#
# Copyright (c) 2008-2010 by FlashCode <flashcode@flashtux.org>
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
#
# Set WeeChat and plugins options interactively.
#
# History:
# 2010-02-02, rettub <rettub@gmx.net>:
#     version 0.9: turn all the help stuff off if option 'show_help_bar' is 'off',
#                  new key binding <alt>-<v> to toggle help_bar and help stuff on/off
# 2010-01-30, nils_2 <weechatter@arcor.de>:
#     version 0.8: fix error when option does not exist
# 2010-01-24, FlashCode <flashcode@flashtux.org>:
#     version 0.7: display iset bar only on iset buffer
# 2010-01-22, nils_2 <weechatter@arcor.de> and drubin:
#     version 0.6: add description in a bar, fix singular/plural bug in title bar,
#                  fix selected line when switching buffer
# 2009-06-21, FlashCode <flashcode@flashtux.org>:
#     version 0.5: fix bug with iset buffer after /upgrade
# 2009-05-02, FlashCode <flashcode@flashtux.org>:
#     version 0.4: sync with last API changes
# 2009-01-04, FlashCode <flashcode@flashtux.org>:
#     version 0.3: open iset buffer when /iset command is executed
# 2009-01-04, FlashCode <flashcode@flashtux.org>:
#     version 0.2: use null values for options, add colors, fix refresh bugs,
#                  use new keys to reset/unset options, sort options by name,
#                  display number of options in buffer's title
# 2008-11-05, FlashCode <flashcode@flashtux.org>:
#     version 0.1: first official version
# 2008-04-19, FlashCode <flashcode@flashtux.org>:
#     script creation

use strict;

my $version = "0.9";

my $iset_buffer = "";
my @options_names = ();
my @options_types = ();
my @options_values = ();
my @options_is_null = ();
my $option_max_length = 0;
my $current_line = 0;
my $filter = "*";
my $description = "";
my $options_name_copy = "";

my %default_options = ("show_help_bar"              => "on",
                       "show_help_extra_info"       => "on",
                       "color_option"               => "default",
                       "color_option_selected"      => "white",
                       "color_type"                 => "brown",
                       "color_type_selected"        => "yellow",
                       "color_value"                => "cyan",
                       "color_value_selected"       => "lightcyan",
                       "color_value_undef"          => "green",
                       "color_value_undef_selected" => "lightgreen",
                       "color_bg_selected"          => "red",
                       "color_help_option_name"     => "white",
                       "color_help_text"            => "default",
                       "color_help_default_value"   => "green",
    );

sub iset_init_config
{
    foreach my $option (keys %default_options)
    {
        if (!weechat::config_is_set_plugin($option))
        {
            weechat::config_set_plugin($option, $default_options{$option});
        }
    }
}

sub iset_title
{
    if ($iset_buffer ne "")
    {
        my $postfix = "s";
        my $option_txt  = " option";
        my $opt_txt = $option_txt;
        $opt_txt = $option_txt.$postfix if (@options_names > 1);
        weechat::buffer_set($iset_buffer, "title",
                            "Interactive set (iset.pl v$version)  |  "
                            ."Filter: ".weechat::color("yellow").$filter.weechat::color("default")."  |  "
                            .@options_names.$opt_txt);
    }
}

sub iset_filter
{
    $filter = $_[0];
    $filter = "$1.*" if ($filter =~ /f (.*)/);
    $filter = "*.$1.*" if ($filter =~ /s (.*)/);
    if ((substr($filter, 0, 1) ne "*") && (substr($filter, -1, 1) ne "*"))
    {
        $filter = "*".$filter."*";
    }
}

sub iset_buffer_input
{
    my ($data, $buffer, $string) = ($_[0], $_[1], $_[2]);
    iset_filter($string);
    iset_get_options();
    weechat::buffer_clear($buffer);
    iset_title();
    $current_line = 0;
    iset_refresh();
    return weechat::WEECHAT_RC_OK;
}

sub iset_buffer_close
{
    $iset_buffer = "";
    
