#include <stdlib.h>

#include <string.h>

#include "../testing/misc_tools.h"

#include "../toxcore/network.h"

#include "check_compat.h"

#ifndef USE_IPV6

#define USE_IPV6 1

#endif

static void test_addr_resolv_localhost(void)

{

#ifdef __CYGWIN__

    /* force initialization of network stack

     * normally this should happen automatically

     * cygwin doesn't do it for every network related function though

     * e.g. not for getaddrinfo... */

    net_socket(0, 0, 0);

    errno = 0;

#endif

    const Network *ns = os_network();

    ck_assert(ns != nullptr);

    const char localhost[] = "localhost";

    IP ip;

    ip_init(&ip, 0); // ipv6enabled = 0

    bool res = addr_resolve_or_parse_ip(ns, localhost, &ip, nullptr);

    int error = net_error();

    char *strerror = net_new_strerror(error);

    ck_assert_msg(res, "Resolver failed: %d, %s", error, strerror);

    net_kill_strerror(strerror);

    Ip_Ntoa ip_str;

    ck_assert_msg(net_family_is_ipv4(ip.family), "Expected family TOX_AF_INET, got %u.", ip.family.value);

    const uint32_t loopback = get_ip4_loopback().uint32;

    ck_assert_msg(ip.ip.v4.uint32 == loopback, "Expected 127.0.0.1, got %s.",

                  net_ip_ntoa(&ip, &ip_str));

    ip_init(&ip, 1); // ipv6enabled = 1

    res = addr_resolve_or_parse_ip(ns, localhost, &ip, nullptr);

#if USE_IPV6

    int localhost_split = 0;

    if (!net_family_is_ipv6(ip.family)) {

        res = addr_resolve_or_parse_ip(ns, "ip6-localhost", &ip, nullptr);

        localhost_split = 1;

    }

    error = net_error();

    strerror = net_new_strerror(error);

    ck_assert_msg(res, "Resolver failed: %d, %s", error, strerror);

    net_kill_strerror(strerror);

    ck_assert_msg(net_family_is_ipv6(ip.family), "Expected family TOX_AF_INET6 (%d), got %u.", TOX_AF_INET6,

                  ip.family.value);

    IP6 ip6_loopback = get_ip6_loopback();

    ck_assert_msg(!memcmp(&ip.ip.v6, &ip6_loopback, sizeof(IP6)), "Expected ::1, got %s.",

                  net_ip_ntoa(&ip, &ip_str));

    if (localhost_split) {

        printf("Localhost seems to be split in two.\n");

        return;

    }

#endif

    ip_init(&ip, 1); // ipv6enabled = 1

    ip.family = net_family_unspec();

    IP extra;

    ip_reset(&extra);

    res = addr_resolve_or_parse_ip(ns, localhost, &ip, &extra);

    error = net_error();

    strerror = net_new_strerror(error);

    ck_assert_msg(res, "Resolver failed: %d, %s", error, strerror);

    net_kill_strerror(strerror);

#if USE_IPV6

    ck_assert_msg(net_family_is_ipv6(ip.family), "Expected family TOX_AF_INET6 (%d), got %u.", TOX_AF_INET6,

                  ip.family.value);

    ck_assert_msg(!memcmp(&ip.ip.v6, &ip6_loopback, sizeof(IP6)), "Expected ::1, got %s.",

                  net_ip_ntoa(&ip, &ip_str));

    ck_assert_msg(net_family_is_ipv4(extra.family), "Expected family TOX_AF_INET (%d), got %u.", TOX_AF_INET,

                  extra.family.value);

    ck_assert_msg(extra.ip.v4.uint32 == loopback, "Expected 127.0.0.1, got %s.",

                  net_ip_ntoa(&ip, &ip_str));

#elif 0

    // TODO(iphydf): Fix this to work on IPv6-supporting systems.

