/*
 * Copyright (C) 2006 Emmanuel Bouthenot <kolter@openics.org>
 * Copyright (C) 2006-2010 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/>.
 */

/*
 * weechat-aspell.c: aspell plugin for WeeChat: use color to show mispelled
 *                   words in input line
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <wctype.h>

#include "../weechat-plugin.h"
#include "weechat-aspell.h"
#include "weechat-aspell-config.h"
#include "weechat-aspell-speller.h"


WEECHAT_PLUGIN_NAME(ASPELL_PLUGIN_NAME);
WEECHAT_PLUGIN_DESCRIPTION("Aspell plugin for WeeChat");
WEECHAT_PLUGIN_AUTHOR("Sebastien Helleu <flashcode@flashtux.org>");
WEECHAT_PLUGIN_VERSION(WEECHAT_VERSION);
WEECHAT_PLUGIN_LICENSE(WEECHAT_LICENSE);

struct t_weechat_plugin *weechat_aspell_plugin = NULL;

char *aspell_last_modifier_string = NULL; /* last str. received by modifier */
char *aspell_last_modifier_result = NULL; /* last str. built by modifier    */

/* aspell supported langs (updated on of 2008-10-17) */
struct t_aspell_code langs_avail[] =
{
    { "af",     "Afrikaans" },
    { "am",     "Amharic" },
    { "ar",     "Arabic" },
    { "az",     "Azerbaijani" },
    { "be",     "Belarusian" },
    { "bg",     "Bulgarian" },
    { "bn",     "Bengali" },
    { "br",     "Breton" },
    { "ca",     "Catalan" },
    { "cs",     "Czech" },
    { "csb",    "Kashubian" },
    { "cy",     "Welsh" },
    { "da",     "Danish" },
    { "de",     "German" },
    { "de-alt", "German - Old Spelling" },
    { "el",     "Greek" },
    { "en",     "English" },
    { "eo",     "Esperanto" },
    { "es",     "Spanish" },
    { "et",     "Estonian" },
    { "fa",     "Persian" },
    { "fi",     "Finnish" },
    { "fo",     "Faroese" },
    { "fr",     "French" },
    { "fy",     "Frisian" },
    { "ga",     "Irish" },
    { "gd",     "Scottish Gaelic" },
    { "gl",     "Galician" },
    { "gu",     "Gujarati" },
    { "gv",     "Manx Gaelic" },
    { "he",     "Hebrew" },
    { "hi",     "Hindi" },
    { "hil",    "Hiligaynon" },
    { "hr",     "Croatian" },
    { "hsb",    "Upper Sorbian" },
    { "hu",     "Hungarian" },
    { "hy",     "Armenian" },
    { "ia",     "Interlingua" },
    { "id",     "Indonesian" },
    { "is",     "Icelandic" },
    { "it",     "Italian" },
    { "ku",     "Kurdi" },
    { "la",     "Latin" },
    { "lt",     "Lithuanian" },
    { "lv",     "Latvian" },
    { "mg",     "Malagasy" },
    { "mi",     "Maori" },
    { "mk",     "Macedonian" },
    { "ml",     "Malayalam" },
    { "mn",     "Mongolian" },
    { "mr",     "Marathi" },
    { "ms",     "Malay" },
    { "mt",     "Maltese" },
    { "nb",     "Norwegian Bokmal" },
    { "nds",    "Low Saxon" },
    { "nl",     "Dutch" },
    { "nn",     "Norwegian Nynorsk" },
    { "ny",     "Chichewa" },
    { "or",     "Oriya" },
    { "pa",     "Punjabi" },
    { "pl",     "Polish" },
    { "pt_BR",  "Brazilian Portuguese" },
    { "pt_PT",  "Portuguese" },
    { "qu",     "Quechua" },
    { "ro",     "Romanian" },
    { "ru",     "Russian" },
    { "rw",     "Kinyarwanda" },
    { "sc",     "Sardinian" },
    { "sk",     "Slovak" },
    { "sl",     "Slovenian" },
    { "sr",     "Serbian" },
    { "sv",     "Swedish" },
    { "sw",     "Swahili" },
    { "ta",     "Tamil" },
    { "te",     "Telugu" },
    { "tet",    "Tetum" },
    { "tk",     "Turkmen" },
    { "tl",     "Tagalog" },
    { "tn",     "Setswana" },
    { "tr",     "Turkish" },
    { "uk",     "Ukrainian" },
    { "uz",     "Uzbek" },
    { "vi",     "Vietnamese" },
    { "wa",     "Walloon" },
    { "yi",     "Yiddish" },
    { "zu",     "Zulu" },
    { NULL,     NULL}
};