    return weechat::WEECHAT_RC_OK;
}

sub iset_init
{
    $current_line = 0;
    $iset_buffer = weechat::buffer_search("perl", "iset");
    if ($iset_buffer eq "")
    {
        $iset_buffer = weechat::buffer_new("iset", "iset_buffer_input", "", "iset_buffer_close", "");
    }
    if ($iset_buffer ne "")
    {
        weechat::buffer_set($iset_buffer, "type", "free");
        iset_title();
        weechat::buffer_set($iset_buffer, "key_bind_ctrl-L",        "/iset **refresh");
        weechat::buffer_set($iset_buffer, "key_bind_meta2-A",       "/iset **up");
        weechat::buffer_set($iset_buffer, "key_bind_meta2-B",       "/iset **down");
        weechat::buffer_set($iset_buffer, "key_bind_meta- ",        "/iset **toggle");
        weechat::buffer_set($iset_buffer, "key_bind_meta-+",        "/iset **incr");
        weechat::buffer_set($iset_buffer, "key_bind_meta--",        "/iset **decr");
        weechat::buffer_set($iset_buffer, "key_bind_meta-imeta-r",  "/iset **reset");
        weechat::buffer_set($iset_buffer, "key_bind_meta-imeta-u",  "/iset **unset");
        weechat::buffer_set($iset_buffer, "key_bind_meta-ctrl-J",   "/iset **set");
        weechat::buffer_set($iset_buffer, "key_bind_meta-ctrl-M",   "/iset **set");
        weechat::buffer_set($iset_buffer, "key_bind_meta-meta2-1~", "/iset **scroll_top");
        weechat::buffer_set($iset_buffer, "key_bind_meta-meta2-4~", "/iset **scroll_bottom");
        weechat::buffer_set($iset_buffer, "key_bind_meta-v",        "/iset **toggle_help");
    }
}

sub iset_get_options
{
    @options_names = ();
    @options_types = ();
    @options_values = ();
    @options_is_null = ();
    $option_max_length = 0;
    my %options = ();
    my $i = 0;
    my $infolist = weechat::infolist_get("option", "", $filter);
    while (weechat::infolist_next($infolist))
    {
        my $name = weechat::infolist_string($infolist, "full_name");
        my $type = weechat::infolist_string($infolist, "type");
        my $value = weechat::infolist_string($infolist, "value");
        my $is_null = weechat::infolist_integer($infolist, "value_is_null");
        $options{$name}{"type"} = $type;
        $options{$name}{"value"} = $value;
        $options{$name}{"is_null"} = $is_null;
        $option_max_length = length($name) if (length($name) > $option_max_length);
        $i++;
    }
    weechat::infolist_free($infolist);
    foreach my $name (sort keys %options)
    {
        push(@options_names, $name);
        push(@options_types, $options{$name}{"type"});
        push(@options_values, $options{$name}{"value"});
        push(@options_is_null, $options{$name}{"is_null"});
    }
}

sub iset_refresh_line
{
    if ($iset_buffer ne "")
    {
        my $y = $_[0];
        if ($y <= $#options_names)
        {
            return if (! defined($options_types[$y]));
            my $format = sprintf("%%s%%-%ds %%s %%-7s %%s %%s%%s%%s", $option_max_length);
            my $around = "";
            $around = "\"" if ((!$options_is_null[$y]) && ($options_types[$y] eq "string"));
            my $color1 = weechat::color(weechat::config_get_plugin("color_option"));
            my $color2 = weechat::color(weechat::config_get_plugin("color_type"));
            my $color3 = "";
            if ($options_is_null[$y])
            {
                $color3 = weechat::color(weechat::config_get_plugin("color_value_undef"));
            }
            else
            {
                $color3 = weechat::color(weechat::config_get_plugin("color_value"));
            }
            if ($y == $current_line)
            {
                $color1 = weechat::color(weechat::config_get_plugin("color_option_selected").",".weechat::config_get_plugin("color_bg_selected"));
                $color2 = weechat::color(weechat::config_get_plugin("color_type_selected").",".weechat::config_get_plugin("color_bg_selected"));
                if ($options_is_null[$y])
                {
                    $color3 = weechat::color(weechat::config_get_plugin("color_value_undef_selected").",".weechat::config_get_plugin("color_bg_selected"));
                }
                else
                {
                    $color3 = weechat::color(weechat::config_get_plugin("color_value_selected").",".weechat::config_get_plugin("color_bg_selected"));
                }
            }
            my $value = $options_values[$y];
            $value = "(undef)" if ($options_is_null[$y]);
            my $strline = sprintf($format,
                                  $color1, $options_names[$y],
                                  $color2, $options_types[$y],
                                  $color3, $around, $value, $around);
            weechat::print_y($iset_buffer, $y, $strline);
        }
    }
}

sub iset_refresh
{
    iset_title();
    if (($iset_buffer ne "") && ($#options_names >= 0))
    {
        foreach my $y (0 .. $#options_names)
        {
            iset_refresh_line($y);
        }
    }
    weechat::bar_item_update("isetbar_help") if weechat::config_get_plugin('show_help_bar')  eq 'on';
}

