#include "private-libwebsockets.h"
#include "freertos/timers.h"

/*
 * included from libwebsockets.c for unix builds
 */

unsigned long long time_in_microseconds(void)
{
	struct timeval tv;
	gettimeofday(&tv, NULL);
	return ((unsigned long long)tv.tv_sec * 1000000LL) + tv.tv_usec;
}

LWS_VISIBLE int
lws_get_random(struct lws_context *context, void *buf, int len)
{
	// !!!
	return 0;
}

LWS_VISIBLE int
lws_send_pipe_choked(struct lws *wsi)
{
	fd_set writefds;
	struct timeval tv = { 0, 0 };

	/* treat the fact we got a truncated send pending as if we're choked */
	if (wsi->trunc_len)
		return 1;

	FD_ZERO(&writefds);
	FD_SET(wsi->sock, &writefds);

	if (select(wsi->sock + 1, NULL, &writefds, NULL, &tv) < 1)
		return 1;

	return 0;
}

LWS_VISIBLE int
lws_poll_listen_fd(struct lws_pollfd *fd)
{
	fd_set readfds;
	struct timeval tv = { 0, 0 };

	FD_ZERO(&readfds);
	FD_SET(fd->fd, &readfds);

	return select(fd->fd + 1, &readfds, NULL, NULL, &tv);
}

LWS_VISIBLE void
lws_cancel_service_pt(struct lws *wsi)
{
}

LWS_VISIBLE void
lws_cancel_service(struct lws_context *context)
{
}

LWS_VISIBLE void lwsl_emit_syslog(int level, const char *line)
{
	printf("%d: %s", level, line);
}

LWS_VISIBLE LWS_EXTERN int
_lws_plat_service_tsi(struct lws_context *context, int timeout_ms, int tsi)
{
	struct lws_context_per_thread *pt;
	int n = -1, m, c;

	/* stay dead once we are dead */

	if (!context || !context->vhost_list)
		return 1;

	pt = &context->pt[tsi];

	if (timeout_ms < 0)
		goto faked_service;

	if (!context->service_tid_detected) {
		struct lws _lws;

		memset(&_lws, 0, sizeof(_lws));
		_lws.context = context;

		context->service_tid_detected =
			context->vhost_list->protocols[0].callback(
			&_lws, LWS_CALLBACK_GET_THREAD_ID, NULL, NULL, 0);
	}
	context->service_tid = context->service_tid_detected;

	/*
	 * is there anybody with pending stuff that needs service forcing?
	 */
	if (!lws_service_adjust_timeout(context, 1, tsi)) {
		/* -1 timeout means just do forced service */
		_lws_plat_service_tsi(context, -1, pt->tid);
		/* still somebody left who wants forced service? */
		if (!lws_service_adjust_timeout(context, 1, pt->tid))
			/* yes... come back again quickly */
			timeout_ms = 0;
	}

//	n = poll(pt->fds, pt->fds_count, timeout_ms);
	{
		fd_set readfds, writefds, errfds;
		struct timeval tv = { timeout_ms / 1000,
				      (timeout_ms % 1000) * 1000 };
		int max_fd = 0;
		FD_ZERO(&readfds);
		FD_ZERO(&writefds);
		FD_ZERO(&errfds);

		for (n = 0; n < pt->fds_count; n++) {
			pt->fds[n].revents = 0;
			if (pt->fds[n].fd >= max_fd)
				max_fd = pt->fds[n].fd;
			if (pt->fds[n].events & LWS_POLLIN)
				FD_SET(pt->fds[n].fd, &readfds);
			if (pt->fds[n].events & LWS_POLLOUT)
				FD_SET(pt->fds[n].fd, &writefds);
			FD_SET(pt->fds[n].fd, &errfds);
		}

		n = select(max_fd + 1, &readfds, &writefds, &errfds, &tv);
		for (n = 0; n < pt->fds_count; n++) {
			if (FD_ISSET(pt->fds[n].fd, &readfds))
				pt->fds[n].revents |= LWS_POLLIN;
			if (FD_ISSET(pt->fds[n].fd, &writefds))
				pt->fds[n].revents |= LWS_POLLOUT;
			if (FD_ISSET(pt->fds[n].fd, &errfds))
				pt->fds[n].revents |= LWS_POLLHUP;
		}
	}


#ifdef LWS_OPENSSL_SUPPORT
	if (!pt->rx_draining_ext_list &&
	    !lws_ssl_anybody_has_buffered_read_tsi(context, tsi) && !n) {
#else
	if (!pt->rx_draining_ext_list && !n) /* poll timeout */ {
#endif
		lws_service_fd_tsi(context, NULL, tsi);
		return 0;
	}

faked_service:
	m = lws_service_flag_pending(context, tsi);
	if (m)
		c = -1; /* unknown limit */
	else
		if (n < 0) {
			if (LWS_ERRNO != LWS_EINTR)
				return -1;
			return 0;
		} else
			c = n;

