#include "icmp_error.h"
#include "interval.h"
#include "setting.h"
#include "statistics.h"
#include <arpa/inet.h>
#include <bits/types/struct_timeval.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h>
#include <stdarg.h>
#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>

void print_err(const char *format, ...)
{
    va_list args;

    dprintf(2, "ft_ping: ");
    va_start(args, format);
    vdprintf(2, format, args);
    va_end(args);
    write(2, "\n", 1);
}

void print_header(const struct setting *settings)
{
    printf("PING %s (%s): %zu data bytes",
        settings->dest.hostname,
        settings->dest.ipstr,
        settings->payload_size
    );
    if (settings->verbose)
    {
        unsigned short pid = getpid();
        unsigned short s_pid = htons(getpid());
        printf(", id 0x%02x%02x = %d", s_pid & 0xFF,  (s_pid>>8) & 0xFF, pid);
    }
    printf("\n");
}

void print_statistics(struct statistics const *stats, struct setting const *settings)
{
    printf("--- %s ping statistics ---\n", settings->dest.hostname);
    printf("%zu packets transmitted, %zu packets received, %.3f%% packet loss\n",
        stats->packets_sent,
        stats->packets_received,
        ((double) stats->packets_sent - stats->packets_received) * 100 / stats->packets_sent
    );
}

static const char *get_message_description(const uint8_t type, const uint8_t code)
{
    switch(type)
    {
        case 0:
            return "icmp_seq=%d ttl=%d time=%.3f ms";
        case ICMP_DEST_UNREACH:
            return (net_icmp_unreach_messages[code]);
        case ICMP_REDIRECT:
            return (net_icmp_redirect_messages[code]);
        case ICMP_TIME_EXCEEDED:
            return (net_icmp_time_messages[code]);
    }
    return (NULL);
}

void print_recv(const struct setting *settings, const char *packet, const struct timeval *start, const struct timeval *stop, struct sockaddr_in const *sender)
{
    const struct iphdr *ip_hdr = (const struct iphdr *) packet;
    const struct icmphdr *icmp_hdr = (const struct icmphdr *) packet + sizeof(struct iphdr);

    char *ipstr = inet_ntoa(sender->sin_addr);
    printf("%ld bozo", ntohs(ip_hdr->tot_len) - sizeof(struct iphdr));
    printf(" bytes from %s: ", ipstr);
    printf(get_message_description(icmp_hdr->type, icmp_hdr->code),
        htons(icmp_hdr->un.echo.sequence),
        settings->ttl,
        get_interval(start, stop)
    );
    printf("\n");
}