struct t_aspell_code countries_avail[] =
{
    { "AT", "Austria" },
    { "BR", "Brazil" },
    { "CA", "Canada" },
    { "CH", "Switzerland" },
    { "DE", "Germany" },
    { "FR", "France" },
    { "GB", "Great Britain" },
    { "PT", "Portugal" },
    { "SK", "Slovakia" },
    { "US", "United States of America" },
    { NULL, NULL}
};


/*
 * weechat_aspell_build_option_name: build option name with a buffer
 */

char *
weechat_aspell_build_option_name (struct t_gui_buffer *buffer)
{
    const char *plugin_name, *name;
    char *option_name;
    int length;
    
    if (!buffer)
        return NULL;
    
    plugin_name = weechat_buffer_get_string (buffer, "plugin");
    name = weechat_buffer_get_string (buffer, "name");
    
    length = strlen (plugin_name) + 1 + strlen (name) + 1;
    option_name = malloc (length);
    if (!option_name)
        return NULL;
    
    snprintf (option_name, length, "%s.%s", plugin_name, name);
    
    return option_name;
}

/*
 * weechat_aspell_get_dict: get dictionary list for a buffer
 *                          we first try with all arguments, then remove one by
 *                          one to find dict (from specific to general dict)
 */

const char *
weechat_aspell_get_dict (struct t_gui_buffer *buffer)
{
    char *name, *option_name, *ptr_end;
    struct t_config_option *ptr_option;
    
    name = weechat_aspell_build_option_name (buffer);
    if (!name)
        return NULL;
    
    option_name = strdup (name);
    if (option_name)
    {
        ptr_end = option_name + strlen (option_name);
        while (ptr_end >= option_name)
        {
            ptr_option = weechat_aspell_config_get_dict (option_name);
            if (ptr_option)
            {
                free (option_name);
                free (name);
                return weechat_config_string (ptr_option);
            }
            ptr_end--;
            while ((ptr_end >= option_name) && (ptr_end[0] != '.'))
            {
                ptr_end--;
            }
            if ((ptr_end >= option_name) && (ptr_end[0] == '.'))
                ptr_end[0] = '\0';
        }
        ptr_option = weechat_aspell_config_get_dict (option_name);
        
        free (option_name);
        free (name);
        
        if (ptr_option)
            return weechat_config_string (ptr_option);
    }
    else
        free (name);
    
    /* nothing found => return default dictionary (if set) */
    if (weechat_config_string (weechat_aspell_config_check_default_dict)
        && weechat_config_string (weechat_aspell_config_check_default_dict)[0])
        return weechat_config_string (weechat_aspell_config_check_default_dict);
    
    /* no default dictionary set */
    return NULL;
}

/*
 * weechat_aspell_set_dict: set a dictionary list for a buffer
 */

void
weechat_aspell_set_dict (struct t_gui_buffer *buffer, const char *value)
{
    char *name;
    
    name = weechat_aspell_build_option_name (buffer);
    if (!name)
        return;
    
    if (weechat_aspell_config_set_dict (name, value) > 0)
    {
        if (value && value[0])
            weechat_printf (NULL, "%s: \"%s\" => %s",
                            ASPELL_PLUGIN_NAME, name, value);
        else
            weechat_printf (NULL, _("%s: \"%s\" removed"),
                            ASPELL_PLUGIN_NAME, name);
    }
    
    free (name);
}

/*
 * weechat_aspell_spellers_already_ok: check if current spellers are already ok
 *                                     return 1 if already ok, 0 if spellers
 *                                     must be free then created again
 */

int
weechat_aspell_spellers_already_ok (const char *dict_list)
{
    char **argv;
    int argc, rc, i;
    struct t_aspell_speller *ptr_speller;
    
