package lang;

use diagnostics;
use strict;

use common qw(:file);
use commands;
use cpio;
use log;

# key (to be used in $LC_ALL), [0] = english name, [1] = charset encoding,
# [2] = value for $LANG, [3] = value for LANGUAGE (a list of possible
# languages, carefully choosen)
my @fields =
my %languages = (
  "en"  => [ "English",			undef,	      "en", "en_US" ],
"fr_FR" => [ "French (France)",		"iso-8859-1", "fr", "fr_FR" ],
"de_DE" => [ "German (Germany)",	"iso-8859-1", "de", "de_DE" ],
  "hu"  => [ "Hungarian", 		"iso-8859-2", "hu", "hu" ],
  "is"  => [ "Icelandic", 		"iso-8859-1", "is", "is" ],
  "id"  => [ "Indonesian",		"iso-8859-1", "id", "id" ],
  "it"  => [ "Italian",   		"iso-8859-1", "it", "it_IT" ],
  "ja"  => [ "Japanese",		"jisx0208",   "ja", "ja_JP.ujis" ],
  "no"  => [ "Norwegian (Bokmaal)",	"iso-8859-1", "no", "no:no\@nynorsk" ],
"no\@nynorsk" => [ "Norwegian (Nynorsk)","iso-8859-1","no", "no\@nynorsk" ],
"pt_BR" => [ "Portuguese (Brazil)",	"iso-8859-1", "pt", "pt_BR:pt_PT" ],
"pt_PT" => [ "Portuguese (Portugal)",	"iso-8859-1", "pt", "pt_PT:pt_BR" ],
  "ro"  => [ "Romanian",  		"iso-8859-2", "ro", "ro" ],
  "ru"  => [ "Russian",   		"koi8-r",     "ru", "ru" ],
  "sk"  => [ "Slovak",    		"iso-8859-2", "sk", "sk" ],
"es_ES" => [ "Spanish (Spain)",		"iso-8859-1", "es", "es" ],
  "tr"  => [ "Turkish",	 		"iso-8859-9", "tr", "tr" ],
  "uk"  => [ "Ukrainian", 		"koi8-u",     "uk", "uk" ],
  "wa"  => [ "Walon",     		"iso-8859-1", "wa", "wa:fr_BE" ],
);

my %charsets = (
  "armscii-8"  => [ "arm8.fnt",			"armscii8",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-*helv*-medium-r-normal--14-*-*-*-*-armscii-8" ],
  "iso-8859-1" => [ "lat0-sun16.psf",		"iso15", 
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1" ],
  "iso-8859-2" => [ "lat2-sun16.psf",		"iso02",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-2" ],
  "iso-8859-3" => [ "iso03.f16",		"iso03",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-3" ],
  "iso-8859-4" => [ "lat4u-16.psf",		"iso04",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-4" ],
  "iso-8859-5" => [ "iso05.f16",		"iso05",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-5" ],
# arabic needs special console driver for text mode [acon]
# (and gtk support isn't done yet)
  "iso-8859-6" => [ "iso06.f16",		"iso06",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-6" ],
  "iso-8859-7" => [ "iso07.f16",		"iso07",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-7" ],
# hebrew needs special console driver for text mode (none yet)
# (and gtk support isn't done yet)
  "iso-8859-8" => [ "iso08.f16",		"iso08",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-8" ],
  "iso-8859-9" => [ "lat5-16.psf",		"iso09",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-9" ],
  "iso-8859-15" => [ "lat0-sun16.psf",		"iso15",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-15" ],
# japanese needs special console driver for text mode [kon2]
  "jisx0208"   => [ "????",			"????",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"-*-*-medium-r-normal--14-*-*-*-*-*-jisx0208.1983-0," .
	"-*-*-medium-r-normal--14-*-*-*-*-*-jisx0201.1976-0" ],
  "koi8-r"     => [ "Cyr_a8x16.psf",		"koi2alt",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-helvetica-medium-r-normal--14-*-*-*-*-koi8-r" ],
  "koi8-u"     => [ "ruscii_8x16.psf",		"koi2alt",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-helvetica-medium-r-normal--14-*-*-*-*-koi8-u" ],
  "tcvn"       => [ "tcvn8x16.psf",		"tcvn",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-helvetica-medium-r-normal--14-*-*-*-*-tcvn-5712" ],
  "viscii"     => [ "viscii10-8x16.psf",	"viscii",
	"*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1," .
	"*-helvetica-medium-r-normal--14-*-*-*-*-viscii1.1-1" ],
);

1;

sub list { map { $_->[0] } values %languages }
sub lang2text { $languages{$_[0]} && $languages{$_[0]}[0] }
sub text2lang {
    my ($t) = @_;
    while (my ($k, $v) = each %languages) {
	lc($v->[0]) eq lc($t) and return $k;
    }
    die "unknown language $t";
}

sub set {
    my $lang = shift;

    if ($lang) {
	$ENV{LC_ALL} = $lang;
	$ENV{LANG} = $languages{$lang}[2];
	$ENV{LANGUAGES} = $languages{$lang}[3];
	if (my $f = $languages{$lang}[1]) { load_font($f) }
    } else {
	# stick with the default (English) */
	delete $ENV{LANG};
	delete $ENV{LC_ALL};
	delete $ENV{LINGUAS};
    }
}

sub write {
    my ($prefix) = @_;
    my $lang = $ENV{LC_ALL};

    $lang or return;
    local *F;
    open F, "> $prefix/etc/sysconfig/i18n" or die "failed to reset $prefix/etc/sysconfig/i18n for writing";
    my $f = sub { $_[1] and print F "$_[0]=$_[1]\n"; };

    &$f("LC_ALL", $lang);
    if (my $l = $languages{$lang}) {
	&$f("LANG", $l->[2]);
	&$f("LANGUAGE", $l->[3]);

	$l->[1] or return;
	if (my $c = $charsets{$l->[1]}) {
	    &$f("SYSFONT", $c->[0]);
	    &$f("SYSFONTACM", $c->[1]);

	    my $p = "$prefix/usr/lib/kbd";
	    commands::cp("-f", 
		     "$p/consolefonts/$c->[0].gz", 
		     glob_("$p/consoletrans/$c->[1]*"), 
		     "$prefix/etc/sysconfig/console");
	}
    }
}

sub load_font {
    my ($charset) = @_;
    my $fontFile = "lat0-sun16";
    my $fontSet = "*-helvetica-medium-r-normal--14-*-*-*-*-iso8859-1";

    if (my $c = $charsets{$charset}) {
	log::l("loading " . $c . " font");
        $fontFile = $c->[0];
	$fontSet = $c->[2];
    }

    # text mode font  
    log::l("loading font /usr/share/consolefonts/$fontFile");
    #c::loadFont("/tmp/$fontFile") or log::l("error in loadFont: one of PIO_FONT PIO_UNIMAPCLR PIO_UNIMAP PIO_UNISCRNMAP failed: $!");
    #print STDERR "\033(K";

    # X11 font
    log::l("fontset: " . $fontSet);
    Gtk::Gdk::Font::fontset_load("*",$fontSet);
}