/*
 * Copyright (C) 2003-2010 Sebastien Helleu <flashcode@flashtux.org>
 *
 * This file is part of WeeChat, the extensible chat client.
 *
 * WeeChat 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 3 of the License, or
 * (at your option) any later version.
 *
 * WeeChat 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 WeeChat.  If not, see <http://www.gnu.org/licenses/>.
 */

/*
 * irc-buffer.c: buffer functions for IRC plugin
 */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>

#include "../weechat-plugin.h"
#include "irc.h"
#include "irc-buffer.h"
#include "irc-channel.h"
#include "irc-command.h"
#include "irc-config.h"
#include "irc-raw.h"
#include "irc-server.h"


/*
 * irc_buffer_get_server_and_channel: get IRC server and channel pointers with
 *                                    a buffer pointer
 *                                    (buffer may be a server or a channel)
 */

void
irc_buffer_get_server_and_channel (struct t_gui_buffer *buffer,
                                   struct t_irc_server **server,
                                   struct t_irc_channel **channel)
{
    struct t_irc_server *ptr_server;
    struct t_irc_channel *ptr_channel;
    
    if (server)
        *server = NULL;
    if (channel)
        *channel = NULL;
    
    if (!buffer)
        return;
    
    /* look for a server or channel using this buffer */
    for (ptr_server = irc_servers; ptr_server;
         ptr_server = ptr_server->next_server)
    {
        if (ptr_server->buffer == buffer)
        {
            if (server)
                *server = ptr_server;
            return;
        }
        
        for (ptr_channel = ptr_server->channels; ptr_channel;
             ptr_channel = ptr_channel->next_channel)
        {
            if (ptr_channel->buffer == buffer)
            {
                if (server)
                    *server = ptr_server;
                if (channel)
                    *channel = ptr_channel;
                return;
            }
        }
    }
    
    /* no server or channel found */
}

/*
 * irc_buffer_build_name: build buffer name with a server and a channel
 */

char *
irc_buffer_build_name (const char *server, const char *channel)
{
    static char buffer[128];
    
    buffer[0] = '\0';
    
    if (!server && !channel)
        return buffer;
    
    if (server && channel)
        snprintf (buffer, sizeof (buffer), "%s.%s", server, channel);
    else
        snprintf (buffer, sizeof (buffer), "%s",
                  (server) ? server : channel);
    
    return buffer;
}

/*
 * irc_buffer_close_cb: callback called when a buffer is closed
 */

int
irc_buffer_close_cb (void *data, struct t_gui_buffer *buffer)
{
    struct t_irc_channel *next_channel;
    
    IRC_BUFFER_GET_SERVER_CHANNEL(buffer);
    
    /* make C compiler happy */
    (void) data;
    
    if (buffer == irc_raw_buffer)
    {
        irc_raw_buffer = NULL;
    }
    else
    {
        if (ptr_channel)
        {
            /* send PART for channel if its buffer is closed */
            if ((ptr_channel->type == IRC_CHANNEL_TYPE_CHANNEL)
                && (ptr_channel->nicks))
            {
                irc_command_part_channel (ptr_server, ptr_channel->name, NULL);
            }
            irc_channel_free (ptr_server, ptr_channel);
        }
        else
        {
            if (ptr_server)
            {
                /* send PART on all channels for server, then disconnect from server */
                ptr_channel = ptr_server->channels;
                while (ptr_channel)
                {
                    next_channel = ptr_channel->next_channel;
                    weechat_buffer_close (ptr_channel->buffer);
                    ptr_channel = next_channel;
                }
                irc_server_disconnect (ptr_server, 0, 0);
                ptr_server->buffer = NULL;
            }
        }
    }
    
    return WEECHAT_RC_OK;
}

/*
 * irc_buffer_search_first_for_all_servers: search first server buffer that
 *                                          will be used to merge all IRC
 *                                          server buffers
 */

struct t_gui_buffer *
irc_buffer_search_first_for_all_servers ()
{
    struct t_gui_buffer *ptr_buffer;
    struct t_irc_server *ptr_server;
    int number, number_found;
    
    ptr_buffer = NULL;
    number_found = INT_MAX;
    
    for (ptr_server = irc_servers; ptr_server;
         ptr_server = ptr_server->next_server)
    {
        if (ptr_server->buffer)
        {
            number = weechat_buffer_get_integer (ptr_server->buffer, "number");
            if (number < number_found)
            {
                number_found = number;
                ptr_buffer = ptr_server->buffer;
            }
        }
    }
    return ptr_buffer;
}