    if (!dict_list && !weechat_aspell_spellers)
        return 1;
    
    if (!dict_list || !weechat_aspell_spellers)
        return 0;
    
    rc = 0;
    
    argv = weechat_string_split (dict_list, ",", 0, 0, &argc);
    if (argv)
    {
        ptr_speller = weechat_aspell_spellers;
        for (i = 0; (i < argc) && ptr_speller; i++)
        {
            if (strcmp (ptr_speller->lang, argv[i]) == 0)
            {
                rc = 1;
                break;
            }
            ptr_speller = ptr_speller->next_speller;
        }
        weechat_string_free_split (argv);
    }
    
    return rc;
}

/*
 * weechat_aspell_create_spellers: create spellers for a buffer
 */

void
weechat_aspell_create_spellers (struct t_gui_buffer *buffer)
{
    const char *dict_list;
    char **argv;
    int argc, i;
    
    if (buffer)
    {
        dict_list = weechat_aspell_get_dict (buffer);
        if (!weechat_aspell_spellers_already_ok (dict_list))
        {
            weechat_aspell_speller_free_all ();
            if (dict_list)
            {
                argv = weechat_string_split (dict_list, ",", 0, 0, &argc);
                if (argv)
                {
                    for (i = 0; i < argc; i++)
                    {
                        weechat_aspell_speller_new (argv[i]);
                    }
                    weechat_string_free_split (argv);
                }
            }
        }
    }
}

/*
 * weechat_aspell_buffer_switch_cb: callback for "buffer_switch" signel
 */

int
weechat_aspell_buffer_switch_cb (void *data, const char *signal,
                                 const char *type_data, void *signal_data)
{
    /* make C compiler happy */
    (void) data;
    (void) signal;
    (void) type_data;
    
    weechat_aspell_create_spellers (signal_data);
    
    return WEECHAT_RC_OK;
}

/*
 * weechat_aspell_iso_to_lang: convert an aspell iso lang code in its english
 *                             full name
 *
 */

char *
weechat_aspell_iso_to_lang (const char *code)
{
    int i;
    
    for (i = 0; langs_avail[i].code; i++)
    {
        if (strcmp (langs_avail[i].code, code) == 0)
            return strdup (langs_avail[i].name);
    }
    
    /* lang code not found */
    return strdup ("Unknown");
}


/*
 * weechat_aspell_iso_to_country: convert an aspell iso country code in its
 *                                english full name
 */

char *
weechat_aspell_iso_to_country (const char *code)
{
    int i;
    
    for (i = 0; countries_avail[i].code; i++)
    {
        if (strcmp (countries_avail[i].code, code) == 0)
            return strdup (countries_avail[i].name);
    }
    
    /* country code not found */
    return strdup ("Unknown");
}

/*
 * weechat_aspell_speller_list_dicts: list all aspell dict installed on system
 *                                    and display them
 */

void
weechat_aspell_speller_list_dicts ()
{
    char *country, *lang, *pos;
    char buffer[192];
    struct AspellConfig *config;
    AspellDictInfoList *list;
    AspellDictInfoEnumeration *el;
    const AspellDictInfo *dict;
    
    config = new_aspell_config();
    list = get_aspell_dict_info_list (config);
    el = aspell_dict_info_list_elements (list);
    
    weechat_printf (NULL, "");
    weechat_printf (NULL,
                    /* TRANSLATORS: "%s" is "aspell" */
                    _( "%s dictionaries list:"),
                    ASPELL_PLUGIN_NAME);
    
    while ((dict = aspell_dict_info_enumeration_next (el)))
    {
        country = NULL;
        pos = strchr (dict->code, '_');
        
        if (pos)
        {
            pos[0] = '\0';
            lang = weechat_aspell_iso_to_lang ((char*)dict->code);
            pos[0] = '_';
            country = weechat_aspell_iso_to_country (pos + 1);
        }
        else
            lang = weechat_aspell_iso_to_lang ((char*)dict->code);
        