sub iset_full_refresh
{
    if ($iset_buffer ne "")
    {
        weechat::buffer_clear($iset_buffer);
        iset_get_options();
        iset_set_current_line($current_line);
        iset_refresh();
        weechat::command($iset_buffer, "/window refresh");
    }
}

sub iset_set_current_line
{
    my $new_current_line = $_[0];
    my $old_current_line = $current_line;
    $current_line = $new_current_line;
    $current_line = $#options_names if ($current_line > $#options_names);
    if ($old_current_line != $current_line)
    {
        iset_refresh_line($old_current_line);
        iset_refresh_line($current_line);
        weechat::bar_item_update("isetbar_help") if weechat::config_get_plugin('show_help_bar') eq 'on';
    }
}

sub iset_signal_window_scrolled_cb
{
    my ($data, $signal, $signal_data) = ($_[0], $_[1], $_[2]);
    if ($iset_buffer ne "")
    {
        my $infolist = weechat::infolist_get("window", $signal_data, "");
        if (weechat::infolist_next($infolist))
        {
            if (weechat::infolist_pointer($infolist, "buffer") eq $iset_buffer)
            {
                my $old_current_line = $current_line;
                my $new_current_line = $current_line;
                my $start_line_y = weechat::infolist_integer($infolist, "start_line_y");
                my $chat_height = weechat::infolist_integer($infolist, "chat_height");
                $new_current_line += $chat_height if ($new_current_line < $start_line_y);
                $new_current_line -= $chat_height if ($new_current_line >= $start_line_y + $chat_height);
                $new_current_line = $start_line_y if ($new_current_line < $start_line_y);
                $new_current_line = $start_line_y + $chat_height - 1 if ($new_current_line >= $start_line_y + $chat_height);
                iset_set_current_line($new_current_line);
            }
        }
        weechat::infolist_free($infolist);
    }
    
    return weechat::WEECHAT_RC_OK;
}

sub iset_check_line_outside_window
{
    if ($iset_buffer ne "")
    {
        my $infolist = weechat::infolist_get("window", "", "current");
        if (weechat::infolist_next($infolist))
        {
            my $start_line_y = weechat::infolist_integer($infolist, "start_line_y");
            my $chat_height = weechat::infolist_integer($infolist, "chat_height");
            if ($start_line_y > $current_line)
            {
                weechat::command($iset_buffer, "/window scroll -".($start_line_y - $current_line));
            }
            else
            {
                if ($start_line_y <= $current_line - $chat_height)
                {
                    weechat::command($iset_buffer, "/window scroll +".($current_line - $start_line_y - $chat_height + 1));
                }
            }
        }
        weechat::infolist_free($infolist);
    }
}

sub iset_get_option_name_index
{
    my $option_name = $_[0];
    my $index = 0;
    while ($index <= $#options_names)
    {
        return -1 if ($options_names[$index] gt $option_name);
        return $index if ($options_names[$index] eq $option_name);
        $index++;
    }
    return -1;
}

sub iset_config_cb
{
    my ($data, $option_name, $value) = ($_[0], $_[1], $_[2]);
    
    if ($iset_buffer ne "")
    {
        my $index = iset_get_option_name_index($option_name);
        if ($index >= 0)
        {
            # refresh info about changed option
            my $infolist = weechat::infolist_get("option", "", $option_name);
            if ($infolist)
            {
                weechat::infolist_next($infolist);
                if (weechat::infolist_fields($infolist))
                {
                    $options_types[$index] = weechat::infolist_string($infolist, "type");
                    $options_values[$index] = weechat::infolist_string($infolist, "value");
                    $options_is_null[$index] = weechat::infolist_integer($infolist, "value_is_null");
                    weechat::infolist_free($infolist);
                    iset_refresh_line($index);
                }
                else
                {
                    iset_full_refresh();
                }
            }
        }
        else
        {
            iset_full_refresh() if ($option_name ne "weechat.bar.isetbar.hidden");
        }
        if ($option_name eq "plugins.var.perl.iset.show_help_bar")
        {
            my $show = 1;
            $show = 0 if ($value eq "off");
            iset_show_bar($show);
        }
    }
    
    return weechat::WEECHAT_RC_OK;
}

sub iset_set_option
{
    my $option = weechat::config_get($_[0]);
    weechat::config_option_set($option, $_[1], 1) if ($option ne "");
}

sub iset_reset_option
{
    my $option = weechat::config_get($_[0]);
    weechat::config_option_reset($option, 1) if ($option ne "");
}

sub iset_unset_option
{
    my $option = weechat::config_get($_[0]);
    weechat::config_option_unset($option) if ($option ne "");
    weechat::buffer_clear($iset_buffer);
    iset_refresh();
}

