#!/usr/bin/perl -w
use strict;

# Generates a version of .po file, which is a translation
# into a language the same as English, with replacement as specified in PoChange

use POSIX;
use FindBin;
use lib "$FindBin::Bin/../perllib";
use PoChange;

chdir("$FindBin::Bin/../locale");
mkdir("en_GB.UTF-8");
mkdir("en_GB.UTF-8/LC_MESSAGES");

my $pofile = shift;
die "Please supply a filename" unless $pofile;

open(MAINPO, "FixMyStreet.po") or die "";
open(EHAPO, ">$pofile.po") or die "";
open(NEWPO, ">en_GB.UTF-8/LC_MESSAGES/$pofile.po") or die "";

print NEWPO "# AUTOMATICALLY GENERATED by make_po, do not edit\n";
print NEWPO "#\n";

print EHAPO "# AUTOMATICALLY GENERATED by make_po, do not edit\n";
print EHAPO "#\n";

my $buffer = "";
my $start = 0;
while(<MAINPO>) {
    if (!$start) {
        s/#, fuzzy/#/;
    }
    if (m/"Last-Translator: FULL NAME/) {
        $_ = '"Last-Translator: mysociety/bin/make_po\\n"'."\n";
    }
    if (m/"PO-Revision-Date: YEAR-MO-DA/) {
        my $time = POSIX::strftime("%Y-%m-%d %H:%M%z", localtime(time()));
        $_ = '"PO-Revision-Date: '.$time.'\\n"'."\n";
    }
    if (m/"Language-Team: LANGUAGE/) {
        $_ = '"Language-Team: mySociety\\n"'."\n";
    }
    if (m/"Plural-Forms: nplurals=/) {
        $_ = '"Plural-Forms: nplurals=2; plural=n != 1;\\n"'."\n";
    }

    if (m/^#/) {
        # comment or blank line
        print NEWPO $_;
        print EHAPO $_;
    } elsif (m/^\s+$/) {
        # blank line
        $start = 1;
        $buffer = "";
        print NEWPO $_;
        print EHAPO $_;
    } elsif ($start && (m/^msgstr ""/ || m/^msgstr\[0\] ""/)) {
        # start of translated text - translate English into Empty Homes language

        $buffer = PoChange::translate($pofile, $buffer);

        print EHAPO $buffer;

        if (m/^msgstr\[0\] ""/) {
            $buffer =~ s/^msgid "/msgstr[0] "/m;
            $buffer =~ s/^msgid_plural "/msgstr[1] "/m;
	    print EHAPO $_;
            $_ = <MAINPO>; # skip untranslated plural
	    print EHAPO $_;
        } else {
            $buffer =~ s/^msgid "/msgstr "/;
	    print EHAPO $_;
        }

        print NEWPO $buffer;
        $buffer = "";
    } else {
        # English text
        print NEWPO $_;
	print EHAPO $_ unless $start;
        $buffer .= $_;
    }

}