#ifndef __MEDIUM_H
#define __MEDIUM_H

#include <stdbool.h>
#include <stdint.h>

#include <sys/epoll.h>

/*
 * Type definitions
 */
typedef bool (*cbmed_on_init_t)();
typedef void (*cbmed_on_deinit_t)();
typedef void (*cbmed_on_timer_t)(uint32_t id);
typedef void (*cbmed_on_fd_event_t)(int fd, uint32_t events);
typedef int32_t (*cbmed_on_send_data_t)(const void *data, int32_t size);

/*
 * Public API
 */
// Set callbacks to use to utilize medium.
void medium_set_callbacks(
    cbmed_on_init_t on_init,
    cbmed_on_deinit_t on_deinit,
    cbmed_on_timer_t on_timer,
    cbmed_on_fd_event_t on_fd_event,
    cbmed_on_send_data_t on_send_data
);

// Modify epoll.
// Remarks:
//  - see `man epoll_ctl`
void medium_epoll_ctl(int op, int fd, struct epoll_event *ev);

// Use this when you have received data from medium.
// Parameters:
//  - data      - data you received
//  - size      - size of data
void medium_on_recv_data(const void *data, int32_t size);

// Call when you become ready/not ready to send data.
// Parameters:
//  - state     - true = ready; false = not ready
void medium_set_ready_to_send(bool state);

// Set max size of data you are ready to accept for sending.
// Parameters:
//  - size      - size of data
void medium_set_max_send_size(int32_t size);

// Start timer.
// Parameters:
//  - id        - timer ID
//  - ms        - milliseconds to wait
void medium_start_timer(uint32_t id, int32_t ms);

#endif