sub iset_cmd_cb
{
    my ($data, $buffer, $args) = ($_[0], $_[1], $_[2]);

    if (($args ne "") && (substr($args, 0, 2) ne "**"))
    {
        iset_filter($args);
    }
    
    if ($iset_buffer eq "")
    {
        iset_init();
        iset_get_options();
        iset_refresh();
    }
    
    weechat::buffer_set($iset_buffer, "display", "1");
    
    if ($args ne "")
    {
        if ($args eq "**refresh")
        {
            iset_full_refresh();
        }
        if ($args eq "**up")
        {
            if ($current_line > 0)
            {
                $current_line--;
                iset_refresh_line($current_line + 1);
                iset_refresh_line($current_line);
                iset_check_line_outside_window();
            }
        }
        if ($args eq "**down")
        {
            if ($current_line < $#options_names)
            {
                $current_line++;
                iset_refresh_line($current_line - 1);
                iset_refresh_line($current_line);
                iset_check_line_outside_window();
            }
        }
        if ($args eq "**scroll_top")
        {
            my $old_current_line = $current_line;
            $current_line = 0;
            iset_refresh_line ($old_current_line);
            iset_refresh_line ($current_line);
            weechat::command($iset_buffer, "/window scroll_top");
        }
        if ($args eq "**scroll_bottom")
        {
            my $old_current_line = $current_line;
            $current_line = $#options_names;
            iset_refresh_line ($old_current_line);
            iset_refresh_line ($current_line);
            weechat::command($iset_buffer, "/window scroll_bottom");
        }
        if ($args eq "**toggle")
        {
            if ($options_types[$current_line] eq "boolean")
            {
                iset_set_option($options_names[$current_line], "toggle");
            }
        }
        if ($args eq "**incr")
        {
            if (($options_types[$current_line] eq "integer")
                || ($options_types[$current_line] eq "color"))
            {
                iset_set_option($options_names[$current_line], "++1");
            }
        }
        if ($args eq "**decr")
        {
            if (($options_types[$current_line] eq "integer")
                || ($options_types[$current_line] eq "color"))
            {
                iset_set_option($options_names[$current_line], "--1");
            }
        }
        if ($args eq "**reset")
        {
            iset_reset_option($options_names[$current_line]);
        }
        if ($args eq "**unset")
        {
            iset_unset_option($options_names[$current_line]);
        }
        if ($args eq "**toggle_help")
        {
            if (weechat::config_get_plugin("show_help_bar") eq "on")
            {
                weechat::config_set_plugin("show_help_bar", "off");
            }
            else
            {
                weechat::config_set_plugin("show_help_bar", "on");
            }
        }
        if ($args eq "**set")
        {
            my $quote = "";
            my $value = $options_values[$current_line];
            if ($options_is_null[$current_line])
            {
                $value = "null";
            }
            else
            {
                $quote = "\"" if ($options_types[$current_line] eq "string");
            }
            weechat::buffer_set($iset_buffer, "input", "/set ".$options_names[$current_line]." ".$quote.$value.$quote);
        }
    }
    weechat::bar_item_update("isetbar_help") if weechat::config_get_plugin('show_help_bar') eq 'on';
    return weechat::WEECHAT_RC_OK;
}

sub iset_get_help
{
    return '' unless weechat::config_get_plugin('show_help_bar') eq 'on';

    if (not defined $options_names[$current_line])
    {
        return "No option selected. Set a new filter using command line (use '*' to see all options)";
    }
    if ($options_name_copy eq $options_names[$current_line])
    {
        return $description;
    }
    $options_name_copy = $options_names[$current_line];
    my $optionlist ="";
    $optionlist = weechat::infolist_get("option", "", $options_names[$current_line]);
    weechat::infolist_next($optionlist);
    my $full_name = weechat::infolist_string($optionlist,"full_name");
    my $option_desc = "";
    my $option_default_value = "";
    my $option_range = "";
    my $re = qq(\Q$full_name);
    if (grep (/^$re$/,$options_names[$current_line]))
    {
        $option_desc = weechat::infolist_string($optionlist, "description_nls");
        $option_desc = weechat::infolist_string($optionlist, "description") if ($option_desc eq "");
        $option_desc = "No help found" if ($option_desc eq "");
        $option_default_value = weechat::infolist_string($optionlist, "default_value");
        if (weechat::infolist_string($optionlist, "type") eq "integer"
            && weechat::infolist_string($optionlist, "string_values") eq "")
        {
            $option_range = weechat::infolist_integer($optionlist, "min")
                ." .. ".weechat::infolist_integer($optionlist, "max");
        }
    }
    weechat::infolist_free($optionlist);
    iset_title();
    