    ck_assert_msg(net_family_is_ipv4(ip.family), "Expected family TOX_AF_INET (%d), got %u.", TOX_AF_INET, ip.family.value);

    ck_assert_msg(ip.ip.v4.uint32 == loopback, "Expected 127.0.0.1, got %s.",

                  net_ip_ntoa(&ip, &ip_str));

#endif

}

static void test_ip_equal(void)

{

    int res;

    IP ip1, ip2;

    ip_reset(&ip1);

    ip_reset(&ip2);

    res = ip_equal(nullptr, nullptr);

    ck_assert_msg(res == 0, "ip_equal(NULL, NULL): expected result 0, got %d.", res);

    res = ip_equal(&ip1, nullptr);

    ck_assert_msg(res == 0, "ip_equal(PTR, NULL): expected result 0, got %d.", res);

    res = ip_equal(nullptr, &ip1);

    ck_assert_msg(res == 0, "ip_equal(NULL, PTR): expected result 0, got %d.", res);

    ip1.family = net_family_ipv4();

    ip1.ip.v4.uint32 = net_htonl(0x7F000001);

    res = ip_equal(&ip1, &ip2);

    ck_assert_msg(res == 0, "ip_equal( {TOX_AF_INET, 127.0.0.1}, {TOX_AF_UNSPEC, 0} ): "

                  "expected result 0, got %d.", res);

    ip2.family = net_family_ipv4();

    ip2.ip.v4.uint32 = net_htonl(0x7F000001);

    res = ip_equal(&ip1, &ip2);

    ck_assert_msg(res != 0, "ip_equal( {TOX_AF_INET, 127.0.0.1}, {TOX_AF_INET, 127.0.0.1} ): "

                  "expected result != 0, got 0.");

    ip2.ip.v4.uint32 = net_htonl(0x7F000002);

    res = ip_equal(&ip1, &ip2);

    ck_assert_msg(res == 0, "ip_equal( {TOX_AF_INET, 127.0.0.1}, {TOX_AF_INET, 127.0.0.2} ): "

                  "expected result 0, got %d.", res);

    ip2.family = net_family_ipv6();

    ip2.ip.v6.uint32[0] = 0;

    ip2.ip.v6.uint32[1] = 0;

    ip2.ip.v6.uint32[2] = net_htonl(0xFFFF);

    ip2.ip.v6.uint32[3] = net_htonl(0x7F000001);

    ck_assert_msg(ipv6_ipv4_in_v6(&ip2.ip.v6) != 0,

                  "ipv6_ipv4_in_v6(::ffff:127.0.0.1): expected != 0, got 0.");

    res = ip_equal(&ip1, &ip2);

    ck_assert_msg(res != 0, "ip_equal( {TOX_AF_INET, 127.0.0.1}, {TOX_AF_INET6, ::ffff:127.0.0.1} ): "

                  "expected result != 0, got 0.");

    IP6 ip6_loopback = get_ip6_loopback();

    memcpy(&ip2.ip.v6, &ip6_loopback, sizeof(IP6));

    res = ip_equal(&ip1, &ip2);

    ck_assert_msg(res == 0, "ip_equal( {TOX_AF_INET, 127.0.0.1}, {TOX_AF_INET6, ::1} ): expected result 0, got %d.", res);

    memcpy(&ip1, &ip2, sizeof(IP));

    res = ip_equal(&ip1, &ip2);

    ck_assert_msg(res != 0, "ip_equal( {TOX_AF_INET6, ::1}, {TOX_AF_INET6, ::1} ): expected result != 0, got 0.");

    ip2.ip.v6.uint8[15]++;

    res = ip_equal(&ip1, &ip2);

    ck_assert_msg(res == 0, "ip_equal( {TOX_AF_INET6, ::1}, {TOX_AF_INET6, ::2} ): expected result 0, got %d.", res);

}

int main(void)

{

    setvbuf(stdout, nullptr, _IONBF, 0);

    test_addr_resolv_localhost();

    test_ip_equal();

    return 0;

}