_t utf8_urls[BSC_CONF_NODE_MAX_URIS_NUM_IN_ADDRESS_RESOLUTION_ACK]
                     [BSC_CONF_NODE_MAX_URI_SIZE_IN_ADDRESS_RESOLUTION_ACK + 1];
    size_t urls_num;
    struct mstimer fresh_timer;
} BSC_ADDRESS_RESOLUTION;

typedef struct {
    uint8_t *ca_cert_chain;
    size_t ca_cert_chain_size;
    uint8_t *cert_chain;
    size_t cert_chain_size;
    uint8_t *key;
    size_t key_size;
    BACNET_SC_UUID *local_uuid;
    BACNET_SC_VMAC_ADDRESS local_vmac;
    uint16_t max_local_bvlc_len;
    uint16_t max_local_npdu_len;
    uint16_t connect_timeout_s;
    uint16_t heartbeat_timeout_s;
    uint16_t disconnect_timeout_s;
    uint16_t reconnnect_timeout_s;
    uint16_t address_resolution_timeout_s;
    uint16_t address_resolution_freshness_timeout_s;
    char *primaryURL;
    char *failoverURL;
    uint16_t hub_server_port;
    uint16_t direct_server_port;
    char *hub_iface;
    char *direct_iface;
    bool direct_connect_accept_enable;
    bool direct_connect_initiate_enable;
    bool hub_function_enabled;
    char *direct_connection_accept_uris; /* URIs joined ' 'space */
    size_t direct_connection_accept_uris_len;
    BSC_NODE_EVENT_FUNC event_func;
} BSC_NODE_CONF;

BACNET_STACK_EXPORT
BSC_SC_RET bsc_node_init(BSC_NODE_CONF *conf, BSC_NODE **node);

BACNET_STACK_EXPORT
BSC_SC_RET bsc_node_deinit(BSC_NODE *node);

BACNET_STACK_EXPORT
BSC_SC_RET bsc_node_start(BSC_NODE *node);

BACNET_STACK_EXPORT
void bsc_node_stop(BSC_NODE *node);

BACNET_STACK_EXPORT
BSC_SC_RET bsc_node_send(BSC_NODE *node, uint8_t *pdu, size_t pdu_len);

BACNET_STACK_EXPORT
BSC_ADDRESS_RESOLUTION *
bsc_node_get_address_resolution(void *node, BACNET_SC_VMAC_ADDRESS *vmac);

BACNET_STACK_EXPORT
BSC_SC_RET
bsc_node_send_address_resolution(void *node, BACNET_SC_VMAC_ADDRESS *dest);

BACNET_STACK_EXPORT
BSC_SC_RET
bsc_node_hub_connector_send(void *user_arg, uint8_t *pdu, size_t pdu_len);

BACNET_STACK_EXPORT
BSC_SC_RET bsc_node_connect_direct(
    BSC_NODE *node, BACNET_SC_VMAC_ADDRESS *dest, char **urls, size_t urls_cnt);

BACNET_STACK_EXPORT
void bsc_node_disconnect_direct(BSC_NODE *node, BACNET_SC_VMAC_ADDRESS *dest);

BACNET_STACK_EXPORT
BACNET_SC_HUB_CONNECTOR_STATE
bsc_node_hub_connector_state(BSC_NODE *node);

BACNET_STACK_EXPORT
BACNET_SC_HUB_CONNECTION_STATUS *
bsc_node_hub_connector_status(BSC_NODE *node, bool primary);

BACNET_STACK_EXPORT
bool bsc_node_direct_connection_established(
    BSC_NODE *node, BACNET_SC_VMAC_ADDRESS *dest, char **urls, size_t urls_cnt);

BACNET_STACK_EXPORT
void bsc_node_maintenance_timer(uint16_t seconds);

BACNET_STACK_EXPORT
BACNET_SC_HUB_FUNCTION_CONNECTION_STATUS *
bsc_node_hub_function_status(BSC_NODE *node, size_t *cnt);

BACNET_STACK_EXPORT
BACNET_SC_DIRECT_CONNECTION_STATUS *
bsc_node_direct_connection_status(BSC_NODE *node, size_t *cnt);

BACNET_STACK_EXPORT
void bsc_node_store_failed_request_info(
    BSC_NODE *node,
    BACNET_HOST_N_PORT_DATA *peer,
    BACNET_SC_VMAC_ADDRESS *vmac,
    BACNET_SC_UUID *uuid,
    BACNET_ERROR_CODE error,
    const char *error_desc);

BACNET_STACK_EXPORT
BACNET_SC_FAILED_CONNECTION_REQUEST *
bsc_node_failed_requests_status(BSC_NODE *node, size_t *cnt);

BACNET_STACK_EXPORT
BACNET_SC_DIRECT_CONNECTION_STATUS *bsc_node_find_direct_status_for_vmac(
    BSC_NODE *node, BACNET_SC_VMAC_ADDRESS *vmac);

BACNET_STACK_EXPORT
BACNET_SC_HUB_FUNCTION_CONNECTION_STATUS *
bsc_node_find_hub_status_for_vmac(BSC_NODE *node, BACNET_SC_VMAC_ADDRESS *vmac);

#endif