#pragma once

#include "esp_err.h"
#include "freertos/FreeRTOS.h"
#include "freertos/event_groups.h"
#include <stdint.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
#define MQTT_FACTORY_RESET_BIT        BIT5
#define MQTT_RECONFIGURE_SETTINGS_BIT BIT6
#define MQTT_OTA_BIT                  BIT7

/* Populated by handle_cmd() before MQTT_RECONFIGURE_SETTINGS_BIT is set.
 * All fields are optional — empty string means "not provided, leave unchanged". */
typedef struct {
    char     ssid[32];
    char     password[64];
    char     mqtt_host[128];
    uint16_t mqtt_port;
} mqtt_reconfigure_data_t;

/** Returns a pointer to the last parsed reconfigure payload. Valid only after
 *  MQTT_RECONFIGURE_SETTINGS_BIT fires; must be read before the next MQTT event. */
const mqtt_reconfigure_data_t *mqtt_publisher_get_reconfigure_data(void);

typedef struct {
    char url[256];
    char version[32];
} mqtt_ota_data_t;

/** Returns a pointer to the last parsed OTA payload. Valid only after
 *  MQTT_OTA_BIT fires; must be read before the next MQTT event. */
const mqtt_ota_data_t *mqtt_publisher_get_ota_data(void);

/** Publish OTA status to localiser/sensor/{id}/ota. Non-blocking (QoS 1). */
void mqtt_publisher_send_ota_status(const char *status, const char *version);

/**
 * 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 a parsed beacon reading with type, id, tx_power and rssi. Non-blocking (QoS 1). */
void mqtt_publisher_send_beacon(const char *type, const char *id, int8_t tx_power, int8_t rssi);

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