/*
 fe-irc-channels.c : irssi

    Copyright (C) 1999-2000 Timo Sirainen

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "module.h"
#include <irssi/src/fe-common/irc/module-formats.h>
#include <irssi/src/core/signals.h>
#include <irssi/src/core/levels.h>

#include <irssi/src/irc/core/irc-servers.h>
#include <irssi/src/irc/core/irc-channels.h>
#include <irssi/src/irc/core/channel-rejoin.h>

#include <irssi/src/fe-common/core/printtext.h>
#include <irssi/src/fe-common/core/fe-windows.h>
#include <irssi/src/fe-common/core/window-items.h>

int fe_channel_is_opchannel(IRC_SERVER_REC *server, const char *target)
{
	const char *statusmsg;

	/* Quick check */
	if (server == NULL || server->prefix[(int)(unsigned char)*target] == 0)
		return FALSE;

	statusmsg = g_hash_table_lookup(server->isupport, "statusmsg");
	if (statusmsg == NULL)
		statusmsg = "@";

	return strchr(statusmsg, *target) != NULL;
}

const char *fe_channel_skip_prefix(IRC_SERVER_REC *server, const char *target)
{
	const char *statusmsg;

	/* Quick check */
	if (server == NULL || server->prefix[(int)(unsigned char)*target] == 0)
		return target;

	/* Exit early if target doesn't name a channel */
	if (server_ischannel(SERVER(server), target) == FALSE)
		return target;

	statusmsg = g_hash_table_lookup(server->isupport, "statusmsg");

	/* Hack: for bahamut 1.4 which sends neither STATUSMSG nor
	 * WALLCHOPS in 005 */
	if (statusmsg == NULL)
		statusmsg = "@";

	/* Strip the leading statusmsg prefixes */
	while (strchr(statusmsg, *target) != NULL) {
		target++;
	}

	return target;
}

/* Get time elapsed since an event */
char *time_ago(time_t seconds)
{
	static char ret[128];
	long unsigned years, weeks, days, hours, minutes;

	seconds = time(NULL) - seconds;

	years = seconds / (86400 * 365);
	seconds %= (86400 * 365);
	weeks = seconds / 604800;
	days = (seconds / 86400) % 7;
	hours = (seconds / 3600) % 24;
	minutes = (seconds / 60) % 60;
	seconds %= 60;

	if (years)
		snprintf(ret, sizeof(ret), "%luy %luw %lud", years, weeks, days);
	else if (weeks)
		snprintf(ret, sizeof(ret), "%luw %lud %luh", weeks, days, hours);
	else if (days)
		snprintf(ret, sizeof(ret), "%lud %luh %lum", days, hours, minutes);
	else if (hours)
		snprintf(ret, sizeof(ret), "%luh %lum", hours, minutes);
	else if (minutes)
		snprintf(ret, sizeof(ret), "%lum %lus", minutes, (long unsigned) seconds);
	else
		snprintf(ret, sizeof(ret), "%lus", (long unsigned) seconds);

	return ret;
}

static void sig_channel_rejoin(SERVER_REC *server, REJOIN_REC *rec)
{
	g_return_if_fail(rec != NULL);

	printformat(server, NULL, MSGLEVEL_CLIENTNOTICE,
		    IRCTXT_CHANNEL_REJOIN, rec->channel);
}

static void sig_event_forward(SERVER_REC *server, const char *data,
			      const char *nick)
{
	IRC_CHANNEL_REC *channel;
	char *params, *from, *to;

	params = event_get_params(data, 3, NULL, &from, &to);
	if (from != NULL && to != NULL && server_ischannel(server, from) && server_ischannel(server, to)) {
		channel = irc_channel_find(server, from);
		if (channel != NULL && irc_channel_find(server, to) == NULL) {
			window_bind_add(window_item_window(channel),
					server->tag, to);
		}
	}
	g_free(params);
}

void fe_irc_channels_init(void)
{
	signal_add("channel rejoin new", (SIGNAL_FUNC) sig_channel_rejoin);
	signal_add_first("event 470", (SIGNAL_FUNC) sig_event_forward);
}

void fe_irc_channels_deinit(void)
{
	signal_remove("channel rejoin new", (SIGNAL_FUNC) sig_channel_rejoin);
	signal_remove("event 470", (SIGNAL_FUNC) sig_event_forward);
}