/**
 * @file sntp.c
 * @brief Implementation of SNTP client module.
 */

#include "sntp.h"

#include "esp_sntp.h"
#include "esp_log.h"

#include <time.h>
#include <sys/time.h>

static const char *TAG = "sntp";

static volatile eSntpState sntpState = SYNC_NOT_STARTED;

static void time_sync_notification_cb(struct timeval *tv);

esp_err_t initSntp(void)
{
    esp_sntp_setoperatingmode(SNTP_OPMODE_POLL);
    esp_sntp_setservername(0, CONFIG_SNTP_SERVER_IP_ADDR);

    sntp_set_time_sync_notification_cb(time_sync_notification_cb);
    esp_sntp_init();

    ESP_LOGI(TAG, "Initialized successfully, server: %s", CONFIG_SNTP_SERVER_IP_ADDR);
    return ESP_OK;
}

eSntpState getSntpState(void)
{
    return sntpState;
}

/**
 * @brief SNTP time sync callback.
 * @param tv Synchronized time value.
 */
static void time_sync_notification_cb(struct timeval *tv)
{
    ESP_LOGI(TAG, "Time synchronized! Unix Time: %lld", tv->tv_sec);
    sntpState = SYNC_SUCCESSFUL;
}