    $description = weechat::color(weechat::config_get_plugin("color_help_option_name")).$options_names[$current_line]
        .weechat::color("bar_fg").": "
        .weechat::color(weechat::config_get_plugin("color_help_text")).$option_desc;
    
    if (weechat::config_get_plugin("show_help_extra_info") eq "on")
    {
        $description .=
            weechat::color("bar_delim")." ["
            .weechat::color("bar_fg")."default: "
            .weechat::color("bar_delim")."\""
            .weechat::color(weechat::config_get_plugin("color_help_default_value")).$option_default_value
            .weechat::color("bar_delim")."\"";
        if ($option_range ne "")
        {
            $description .= weechat::color("bar_fg").", values: ".$option_range;
        }
        $description .= weechat::color("bar_delim")."]";
    }
    
    return $description;
}

sub iset_check_condition_isetbar_cb
{
    my ($data, $modifier, $modifier_data, $string) = ($_[0], $_[1], $_[2], $_[3]);
    my $buffer = weechat::window_get_pointer($modifier_data, "buffer");
    if ($buffer ne "")
    {
        if ((weechat::buffer_get_string($buffer, "plugin") eq "perl")
            && (weechat::buffer_get_string($buffer, "name") eq "iset"))
        {
            return "1";
        }
    }
    return "0";
}

sub iset_show_bar
{
    my $show = $_[0];
    my $barhidden = weechat::config_get("weechat.bar.isetbar.hidden");
    if ($barhidden)
    {
        if ($show)
        {
            if (weechat::config_get_plugin("show_help_bar") eq "on")
            {
                if (weechat::config_boolean($barhidden))
                {
                    weechat::config_option_set($barhidden, 0, 1);
                }
            }
        }
        else
        {
            if (!weechat::config_boolean($barhidden))
            {
                weechat::config_option_set($barhidden, 1, 1);
            }
        }
    }
}

sub iset_signal_buffer_switch_cb
{
    my $buffer_pointer = $_[2];
    my $show_bar = 0;
    $show_bar = 1 if (weechat::buffer_get_integer($iset_buffer, "num_displayed") > 0);
    iset_show_bar($show_bar);
    iset_check_line_outside_window() if ($buffer_pointer eq $iset_buffer);
    return weechat::WEECHAT_RC_OK;
}

sub iset_item_cb()
{
    return iset_get_help();
}

sub iset_end()
{
    # when script is unloaded, we hide bar
    iset_show_bar(0);
}

weechat::register("iset", "FlashCode <flashcode\@flashtux.org>", $version, "GPL3", "Interactive Set for configuration options", "iset_end", "");
weechat::hook_command("iset", "Interactive set", "[f file] [s section] [text]",
                      "f file    : show options for a file (for example: 'f weechat' or 'f irc')\n".
                      "s section : show options for a section (for example: 's look')\n".
                      "text      : show options with 'text' in name (for example: 'nicklist')\n\n".
                      "Keys for iset buffer:\n".
                      "up,down        : move one option up/down\n".
                      "pgup,pdwn      : move one page up/down\n".
                      "ctrl+'L'       : refresh options and screen\n".
                      "alt+space      : toggle boolean on/off\n".
                      "alt+'+'        : increase value (for integer or color)\n".
                      "alt+'-'        : decrease value (for integer or color)\n".
                      "alt+'I',alt+'R': reset value of option\n".
                      "alt+'I',alt+'U': unset option\n".
                      "alt+enter      : set new value for option (edit it with command line)\n".
                      "text,enter     : set a new filter using command line (use '*' to see all options)\n".
                      "alt+'V'        : toggle help bar\n",
                      "", "iset_cmd_cb", "");
weechat::hook_signal("window_scrolled", "iset_signal_window_scrolled_cb", "");
weechat::hook_signal("buffer_switch", "iset_signal_buffer_switch_cb","");
weechat::hook_config("*", "iset_config_cb", "");
weechat::bar_item_new("isetbar_help", "iset_item_cb", "");
weechat::bar_new("isetbar", "on", "0", "window", "", "top", "horizontal",
                 "vertical", "3", "3", "default", "cyan", "default", "1",
                 "isetbar_help");
weechat::hook_modifier("bar_condition_isetbar", "iset_check_condition_isetbar_cb", "");
iset_init_config();
$iset_buffer = weechat::buffer_search("perl", "iset");
iset_init() if ($iset_buffer ne "");