/*
 * Copyright (c) 2026 Nakidai Perumenei <nakidai at disroot dot org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "ircd.h"

#include <errno.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>

#include <err.h>


const char *
getnick(const struct Peer *peer)
{
	return *peer->nick ? peer->nick : "*";
}

enum PeerMode
user_mode(char m)
{
	switch (m)
	{
	case 'a': return AWAY;
	case 'i': return INVISIBLE;
	case 'w': return WALLOPS;
	case 'r': return RESTRICTED;
	case 'o': return OPER;
	case 'O': return LOCALOPER;
	case 's': return SNOTICE;
	default: return 0;
	}
}

void
user_reg(struct Peer *peer, const char *nick, const char *user, const char *real, const char *mode)
{
	unsigned long m;
	const char *p;

	if (nick)
		strlcpy(peer->nick, nick, sizeof(peer->nick));
	if (user)
		strlcpy(peer->user, user, sizeof(peer->user));
	if (real)
		strlcpy(peer->real, real, sizeof(peer->real));
	if (mode)
	{
		errno = 0;
		m = strtoul(mode, &p, 10);
		if (errno || *p)
			goto skip;

		if (m & 8)
			peer->modes |= INVISIBLE;
		if (m & 4)
			peer->modes |= WALLOPS;
	}
skip:
	if (*peer->nick && *peer->user && *peer->real)
	{
		peer->type = CLIENT;
		reply(peer, 1);
	}
}

void
user_remove(size_t pid)
{
	size_t i, j;

	for (i = 0; i < peers[peers_c-1].channels_c; ++i)
	{
		for (j = 0; j < peers[peers_c-1].channels[i]->users_c; ++j)
			if (peers[peers_c-1].channels[i]->users[j]->fd == peers[peers_c-1].fd)
				break;
		if (j == peers[peers_c-1].channels[i]->users_c)
		{
			warnx(
				"user_unlink(): %s@%s doesn't belong to %s, "
				"though they believe in the opposite",
				getnick(&peers[peers_c-1]),
				peers[peers_c-1].host,
				peers[peers_c-1].channels[i]->name
			);
			continue;
		}

		peers[peers_c-1].channels[i]->users[j] = &peers[pid];
	}

	peers[pid] = peers[--peers_c];
}