        if (strlen (dict->jargon) == 0)
        {
            if (pos)
            {
                snprintf (buffer, sizeof (buffer), "%-22s %s (%s)",
                          dict->name, lang, country);
            }
            else
            {
                snprintf (buffer, sizeof (buffer), "%-22s %s",
                          dict->name, lang);
            }
        }
        else
        {
            if (pos)
            {
                snprintf (buffer, sizeof (buffer), "%-22s %s (%s - %s)",
                          dict->name, lang, country, dict->jargon);
            }
            else
            {
                snprintf (buffer, sizeof (buffer), "%-22s %s (%s)",
                          dict->name, lang, dict->jargon);
            }
        }
        
        weechat_printf (NULL, "  %s", buffer);
        
        if (lang)
            free (lang);
        if (country)
            free (country);
    }
    
    delete_aspell_dict_info_enumeration (el);
    delete_aspell_config (config);
}

/*
 * weechat_aspell_add_word : add a word in personal dictionary
 */

void
weechat_aspell_add_word (const char *lang, const char *word)
{
    struct t_aspell_speller *new_speller, *ptr_speller;

    new_speller = NULL;
    ptr_speller = weechat_aspell_speller_search (lang);
    if (!ptr_speller)
    {
        if (!weechat_aspell_speller_exists (lang))
        {
            weechat_printf (NULL,
                            _("%s: error: dictionary \"%s\" is not "
                              "available on your system"),
                            ASPELL_PLUGIN_NAME, lang);
            return;
        }
        new_speller = weechat_aspell_speller_new (lang);
        if (!new_speller)
            return;
        ptr_speller = new_speller;
    }

    if (aspell_speller_add_to_personal (ptr_speller->speller,
                                        word,
                                        strlen (word)) == 1)
    {
        weechat_printf (NULL,
                        _("%s: word \"%s\" added to personal dictionary"),
                        ASPELL_PLUGIN_NAME, word);
    }
    else
    {
        weechat_printf (NULL,
                        _("%s%s: failed to add word to personal "
                          "dictionary"),
                        weechat_prefix ("error"), ASPELL_PLUGIN_NAME);
    }
    
    if (new_speller)
        weechat_aspell_speller_free (new_speller);
}

/*
 * weechat_aspell_command_authorized: return 1 if command is authorized for
 *                                    spell checking, otherwise 0
 */

int
weechat_aspell_command_authorized (const char *command)
{
    int length_command, i;
    
    if (!command)
        return 1;
    
    length_command = strlen (command);
    
    for (i = 0; i < weechat_aspell_count_commands_to_check; i++)
    {
        if ((weechat_aspell_length_commands_to_check[i] == length_command)
            && (weechat_strcasecmp (command,
                                    weechat_aspell_commands_to_check[i]) == 0))
        {
            /* command is authorized */
            return 1;
        }
    }
    
    /* command is not authorized */
    return 0;
}

/*
 * weechat_aspell_string_is_url: detect if a word is an url
 */

int
weechat_aspell_string_is_url (const char *word)
{
    if ((weechat_strncasecmp(word,    "http://",     7) == 0)
        || (weechat_strncasecmp(word, "https://",    8) == 0)
        || (weechat_strncasecmp(word, "ftp://",      6) == 0)
        || (weechat_strncasecmp(word, "tftp://",     7) == 0)
        || (weechat_strncasecmp(word, "ftps://",     7) == 0)
        || (weechat_strncasecmp(word, "ssh://",      6) == 0)
        || (weechat_strncasecmp(word, "fish://",     7) == 0)
        || (weechat_strncasecmp(word, "dict://",     7) == 0)
        || (weechat_strncasecmp(word, "ldap://",     7) == 0)
        || (weechat_strncasecmp(word, "file://",     7) == 0)
        || (weechat_strncasecmp(word, "telnet://",   9) == 0)
        || (weechat_strncasecmp(word, "gopher://",   9) == 0)
        || (weechat_strncasecmp(word, "irc://",      6) == 0)
        || (weechat_strncasecmp(word, "ircs://",     7) == 0)
        || (weechat_strncasecmp(word, "irc6://",     7) == 0)
        || (weechat_strncasecmp(word, "irc6s://",    8) == 0)
        || (weechat_strncasecmp(word, "cvs://",      6) == 0)
        || (weechat_strncasecmp(word, "svn://",      6) == 0)
        || (weechat_strncasecmp(word, "svn+ssh://", 10) == 0)
        || (weechat_strncasecmp(word, "git://",      6) == 0))
        return 1;
    
