package timezone;

use diagnostics;
use strict;

use common qw(:common :system);
use commands;
use log;


sub getTimeZones {
    my ($prefix) = @_;
    local *F;
    open F, "cd $prefix/usr/share/zoneinfo && find [A-Z]* -type f |";
    my @l = sort map { chop; $_ } <F>;
    close F or die "cannot list the available zoneinfos";
    @l;
}

sub read ($) {
    my ($f) = @_;
    my %t = getVarsFromSh($f) or die "cannot open file $f: $!";

    ("timezone", $t{ZONE}, "GMT", text2bool($t{GMT}));
}

sub write($$$) {
    my ($prefix, $t, $f) = @_;

    eval { commands::cp("-f", "$prefix/usr/share/zoneinfo/$t->{timezone}", "$prefix/etc/localtime") };
    $@ and log::l("installing /etc/localtime failed");
    setVarsInSh($f, {
	ZONE => $t->{timezone},
	GMT  => bool2text($t->{GMT}),
	ARC  => "false",
    });
}

my %l2t = (
'Danish (Denmark)' => 'Europe/Copenhagen',
'English (USA)' => 'America/New_York',
'English (UK)' => 'Europe/London',
'Estonian (Estonia)' => 'Europe/Tallinn',
'Finnish (Finland)' => 'Europe/Helsinki',
'French (France)' => 'Europe/Paris',
'French (Belgium)' => 'Europe/Brussels',
'French (Canada)' => 'Canada/Atlantic', # or Newfoundland ? or Eastern ?
'German (Germany)' => 'Europe/Berlin',
'Hungarian (Hungary)' => 'Europe/Budapest',
'Icelandic (Iceland)' => 'Atlantic/Reykjavik',
'Indonesian (Indonesia)' => 'Asia/Jakarta',
'Italian (Italy)' => 'Europe/Rome',
'Italian (San Marino)' => 'Europe/San_Marino',
'Italian (Vatican)' => 'Europe/Vatican',
'Italian (Switzerland)' => 'Europe/Zurich',
'Japanese' => 'Asia/Tokyo',
'Latvian (Latvia)' => 'Europe/Riga',
'Lithuanian (Lithuania)' => 'Europe/Vilnius',
'Norwegian (Bokmaal)' => 'Europe/Oslo',
'Norwegian (Nynorsk)' => 'Europe/Oslo',
'Polish (Poland)' => 'Europe/Warsaw',
'Portuguese (Brazil)' => 'Brazil/East', # most people live on the east coast
'Portuguese (Portugal)' => 'Europe/Lisbon',
'Romanian (Rumania)' => 'Europe/Bucharest',
'Russian (Russia)' => 'Europe/Moscow',
'Slovak (Slovakia)' => 'Europe/Bratislava',
'Spanish (Spain)' => 'Europe/Madrid',
'Swedish (Finland)' => 'Europe/Helsinki',
'Swedish (Sweden)' => 'Europe/Stockholm',
'Turkish (Turkey)' => 'Europe/Istanbul',
'Ukrainian (Ukraine)' => 'Europe/Kiev',
'Walon (Belgium)' => 'Europe/Brussels',
);

sub bestTimezone {
    my ($langtext) = @_;
    $l2t{common::bestMatchSentence($langtext, keys %l2t)};
}

1;