#pragma once

#include <assert.h>
#include <stdint.h>
#include <time.h>
#include <netinet/in.h>

#include "timer.h"
#include "link.h"

#define EVENT_TYPE__INVALID     0x00000000
#define EVENT_TYPE__TIME_START  0x12858517
#define EVENT_TYPE__TIME_RESUME 0x56100f0f
#define EVENT_TYPE__TIME_STOP   0xdf75d3f8
#define EVENT_TYPE__AVERAGE_RTT 0xc7065931
#define EVENT_TYPE__PING        0x0ba0d4c2
#define EVENT_TYPE__PONG        0x49a87c9d
#define EVENT_TYPE__ACK         0xfde7959f

static_assert((sizeof (struct timespec)) == 8 + 8);

struct event {
  uint32_t type;
  uint32_t sequence;
};

struct packet_stopwatch {
  struct event event;
  struct stopwatch_time stopwatch_time;
};

static_assert((sizeof (struct packet_stopwatch)) ==
	      (sizeof (struct event)) + (sizeof (struct stopwatch_time)));

struct packet_start {
  struct event event;
};

static_assert((sizeof (struct packet_start)) == (sizeof (struct event)));

struct packet_resume {
  struct event event;
  struct timespec offset;
};

static_assert((sizeof (struct packet_resume)) ==
	      (sizeof (struct event)) + (sizeof (struct timespec)));

struct packet_ack {
  struct event event;
};

static_assert((sizeof (struct packet_ack)) == (sizeof (struct event)));

struct packet_average_rtt {
  struct event event;
  struct timespec offset;
};

static_assert((sizeof (struct packet_average_rtt)) == (sizeof (struct event)) + (sizeof (struct timespec)));

struct packet_ping_pong {
  struct event event;
  struct timespec time;
};

int packet_send_ping(int sockfd,
                     struct sockaddr_in6 * dest_addr);
int packet_send_pong(int sockfd,
                     struct sockaddr_in6 * dest_addr,
                     struct timespec * time);
int packet_send_average_rtt(int sockfd,
                            struct sockaddr_in6 * dest_addr,
                            struct timespec * offset);

int packet_send_start_event(int sockfd,
                            struct sockaddr_in6 * dest_addr,
                            struct link_state * link_state);
int packet_send_resume_event(int sockfd,
			     struct sockaddr_in6 * dest_addr,
			     struct timer_state * timer_state,
			     struct link_state * link_state);
int packet_send_stopwatch_event(int sockfd,
                                struct sockaddr_in6 * dest_addr,
                                struct timer_state * timer_state,
                                struct link_state * link_state);
int packet_send_ack(int sockfd,
		    struct sockaddr_in6 * dest_addr,
		    uint32_t sequence);