    return 0;
}

/*
 * weechat_aspell_string_is_simili_number: detect if a word is made of chars and
 *                                         punctuation
 */

int
weechat_aspell_string_is_simili_number (const char *word)
{
    int utf8_char_int;
    
    if (!word || !word[0])
        return 0;
    
    while (word && word[0])
    {
        utf8_char_int = weechat_utf8_char_int (word);
        if (!iswpunct (utf8_char_int) && !iswdigit (utf8_char_int))
            return 0;
        word = weechat_utf8_next_char (word);
    }
    
    /* there's only digit or punctuation */
    return 1;
}

/*
 * weechat_aspell_check_word: spell check a word
 *                            return 1 if word is ok, 0 if word is misspelled
 */

int
weechat_aspell_check_word (struct t_gui_buffer *buffer, const char *word)
{
    struct t_aspell_speller *ptr_speller;
    int rc;
    
    rc = 0;
    
    /* word too small? then do not check word */
    if ((weechat_config_integer (weechat_aspell_config_check_word_min_length) > 0)
        && ((int)strlen (word) < weechat_config_integer (weechat_aspell_config_check_word_min_length)))
        rc = 1;
    else
    {
        /* word is URL? then do not check word */
        if (weechat_aspell_string_is_url (word))
            rc = 1;
        else
        {
            /* word is a number? then do not check word */
            if (weechat_aspell_string_is_simili_number (word))
                rc = 1;
            else
            {
                /* word is a nick of nicklist on this buffer? then do not check word */
                if (weechat_nicklist_search_nick (buffer, NULL, word))
                    rc = 1;
                else
                {
                    /* check word with all spellers for this buffer (order is important) */
                    for (ptr_speller = weechat_aspell_spellers; ptr_speller;
                         ptr_speller = ptr_speller->next_speller)
                    {
                        if (aspell_speller_check (ptr_speller->speller, word, -1) == 1)
                        {
                            rc = 1;
                            break;
                        }
                    }
                }
            }
        }
    }
    
    return rc;
}

/*
 * weechat_aspell_modifier_cb: modifier for input text
 */

char *
weechat_aspell_modifier_cb (void *data, const char *modifier,
                            const char *modifier_data, const char *string)
{
    long unsigned int value;
    struct t_gui_buffer *buffer;
    char *result, *ptr_string, *pos_space, *ptr_end, save_end;
    const char *color_normal, *color_error;
    int utf8_char_int, char_size;
    int length, index_result, length_word, word_ok;
    int length_color_normal, length_color_error;
    
    /* make C compiler happy */
    (void) data;
    (void) modifier;
    
    if (!string || !string[0])
        return NULL;
    
    sscanf (modifier_data, "%lx", &value);
    buffer = (struct t_gui_buffer *)value;
    
    if (!weechat_aspell_spellers)
        return NULL;
    
    /* check text search only if option is enabled */
    if (weechat_buffer_get_integer (buffer, "text_search")
        && !weechat_config_boolean (weechat_aspell_config_check_during_search))
        return NULL;
    
    /*
     * for performance: return last stirng built if input string is the
     * same (for example user just change cursor position, or input text is
     * refreshed with same content)
     */
    if (aspell_last_modifier_string
        && (strcmp (string, aspell_last_modifier_string) == 0))
    {
        return (aspell_last_modifier_result) ?
            strdup (aspell_last_modifier_result) : NULL;
    }
    
    /* free last modifier string and result */
    if (aspell_last_modifier_string)
    {
        free (aspell_last_modifier_string);
        aspell_last_modifier_string = NULL;
    }
    if (aspell_last_modifier_result)
    {
        free (aspell_last_modifier_result);
        aspell_last_modifier_result = NULL;
    }
    
    /* save last modifier string received */
    aspell_last_modifier_string = strdup (string);
    
    color_normal = weechat_color ("bar_fg");
    length_color_normal = strlen (color_normal);
    color_error = weechat_color (weechat_config_string (weechat_aspell_config_look_color));
    length_color_error = strlen (color_error);
    
    length = strlen (string);
    result = malloc (length + (length * length_color_error) + 1);
    
    if (result)
    {
        result[0] = '\0';
        
        ptr_string = aspell_last_modifier_string;
        index_result = 0;
        
