#ifndef SENDS_H
#define SENDS_H

#include "pico/cyw43_arch.h"
#include "pico/util/pheap.h"

typedef struct {
  uint32_t timestamp;
  u16_t seq;
  u8_t send_count;
} send_t;

bool next_send_less_than(void *user_data, pheap_node_id_t a, pheap_node_id_t b);

void create_send(send_t *sleeping_sends, pheap_t *sleeps_heap,
                 uint32_t timestamp, u16_t seq);

/* When do we next need to send something (in seconds since boot)?
 * Returns -1 if there's nothing pending. */
int32_t next_scheduled_send(send_t *sleeping_sends, pheap_t *sleeps_heap);

#endif