	/* any socket with events to service? */
	for (n = 0; n < pt->fds_count && c; n++) {
		if (!pt->fds[n].revents)
			continue;

		c--;

		m = lws_service_fd_tsi(context, &pt->fds[n], tsi);
		if (m < 0)
			return -1;
		/* if something closed, retry this slot */
		if (m)
			n--;
	}

	return 0;
}

LWS_VISIBLE int
lws_plat_check_connection_error(struct lws *wsi)
{
	return 0;
}

LWS_VISIBLE int
lws_plat_service(struct lws_context *context, int timeout_ms)
{
	return _lws_plat_service_tsi(context, timeout_ms, 0);
}

LWS_VISIBLE int
lws_plat_set_socket_options(struct lws_vhost *vhost, int fd)
{
	int optval = 1;
	socklen_t optlen = sizeof(optval);

#if defined(__APPLE__) || \
    defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
    defined(__NetBSD__) || \
    defined(__OpenBSD__)
	struct protoent *tcp_proto;
#endif

	if (vhost->ka_time) {
		/* enable keepalive on this socket */
		optval = 1;
		if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE,
			       (const void *)&optval, optlen) < 0)
			return 1;

#if defined(__APPLE__) || \
    defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
    defined(__NetBSD__) || \
        defined(__CYGWIN__) || defined(__OpenBSD__) || defined (__sun)

		/*
		 * didn't find a way to set these per-socket, need to
		 * tune kernel systemwide values
		 */
#else
		/* set the keepalive conditions we want on it too */
		optval = vhost->ka_time;
		if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE,
			       (const void *)&optval, optlen) < 0)
			return 1;

		optval = vhost->ka_interval;
		if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL,
			       (const void *)&optval, optlen) < 0)
			return 1;

		optval = vhost->ka_probes;
		if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT,
			       (const void *)&optval, optlen) < 0)
			return 1;
#endif
	}
#if 0
	/* Disable Nagle */
	optval = 1;
//	if (setsockopt(fd, SOL_TCP, TCP_NODELAY, (const void *)&optval, optlen) < 0)
//		return 1;
	tcp_proto = getprotobyname("TCP");
	if (setsockopt(fd, tcp_proto->p_proto, TCP_NODELAY, &optval, optlen) < 0)
		return 1;
#endif
	/* We are nonblocking... */
	if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
		return 1;

	return 0;
}

LWS_VISIBLE void
lws_plat_drop_app_privileges(struct lws_context_creation_info *info)
{
}

LWS_VISIBLE int
lws_plat_context_early_init(void)
{
	//signal(SIGPIPE, SIG_IGN);

//	signal(SIGABRT, sigabrt_handler);

	return 0;
}

LWS_VISIBLE void
lws_plat_context_early_destroy(struct lws_context *context)
{
}

LWS_VISIBLE void
lws_plat_context_late_destroy(struct lws_context *context)
{
#ifdef LWS_WITH_PLUGINS
	if (context->plugin_list)
		lws_plat_plugins_destroy(context);
#endif

	if (context->lws_lookup)
		lws_free(context->lws_lookup);
}

/* cast a struct sockaddr_in6 * into addr for ipv6 */

LWS_VISIBLE int
lws_interface_to_sa(int ipv6, const char *ifname, struct sockaddr_in *addr,
		    size_t addrlen)
{
#if 0
	int rc = -1;

	struct ifaddrs *ifr;
	struct ifaddrs *ifc;
#ifdef LWS_USE_IPV6
	struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
#endif

	getifaddrs(&ifr);
	for (ifc = ifr; ifc != NULL && rc; ifc = ifc->ifa_next) {
		if (!ifc->ifa_addr)
			continue;

		lwsl_info(" interface %s vs %s\n", ifc->ifa_name, ifname);

		if (strcmp(ifc->ifa_name, ifname))
			continue;