        /* check if string is a command */
        if (!weechat_string_input_for_buffer (ptr_string))
        {
            char_size = weechat_utf8_char_size (ptr_string);
            ptr_string += char_size;
            pos_space = ptr_string;
            while (pos_space && pos_space[0] && (pos_space[0] != ' '))
            {
                pos_space = weechat_utf8_next_char (pos_space);
            }
            if (!pos_space || !pos_space[0])
            {
                free (result);
                return NULL;
            }
            
            pos_space[0] = '\0';
            
            /* exit if command is not authorized for spell checking */
            if (!weechat_aspell_command_authorized (ptr_string))
            {
                free (result);
                return NULL;
            }
            memcpy (result + index_result, aspell_last_modifier_string, char_size);
            index_result += char_size;
            strcpy (result + index_result, ptr_string);
            index_result += strlen (ptr_string);
            
            pos_space[0] = ' ';
            ptr_string = pos_space;
        }
        
        while (ptr_string[0])
        {
            /* find start of word */
            utf8_char_int = weechat_utf8_char_int (ptr_string);
            while ((!iswalnum (utf8_char_int) && (utf8_char_int != '\'')
                    && (utf8_char_int != '-'))
                   || iswspace (utf8_char_int))
            {
                char_size = weechat_utf8_char_size (ptr_string);
                memcpy (result + index_result, ptr_string, char_size);
                index_result += char_size;
                ptr_string += char_size;
                if (!ptr_string[0])
                    break;
                utf8_char_int = weechat_utf8_char_int (ptr_string);
            }
            if (!ptr_string[0])
                break;
            
            ptr_end = weechat_utf8_next_char (ptr_string);
            utf8_char_int = weechat_utf8_char_int (ptr_end);
            while (iswalnum (utf8_char_int) || (utf8_char_int == '\'')
                   || (utf8_char_int == '-'))
            {
                ptr_end = weechat_utf8_next_char (ptr_end);
                if (!ptr_end[0])
                    break;
                utf8_char_int = weechat_utf8_char_int (ptr_end);
            }
            save_end = ptr_end[0];
            ptr_end[0] = '\0';
            length_word = ptr_end - ptr_string;
            
            if ((save_end != '\0')
                || (weechat_config_integer (weechat_aspell_config_check_real_time)))
                word_ok = weechat_aspell_check_word (buffer, ptr_string);
            else
                word_ok = 1;
            
            /* add error color */
            if (!word_ok)
            {
                strcpy (result + index_result, color_error);
                index_result += length_color_error;
            }
            
            /* add word */
            strcpy (result + index_result, ptr_string);
            index_result += length_word;
            
            /* add normal color (after misspelled word) */
            if (!word_ok)
            {
                strcpy (result + index_result, color_normal);
                index_result += length_color_normal;
            }
            
            if (save_end == '\0')
                break;

            ptr_end[0] = save_end;
            ptr_string = ptr_end;
        }
        
        result[index_result] = '\0';
    }
    
    if (!result)
        return NULL;
    
    aspell_last_modifier_result = strdup (result);
    return result;
}

/*
 * weechat_aspell_command_cb: callback for /aspell command
 */

int
weechat_aspell_command_cb (void *data, struct t_gui_buffer *buffer,
                           int argc, char **argv, char **argv_eol)
{
    char *dicts;
    
    /* make C compiler happy */
    (void) data;
    
