// SPDX-License-Identifier: GPL-3.0-or-later
#ifndef ACLK_UTIL_H
#define ACLK_UTIL_H

#include "libnetdata/libnetdata.h"

#ifdef ENABLE_ACLK
#include "mqtt_websockets/mqtt_wss_client.h"

#define CLOUD_EC_MALFORMED_NODE_ID   1
#define CLOUD_EMSG_MALFORMED_NODE_ID "URL requests node_id but there is not enough chars following (for it to be valid uuid)."
#define CLOUD_EC_NODE_NOT_FOUND      2
#define CLOUD_EMSG_NODE_NOT_FOUND    "Node with requested node_id not found"
#define CLOUD_EC_ZLIB_ERROR          3
#define CLOUD_EMSG_ZLIB_ERROR        "Error during zlib compression"
#define CLOUD_EC_REQ_REPLY_TOO_BIG   4
#define CLOUD_EMSG_REQ_REPLY_TOO_BIG "Request reply produces message bigger than allowed maximum"
#define CLOUD_EC_FAIL_TOPIC          5
#define CLOUD_EMSG_FAIL_TOPIC        "Internal Topic Error"
#define CLOUD_EC_SND_TIMEOUT         6
#define CLOUD_EMSG_SND_TIMEOUT       "Timeout sending binpacked message"

// Helper stuff which should not have any further inside ACLK dependency
// and are supposed not to be needed outside of ACLK
extern usec_t aclk_session_newarch;

extern int chart_batch_id;

typedef enum {
    ACLK_ENC_UNKNOWN = 0,
    ACLK_ENC_JSON,
    ACLK_ENC_PROTO
} aclk_encoding_type_t;

typedef enum {
    ACLK_TRP_UNKNOWN = 0,
    ACLK_TRP_MQTT_3_1_1,
    ACLK_TRP_MQTT_5
} aclk_transport_type_t;

typedef struct {
    char *endpoint;
    aclk_transport_type_t type;
} aclk_transport_desc_t;

typedef struct {
    int base;
    int max_s;
    int min_s;
} aclk_backoff_t;

typedef struct {
    char *auth_endpoint;
    aclk_encoding_type_t encoding;

    aclk_transport_desc_t **transports;
    size_t transport_count;

    char **capabilities;
    size_t capability_count;

    aclk_backoff_t backoff;
} aclk_env_t;

extern aclk_env_t *aclk_env;

aclk_encoding_type_t aclk_encoding_type_t_from_str(const char *str);
aclk_transport_type_t aclk_transport_type_t_from_str(const char *str);

void aclk_transport_desc_t_destroy(aclk_transport_desc_t *trp_desc);
void aclk_env_t_destroy(aclk_env_t *env);
int aclk_env_has_capa(const char *capa);

enum aclk_topics {
    ACLK_TOPICID_UNKNOWN               = 0,
    ACLK_TOPICID_CHART                 = 1,
    ACLK_TOPICID_ALARMS                = 2,
    ACLK_TOPICID_METADATA              = 3,
    ACLK_TOPICID_COMMAND               = 4,
    ACLK_TOPICID_AGENT_CONN            = 5,
    ACLK_TOPICID_CMD_NG_V1             = 6,
    ACLK_TOPICID_CREATE_NODE           = 7,
    ACLK_TOPICID_NODE_CONN             = 8,
    ACLK_TOPICID_CHART_DIMS            = 9,
    ACLK_TOPICID_CHART_CONFIGS_UPDATED = 10,
    ACLK_TOPICID_CHART_RESET           = 11,
    ACLK_TOPICID_RETENTION_UPDATED     = 12,
    ACLK_TOPICID_NODE_INFO             = 13,
    ACLK_TOPICID_ALARM_LOG             = 14,
    ACLK_TOPICID_ALARM_CHECKPOINT      = 15,
    ACLK_TOPICID_ALARM_CONFIG          = 16,
    ACLK_TOPICID_ALARM_SNAPSHOT        = 17,
    ACLK_TOPICID_NODE_COLLECTORS       = 18,
    ACLK_TOPICID_CTXS_SNAPSHOT         = 19,
    ACLK_TOPICID_CTXS_UPDATED          = 20
};

typedef size_t aclk_topic_cache_iter_t;
#define ACLK_TOPIC_CACHE_ITER_T_INITIALIZER (0)

const char *aclk_get_topic(enum aclk_topics topic);
int aclk_generate_topic_cache(struct json_object *json);
void free_topic_cache(void);
const char *aclk_topic_cache_iterate(aclk_topic_cache_iter_t *iter);
// TODO
// aclk_topics_reload //when claim id changes

#ifdef ACLK_LOG_CONVERSATION_DIR
extern volatile int aclk_conversation_log_counter;
#define ACLK_GET_CONV_LOG_NEXT() __atomic_fetch_add(&aclk_conversation_log_counter, 1, __ATOMIC_SEQ_CST)
#endif

unsigned long int aclk_tbeb_delay(int reset, int base, unsigned long int min, unsigned long int max);
#define aclk_tbeb_reset(x) aclk_tbeb_delay(1, 0, 0, 0)

void aclk_set_proxy(char **ohost, int *port, char **uname, char **pwd, enum mqtt_wss_proxy_type *type);
#endif /* ENABLE_ACLK */

int base64_encode_helper(unsigned char *out, int *outl, const unsigned char *in, int in_len);

#endif /* ACLK_UTIL_H */