		switch (ifc->ifa_addr->sa_family) {
		case AF_INET:
#ifdef LWS_USE_IPV6
			if (ipv6) {
				/* map IPv4 to IPv6 */
				bzero((char *)&addr6->sin6_addr,
						sizeof(struct in6_addr));
				addr6->sin6_addr.s6_addr[10] = 0xff;
				addr6->sin6_addr.s6_addr[11] = 0xff;
				memcpy(&addr6->sin6_addr.s6_addr[12],
					&((struct sockaddr_in *)ifc->ifa_addr)->sin_addr,
							sizeof(struct in_addr));
			} else
#endif
				memcpy(addr,
					(struct sockaddr_in *)ifc->ifa_addr,
						    sizeof(struct sockaddr_in));
			break;
#ifdef LWS_USE_IPV6
		case AF_INET6:
			memcpy(&addr6->sin6_addr,
			  &((struct sockaddr_in6 *)ifc->ifa_addr)->sin6_addr,
						       sizeof(struct in6_addr));
			break;
#endif
		default:
			continue;
		}
		rc = 0;
	}

	freeifaddrs(ifr);

	if (rc == -1) {
		/* check if bind to IP address */
#ifdef LWS_USE_IPV6
		if (inet_pton(AF_INET6, ifname, &addr6->sin6_addr) == 1)
			rc = 0;
		else
#endif
		if (inet_pton(AF_INET, ifname, &addr->sin_addr) == 1)
			rc = 0;
	}

	return rc;
#endif

	return -1;
}

LWS_VISIBLE void
lws_plat_insert_socket_into_fds(struct lws_context *context, struct lws *wsi)
{
	struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];

	pt->fds[pt->fds_count++].revents = 0;
}

LWS_VISIBLE void
lws_plat_delete_socket_from_fds(struct lws_context *context,
						struct lws *wsi, int m)
{
	struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];

	pt->fds_count--;
}

LWS_VISIBLE void
lws_plat_service_periodic(struct lws_context *context)
{
}

LWS_VISIBLE int
lws_plat_change_pollfd(struct lws_context *context,
		      struct lws *wsi, struct lws_pollfd *pfd)
{
	return 0;
}

LWS_VISIBLE const char *
lws_plat_inet_ntop(int af, const void *src, char *dst, int cnt)
{
	return inet_ntop(af, src, dst, cnt);
}

static lws_filefd_type
_lws_plat_file_open(struct lws *wsi, const char *filename,
		    unsigned long *filelen, int *flags)
{
	struct stat stat_buf;

	int ret = open(filename, *flags, 0664);

	if (ret < 0)
		return LWS_INVALID_FILE;

	if (fstat(ret, &stat_buf) < 0) {
		close(ret);
		return LWS_INVALID_FILE;
	}
	*filelen = stat_buf.st_size;
	return (lws_filefd_type)ret;
}

static int
_lws_plat_file_close(struct lws *wsi, lws_filefd_type fd)
{
	return close((int)fd);
}

unsigned long
_lws_plat_file_seek_cur(struct lws *wsi, lws_filefd_type fd, long offset)
{
	return lseek((int)fd, offset, SEEK_CUR);
}

static int
_lws_plat_file_read(struct lws *wsi, lws_filefd_type fd, unsigned long *amount,
		    unsigned char *buf, unsigned long len)
{
	long n;

	n = read((int)fd, buf, len);
	if (n == -1) {
		*amount = 0;
		return -1;
	}

	*amount = n;

	return 0;
}

static int
_lws_plat_file_write(struct lws *wsi, lws_filefd_type fd, unsigned long *amount,
		     unsigned char *buf, unsigned long len)
{
	long n;

	n = write((int)fd, buf, len);
	if (n == -1) {
		*amount = 0;
		return -1;
	}

	*amount = n;

	return 0;
}


LWS_VISIBLE int
lws_plat_init(struct lws_context *context,
	      struct lws_context_creation_info *info)
{
	/* master context has the global fd lookup array */
	context->lws_lookup = lws_zalloc(sizeof(struct lws *) *
					 context->max_fds);
	if (context->lws_lookup == NULL) {
		lwsl_err("OOM on lws_lookup array for %d connections\n",
			 context->max_fds);
		return 1;
	}

	lwsl_notice(" mem: platform fd map: %5lu bytes\n",
		    (unsigned long)(sizeof(struct lws *) * context->max_fds));

	context->fops.LWS_FOP_OPEN	= _lws_plat_file_open;
	context->fops.LWS_FOP_CLOSE	= _lws_plat_file_close;
	context->fops.LWS_FOP_SEEK_CUR	= _lws_plat_file_seek_cur;
	context->fops.LWS_FOP_READ	= _lws_plat_file_read;
	context->fops.LWS_FOP_WRITE	= _lws_plat_file_write;

#ifdef LWS_WITH_PLUGINS
	if (info->plugin_dirs)
		lws_plat_plugins_init(context, info->plugin_dirs);
#endif

	return 0;
}


LWS_VISIBLE void esp32_uvtimer_cb(TimerHandle_t t)
{
	struct timer_mapping *p = pvTimerGetTimerID(t);

	p->cb(p->t);
}