#pragma once
#include <array>
#include <cstdint>
#include <expected>
#include <span>

namespace w6300 {

constexpr int sock_count = 8;

enum class socket_id : uint8_t {};

enum class sock_error : int16_t {
    busy           =     0,
    sock_num       =    -1,
    sock_closed    =    -4,
    sock_mode      =    -5,
    arg            =   -10,
    timeout        =   -13,
    data_len       =   -14,
    fatal_packlen  = -1001,
};

enum class protocol : uint8_t {
    macraw    = 0x07,
};

enum class sock_flag : uint8_t {
    none            = 0,
};

enum intr_kind : uint32_t {
    ik_pppoe_terminated = (1 << 0), ik_dest_unreach = (1 << 1), ik_ip_conflict = (1 << 2),
    ik_dest_unreach6 = (1 << 4), ik_wol = (1 << 7), ik_net_all = 0x97,
    ik_sock_0 = (1 << 8), ik_sock_1 = (1 << 9), ik_sock_2 = (1 << 10), ik_sock_3 = (1 << 11),
    ik_sock_4 = (1 << 12), ik_sock_5 = (1 << 13), ik_sock_6 = (1 << 14), ik_sock_7 = (1 << 15),
    ik_sock_all = (0xFF << 8),
    ik_sockl_tout = (1 << 16), ik_sockl_arp4 = (1 << 17), ik_sockl_ping4 = (1 << 18),
    ik_sockl_arp6 = (1 << 19), ik_sockl_ping6 = (1 << 20), ik_sockl_ns = (1 << 21),
    ik_sockl_rs = (1 << 22), ik_sockl_ra = (1 << 23), ik_sockl_all = (0xFF << 16),
    ik_int_all = 0x00FFFF97
};

void init_spi();
void reset();
void init();
bool check();

void clear_interrupt(intr_kind intr);
void set_interrupt_mask(intr_kind intr);

std::expected<socket_id, sock_error> open_socket(socket_id sn, protocol proto, sock_flag flag);
std::expected<uint16_t, sock_error> send(socket_id sn, std::span<const uint8_t> buf);
std::expected<uint16_t, sock_error> recv(socket_id sn, std::span<uint8_t> buf);

uint16_t get_socket_recv_buf(socket_id sn);

} // namespace w6300