/**
 * @file heartbeat.h
 * @brief HTTP Heartbeat Loop
 */

#ifndef HEARTBEAT_H
#define HEARTBEAT_H

#include <esp_err.h>
#include <stdint.h>
#include <stdbool.h>
#include "config.h"

/**
 * @brief Send heartbeat to server
 * 
 * @param config Device configuration
 * @param status Device status ("connected", "recovering", "stopped")
 * @param tunnel_up WireGuard tunnel status
 * @param last_handshake Last handshake timestamp (epoch seconds)
 * @return esp_err_t ESP_OK on success
 */
esp_err_t heartbeat_send(const wg_config_t *config, const char *status,
                        bool tunnel_up, int64_t last_handshake);

/**
 * @brief Check if config changed based on hash comparison
 * 
 * @param old_hash Previous config hash
 * @param new_hash New config hash
 * @return true if config changed, false otherwise
 */
bool heartbeat_config_changed(const char *old_hash, const char *new_hash);

#endif /* HEARTBEAT_H */