#pragma once

#include "esp_err.h"
#include "freertos/FreeRTOS.h"
#include "freertos/event_groups.h"

/* Event bits set by the MQTT publisher into the shared event group */
#define MQTT_CONNECTED_BIT   BIT0
#define MQTT_CALIBRATE_START BIT1
#define MQTT_CALIBRATE_STOP  BIT2
#define MQTT_SELECTED_BIT    BIT3
#define MQTT_DESELECTED_BIT  BIT4

/**
 * Initialise and connect the MQTT client.
 *
 * sensor_id   — stable anchor ID string (e.g. "anchor_a1b2c3")
 * broker_uri  — e.g. "mqtt://192.168.1.100:1883"
 * evt_group   — FreeRTOS event group; publisher sets bits above on events
 */
esp_err_t mqtt_publisher_init(const char *sensor_id,
                               const char *broker_uri,
                               EventGroupHandle_t evt_group);

/** Publish an RSSI reading. Non-blocking (QoS 1). */
void mqtt_publisher_send_rssi(const char *tag_id, int8_t rssi);

/** Publish the announce message (empty payload). */
void mqtt_publisher_announce(void);