    if (argc > 1)
    {
        if (weechat_strcasecmp (argv[1], "dictlist") == 0)
        {
            weechat_aspell_speller_list_dicts ();
            return WEECHAT_RC_OK;
        }
        if (weechat_strcasecmp (argv[1], "addword") == 0)
        {
            if (argc > 3)
                weechat_aspell_add_word (argv[2], argv_eol[3]);
            else
            {
                if (!weechat_aspell_spellers)
                {
                    weechat_printf (NULL,
                                    _("%s%s: no dictionary on this buffer for "
                                      "adding word"),
                                    weechat_prefix ("error"),
                                    ASPELL_PLUGIN_NAME);
                }
                else if (weechat_aspell_spellers->next_speller)
                {
                    weechat_printf (NULL,
                                    _("%s%s: many dictionaries are defined for "
                                      "this buffer, please specify dictionary"),
                                    weechat_prefix ("error"),
                                    ASPELL_PLUGIN_NAME);
                }
                else
                    weechat_aspell_add_word (weechat_aspell_spellers->lang,
                                             argv_eol[2]);
            }
            return WEECHAT_RC_OK;
        }
        if (weechat_strcasecmp (argv[1], "enable") == 0)
        {
            if (argc > 2)
            {
                dicts = weechat_string_replace (argv_eol[2], " ", "");
                weechat_aspell_set_dict (buffer,
                                         (dicts) ? dicts : argv[2]);
                if (dicts)
                    free (dicts);
            }
            return WEECHAT_RC_OK;
        }
        if (weechat_strcasecmp (argv[1], "disable") == 0)
        {
            weechat_aspell_set_dict (buffer, NULL);
            return WEECHAT_RC_OK;
        }
    }
    
    return WEECHAT_RC_ERROR;
}

/*
 * weechat_aspell_completion_langs_cb: completion with aspell langs
 */

int
weechat_aspell_completion_langs_cb (void *data, const char *completion_item,
                                    struct t_gui_buffer *buffer,
                                    struct t_gui_completion *completion)
{
    int i;
    
    /* make C compiler happy */
    (void) data;
    (void) completion_item;
    (void) buffer;
    
    for (i = 0; langs_avail[i].code; i++)
    {
        weechat_hook_completion_list_add (completion, langs_avail[i].code,
                                          0, WEECHAT_LIST_POS_SORT);
    }
    
    return WEECHAT_RC_OK;
}

/*
 * weechat_plugin_init : init aspell plugin
 */

int
weechat_plugin_init (struct t_weechat_plugin *plugin, int argc, char *argv[])
{
    /* make C compiler happy */
    (void) argc;
    (void) argv;
    
    weechat_plugin = plugin;
    
    if (!weechat_aspell_config_init ())
        return WEECHAT_RC_ERROR;
    
    if (weechat_aspell_config_read () < 0)
        return WEECHAT_RC_ERROR;
    
    /* command /aspell */
    weechat_hook_command ("aspell",
                          N_("aspell plugin configuration"),
                          N_("dictlist | enable lang | disable | "
                             "addword [lang] word"),
                          N_("dictlist: show installed dictionaries\n"
                             "  enable: enable aspell on current buffer\n"
                             " disable: disable aspell on current buffer\n"
                             " addword: add a word in your personal aspell "
                             "dictionary\n"
                             "\n"
                             "Input line beginning with a '/' is not checked, "
                             "except for some commands."),
                          "dictlist"
                          " || enable %(aspell_langs)"
                          " || disable"
                          " || addword",
                          &weechat_aspell_command_cb, NULL);
    weechat_hook_completion ("aspell_langs",
                             N_("list of supported langs for aspell"),
                             &weechat_aspell_completion_langs_cb, NULL);
    
    /* callback for buffer_switch */
    weechat_hook_signal ("buffer_switch",
                         &weechat_aspell_buffer_switch_cb, NULL);
    
    /*
     * callback for spell checking input text
     * we use a low priority here, so that other modifiers "input_text_display"
     * (from other plugins) will be called before this one
     */
    weechat_hook_modifier ("500|input_text_display",
                           &weechat_aspell_modifier_cb, NULL);
    
    weechat_aspell_create_spellers (weechat_current_buffer ());
    
    return WEECHAT_RC_OK;
}

/*
 * weechat_plugin_end : end aspell plugin
 */

int
weechat_plugin_end (struct t_weechat_plugin *plugin)
{
    /* make C compiler happy */
    (void) plugin;
    
    weechat_aspell_config_write ();
    
    weechat_aspell_speller_free_all ();
    
    if (aspell_last_modifier_string)
        free (aspell_last_modifier_string);
    if (aspell_last_modifier_result)
        free (aspell_last_modifier_result);
    
    weechat_aspell_config_free ();
    
    return WEECHAT_RC_OK;
}