#pragma once
#include <cstdint>
#include <span>
#include "eth.h"
#include "ipv4.h"
#include "span_writer.h"
#include "callback_list.h"

struct net_state {
    eth::mac_addr mac;
    ipv4::ip4_addr ip;
};

using net_frame_callback = bool (*)(std::span<const uint8_t> frame);

using frame_cb_list = callback_list<net_frame_callback, 16>;
using frame_cb_handle = frame_cb_list::node*;

using ethertype_handler = void (*)(std::span<const uint8_t> frame, span_writer& tx);

inline constexpr uint16_t PICOMAP_PORT_BE = __builtin_bswap16(28781);

bool net_init();
const net_state& net_get_state();
frame_cb_handle net_add_frame_callback(net_frame_callback cb);
void net_remove_frame_callback(frame_cb_handle h);
void net_poll(std::span<uint8_t> tx);
void net_send_raw(std::span<const uint8_t> data);
void net_register_ethertype(uint16_t ethertype_be, ethertype_handler fn);