#include <netinet/in.h>
#include <stdio.h>
#include <string.h>

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

int packet_send_ping(int sockfd,
                     struct sockaddr_in6 * dest_addr)
{
  struct packet_ping_pong pkt;
  pkt.event.type = EVENT_TYPE__PING;
  pkt.event.sequence = 0;
  {
    int ret = clock_gettime(CLOCK_MONOTONIC_RAW, &pkt.time);
    assert(ret != -1);
  }

  int ret = sendto(sockfd,
                   &pkt, (sizeof (pkt)),
		   0,
		   (struct sockaddr *)dest_addr,
		   (sizeof (struct sockaddr_in6)));

  if (ret == -1) {
    perror("packet_send_ping sendto");
    return -1;
  }

  return 0;
}

int packet_send_pong(int sockfd,
                     struct sockaddr_in6 * dest_addr,
                     struct timespec * time)
{
  struct packet_ping_pong pkt;
  pkt.event.type = EVENT_TYPE__PONG;
  pkt.event.sequence = 0;
  memcpy(&pkt.time, time, (sizeof (struct timespec)));

  int ret = sendto(sockfd,
                   &pkt, (sizeof (pkt)),
		   0,
		   (struct sockaddr *)dest_addr,
		   (sizeof (struct sockaddr_in6)));

  if (ret == -1) {
    perror("packet_send_pong sendto");
    return -1;
  }

  return 0;
}

int packet_send_average_rtt(int sockfd,
                            struct sockaddr_in6 * dest_addr,
                            struct timespec * time)
{
  struct packet_ping_pong pkt;
  pkt.event.type = EVENT_TYPE__AVERAGE_RTT;
  pkt.event.sequence = 0;
  memcpy(&pkt.time, time, (sizeof (struct timespec)));

  int ret = sendto(sockfd,
                   &pkt, (sizeof (pkt)),
		   0,
		   (struct sockaddr *)dest_addr,
		   (sizeof (struct sockaddr_in6)));

  if (ret == -1) {
    perror("packet_send_average_rtt sendto");
    return -1;
  }

  return 0;
}

int packet_send_start_event(int sockfd,
                            struct sockaddr_in6 * dest_addr,
                            struct timer_state * timer_state,
                            struct link_state * link_state)
{
  struct packet_start pkt;
  pkt.event.type = EVENT_TYPE__TIME_START;
  pkt.event.sequence = link_state->send_sequence++;

  int ret = sendto(sockfd,
		   &pkt, (sizeof (pkt)),
		   0,
		   (struct sockaddr *)dest_addr,
		   (sizeof (struct sockaddr_in6)));
  if (ret == -1) {
    perror("packet_send_start_event sendto");
    return -1;
  }

  return 0;
}

int packet_send_stopwatch_event(int sockfd,
                                struct sockaddr_in6 * dest_addr,
                                struct timer_state * timer_state,
                                struct link_state * link_state)
{
  struct packet_stopwatch pkt;
  pkt.event.type = EVENT_TYPE__TIME_STOP;
  pkt.event.sequence = link_state->send_sequence++;
  memcpy(&pkt.stopwatch_time, &timer_state->time, (sizeof (struct stopwatch_time)));

  int ret = sendto(sockfd,
		   &pkt, (sizeof (pkt)),
		   0,
		   (struct sockaddr *)dest_addr,
		   (sizeof (struct sockaddr_in6)));
  if (ret == -1) {
    perror("packet_send_stopwatch_event sendto");
    return -1;
  }

  return 0;
}